Project ACT series

This article is the last part of a series exploring the different ways that Breakthrough T1D’s Project ACT (Accelerate Cell Therapies) is shaping the future of cell therapies for type 1 diabetes (T1D).

Read last month’s article about the role of Advocacy in cell therapies for T1D.


Cell therapies, which place insulin-producing cells back into the bodies of people with T1D, are making major headway in clinical trials—and people are becoming insulin independent. In past installments of this article series, we’ve explored how we got to this point at every step in the pipeline: from advocating for funding, to conducting research in laboratories, to clinical testing in humans, and to working with regulators and insurers.

But we’re not at the finish line yet. Approval of manufactured cell therapies isn’t enough to make sure that people who want these cells can get them. So, how do we fill this gap?

Medical Affairs is the backbone of clinical adoption

The answer is Medical Affairs—Breakthrough T1D’s newest mission pillar—which aims to support the clinical adoption of manufactured cell therapies. As we are soon approaching the regulatory submission of a first-generation manufactured cell therapy, Medical Affairs initiatives will be especially important in making sure that healthcare professionals (HCPs) have the tools they need to bring these therapies to clinics. By partnering with global experts and HCPs to increase knowledge and clinical competencies, the Medical Affairs team is working to ensure the future delivery of manufactured cell therapies to eligible people with T1D.

Learn more about why Medical Affairs is important for every treatment, therapy, drug, and device for T1D.

Preparation is key

Since manufactured cell therapies for T1D are not yet FDA-approved, we are at a critical moment where preparation is essential. This is why the Medical Affairs team is planning now for the eventual arrival of first-generation manufactured cell therapies. They are partnering with advanced clinical teams to determine best practices to ensure that clinics have the right resources and skillsets. They are anticipating obstacles—and finding solutions—to the adoption of manufactured cell therapies. Then, when these therapies become available, HCPs will be ready and waiting to deliver them to people with T1D.

Assembling expert clinical teams and facilities

For people with T1D to have access to manufactured cell therapies, comprehensive expert clinical care teams need to be at the ready. To make this possible, we are starting at the very beginning: in training programs.

New, updated programs and fellowships must incorporate specialized education around cell therapies (such as optimized immunosuppression regimens and pre- and post-transplant education) for the next generation of HCPs. At a time when there are too few endocrinologists and certified diabetes care and education specialists, there’s no better time than now to encourage trainees to enter the field. We need to ensure that T1D care teams have trained professionals who are up to pace with the newest cell therapy protocols.

In line with these efforts, the Medical Affairs team is also working to recognize expert multidisciplinary Centers of Reference, which are a network of T1D treatment centers that have the personnel, resources, facilities, and skills to deliver manufactured cell therapies to people with T1D with a consistent approach. These centers will act as training hubs and share outcomes to continuously improve and establish best practices as manufactured cell therapies are incorporated into clinics.

Guidelines, statements, workshops, and more

The Medical Affairs team is working with experts in the field on publications that will guide care teams to further support the standardized integration of manufactured cell therapies into clinical practice.

Clinical guidelines

Clinical guidelines are recommendations for clinicians about how to care for people with T1D. They are informed by a systemic review of evidence by experts to assess benefits versus risk of care options.

Consensus statements

Consensus statements are collective opinions of an expert panel representing the multidisciplinary care team and voice of people with T1D. These statements are developed when evidence is still being gathered.

To drive these efforts, the Medical Affairs team hosts workshops, convening international experts to collaborate and discuss ideas. Using established methodologies, these projects ensure that the final document reflects expert consensus. One of the latest workshops assembled islet cell transplantation professionals from around the world to begin developing a consensus on the clinical roadmap of cell replacement therapies—the first step of many toward clinical adoption.

Read more about the most recent Medical Affairs workshops, including one geared toward creating Centers of Reference. See a recent example of clinical guidelines for monitoring early-stage T1D.

Opportunities to learn

Through decades of research, we’ve learned a lot about T1D—and the newest therapies and treatments are as innovative and complex as ever. To keep up with the rapidly changing pace of innovation, the Medical Affairs team has put together opportunities for HCPs learn about cutting-edge advancements.

These HCP resources offer accredited, free, live or on-demand education around the latest T1D research. There is also information on upcoming conferences, published guidelines, and clinical trial opportunities, in addition to an email newsletter with regular updates. Accredited HCP education is essential to ensure that clinicians have the most up-to-date knowledge that they can share with the T1D community—an important step in clinical adoption. Cell therapy resources are currently under development and expected in the next year.

Clinical trial education and awareness

Clinical trials are a key step in ensuring that new and effective T1D treatments and cures, including manufactured cell therapies, can safely make their way to the T1D community. The Medical Affairs team is working to foster a culture of research participation by ensuring that HCPs have access to information on current clinical trials and can help to educate the T1D community on their importance.

The ultimate goal is to increase awareness about clinical trial opportunities and support shared decision-making between people with T1D and their diabetes care team about clinical trial participation. The bottom line? HCPs and the T1D community must be equipped with information to enable them to make informed choices about participating in cell therapy clinical trials.  


Medical Affairs help turn groundbreaking science into real care—by supporting doctors, educating communities, and making sure cell therapies for type 1 diabetes reach the people who need them most.”
Thomas Danne, M.D., Ph.D. Chief Medical Officer, Global

The bigger picture: Project ACT across the pipeline

In this series, we’ve explored how manufactured cell therapies are moving through every step of the pipeline. We took a deep dive into the challenges that researchers are addressing to optimize manufactured cells. We surveyed the different cell therapies that are in currently clinical testing. We reviewed how advocacy shapes funding, regulatory decisions, and access to cell therapies. Finally, we considered how to ensure the clinical adoption of manufactured cell therapies.

This is where Breakthrough T1D’s Project ACT (Accelerate Cell Therapies) comes in. The ultimate goal is to accelerate manufactured cell therapies that do not require immunosuppression—all the way from the first discovery research in the lab to the adoption of cell therapies in clinics.

At every step of the way, we are moving cell therapies through the pipeline as fast as possible. Breakthrough T1D is preparing for the day when first generation manufactured cell therapies are available, and we are working toward a future with next generations of therapies that do not require immunosuppression. Thanks to concerted efforts by Breakthrough T1D’s Research, Advocacy, and Medical Affairs teams, each day we move closer to manufactured cell therapies becoming a reality for everyone with T1D.

A meeting of the minds

This past week, Breakthrough T1D helped organize an event hosted by Member of European Parliament Tomislav Sokol, Ph.D., titled “Accelerating Breakthroughs to Address Unmet Needs in Type 1 Diabetes.” This meeting, a significant coming-together of Breakthrough T1D and European policymakers, focused on the role of the EU in addressing the needs of the T1D community and accelerating T1D breakthroughs.

The purpose of this meeting was to raise awareness of T1D and the urgent need for the accelerated development and approval of breakthrough therapies in the EU. Conversations between Breakthrough T1D and European policymakers homed in on barriers and opportunities to advancing cures—including cell therapies and disease-modifying therapies—in the EU to get them into the hands of people with T1D, faster. This was an important step in establishing an open dialogue between Breakthrough T1D and the EU Institutions about working together to address T1D globally.

“This event in the EU Parliament allows us to engage with important decision-makers to ensure that the research and policy environments are oriented in a way to accelerate development of T1D breakthrough therapies in the EU as we also do in other countries,” explained Campbell Hutton, Senior Vice President of Global Advocacy at Breakthrough T1D.

Attendees

Several Breakthrough T1D leadership and staff members attended the meeting, including Thomas Danne, M.D., Ph.D., Chief Medical Officer, Global; Sanjoy Dutta, Ph.D., Chief Scientific Officer; Lynn Starr, Chief Global Advocacy Officer, Carmen Hurtado del Pozo, Director, European Research; and Campbell Hutton, Senior Vice President of Global Advocacy.

Several Members of the European Parliament (MEP) in addition to host Tomislav Sokol, Ph.D., were in attendance. Other attendees included people with a lived experience of T1D, health staff from EU Member States, researchers in the EU, and other European diabetes organizations.

Dr. Dutta delivered a talk on the role of breakthrough therapies in transforming T1D. Dr. Danne moderated a panel to provide insight about unlocking the potential of cell therapies breakthroughs in the EU with T1D cell therapy researchers: Professor Lorenzo Piemonti, M.D., Director of the Diabetes Research Institute at Vita-Salute San Raffaele University and Associate Professor Francoise Carlotti, Ph.D., Head of the Islet Research Lab at Leiden University Medical Center. Finally, Lynn Starr closed with remarks about our shared global responsibility to work toward breakthrough T1D therapies.

Breakthrough T1D leadership and staff who attended the meeting.

When and where it took place

The event took place on June 5, 2025, in Brussels, Belgium, at the European Parliament.

Driving toward T1D cures in the EU and beyond

T1D is on the rise around the world, including in Europe. Recent publications by Breakthrough T1D staff and leadership brought attention to the rise in incidence and global T1D burden. We need to act now in conjunction with governments around the world—like the EU—to address the unmet needs of everyone around the world affected by T1D.

T1D cures, including cell therapies, are advancing through the clinical pipeline. Bringing awareness of T1D to the forefront—and educating key people on the progress we’re making toward cures—will be incredibly important for driving T1D research forward in the EU. This represents a critical opportunity for the EU to accelerate cell therapies faster than ever. As a global organization, Breakthrough T1D is collaborating with the EU government to help make this possible.

As the largest global funder of T1D research, Breakthrough T1D has provided funding to researchers across the world in addition to the EU. Right now, Breakthrough T1D is supporting €56 million in European initiatives, including 31 clinical trials—representing 19% of our funded research (including the U.K.). Breakthrough T1D has expert teams in research, medical, regulatory, and advocacy in Europe, meaning we are uniquely positioned to provide guidance on how the EU can strengthen its T1D efforts and collaborate on a global scale to drive T1D breakthroughs, especially in cell therapies.

Type 1 diabetes is a critical disease in Europe, and I was pleased to host an event for the T1D community and my colleagues in the European Parliament to learn about the unmet needs in T1D and how we can work together to accelerate breakthrough therapies in Europe to address those needs.”
Tomislav Sokol, Ph.D. Member of the European Parliament

What Breakthrough T1D leadership is saying

Lynn Starr, Chief Global Advocacy Officer

“This meeting is critically important to bringing the unmet needs of the T1D community into the spotlight in the EU. Global advocacy for curative T1D research is essential to achieving Breakthrough T1D’s mission, and continued collaboration with EU policymakers will get us there faster.”

Lynn Starr

Chief Global Advocacy Officer

ADCES Sanjoy Dutta and Anastasia Albanese-O'Neill

“Cell therapies are accelerating through the clinical pipeline faster than ever. We need to act now on a global scale to ensure that people with T1D around the world can access these transformative therapies. This meeting is a significant step toward that goal.”

Sanjoy Dutta, Ph.D.

Chief Scientific Officer

Accelerating global action is paramount to our mission

Global problems require global solutions. This meeting served as a critical launching point for a continued partnership with the EU to fill gaps and address unmet needs for the T1D community. Building relationships and fostering long-term partnerships is critically important for reaching our common goal of bringing cures to people with T1D as soon as possible.

These important conversations between Breakthrough T1D and the EU government align with our Project ACT (Accelerate Cell Therapies) initiative to accelerate the development of cell therapies that do not require immunosuppression—for everyone with T1D in every country. In addition, through international Centers of Reference, Breakthrough T1D’s Medical Affairs team is developing expert clinical care centers that will be trained and ready to provide cell therapies to people with T1D once they become available. We are at the forefront of global action to prepare the world for curative cell therapies.

We are driving toward a future in which everyone with T1D—no matter where they are—has access to therapies, treatments, and care, bringing us closer to achieving our mission of a world without T1D. The more people we have working toward our mission, the faster we will get there.

Outside the Cammett family’s Michigan home sat a new toy truck. John, around six years old, admired its sturdy metal frame, fresh rubber wheels, and bright yellow decals. But it would not stay that way for long. 

John and his two brothers were athletic, boisterous, and yes, at times, destructive. After the truck was thoroughly battered, John’s mother, Barbara, began her work on the piece. She was creative and artistic and knew just what to do. With paint brushes in hand, she covered the damaged truck in a collage of color and something new emerged. It was no longer a wreck, it was a work of art.

John Cammett, now 62, says he’ll always remember that day and the special lesson that came from it. 

“Even with all that destruction, she could make something look beautiful,” he said.

Like mother, like son 

John’s mom was diagnosed with type 1 diabetes (T1D) in her 30s and passed away in 2021 at age 89. She inspired John, who also lives with T1D, to become a champion for others with the condition. John has since become a longtime volunteer, leader, and advocate for Breakthrough T1D—providing transformational support of our mission. 

In recognition of his deep commitment, the Breakthrough T1D Center of Excellence in New England was recently named for his mother. The center will now be known as the Breakthrough T1D Barbara Dewey Cammett Center of Excellence in New England. John helped establish the center and provided foundational support for Project ACT (Accelerate Cell Therapies), Breakthrough T1D’s initiative to make cell therapies as cures for T1D a reality. 

My mom was the strongest person I’ve ever known—a real warrior. Even back then, with limited technology, she never let T1D set her back.”
John Cammett, Co-Chairman and Founding Partner of Realterm and Passionate Seed Funder of The Breakthrough T1D Barbara Dewey Cammett Center of Excellence in New England

Honoring her positive spirit 

Since its inception, the Breakthrough T1D Barbara Dewey Cammett Center of Excellence in New England has made significant progress advancing islet cell-based T1D research, enhancing the understanding of the immune response following islet transplantation to prevent rejection, and creating genetically modified islet cells that could withstand the immune attack after transplantation into people living with T1D.  

A photo of the Director of the Breakthrough T1D Barbara Dewey Cammett Center of Excellence in New England David M. Harlan, M.D.; John Cammett; and Breaktthrough T1D CEO Aaron J. Kowalski, Ph.D, together at an event where the Center's new name was shared.
From left: Director of the Breakthrough T1D Barbara Dewey Cammett Center of Excellence in New England David M. Harlan, M.D.; John Cammett; and Breakthrough T1D CEO Aaron J. Kowalski, Ph.D, together at an event where the Center’s new name was shared.

The breakthrough research happening at the center—one of five Breakthrough T1D Centers of Excellence around the world powering advances to deliver cures and life-improving breakthroughs for T1D—is particularly inspiring to John. He takes pride in knowing that the center he helped establish will not only advance this important work but also honor his mother’s positive spirit and enduring legacy. 

“You can’t be a researcher without optimism—every breakthrough stands on the back of countless failures. My mom lived the same way. She was the most optimistic person I’ve ever known, never said a bad word about anyone, and kept going no matter how hard things got. Just like the researchers pushing forward every day, she stayed focused, kind, and hopeful through it all.” 

A beacon of strength

John remembers his mom as a woman whose generous heart, zest for life, and unwavering optimism inspired everyone she met.  

She managed T1D for nearly 60 years with grace, determination, and a smile. Known for her vibrant personality, Barbara embraced life fully. You could often find her cheering on her Wisconsin Badgers, painting beautiful art, volunteering in her community, and effortlessly outdriving her husband on the golf course.

Barbara Dewey Cammett (seated center) with her three sons: John (standing center), Bryan (standing, left) and Stuart (seated, right).

Her kindness, resilience, and passion for connecting with others made her a beloved friend, devoted wife, and beacon of strength to those navigating life with T1D.  

“I wish I could have done this while she was still with me,” John said. “But I know she’d look back and smile. She wanted to help everyone she could. That spirit lives on.”  

By: Adam Baker

Breakthrough T1D’s newest mission pillar, Medical Affairs, is bridging the gap between access to and adoption of T1D therapies. The establishment of this program is essential to Project ACT (Accelerate Cell Therapies): Breakthrough T1D’s initiative to accelerate the development of manufactured islet cell replacement therapies that do not require immunosuppression. The goal is to make sure that people with type 1 diabetes (T1D) can get these therapies as soon as they hit the market.

The field is moving quickly: people are becoming insulin-independent in cell therapy clinical trials. We are advancing towards the submission of the first-generation manufactured islet cell therapy that requires immunosuppression, Vertex’s zimislecel (VX-880). We are at a critical moment and need to act now to ensure that healthcare providers (HCPs) are ready to bring manufactured islet cell therapies into clinical settings.

Enter Medical Affairs

This is where Medical Affairs comes in. The team, led by Thomas Danne, M.D., Chief Medical Officer International, is working with the medical community to anticipate obstacles to getting manufactured islet therapies into clinics and find ways to overcome them now.

To accomplish this, Breakthrough T1D recently hosted two cell therapy workshops, convening multidisciplinary, international experts in islet cell transplantation to discuss a clinical roadmap for manufactured islet cell therapies—and how to ensure that clinical teams are in place and prepared to provide these therapies to people with T1D who qualify. By preparing now, we can get this first-generation therapy into the hands of people with T1D as soon as possible after regulatory approval.

The cell therapy workshops were hosted by Breakthrough T1D’s Thomas Danne, M.D., Chief Medical Officer International, and Anastasia Albanese-O’Neill, Ph.D., APRN, CDCES, Vice President of Medical Affairs.

Read on to learn more about the cell therapy workshops, the attendees, and what each accomplished.

Workshop #1: Who may benefit most from manufactured cell replacement therapies

Attendees

The first of the cell therapy workshops, held in late April, convened transplant surgeons, T1D clinicians and researchers, a member of Vertex’s leadership team, a member of Breakthrough T1D’s Participant Advisory Council to represent people with a lived experience of T1D, and Breakthrough T1D Vice President of Research Esther Latres, Ph.D.

The purpose of this workshop was to start developing a five-year roadmap to help guide the T1D care community to support the adoption of manufactured islet cell therapies in clinical care. The evidence-based recommendations will be vetted by a larger group of clinical experts, diabetes organizations, and people with lived experience with T1D to ensure there is broad agreement. The consensus document will ultimately be published to expand its reach.

This process will summarize the essential evidence that will help HCPs decide who may benefit the most from manufactured islet cell replacement therapies. These decisions will take into account the perspective of people with T1D and differences in age, hypoglycemia unawareness, or kidney health, to name a few. This can help HCPs better understand the benefits versus risks for manufactured cell therapies on a person-by-person basis—making sure that each clinical decision is made jointly to prioritize long-term health.

Workshop #2: Pilot workshop to develop international Centers of Reference for T1D cell therapy

Attendees

The second cell therapy workshop, held in early May, convened clinicians from various global medical institutions, including University of Minnesota Medical Center, University of Wisconsin Health Transplant Center, the Penn Rodebaugh Diabetes Center, University of Chicago Medicine, IRCCS Ospedale San Raffaele (Italy), Institute of Transplantation, Newcastle upon Tyne (United Kingdom), and University of Alberta (Edmonton, Alberta, Canada).

Additional attendees from Breakthrough T1D included CEO Aaron Kowalski, Ph.D., Vice President of Research Esther Latres, Ph.D., the Medical Affairs team, a volunteer, and a member of the Participant Advisory Council, who is a person living with T1D.

The objective of this workshop was to take the first step toward creating Centers of Reference for T1D manufactured cell therapies. “The initial purpose is to accelerate readiness of healthcare professionals to deliver manufactured islet cell therapies once they become available,” explained Dr. Danne. “…making such a treatment a success needs teamwork. Accredited Centers of Reference will not only deliver advanced T1D treatments but also serve as a training hub for professionals aspiring to become experts.”

This workshop focused on better understanding what potential Centers of Reference need to be successful. The attendees covered a range of topics: what an ideal T1D care team might look like, the education and training required for experts in T1D manufactured islet cell therapy, and career development for early-stage T1D professionals.

The goal is to prepare expert clinicians—who are already doing islet cell transplants—to bring manufactured islet cell therapies into clinical practice at their institutions and others, once they have regulatory approval. These centers will serve as a benchmark for best practices in T1D manufactured cell therapy, establishing a network of expert teams to make sure that everyone who can benefit from manufactured cell replacement therapy is given the opportunity to consider it.

What the experts are saying

“We need to build consensus and teamwork. When manufactured cell therapies exist, it’s going to take significant coordination between endocrinologists, transplant surgeons, and people with T1D to ensure as many people as possible are benefiting from these therapies.”

Jon Odorico, M.D.

Professor of Surgery and Director of Pancreas and Islet Transplantation at University of Wisconsin Health Transplant Center

“It’s going to be a significant problem if we have a cure but no one has access to it because no one can deliver it. We must work together—transplant surgeons, endocrinologists, researchers, everyone. It’s like building Cape Canaveral in anticipation of sending rockets into space.”

Peter Senior, MBBS, Ph.D.

Islet Transplant Endocrinologist, Professor in the Department of Medicine, and Director of the Alberta Diabetes Research Institute at the University of Alberta, Canada

This is just the beginning

Manufactured islet cell therapies are coming. We need teamwork to get these therapies into clinics so people with T1D don’t have to wait years to get them. This is why Breakthrough T1D is acting now: when the first manufactured islet cell therapy hits the market, multidisciplinary care teams around the world will be ready. These workshops—the first of many—will help accelerate the safe and effective integration of manufactured islet cell therapies into clinics.

“This way we will ensure that the medical community is ready to deliver manufactured cell therapies once they become more widely available.,” Dr. Danne said. Thanks to the hard work of the Medical Affairs team at Breakthrough T1D, this goal is in sight.

Project ACT series

This article is part of a series exploring the different ways that Breakthrough T1D’s Project ACT (Accelerate Cell Therapies) is shaping the future of cell therapies for type 1 diabetes (T1D). The next article in the series will focus on Project ACT’s advocacy efforts to ensure there is a regulatory pathway to approval for these therapies and that they will be covered by payers.

Read last month’s article about challenges and solutions of T1D cell therapies.


Despite significant advances in treatments for T1D, our community still has significant unmet needs. Breakthrough T1D believes that novel cell therapies will transform T1D management, and Project ACT is how we’re going to make them a reality.

First-generation cell therapies, including FDA-approved, donor-derived Lantidra® and Vertex’s manufactured islet therapy in phase 1/2/3 clinical trials, VX-880 (Zimislecel), are incredibly promising. They have some limitations, including:

Current research efforts at the preclinical, clinical, and manufacturing levels are working to address these challenges. The ultimate goal is a future in which manufactured islet therapies exist in large supply, survive and produce insulin in the body after implantation, and remain protected from the immune system. Learn more about Breakthrough T1D’s Cell Therapies Program and take a closer look at what researchers are doing to turn these ideas into a reality.

Clinical trials to keep an eye on

Up-and-coming cell therapies for T1D are in the clinical pipeline and working their way towards the market, including many that Breakthrough T1D has contributed to. There are some highly anticipated (and currently enrolling!) trials that we have our eyes on right now, and we hope to see data soon. Read about each study in detail below or scroll down to see a summary table.

Late last year, Vertex announced the expansion of their manufactured islet therapy, VX-880 (Zimislecel), to a phase 1/2/3 clinical trial, the final step before seeking FDA approval. This decision stemmed from groundbreaking data in the initial phases of the trial in which 11 of 12 participants reduced or eliminated the need for external insulin therapy. Currently, zimislecel is limited to people with severe hypoglycemia and requires chronic immunosuppression.

The results of the VX-880 trial are highly anticipated since this is the first time a scalable treatment for T1D has entered a final clinical testing stage, and regulatory submission is expected in 2026. Vertex is working closely with regulators to expand its manufacturing capabilities and ensure they are prepared for the therapy to hit the market.

Zimislecel would not have been possible without years of support from Breakthrough T1D and The T1D Fund: A Breakthrough T1D Venture. This includes research grants, an investment by the Fund in Semma Therapeutics (which was later acquired by Vertex), and much more.

It doesn’t stop there: Vertex is expanding their pipeline and investigating different ways to keep manufactured islets safe without standard anti-rejection immunosuppressants, including alternative immunosuppressive regimens, gene-edited immune-protected cells, and novel encapsulation devices.

Although Vertex’s T1D portfolio is progressing, the clinical development of VX-264, an encapsulated islet therapy that does not require immunosuppression, has been discontinued. While it was safe and well-tolerated in clinical trials, it did not meet efficacy and safety endpoints as measured by C-peptide, a biomarker for insulin production.

UP421 consists of islets derived from deceased donors that have been engineered to be hypoimmune, meaning they can avoid detection by the immune system without the need for immunosuppressants. Incredibly, the first person who received a partial dose of UP421, implanted in to forearm muscles, in a phase 1 clinical trial is making their own insulin, as demonstrated by increased C-peptide, without any side effects.

This is the first proof-of-concept evidence showing that this cell engineering approach can enable implanted islets to avoid immune destruction. The next step is applying this method to manufactured islets.

Breakthrough T1D is supporting research exploring similar cell engineering approaches to allow implanted islets to evade the immune system. The T1D Fund has also invested in Sana due to their distinctive hypoimmune manufactured islet replacement program, and Breakthrough T1D continues to work closely with them.

Tegoprubart is an immunotherapy that interferes with immune cell communication and dampens the immune response. This therapy is being tested in a Breakthrough T1D-funded phase 1/2 clinical trial as a novel anti-rejection immunosuppressant for people with severe hypoglycemia who have received deceased donor islets. Building on ongoing kidney transplant studies, this study will determine if tegoprubart can protect transplanted islets from rejection with fewer side effects compared to standard immunosuppressants, which is harsh on people and the implanted cells.

So far, of the first three participants, two have achieved insulin therapy independence. According to the study, tegoprubart is safer for both people and transplanted cells in comparison to standard immunosuppression, with milder side effects and greater islet survival. This study holds promise for preventing rejection of manufactured islets as well.

The T1D Fund has made several investments in Eledon to support this effort as it sees the potential to address the key unmet need of safe and effective immunosuppression for people who receive islet replacement therapies.

Cell Pouch™ is an implantable bio-hybrid organ that provides a specialized environment for transplanted islet cells by allowing them to access oxygen and nutrients provided by blood vessels, called vascularization.

The first cohort of a phase 1/2 clinical trial enrolled participants with severe hypoglycemia who received deceased donor islets within Cell Pouch in addition to standard immunosuppressants. Of the six enrollees, five remain insulin therapy independent from one year to more than five years. Cohort B is currently evaluating a higher-capacity Cell Pouch that can accommodate 50% more islet volume, and the trial will soon advance to Cohort C to further test safety and efficacy of the system.

Most excitingly, Sernova recently announced that following the conclusion of the ongoing clinical trial, they will initiate a new trial to test Cell Pouch implanted with manufactured islets—paving the way towards a scalable solution to T1D.

Breakthrough T1D has supported the development of Cell Pouch™ and continues to work with Sernova.

SR-02 is a manufactured islet cell therapy implanted onto the omentum, a fatty, protective layer around organs. This therapy is in a phase 1/2 clinical trial for people with severe hypoglycemia and requires immunosuppression. The trial is evaluating safety and insulin production as measured by C-peptide.

Seraxis is also working on another manufactured islet therapy (SR-03) that has been gene-edited so that anti-rejection immunosuppressants are not needed. They are hoping to initiate a new clinical trial for SR-03 in 2026.

The T1D Fund has invested in Seraxis to aid in the development of these therapies based on their distinctive and promising islet replacement approach.

CTX211 is another manufactured islet therapy that has been gene-edited to evade the immune system so that recipients do not have to take immunosuppressants. In an ongoing phase 1/2 clinical trial, these cells are implanted within a specialized device to help keep the cells alive in the body, and investigators are evaluating safety as well as insulin production measured by C-peptide. Results are expected this year.

Breakthrough T1D was a long-time supporter of ViaCyte, which initially developed the manufactured islets and partnered with CRISPR Therapeutics to genetically modify them. ViaCyte was acquired by Vertex in July 2022, and now CRISPR Therapeutics is the sole owner of this therapeutic platform.

  • OPF-310 (Otsuka Pharmaceutical): encapsulated islets derived from pigs in phase 1/2 clinical trials
  • ENC-201-CED (Encellin): donor-derived islets in a proprietary encapsulation device implanted subcutaneously in a phase 1 clinical trial
  • Gastrin: a phase 1/2 trial testing if gastrin, a naturally occurring hormone involved in pancreatic development, is safe and helps retain or grow islets following donor-derived islet transplantation

Recruiting cell therapies clinical trials

TherapyPrimary Outcome(s)IDLocationPhase
VX-880 (Zimislecel)Safety, insulin independence, and absence of severe hypoglycemic eventsNCT04786262US/Canada/UK/EU1/2/3
VX-880 (Zimislecel)Insulin independence in people with T1D and a kidney transplantNCT06832410Canada2
UP421SafetyNCT06239636Sweden1
Tegoprubart + donor isletsInsulin independenceNCT06305286US (Chicago, IL)1/2
Cell Pouch™ + donor isletsSafetyNCT03513939US (Chicago, IL)1/2
SR-02Safety, C-peptideNCT06651515US (Pennsylvania)1/2
CTX211Safety, C-peptideNCT05565248Canada1/2
OPF-310HbA1c<7% and absence of severe hypoglycemic eventsNCT06575426US (Chicago, IL)1/2
ENC-201-CED ENCRT + donor isletsSafetyNCT06408311Canada1
Gastrin + donor isletsInsulin independence, absence of severe hypoglycemic events, and HbA1c<6.5%NCT03746769US (Duarte, California)1/2

Where do we go from here?

The emergence of cell therapies for T1D in clinical trials is incredibly exciting for the T1D community. Advancements using deceased donor-derived islets are paving regulatory pathways for manufactured islet therapies—which are curing people with T1D in clinical trials—to make their way towards the market.

“One of the greatest effects that manufactured islet cell therapies will have for the T1D community is being able to think about their type 1 diabetes less,” explained Nicholas Mamrak, Ph.D., a scientist at Breakthrough T1D. This may soon be a reality for a subset of people with T1D as we drive towards the approval of a first-generation manufactured islet replacement therapy, reducing the day-to-day burden of managing blood glucose and insulin dosing.

The ultimate goal is to make sure manufactured islet therapies are available to everyone with T1D—ideally without the need for immunosuppression. This is the objective of Breakthrough T1D’s Project ACT.

Before cell therapies can become available for everyone, they must first receive regulatory approval. A key part of Project ACT is streamlining and advancing regulatory pathways for the treatment of T1D. To help achieve this, Advocacy and Regulatory leadership teams at Breakthrough T1D are working on a new publication capturing how day-to-day lives have changed for people with T1D who have received cell therapies. By using personal experiences to share what benefits of cell therapies matter most to patients, we can help regulators understand the powerful impact that islet replacement therapies can have.

None of this would have been possible without the T1D community’s continued generosity and support, as we all work together to move the needle forward.

Have an impact by participating in clinical trials

Without clinical trials, we would never know if new therapies developed by scientists in the lab could make a difference in people’s lives. This is where the T1D community comes in—by volunteering to participate in clinical trials, you become uniquely positioned to help drive biomedical research forward. Moreover, by participating, you help not only yourself, but everyone with T1D. Find a clinical trial near you and see if you are eligible to participate. Connect with a Clinical Trial Education Volunteer in your area, who can answer any questions you may have.

Project ACT series

This article is part of a series exploring the different ways that Breakthrough T1D’s Project ACT (Accelerate Cell Therapies) will shape the future of cell therapies for type 1 diabetes (T1D). The next article in the series will discuss the progress of cell therapies in clinical trials.


We’ve made major progress in the development of cell replacement therapies for type 1 diabetes (T1D) over the past couple of decades. We know that manufactured islets, such as Vertex’s VX-880 (now Zimislecel), can restore insulin therapy independence and glucose control when implanted into people with T1D.

However, there is more work to do.

We need to make sure the cells survive and function, ideally without immunosuppression, and ensure that these therapies are accessible to everyone with T1D. Read on to learn more about where there’s room for improvement and what we’re doing about it.

Optimizing manufactured islets

Priority #1: Cell source

Current external cell sources that are not manufactured in the lab, such as those from deceased donor pancreases or a person’s own cells, are in extremely limited supply. The only FDA-approved cell therapy for T1D, Lantidra®, requires donor cells, and it can take up to three pancreases to get enough islets for one transplant. This is unsustainable and limits the number of people who can get this therapy.

We can consistently generate an unlimited source of islet cells in the lab. This way, we can make enough insulin-producing cells for everyone with T1D and have a single cell source to test and compare multiple strategies to protect them.

Breakthrough T1D is funding an initiative at the Advanced Regenerative Manufacturing Institute (ARMI) to scale up Dr. Jeffrey Millman’s protocol to generate unlimited manufactured islets in a reliable, automated, and reproducible way. Breakthrough T1D is also building a partnership with the Cedars-Sinai Biomanufacturing Center to accomplish this goal.

Priority #2: Cell survival

Implanted islets that move through the bloodstream can cause an inflammatory reaction, resulting in cell death. Alternatively, those that are implanted in devices that are cut off from the blood and immune system are unable to get nutrients and oxygen, again leading to cell death.

It doesn’t have to be the pancreas, but islets need access to nutrients and oxygen so that they can survive for long periods of time and produce insulin.

Breakthrough T1D is funding research to develop scaffolds, which are specialized biomaterials that islet cells can stick to and get nutrients and oxygen to help them survive. Similarly, islets implanted in encapsulation devices, such as Sernova’s Cell Pouch™, can access nutrients and oxygen while having the added benefit of being protected from the immune system. There are also various Breakthrough T1D-funded clinical studies that are investigating different places in the body for manufactured islets, including the omentum and abdominal wall.

Omentum

The omentum is a fatty tissue layer that surrounds and protects the organs in your abdomen. Researchers are testing it as a new implantation site for manufactured islets.

Priority #3: Cell protection

Like organ transplants, manufactured islet therapies from an external source are recognized by the immune system as “non-self,” leading to immune rejection. Currently available cell therapies require broad immunosuppressants that may come with unwelcome side effects, including increased risk of infection and malignancy and toxicity to kidneys, nerves, and islet cells themselves.

By swapping standard immunosuppressives with options that have less complications, more people with T1D will be able to access these therapies.

Research and clinical studies funded by Breakthrough T1D approach immune protection from many different angles. This includes genetically engineered islets that can evade immune detection, encapsulation devices, and immunomodulatory therapeutics that can dampen the immune response.

The future of manufactured islets and T1D cures

There’s a lot of promising solutions in the pipeline. What’s next? Unlocking access.

“We recognize that approval of cures is not a life-changing breakthrough if people do not have access to the therapy itself,” said Aaron Turner-Phifer, Senior Director of Health Policy at Breakthrough T1D. “Building on the experience gained from past breakthroughs, we are working now, across our Mission teams, to identify and remove any potential barriers to people accessing cell therapies.”


“While our work is just beginning, we’ve already conducted market analysis to identify clinical and payer barriers to give us clarity on where to start. We are directly engaging policymakers and health plans to educate them on T1D cell therapies. We’ve also launched data projects to begin to generate the types of data required to positively inform future policy and coverage decisions.”

Aaron Turner-Phifer


In the coming years, it’s likely that first-generation manufactured islet therapies will be available to people with T1D with severe hypoglycemia unawareness and will require broad immunosuppression.

Later, advancements in cell survival and immune protection—combined with the advent of more tolerable immune suppression approaches—will open the doors for more people with T1D to access these life-changing therapies.

Without continuous support from the T1D community and its supporters, we would never have gotten this far. Breakthrough T1D looks forward to a future where manufactured islet therapies are a reality for everyone with T1D, and we will not stop until we get there.

Young woman in a doctor's office

When Tzield was approved by the United States Food and Drug Administration (FDA), the type 1 diabetes (T1D) community had real cause to celebrate: The first disease-modifying therapy for T1D​ had cleared one of the last major hurdles to becoming available. 

No Smoking

Disease-modifying therapies

Also "DMTs" for short, these therapies prevent, slow, halt, or reverse T1D progression.

But once Tzield was on the market and covered by health insurance companies and other payers, a new hurdle emerged: a majority of healthcare providers across the country were unaware of the drug, let alone how to administer it.

The clinical guideline for Tzield infusion did not become available until a year and a half after the FDA approved the drug. To date, 500 people in the U.S. with early stage T1D have received Tzield. Compare that to the annual incidence rate of T1D in the U.S. according to the T1D Index:

52,560
Number of people in the U.S. diagnosed with type 1 diabetes annually.

According to a 2023 study in the journal Diabetes Technology & Therapeutics, Tzield isn’t the only advanced T1D therapy with a surprisingly low adoption rate.

The FDA approved the first artificial pancreas (AP) system in 2016. Less than a decade later, there are now eight such approved systems on the market. These systems—also called automated insulin delivery (AID) systems—lead to better T1D management and health outcomes—yet only 16 percent of people with T1D in the United States use them.

Similarly, the FDA approved Lantidra, the first donor-derived cell therapy for T1D, in 2023. To date, one person has received it. 

Increasing adoption to improve health 

Closing the gap between access to and adoption of T1D therapies is a mission priority for Breakthrough T1D.

“It’s similar to the question: ‘If a tree falls in the forest and no one is there, does it make a sound?’” said Anastasia Albanese-O’Neill, Ph.D., APRN, CDCES, Associate Vice President of Breakthrough T1D’s Community Screening and Clinical Trial Education programs. “In this case, if you have a cutting-edge new therapy but most healthcare providers don’t know about it, don’t prescribe it, and don’t know how to administer it, does it have an impact?”

The organization recently announced the establishment of a Medical Affairs unit. The team will address the numerous challenges contributing to the slow adoption of groundbreaking T1D therapies, delaying their life-changing potential for many people living with the disease.

Challenges we are addressing:

HCPs have much greater knowledge of type 2 diabetes—or T2D—which is more prevalent.

HCPs need comprehensive guidelines to support new, approved treatment options.

There are too few clinical environments with the equipment and expertise to administer advanced T1D therapies and treatments, such as new T1D devices, therapies that require infusions like Tzield, and treatments that require implantation, such as cell therapies.

There are too few endocrinologists and certified diabetes care and education specialists with knowledge and competency in advanced T1D therapies.

With the establishment of our Medical Affairs team, we are reaffirming our organization’s commitment to creating a world where every individual with type 1 diabetes has access to life-changing therapies. By addressing systemic barriers and fostering clinical readiness, Breakthrough T1D will be pivotal in driving the timely adoption of emerging therapies and transforming care.” 
Thomas Danne, M.D. Breakthrough T1D Chief Medical Officer, International

As part of this organizational change, the Community Screening and Clinical Trial Education team, led by Albanese-O’Neill, will be integrated into Medical Affairs. 

The team will focus on developing education materials for healthcare professionals in the U.S. and around the world; empowering people with T1D to participate in shared decision-making with their healthcare teams about emerging T1D therapies; helping to establish and socialize clinical care guidelines tailored to regional needs; and expanding clinical trial participation through community activation and HCP education.  

“We have been doing a great deal of work to expand our HCP education, T1D community screening, and clinical trial education programs for more than three years now,” said Albanese-O’Neill, who has been with Breakthrough T1D as a fulltime staff member since 2022. “Given what we are seeing with adoption rates and with Dr. Danne joining us, we are now putting all of this work together in one department with a more strategic approach.” 

Empowering clinicians with education

The team recently launched comprehensive, expertly redesigned HCP education and training resources.

These resources—which are accredited, free-of-charge, and live or on-demand—offer a significant focus on early detection for the earliest stages of T1D, monitoring guidance for positive test results, clinical trial opportunities, and the latest on cutting edge T1D therapy research and development, including disease-modifying therapies and islet cell therapies.

While designed specifically for healthcare professionals who can earn 4.5 credit hours of continuing medical education, the resources are available to the public. The on-demand feature means busy healthcare professionals with schedules that include all kinds of shifts imaginable can access this turn-key resource on their own time. 

For a deeper dive, Breakthrough T1D’s resources will also offer live sessions, allowing time to interact with and learn from leading experts in the T1D field, including Albanese-O’Neill and Danne, in addition to those affiliated with different clinical facilities and institutions across the nation. 

Our goal is to make this education as accessible as possible.”
Julianne Lally, DMSc, MHS, PA-C Breakthrough T1D Associate Director of Community Screening and Clinical Trial Education

Detecting T1D before symptoms present

A simple blood test can detect T1D in the earlier stages—before obvious symptoms develop. The biggest challenge is educating clinicians and the general population about it.  

Type 1 diabetes stages and symptoms

“Endocrinologists, Pediatricians, and some other specialty physicians learn about T1D screening and monitoring during their residencies, but it’s not a part of the general curriculum of the first four years of medical school,” said Lally, who built the learning management system for the new resources and is organizing the virtual offerings. “We’re working to advance that knowledge to yes, doctors, but also other clinicians whose patients could benefit.”

Many clinicians hesitate to order unfamiliar tests—especially if they are unsure what to do with the results. Most people who see any kind of healthcare provider could benefit from screening for T1D—according to a paper published in the journal US Endocrinology, roughly 85 percent of people diagnosed with type 1 do not have a blood relative with the autoimmune disease. 

“Clinicians need to learn about the stages of type 1 and the specific autoantibody tests that identify type 1 versus type 2 and identifying type 1 in individuals at risk before they need insulin,” said Colleen Buggs-Saxton, M.D. Ph.D.

Buggs-Saxton, a Pediatric Endocrinologist at Wayne Pediatrics in Michigan, is the clinical leader of a Breakthrough T1D Early Detection pilot clinic. Using the new resources, she and Albanese-O’Neill are going to lead a grand rounds about T1D early detection at her institution, which is affiliated with the Wayne State University School of Medicine and healthcare system. 

Clinicians should consider autoantibody testing for adults who have been diagnosed with type 2 but don’t have typical clinical features and require insulin to manage their blood sugars.” 
Colleen Buggs-Saxton, M.D., Ph.D. Pediatric Endocrinologist

“This is a novel way these resources can be used—as the basis of a locally and or virtually-provided grand rounds,” said Albanese-O’Neill.

While much of the emphasis of T1D early detection programs has been on children and teens, its applications are much broader—anyone can develop T1D at any age and unfortunately, misdiagnoses happen. According to an article published in the journal The Lancet, Regional Health: Europe, it is estimated that nearly 40 percent of adults older than age 30 with T1D may have been misdiagnosed with T2D. 

“Most clinicians are very comfortable ordering an HbA1c test to classify people with type 2 diabetes, but they do not know what tests to order to classify people with type 1,” added Buggs-Saxton.

Timely Type 1 Diabetes Diagnosis

Grand rounds

Grand rounds are educational meetings and presentations for clinical teams at a given institution or healthcare facility to provide a summary of updates to the standards of care.

Test tubes with blue liquid water samples and pipette over blue background. Laboratory glassware, science laboratory research concept.

What to do with positive test results 

The screening test is just the first part of T1D early detection. Clinicians also need to know what to do with positive results once they come in. Breakthrough T1D’s HCP resources offer extensive education on the topic. 

Less than one year ago, Breakthrough T1D and other leading diabetes organizations developed monitoring guidance to help clinicians support people who test positive for stage 1 or stage 2 T1D. The guidelines have been endorsed by leading medical journals and organizations around the world. 

”This monitoring guidance can help any clinician feel confident in providing adequate care in the early stages of type 1 and know when to refer to a specialist,” said Albanese-O’Neill. 

I think of research, advocacy, and medical affairs as three legs of a stool—in terms of clinical adoption, each helps answer a different question. Research: Does it work? Advocacy: Will the regulators approve it and will insurance companies cover it? Medical Affairs: Do clinical teams have the competency and readiness to prescribe the treatment and educate and support people with T1D?” 
Anastasia Albanese-O’Neill, Ph.D., APRN, CDCES Breakthrough T1D Associate Vice President of Community Screening and Clinical Trial Education

It’s also helpful for the people who test positive for early stage T1D. Using the monitoring guidance, people can work with their healthcare team to monitor blood glucose levels to identify when insulin therapy may be needed; consider participating in clinical trials of disease-modifying therapies in development; and consider when and whether Tzield might be appropriate. 

“There is currently one FDA-approved disease-modifying therapy for early-stage type 1 diabetes and additional therapies are being studied in clinical trials,” said Lally. “Identifying type 1 early gives the individual and their family time to learn more about type 1 and their options before reaching stage 3 T1D, which requires daily insulin therapy.” 

Healthcare provider speaks to patient

Clinical trials: Increasing patient referrals 

Clinical trials are a vital step for any treatment, drug, or device to make it into the hands of people with T1D. Currently, more than 300 clinical trials focused on T1D are actively recruiting participants.  

Moreover, clinical trials can offer people the chance of receiving a cutting-edge treatment they may not otherwise be able to access.   

Through its HCP resources and existing clinical trial resources, Breakthrough T1D is stressing the significance of investigational T1D therapies—while also clarifying common misconceptions about clinical trials.  

“The clinical trial education portion of the program explains current trial opportunities and the critical need to increase diversity in diabetes research,” said Lally. 

Despite the importance of clinical trials, many are delayed due to slow enrollment, adding cost and prolonging the results. A 2020 Tufts University study found that nearly 90 percent of clinicians surveyed felt comfortable talking about clinical trials. 

“Unfortunately, the survey also revealed that annually, fewer than one percent of patients are referred to clinical trials,” said Lally. 

So, why aren’t more clinicians referring their patients to clinical trials? Time and resources. 

The most challenging part is helping patients understand what a clinical trial is, what it involves, and how previous scientific advances were only possible because of clinical trials. Healthcare providers often don’t have enough time in their busy clinics to discuss this with patients and families.”
Laura Jacobsen, M.D. Pediatric Endocrinologist

Jacobsen, who is with University of Florida Health (UF Health), is one of the faculty members for Breakthrough T1D’s new HCP resources—specifically, the offering related to currently recruiting clinical trials for T1D disease-modifying therapies. 

Jacobsen stresses that families and individuals with T1D also need specific education on the potential of receiving a placebo during a clinical trial—and why it’s an impactful part of any clinical trial. 

Clinicians also may not know how to quickly get and stay up to date on current trial opportunities and how to get individuals who test positive for T1D autoantibodies involved.  

“We provide a streamlined presentation about how to talk to families of people with T1D or people at risk for T1D about clinical trials,” explains Jacobsen, “We can direct families to one of several websites for more detailed information, like Breakthrough T1D’s Clinical Trial Finder.” 

Scientific cell graphic

Cell therapies: Cures within reach 

Cell therapies are one of the most promising approaches to curing T1D and one of the cornerstones of Breakthrough T1D’s cures research portfolio. 

Advances in cell therapies have ramped up in recent years: participants in clinical trials of these therapies have been able to stop taking insulin. To speed this progress even more, Breakthrough T1D recently launched Project ACT (Accelerate Cell Therapies).   

Maintain Beta Cells

Cell Therapies

Also called islet cell therapies, these therapies replace destroyed beta cells so that people with T1D can again produce their own insulin.

The organization has long invested in cell therapy research and has a track record of success in making life-changing T1D therapies a reality—the prime examples being artificial pancreas systems (AP systems) and Tzield. 

The work of Breakthrough T1D’s Research, Advocacy, and Medical Affairs teams—in partnership with the organization’s venture philanthropy fund, the T1D Fund—will be integral to Project ACT’s success.  

Like AP systems, Tzield, and all other FDA-approved drugs, treatments, and medical devices on the market today, islet cell therapies will only become available after meeting all the required benchmarks—including clinical trials. 

Clinicians who are in-the-know about clinical trials and how to help their patients enroll are but one of the numerous ways Breakthrough T1D’s Project ACT will make islet cell therapies a reality, faster.   

“Clinicians are generally the most trusted source for this information, but most are not making those referrals, so the gap never closes,” said Lally. “We aim to change that.”   

“We want every member of the diverse T1D community to be aware of clinical trials, how to participate, and where to find information,” added Albanese-O’Neill. “The next generation of breakthroughs depends on it.” 

Editor’s note: This story co-written by Ginger Vieira, special contributor to Breakthrough T1D.

Type 1 diabetes (T1D) is caused by the autoimmune destruction of insulin-producing beta cells in the pancreas. People with T1D are dependent on insulin therapy to control their blood sugar levels, which is critical to prevent complications that occur when blood sugar is too high (hyperglycemia) or too low (hypoglycemia).

The best bet for T1D cures depends on cell therapies, which replace destroyed beta cells with protected, functional cells to restore insulin therapy independence and glucose control, ideally without chronic immunosuppression. Breakthrough T1D’s Cures Program has been instrumental in the incredible progress we’ve made in cell therapies research. The secret to success? Stem cells. 

What are stem cells?

Stem cells are uniquely suited for use in cell therapies because of their biological characteristics. First, they are essentially a blank slate—we can biologically engineer them to become any cell we want, including beta cells. Second, stem cells can make copies of themselves while remaining a blank slate, meaning we can generate an unlimited source of transformable cells.

Since scientists first isolated human stem cells in 1998, there has been major progress in therapies that can replace or renew damaged and diseased tissue. For example, people with blood cancer often undergo chemotherapy and radiation to destroy cancerous blood cells. Stem cells are delivered directly into the bloodstream and travel to the bone marrow, where they transform into new, non-cancerous blood cells, replacing the important cells that were lost with healthy ones. The exciting progress in stem cell research extends to T1D—researchers have harnessed the power of stem cells to generate functional beta cells and islets, rapidly accelerating the drive toward T1D cures. Breakthrough T1D has been at the forefront of stem cell research in T1D for decades. 

Stem cells are the foundation of our Cell Therapies Program 

Breakthrough T1D’s Cell Therapies Program focuses solely on making and improving stem cell-derived beta cells. For stem cell-based therapies to become a reality for everyone with T1D, there are three primary goals that we are striving to achieve:

Breakthrough T1D has put tremendous effort into achieving these goals; we’ve seen incredible progress in recent years, pushing us closer than ever to cures for T1D.

Breakthrough T1D has driven more than $156 million to cell therapies research in the past decade and has spearheaded several initiatives to drive this effort forward. In 2013, the Beta Cell Replacement Consortium was launched, bringing together 50+ of the brightest scientists and key industry players to integrate expertise in bioengineering, animal models, transplant medicine, and other key research areas.

Similarly, Breakthrough T1D established several Centers of Excellence, a collection of institutions driving exceptional advancements in immunology, stem cell biology, and gene editing, all of which are critically important to cell therapies research. The ultimate goal of these initiatives is to foster collaboration, exchange resources and data, and accelerate the development of stem cell-derived islet therapies. 

Looking forward

With Breakthrough T1D’s commitment to driving cell therapies forward, we have made significant headway in the development of life-changing therapies that can place healthy, insulin-producing beta cells back into people with T1D. “Even with today’s fantastic automated insulin delivery systems and advanced algorithms, those living with T1D still spend a significant amount of time interacting with their devices in order to maintain blood sugar control,” said Nicholas Mamrak, a scientist at Breakthrough T1D. “The prospect of cell therapies lies in the ability to take off these pumps and spend less time managing and worrying about their diabetes.”

The drive toward stem cell-based therapies becoming a reality for everyone with T1D continues—despite how far we’ve come, we still have more work to do.

This article is the first of a series exploring the different ways that Breakthrough T1D’s Project ACT (Accelerate Cell Therapies) will shape the future of cell therapies for type 1 diabetes (T1D). Stay tuned for the next article, which will explore the present and future of cell therapies for T1D.

Today, Sana Biotechnology released significant clinical data: the first person with type 1 diabetes (T1D) who received deceased donor islets engineered to evade the immune system is producing insulin without immunosuppression.

The details

This is a big step for cell-based therapies for T1D. Sana’s first-in-human study consists of allogeneic islets, meaning they are derived from an external source, which in this case is the pancreases of deceased donors. These islets were engineered to avoid recognition by the immune system (hypoimmune) and were implanted intramuscularly into a person with T1D. After four weeks, circulating C-peptide increased, meaning that the beta cells are alive, healthy, and producing insulin—all without the need for immunosuppression and no safety issue. This is the first evidence of engineered islets successfully avoiding immune destruction.

What this means for the T1D community

While this is an incredibly promising step forward for the T1D community, currently available cell therapies that rely on deceased donor islets (Lantidra®) are only accessible to a small portion of the T1D population because there are very few donor cells available. They also require broad anti-rejection immunosuppressants, which can come with serious side effects that may not be manageable for everyone with T1D. Engineering cells to evade immune attack is a new path forward to protect the insulin-producing beta cells and avoid the use of immunosuppressants. Most importantly, this technology can now be applied to stem cell-based therapies, which is a scalable solution for many people with T1D.

What’s next: lots to look forward to

Breakthrough T1D believes that the best bet for type 1 diabetes cures lies in stem cell-based therapies since deceased donor islets are in short supply, while stem cell-derived islets can be produced at scale. We have now opened the doors to apply hypoimmune technology to stem cell-derived islets, moving us closer to the possibility of having enough immune-evading cells for everyone with T1D. While this will take significant time, effort, and money, every day we take another step toward a possible life-changing T1D cure. 

Breakthrough T1D’s role

The primary objective of Breakthrough T1D’s beta cell replacement efforts is to place insulin-producing cells into people with T1D without the use of immunosuppressants. Breakthrough T1D strongly supports the development of stem cell-based therapies that do not require broad immunosuppression and recently launched an initiative to accelerate this faster than ever (Project ACT – Accelerate Cell Therapies). To contribute to the advancement of these game-changing therapies, the T1D Fund: A Breakthrough T1D Venture invested in Sana recognizing that their hypoimmune engineering technology held significant promise for type 1 diabetes cell therapies. We look forward to seeing how the trial progresses.

While we look back on 2024, we can reflect upon the incredible progress we’ve made in advancing breakthroughs toward cures and improving everyday life with T1D.  

This wouldn’t have been possible without each and every one of you and your continued support of our mission as we drive toward cures for T1D.  

Here are the top 11 advances that together, we made happen in 2024: 

Breakthrough T1D announced the launch of Project ACT, an initiative aimed at accelerating breakthroughs in T1D cell replacement therapies that do not require broad immunosuppression. Recent advances, such as Vertex’s stem cell-derived islets, have been made possible by Breakthrough T1D’s Cell Therapies program as part of our drive toward cures. The goal of Project ACT is to push research, development, regulatory policies, access, and adoption to increase the rate at which cell therapies without the need for broad immunosuppressants will become available to people with T1D.  

Why this matters: Immunosuppressive drugs are a barrier to access to cell replacement therapies because of their toxic side effects, which is why islet transplants are currently only available to people with severe low blood sugar (hypoglycemic) unawareness and episodes. By striving toward a future where we realize the benefits of cell replacement therapies without the downsides of the current regimen of immunosuppressants, we will make islet replacement therapies broadly accessible to the T1D community.  

Vertex’s clinical trial of VX-880, a first-generation stem cell-derived islet replacement therapy for people with severe hypoglycemia (requiring the use of immunosuppressants), has transitioned into a phase 1/2/3, or pivotal, trial. This news comes after Vertex shared incredibly promising data in the earlier phases of the trial, including 11 of 12 participants reducing or eliminating the need for external insulin.  

The upcoming trial will expand to 50 people who will get a single, target dose of VX-880. The primary endpoint will be insulin therapy independence without severe hypoglycemic events after one year. This is the final clinical testing stage before Vertex can seek FDA approval.  

Breakthrough T1D has a decades-long relationship with Vertex and the leading scientists behind stem cell-derived islet therapies, an advancement that would not have been possible without Breakthrough T1D funding and support. The T1D Fund had invested in Semma Therapeutics, which was acquired by Vertex Pharmaceuticals in 2019, eventually leading to the active clinical development of VX-880 in T1D. 

Why this matters: This is the first time a scalable cure for T1D is entering phase 3 clinical trials—a significant win and a huge step toward accelerating the delivery of cell therapies to members of the T1D community 

Tegoprubart: Transplant Survival Without Standard Immunosuppressive Drugs 

Tegoprubart, an anti-CD40L immunotherapy that limits the immune response, is being tested in a Breakthrough T1D-funded study in people with T1D and severe hypoglycemia who have received deceased donor islets. Eledon Pharmaceuticals announced promising initial results in which two of three people achieved insulin therapy independence. According to the study, tegoprubart is safer for both people and transplanted cells in comparison to broad immunosuppressants, with milder side effects and greater islet survival. To further support this effort, the T1D Fund: A Breakthrough T1D Venture invested in Eledon

Cell Pouch: A Home for Transplanted Islets 

Breakthrough T1D has been supporting the development of Cell Pouch, an implantable device from Sernova that provides a safe, immune-protected environment for transplanted islet cells. In phase 1/2 clinical trials, all six people who received donor islets within the Cell Pouch achieved sustained insulin therapy independence with immunosuppressants, including long-term islet survival and function over five years without harmful side effects.  

Why this matters: Standard of care immunosuppressive drugs that help avoid transplant rejection come with unwelcome side effects, such as increased risk of infection and malignancy and toxicity to kidneys, nerves, and islet cells themselves. Breakthrough T1D is focused on finding alternative ways to keep transplanted islet cells alive and healthy so that cell replacement therapies can become more tolerable and accessible.   

In a major effort spearheaded by Breakthrough T1D, the first internationally recognized clinical guidelines for those who test positive for T1D autoantibodies have been published. These include guidance on monitoring frequency, education, and psychosocial support in addition to recommended actions for healthcare professionals (HCPs) when the risk of T1D progression is high. The guidelines were cooperatively developed with over 60 international experts spanning ten countries. 

Why this matters: Previously, there had been no consensus on monitoring guidelines for people who test positive for T1D autoantibodies. Standardization of clinical recommendations means that individuals, families, and HCPs have tangible next steps to monitor early T1D progression and catch life-threatening complications sooner.  

  • Breakthrough T1D is leading a campaign to secure a recommendation for T1D screening from the U.S. Preventative Services Task Force (USPSTF), the main authority for preventative care. Approval would require T1D screening to be covered by insurance—an important step forward in expanding access. 
  • Driven by Breakthrough T1D’s advocacy efforts, The Centers for Medicare and Medicaid Services (CMS) established a unique ICD-10 code for stage 2 T1D. ICD-10 codes are used by HCPs to classify and document diagnoses, symptoms, and procedures. These codes provide a unified way for doctors and providers to indicate what diseases or conditions a person has in their electronic health record (EHR), empowering HCPs to document accurate diagnoses and provide the best possible care. 

Why this matters: T1D early detection is critically important to prevent life-threatening complications at diagnosis and to give people necessary resources to make informed decisions about their health. Integrating T1D screening into the U.S. healthcare system will increase access to care.  

The past year has seen some important advances in glucose management therapies and devices: 

  • Cadisegliatin, an activator of a blood sugar regulator in the liver, is being investigated in a phase 3 clinical trial (TTP399) as an adjunct therapy to insulin for people with T1D, although it is currently placed on clinical hold. vTv Therapeutics, the trial sponsor, is also a T1D portfolio company. 
  • The Omnipod 5 app is now available for the iPhone, making it easier to control the Omnipod without the need to carry a controller. It can also integrate with the Dexcom G6 continuous glucose monitor (CGM).  

Why this matters: While advancements in glucose management have been pivotal in improving health outcomes for people with T1D, access remains a challenge. AID systems are globally underutilized, and not everyone has the necessary technology to connect devices. Breakthrough T1D is working to not only support advances in glucose management but also increase access.  


Related content: While Breakthrough T1D consistently strives to improve the lives of those living with T1D, as an organization we have made incredible progress in the development of AID systems, also called the artificial pancreas systems. Read a historical perspective written by Breakthrough T1D volunteer Doug Lowenstein that covers conception to FDA approval of the first artificial pancreas systems, which changed the lives of people with T1D.  

An inquiry spearheaded by the Breakthrough T1D affiliates in the U.K. uncovered risks of developing T1D eating disorders (T1DE), including bulimia, anorexia, or insulin restriction to lose weight. There is a significant gap in education and clinical guidelines for HCPs, a lack of internationally recognized criteria for T1DE diagnosis, and insufficient care integration, leading to preventable complications and healthy years of life lost. Breakthrough T1D recognizes the importance of spreading awareness and support for T1DE, and much work is needed to improve the lives of those living with T1DE.  

Why this matters: There is an urgent need to change the way T1DE is approached, including integrated physical care with mental health services to get people with T1DE the access to care that they need.  

In a study that included people with T1D, finerenone (Kerendia®) has been shown to improve cardiovascular outcomes in adults with heart failure. The drug is already approved in the U.S. to treat kidney and cardiovascular disease in people with T2D. Based on these results, Breakthrough T1D is supporting a clinical trial (FINE-ONE) in conjunction with Bayer to investigate the use of finerenone for T1D with the hopes of reducing kidney complications.  

Why this matters: Kidney and cardiovascular disease remain significant challenges for those with T1D, especially given the FDA’s recent rejection of an SGLT inhibitor to lower blood glucose in people with T1D and chronic kidney disease. Yet, a new clinical trial (SUGARNSALT) will better assess the benefits versus risks. 

Breakthrough T1D is advocating for the regulatory approval of C-peptide, a biomarker for insulin production by beta cells, to be used as an endpoint in clinical trials. An endpoint can accurately predict a meaningful benefit in clinical trials for disease-modifying therapies (DMTs; treatments that can slow, halt, or reverse T1D). To support this endeavor, Breakthrough T1D scientists and an expert consensus panel published research with evidence supporting C-peptide as an endpoint. Breakthrough T1D is continuing to engage with regulators, coordinate with industry, and assess more clinical trial data to drive this effort forward. 

Why this matters: Current clinical trial endpoints (HbA1c, hypoglycemia, and complications) are not the best way to gauge the clinical benefits of T1D therapies. If C-peptide gets regulatory approval to be used as an endpoint, clinical trials could be smaller and shorter while still accurately assessing the advantages of a DMT. This means that drug development can move more quickly, and people with T1D will be able to access therapies sooner. 


Related content: Two years ago, the T1D community received the incredible news that Tzield® had become the first FDA-approved disease-modifying therapy that can significantly delay T1D onset. Breakthrough T1D volunteer Doug Lowenstein recounts the life-changing drug’s journey nearly 100 years after the discovery of insulin. 

The T1D Index is a data simulation tool that measures the global health impact of T1D, bridging gaps in our knowledge of public health statistics. T1D Index 2.0 has new and improved functionality, including advanced simulation capabilities, validation of data, and enhanced user experience. Breakthrough T1D contributed to both the development and improvement of the T1D Index.  

Why this matters: The T1D index is critical in defining the intercontinental scope of T1D, driving us toward country-specific solutions and improved global health outcomes.  

Earlier this year, JDRF rebranded to Breakthrough T1D. While our mission remains the same, our name needs to better reflect who we are and where we’re going. Our new brand aligns with our mission to accelerate life-changing breakthroughs for those of every age living with T1D as we work toward a world without it.   

Why this matters: The proof is in the name—each day we strive to increase and accelerate breakthroughs in T1D, and it’s critical for our brand to accurately reflect our mission. 

It’s certainly been an exciting year! While we still have more work to do, it’s crucial to celebrate our wins, both big and small, to see how far we’ve come in our push to make T1D a thing of the past.

Together, we’re accelerating breakthroughs for people with T1D, and the support of the T1D community drives our mission forward every single day, leading the way to lifechanging therapies and cures. Let’s see what 2025 has in store!