Pancreatic Islets Engineered with SA-FasL Protein Establish Robust Localized Tolerance by Inducing Regulatory T Cells in Mice
Open accessAbstract
Allogeneic islet transplantation is an important therapeutic approach for the treatment of type 1 diabetes. Clinical application of this approach, however, is severely curtailed by allograft rejection primarily initiated by pathogenic effector T cells regardless of chronic use of immunosuppression. Given the role of Fas-mediated signaling in regulating effector T cell responses, we tested if pancreatic islets can be engineered ex vivo to display on their surface an apoptotic form of Fas ligand protein chimeric with streptavidin (SA-FasL) and whether such engineered islets induce tolerance in allogeneic hosts. Islets were modified with biotin following efficient engineering with SA-FasL protein that persisted on the surface of islets for >1 wk in vitro. SA-FasL–engineered islet grafts established euglycemia in chemically diabetic syngeneic mice indefinitely, demonstrating functionality and lack of acute toxicity. Most importantly, the transplantation of SA-FasL–engineered BALB/c islet grafts in conjunction with a short course of rapamycin treatment resulted in robust localized tolerance in 100% of C57BL/6 recipients. Tolerance was initiated and maintained by CD4+CD25+Foxp3+ regulatory T (Treg) cells, as their depletion early during tolerance induction or late after established tolerance resulted in prompt graft rejection. Furthermore, Treg cells sorted from graft-draining lymph nodes, but not spleen, of long-term graft recipients prevented the rejection of unmodified allogeneic islets in an adoptive transfer model, further confirming the Treg role in established tolerance. Engineering islets ex vivo in a rapid and efficient manner to display on their surface immunomodulatory proteins represents a novel, safe, and clinically applicable approach with important implications for the treatment of type 1 diabetes.
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Local rather than systemic immune tolerance was highlighted by the transplantation of a second set of unmodified, donor matched cells that survived when grafted to the original transplantation site but were rejected when transplanted to the other kidney of the same mouse.
“The development of local rather than systemic immune tolerance was further highlighted by the transplantation of a second set of unmodified, donor matched cells that survived when grafted to the original transplantation site but were rejected when transplanted to the other kidney of the same mouse.”
From Developments in stem cell-derived islet replacement therapy for treating type 1 diabetes (2023) · cites this paper as [114]
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Experimental — accuracy not yet measuredAllografts of isolated mouse islets engineered to transiently display FasL on their surface survived indefinitely if also treated for the first 15 days with rapamycin, whereas those without FasL were rejected within 30 days.
“Allografts were able to survive indefinitely if also treated for the first 15 days with rapamycin, whereas those without FasL were rejected within 30 days.”
From Developments in stem cell-derived islet replacement therapy for treating type 1 diabetes (2023) · cites this paper as [114]
FasL induced local immune tolerance by causing apoptosis in alloreactive T-cells and promoting the development of regulatory T-cells (Tregs) for long-term maintenance.
“They demonstrated that FasL induced local immune tolerance by causing apoptosis in alloreactive T-cells and as well as promoting the development of regulatory T-cells (Tregs) for long-term maintenance.”
From Developments in stem cell-derived islet replacement therapy for treating type 1 diabetes (2023) · cites this paper as [114]
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- Authors
- Yolcu, E. S., Zhao, H., Bandura-Morgan, L., Lacelle, C., Woodward, K. B., Askenasy, N., & Shirwan, H.
- Affiliations
- University of Louisville (US)
- Institute for Cellular Therapeutics, University of Louisville , Louisville, KY 40202
- Schneider Children's Medical Center (IL)
- Corresponding author
- Zhao, Hong
- Lacelle, Chantale
- Shirwan, Haval
- Venue
- The Journal of Immunology
- Publisher
- Oxford University Press (OUP)
- Published
- 2011-12-01
- Volume
- 187
- Issue
- 11
- Pages
- 5901-5909
- ISSN
- 0022-1767 (ISSN-L)
- 1550-6606
- PMC
- PMC3232043
- OpenAlex
- W1805798838
- Cited by
- 82
- References
- 49
- Citations by year
- 2026: 4 · 2025: 7 · 2024: 6 · 2023: 6 · 2022: 5 · 2021: 5 · 2020: 7 · 2019: 9 · 2018: 7 · 2017: 6 · 2016: 3 · 2015: 6 · 2014: 5 · 2013: 4 · 2012: 2
- FWCI
- 3.60
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Journal of Immunology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- University of Louisville
- National Heart, Lung, and Blood Institute (T32HL076138)
- National Institute of Allergy and Infectious Diseases (R21AI057903)
- National Institute of Diabetes and Digestive and Kidney Diseases (R43DK079394, R41 DK077242)
- Topics
- Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
- Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
- Keywords
- type 1 diabetes, allogeneic islet transplantation, Fas ligand, regulatory T cells, allograft rejection, effector T cells, rapamycin, adoptive transfer, immunomodulatory proteins
- MeSH terms
- Animals, Diabetes Mellitus, Type 1, Graft Rejection, Immune Tolerance, Immunohistochemistry, Indicators and Reagents, Islets of Langerhans, Mice, Inbred BALB C, Mice, Inbred C57BL, Mice, Transgenic, Recombinant Fusion Proteins, Transplantation, Homologous, Islets of Langerhans Transplantation, Adoptive Transfer, Streptavidin, T-Lymphocytes, Regulatory, Mice, Fas Ligand Protein
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