Shielding islets with human amniotic epithelial cells enhances islet engraftment and revascularization in a murine diabetes model. - Université de Lille
Article Dans Une Revue American Journal of Transplantation Année : 2020

Shielding islets with human amniotic epithelial cells enhances islet engraftment and revascularization in a murine diabetes model.

Fanny Lebreton
  • Fonction : Auteur
Kevin Bellofatto
  • Fonction : Auteur
Charles H. Wassmer
  • Fonction : Auteur
Lisa Perez
  • Fonction : Auteur
Vanessa Lavallard
  • Fonction : Auteur
Géraldine Parnaud
  • Fonction : Auteur
David Cottet-Dumoulin
  • Fonction : Auteur
Domenico Bosco
  • Fonction : Auteur
Véronique Othenin-Girard
  • Fonction : Auteur
Begona Martinez de Tejada
  • Fonction : Auteur
Ekaterine Berishvili
  • Fonction : Auteur

Résumé

Hypoxia is a major cause of considerable islet loss during the early posttransplant period. Here, we investigate whether shielding islets with human amniotic epithelial cells (hAECs), which possess anti-inflammatory and regenerative properties, improves islet engraftment and survival. Shielded islets were generated on agarose microwells by mixing rat islets (RIs) or human islets (HI) and hAECs (100 hAECs/IEQ). Islet secretory function and viability were assessed after culture in hypoxia (1% O2) or normoxia (21% O2) in vitro. In vivo function was evaluated after transplant under the kidney capsule of diabetic immunodeficient mice. Graft morphology and vascularization were evaluated by immunohistochemistry. Both shielded RIs and HIs show higher viability and increased glucose-stimulated insulin secretion after exposure to hypoxia in vitro compared with control islets. Transplant of shielded islets results in considerably earlier normoglycemia and vascularization, an enhanced glucose tolerance, and a higher β cell mass. Our results show that hAECs have a clear cytoprotective effect against hypoxic damages in vitro. This strategy improves β cell mass engraftment and islet revascularization, leading to an improved capacity of islets to reverse hyperglycemia, and could be rapidly applicable in the clinical situation seeing that the modification to HIs are minor.
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Dates et versions

hal-04760373 , version 1 (30-10-2024)

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Citer

Fanny Lebreton, Kevin Bellofatto, Charles H. Wassmer, Lisa Perez, Vanessa Lavallard, et al.. Shielding islets with human amniotic epithelial cells enhances islet engraftment and revascularization in a murine diabetes model.. American Journal of Transplantation, 2020, American Journal of Transplantation, 20, pp.1551-1561. ⟨10.1111/ajt.15812⟩. ⟨hal-04760373⟩

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