Inoo K, Bando H, Tabata Y. Insulin secretion of mixed insulinoma aggregates-gelatin hydrogel microspheres after subcutaneous transplantation.
Regen Ther 2018;
8:38-45. [PMID:
30271864 PMCID:
PMC6147372 DOI:
10.1016/j.reth.2018.01.003]
[Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/31/2017] [Accepted: 01/09/2018] [Indexed: 12/31/2022] Open
Abstract
Introduction
The objective of this study is to evaluate the insulin secretion of mixed aggregates of insulinoma cells (INS-1) and gelatin hydrogel microspheres after their subcutaneous transplantation.
Methods
Gelatin hydrogel microspheres were prepared by the conventional w/o emulsion method. Cell aggregates mixed with or without the hydrogel microspheres were encapsulated into a pouched-device of polytetrafluoroethylene membrane. An agarose hydrogel or MedGel™ incorporating basic fibroblast growth factor (bFGF) was subcutaneously implanted to induce vascularization. After the vascularization induction, cell aggregates encapsulated in the pouched-device was transplanted.
Results
The vascularization had the potential to enable transplanted cell aggregates to enhance the level of insulin secretion compared with those of no vascularization induction. In addition, the insulin secretion of cell aggregates was significantly promoted by the mixing of gelatin hydrogel microspheres even in the pouched-device encapsulated state.
Conclusion
It is possible that the microspheres mixing gives cells in aggregates better survival condition, resulting in promoted insulin secretion.
INS-1 cell aggregates incorporating gelatin hydrogel microspheres are prepared.
The ratio and number of cells and gelatin hydrogel microspheres affected the formation of cell aggregates.
Gelatin hydrogel microspheres incorporation improves glucose-induced insulin secretion of cell aggregates in vitro.
Gelatin hydrogel microspheres incorporation has the tendency to improve glucose-induced insulin secretion of cell aggregates in vivo.
Vascularization has the potential to improve cell function.
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