Generation of glucose sensitive insulin‐secreting cells from human induced pluripotent stem cells on optimized polyethersulfone hybrid nanofibrous scaffold

Abstract

Background: In the realm of diabetes treatment, various strategies have been tried, including islet transplantation and common drug therapies, but the limitations of these procedures and lack of responsive to the high number of patients have prompted researchers to develop a new method. In recent decades, the use of stem cells and three-dimonsional (3D) scaffold to produce insulin-secreting cells is one of the most promising new approaches. Meanwhile, human-induced pluripotent stem cells (iPSCs) propose due to advantages such as autologousness and high pluripotency in cell therapy. This study aimed to evaluate the differentiation of iPSCs into pancreatic islet insuli-producing cells (IPCs) on Silk/ PES (polyethersulfone) nanofibers as a 3D scaffold and compare it with a twodimonsional (2D) cultured group.Methods: Investigating the functional, morphological, molecular, and cellular characteristics of differentiated iPSCs on control cultures (without differentiation medium), 2D and 3D were measured by various methods such as electron microscopy, Q-PCR, immunofluorescence, western blot, and ELISA.Results: This investigation revealed that differentiated cells on the 3D Silk/PES scaffold expressed pancreatic specific-markers such as insulin and pdx1 at higher levels than the control and 2D groups, with a significant difference between the two groups. All results of Q-PCR, immunocytochemistry, and western blot showed that IPCs in the silk/PES 3D group was more efficient than in the 2D group. In the face of these cases, the release of insulin and C-peptide in response to several concentrations of glucose in the 3D group was significantly higher than in the 2D culture. Conclusion:Finally, our findings displayed that optimized Silk/PES 3D scaffolds can enhance the differentiation of IPCs from iPSCs compared to the 2D culture group.

Progress of polyethersulfone composites and their applications in biomedical engineering

“…For example, Hosseini et al constructed silk/PES hybrid nanofibers to mimic the in vivo microenvironment for human adipose-derived stem cell differentiation into insulin-producing cells (IPCs). 135 Ahmadi et al found that the differentiated cells on 3D silk/PES nanofibers scaffold expressed pancreatic specific-markers such as insulin and pdx1 at higher levels than that on tissue culture plates, 136 demonstrating the advantages of composite nanofibers for IPSC-derived insulin-producing cell proliferation. Similarly, Ghollasi et al grafted laminin on the PES nanofibers to investigate the neural differentiation of human-induced pluripotent stem cells (hiPSCs).…”