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  • Title: Generation of insulin-producing cells from human induced pluripotent stem cells on PLLA/PVA nanofiber scaffold.
    Author: Enderami SE, Kehtari M, Abazari MF, Ghoraeian P, Nouri Aleagha M, Soleimanifar F, Soleimani M, Mortazavi Y, Nadri S, Mostafavi H, Askari H.
    Journal: Artif Cells Nanomed Biotechnol; 2018; 46(sup1):1062-1069. PubMed ID: 29486602.
    Abstract:
    Pancreatic tissue engineering as a therapeutic option for restoring and maintenance of damaged pancreas function has a special focus to using synthetic Scaffolds. This study was designed to evaluate pancreatic differentiation of human induced pluripotent stem cells (hiPSCs) on poly-L-lactic acid and polyvinyl alcohol (PLLA/PVA) scaffolds as 3 D matrix. During differentiation process, morphology of cells gradually changed and iPSCs derived insulin producing cells (iPSCs-IPCs) formed spherical shaped cell aggregation that was the typical shape of islets of pancreas. The highly efficient differentiation of iPSCs into a relatively homogeneous population of IPCs was shown by immunostaining. Real-time reverse transcription polymerase chain reaction (RT-PCR) results demonstrated that iPSCs-IPCs expressed pancreas-specific transcription factors (Pdx1, insulin, glucagon and Ngn3). The expressions of these transcription factors in PLLA/PVA scaffold were significantly higher than 2 D groups. Furthermore, we showed that concentration of insulin and C-peptide in PLLA/PVA scaffold and/or 2 D culture in response to various concentrations of glucose increased but the difference between them were not significant. Altogether the current results demonstrated that PLLA/PVA scaffold could provide the microenvironment that promotes the pancreatic differentiation of iPSCs, up-regulate pancreatic-specific transcription factors and improved metabolic activity.
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