Nanocasting of fibrous morphology on a substrate for long-term propagation of human induced pluripotent stem cells

Sisi Li, Momoko Yoshioka, Junjun Li, Li Liu, Shixin Ye, Ken Ichiro Kamei, Yong Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Human-induced pluripotent stem cells (hiPSCs) can be self-renewed for many generations on nanofibrous substrates. Herein, a casting method is developed to replicate the nanofibrous morphology into a thin layer of polymethylsiloxane (PDMS). The template is obtained by electrospinning and chemical crosslinking of gelatin nanofibers on a glass slide. The replicas of the template are surface-functionalized by gelatin and used for propagation of hiPSCs over tenth generations. The performance of the propagated hiPSCs is checked by immunofluorescence imaging, flowcytometry, and RT-PCR, confirming the practicability of this method. The results are also compared to those obtained using electrospun nanofiber substrates. Inherently, the PDMS replica is of low stiffness and can be reproduced easily. Compared to other patterning techniques, casting is more flexible and cost-effective, suggesting that this method might find applications in cell-based assays that rely on stringent consideration of both substrate stiffness and surface morphology.

Original languageEnglish (US)
Article number025014
JournalBiomedical Materials (Bristol)
Volume17
Issue number2
DOIs
StatePublished - Mar 2022

Keywords

  • extracellular matrix
  • nanocasting
  • nanofiber
  • stem cells
  • substrate

ASJC Scopus subject areas

  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

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