Derivation of iPSCs after culture of human dental pulp cells under defined conditions

PLoS One. 2014 Dec 18;9(12):e115392. doi: 10.1371/journal.pone.0115392. eCollection 2014.

Abstract

Human dental pulp cells (hDPCs) are a promising resource for regenerative medicine and tissue engineering and can be used for derivation of induced pluripotent stem cells (iPSCs). However, current protocols use reagents of animal origin (mainly fetal bovine serum, FBS) that carry the potential risk of infectious diseases and unwanted immunogenicity. Here, we report a chemically defined protocol to isolate and maintain the growth and differentiation potential of hDPCs. hDPCs cultured under these conditions showed significantly less primary colony formation than those with FBS. Cell culture under stringently defined conditions revealed a donor-dependent growth capacity; however, once established, the differentiation capabilities of the hDPCs were comparable to those observed with FBS. DNA array analyses indicated that the culture conditions robustly altered hDPC gene expression patterns but, more importantly, had little effect on neither pluripotent gene expression nor the efficiency of iPSC induction. The chemically defined culture conditions described herein are not perfect serum replacements, but can be used for the safe establishment of iPSCs and will find utility in applications for cell-based regenerative medicine.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Cell Differentiation
  • Cells, Cultured
  • Dental Pulp / cytology*
  • Humans
  • Induced Pluripotent Stem Cells / cytology*
  • Primary Cell Culture / methods

Grants and funding

This work was supported by grants from the Ministry of Education, Science, and Culture of Japan (http://www.mext.go.jp/a_menu/shinkou/hojyo/main5_a5.htm; grant number:22592181 TK), and the JST Yamanaka iPS Cell Project (http://www.jst.go.jp; TK, TS, KT). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.