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Biomaterials. 2011 Oct;32(29):6912-9. doi: 10.1016/j.biomaterials.2011.05.058. Epub 2011 Jul 20.

Engineered polymer-media interfaces for the long-term self-renewal of human embryonic stem cells.

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1
Department of Bioengineering, University of California at Berkeley, Berkeley, CA 94720, United States.

Abstract

We have developed a synthetic polymer interface for the long-term self-renewal of human embryonic stem cells (hESCs) in defined media. We successfully cultured hESCs on hydrogel interfaces of aminopropylmethacrylamide (APMAAm) for over 20 passages in chemically-defined mTeSR™1 media and demonstrated pluripotency of multiple hESC lines with immunostaining and quantitative RT-PCR studies. Results for hESC proliferation and pluripotency markers were both qualitatively and quantitatively similar to cells cultured on Matrigel™-coated substrates. Mechanistically, it was resolved that bovine serum albumin (BSA) in the mTeSR™1 media was critical for cell adhesion on APMAAm hydrogel interfaces. This study uniquely identified a robust long-term culture surface for the self-renewal of hESCs without the use of biologic coatings (e.g., peptides, proteins, or Matrigel™) in completely chemically-defined media that employed practical culturing techniques amenable to clinical-scale cell expansion.

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