Photo-induced in situ crosslinking of polymer brushes with dimethyl maleimide moieties for dynamically stimulating stem cell differentiation

Yoshinori Arisaka, Yuka Nishijima, Shin Ichi Yusa, Naoya Takeda

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    We designed photo-crosslinkable polymer brushes with dimethylmaleimide moieties, in order to demonstrate dynamic stimulation of cell differentiation in mesenchymal stem cells (MSCs). The polymer brushes were synthesized by surface-initiated reversible addition fragmentation chain transfer polymerization using dimethylmaleimide ethyl methacrylate and methyl methacrylate on a chain transfer agent-immobilized glass surface. The polymer brushes were crosslinked by photodimerization of the dimethylmaleimide moieties within polymer chains with stem cells present on the surface. In order to evaluate the effects of in situ photo-induced crosslinking of the polymer brushes on gene expression of stem cells, human bone marrow MSCs were cultured under static and dynamic culture conditions for 7 days. Expression of the osteocalcin (Ocn) gene in MSCs was used as an indicator of osteoblast differentiation under dynamic culture conditions. Structural conversion from non-crosslinked polymer brushes to crosslinked polymer brushes increased the expression of Ocn by 1.4-fold in the presence of adhered cells, compared with non-crosslinked polymer brushes under static culture conditions. These results suggest that MSCs recognized surface conversion from non-crosslinked to crosslinked structures, which resulted in altered differentiation lineages. Therefore, photo-crosslinkable surfaces with dimethyl maleimide moieties are potential novel materials for dynamically stimulating MSC differentiation.

    Original languageEnglish
    Pages (from-to)1331-1340
    Number of pages10
    JournalJournal of Biomaterials Science, Polymer Edition
    Volume27
    Issue number13
    DOIs
    Publication statusPublished - 2016 Sep 1

    Keywords

    • dimethyl maleimide
    • dynamic differentiation
    • mesenchymal stem cell
    • Photo-induced crosslinking
    • polymer brush

    ASJC Scopus subject areas

    • Biophysics
    • Bioengineering
    • Biomaterials
    • Biomedical Engineering

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