Enzymatically fabricated and degradable microcapsules for production of multicellular spheroids with well-defined diameters of less than 150 μm

Shinji Sakai, Sho Ito, Yuko Ogushi, Ichiro Hashimoto, Natsuko Hosoda, Yoshinori Sawae, Koei Kawakami

    研究成果: Contribution to journalArticle査読

    56 被引用数 (Scopus)

    抄録

    Microcapsules with a single, spherical hollow core less than 150 μm in diameter were developed to obtain multicellular spheroids with well-defined sizes of less than 150 μm in diameter. An aqueous solution of phenolic hydroxyl derivative of carboxymethylcellulose (CMC-Ph) containing human hepatoma cell line (HepG2) cells and horse radish peroxidase (HRP) was injected into a coflowing stream of liquid paraffin, containing H2O2, resulting in cell-enclosing CMC-Ph microparticles, 135 μm in diameter, via a peroxidase-catalyzed crosslinking reaction. The CMC-Ph microparticles were then coated with a phenolic hydroxyl derivative of alginate (Alg-Ph) gel membrane several dozen micrometers in thickness, crosslinked via the same enzymatic reaction process, followed by further crosslinking between the carboxyl groups of alginate by Sr2+. A hollow core structure was achieved by immersing the resultant microcapsules in a medium containing cellulase, which degrades the enclosed CMC-Ph microparticles. The HepG2 cells in the microcapsules then grew and completely filled the hollow core. Multicellular spheroids the same size as the CMC-Ph microparticles, with living cells at their outer surface, were collected within 1 min by soaking them in a medium containing alginate lyase to degrade the Alg-Ph gel microcapsule membrane.

    本文言語英語
    ページ(範囲)5937-5942
    ページ数6
    ジャーナルBiomaterials
    30
    30
    DOI
    出版ステータス出版済み - 10 1 2009

    All Science Journal Classification (ASJC) codes

    • Bioengineering
    • Ceramics and Composites
    • Biophysics
    • Biomaterials
    • Mechanics of Materials

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