Morphological and functional behaviors of rat hepatocytes cultured on single-walled carbon nanotubes

Haruka Koga, Tsuyohiko Fujigaya, Naotoshi Nakashima, Kohji Nakazawa

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)


    This study describes the morphological and functional behaviors of rat hepatocytes on single-walled carbon nanotube (CNT)-coated surfaces. Although the hydrophobic characteristics of CNT-coated surfaces increased with increasing CNT density, hepatocyte adhesion decreased, indicating that the interaction between hepatocytes and CNTs is weak. We found that hepatocytes on a CNT-coated surface gradually gather together and form spheroids (spherical multicellular aggregates). These spheroids exhibit compact spherical morphology with a smooth surface and express connexin-32, an intracellular communication molecule. In contrast, collagen treatment in conjunction with the CNT-coated surface improved hepatocyte adhesion, and the cells maintained a monolayer configuration throughout the culture period. The albumin secretion and ammonia removal activities of hepatocyte spheroids were maintained at elevated levels for at least 15 days of culturing as compared with hepatocyte monolayers. These results indicate that CNTs can be used for the formation and long-term culture of hepatocyte spheroids.

    Original languageEnglish
    Pages (from-to)2071-2078
    Number of pages8
    JournalJournal of Materials Science: Materials in Medicine
    Issue number9
    Publication statusPublished - Sept 2011

    All Science Journal Classification (ASJC) codes

    • Biophysics
    • Bioengineering
    • Biomaterials
    • Biomedical Engineering


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