Premium
Maintenance of hepatic differentiation by hepatocyte attachment peptides derived from laminin chains
Author(s) -
Kikkawa Yamato,
Kataoka Akira,
Matsuda Yuji,
Takahashi Naoya,
Miwa Takahiro,
Katagiri Fumihiko,
Hozumi Kentaro,
Nomizu Motoyoshi
Publication year - 2011
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.33176
Subject(s) - hepatocyte , laminin , liver cytology , microbiology and biotechnology , integrin , biology , extracellular matrix , biochemistry , cell adhesion , hepatic stellate cell , cell , in vitro , endocrinology , liver metabolism
Hepatocytes rapidly lose hepatic functions upon isolation from liver, perhaps due to disrupted cell/matrix interactions. The matrix macromolecule laminin‐111 consists of three chains, α1, β1, and γ1; it is a major component of Matrigel, which can maintain hepatic differentiation. We previously showed that the A13 peptide (RQVFQVAYIIIKA, α1 chain 121–133) derived from mouse laminin α1 exhibits hepatocyte attachment activity and maintains hepatic differentiation. Here, we sought to identify hepatocyte adhesive sequences from the mouse laminin β1 and γ1 chains using 22 synthetic peptides that show biological activity for fibrosarcoma cells. Nine peptides showed hepatocyte attachment activity. Of these, B160 (VILQQSAADIAR, β1 chain 1607–1618), and C16 (KAFDITYVRLKF γ1 chain 139–150) exhibited the most potent activity. Hepatocytes cultured on both peptides also maintained expression of albumin, tyrosine aminotransferase, tryptophan‐2,3‐dioxygenase, and cytochrome P450. The morphology of hepatocytes on both peptides was a rounded shape typical for hepatic differentiation. We also characterized the nature of adhesion to the peptides. Heparin and EDTA inhibited cell attachment to both peptides, suggesting that hepatocyte attachment to the peptides was mediated by multiple receptors. The identification of active sequences regulating hepatic functions may facilitate the design of hepatocyte culture substrata that can regulate specific cellular behaviors in the context of a bioartificial liver. © 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part A:, 2011.