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A novel cell‐adhesive scaffold material for delivering keratinocytes reduces granulation tissue in dermal wounds
Author(s) -
Masuda Ryuji,
Mochizuki Mayumi,
Hozumi Kentaro,
Takeda Akira,
Uchinuma Eiju,
Yamashina Shohei,
Nomizu Motoyoshi,
Kadoya Yuichi
Publication year - 2009
Publication title -
wound repair and regeneration
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.847
H-Index - 109
eISSN - 1524-475X
pISSN - 1067-1927
DOI - 10.1111/j.1524-475x.2008.00450.x
Subject(s) - keratinocyte , granulation tissue , chitosan , laminin , wound healing , membrane , chemistry , extracellular matrix , peptide , microbiology and biotechnology , biochemistry , biology , in vitro , immunology
ABSTRACT Novel peptide‐conjugated chitosan membranes were fabricated and used to deliver keratinocytes to dermal wounds in mice. Three active peptides of 12 or 13 amino acids each, RLVSYNGIIFFLK (A5G27), ASKAIQVFLLAG (A5G33), and AGTFALRGDNPQG (A99) were selected from a cell‐adhesive peptide library of laminin, a major constituent of basement membrane. The peptides were synthesized and coupled to chitosan membranes, and the resulting peptide–chitosan membranes were tested for keratinocyte attachment. Two of the peptides that bind to cell surface heparin‐like receptors (A5G27 and A5G33) were found to promote strong keratinocyte attachment, whereas the one that binds to integrin (A99) was inactive. Subsequently, A5G27– and A5G33–chitosan membranes were tested as vehicles for keratinocyte delivery in a wound model. We found that keratinocytes were delivered into the full‐thickness wound with either membrane. Using the A5G33–chitosan membrane, we further evaluated the activity of the delivered keratinocytes in wound healing. Immunohistochemistry for granulation tissue markers, including tenascin and α‐smooth muscle actin, showed that keratinocyte delivery by the present peptide–chitosan membranes in the wound bed provided a favorable condition for keratinocyte migration along the wound surface and reduced granulation tissue formation.