title: Photoconstructs of nerve guidance prosthesis using photoreactive gelatin as a scaffold.
abstract: We devised a novel nerve prosthesis composed of an elastomeric gelatinous tube and multifilament gelatinous fibers, both of which were prepared from styrene-derivatized gelatin, which allows in situ formation of a bioactive substance-incorporated gel. An in vitro study showed that the axonal regeneration potential of a photocured gelatin layer impregnated with laminin, fibronectin, and NGF was almost comparable with that of coated Matrigel. A nerve conduit and fibers prepared from photoreactive gelatin was subjected to visible-light irradiation with rotation in the presence of camphorquinone as a photoinitiator using a custom-designed apparatus. A sample of transparent gelatinous conduit with an inner diameter of 1.2 mm and a wall thickness of 0.6 mm and gelatin fibers ranging from 10 to 100 pm in diameter were produced. The photocured elastomeric gelatinous tube was flexible and had structural integrity that allowed mechanical handling without breaking. A novel nerve guidance prosthesis composed of tubes packed with fibers was assembled. This photofabrication technology may enable the design of a tailor-made shape and rapid morphogenesis and functional recovery of damaged nerve tissue.
authors.affiliation: Department of Neurosurgery, Graduate School of Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-Ku, Fukuoka 812-8582, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Gámez
authors.forename: K
authors.initials: K
authors.lastname: Ikezaki
authors.forename: M
authors.initials: M
authors.lastname: Fukui
authors.forename: T
authors.initials: T
authors.lastname: Matsuda
mesh_terms: D000818:Animals; D001369:Axons / Q000378:metabolism; D001672:Biocompatible Materials / Q000494:pharmacology; D003094:Collagen / Q000494:pharmacology; D046508:Culture Techniques; D004338:Drug Combinations; D005353:Fibronectins / Q000737:chemistry; D005780:Gelatin / Q000737:chemistry* / Q000378:metabolism; D007797:Laminin / Q000737:chemistry / Q000494:pharmacology; D008027:Light; D008297:Male; D008855:Microscopy, Electron, Scanning; D008858:Microscopy, Phase-Contrast; D008956:Models, Chemical; D020932:Nerve Growth Factor / Q000737:chemistry; D009416:Nerve Regeneration / Q000187:drug effects; D009474:Neurons / Q000166:cytology* / Q000378:metabolism / Q000648:ultrastructure; D011509:Proteoglycans / Q000494:pharmacology; D051381:Rats; D011917:Rats, Inbred Lew; D013729:Terpenes / Q000737:chemistry; D013997:Time Factors; D014014:Tissue Adhesives / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D004338:Drug Combinations; D005353:Fibronectins; D007797:Laminin; D011509:Proteoglycans; D013729:Terpenes; D014014:Tissue Adhesives; C059485:matrigel; C048339:camphoroquinone; D005780:Gelatin; D003094:Collagen; D020932:Nerve Growth Factor