title: A growth-promoting factor existing on the body surface of rats.
abstract: Effects of water-soluble matter adhering to rat hairs on fibroblasts were examined. The dialysate of the wash water of rat hairs significantly enhanced the cell proliferation of both diploid human dermal fibroblasts (DHDF) and diploid rat fibroblasts (DRDF). The cell growth-promoting activity was partially purified by a gel filtration column chromatography. The activity permeates through a ultrafiltration membrane (M.W. cut off: 500). Analyses of its chemical nature show that it is soluble in water, dimethyl sulfoxide or acetonitrile, insoluble in other organic solvents examined, stable to heat or pH shock, and resistant to a bacterial protease.
mesh_terms: D000097:Acetonitriles; D000818:Animals; D002455:Cell Division / Q000187:drug effects; D004121:Dimethyl Sulfoxide; D004305:Dose-Response Relationship, Drug; D005347:Fibroblasts / Q000032:analysis / Q000166:cytology; D005856:Germ-Free Life; D006133:Growth Substances / Q000032:analysis*; D006197:Hair / Q000032:analysis*; D008297:Male; D051381:Rats; D012995:Solubility; D014462:Ultrafiltration
chemical_list: D000097:Acetonitriles; D006133:Growth Substances; D004121:Dimethyl Sulfoxide; C032159:acetonitrile