title: Cholesterol requirement of mycoplasmas.
abstract: Cholesterol requirement for growth of mycoplasmas was tested in a serum-free medium supplemented with albumin, l-arginine, palmitic acid, and various concentrations of cholesterol dissolved in Tween 80. In cases in which Tween 80 was shown to inhibit growth, the test medium was supplemented with cholesterol dissolved in ethanol. Of the 31 species examined, all but Mycoplasma laidlawii, M. granularum, and Mycoplasma species strain S-743 exhibited a growth response to cholesterol. No requirement for cholesterol could be shown with the stable L-phase variants of Streptobacillus moniliformis and Proteus species. The results provide experimental support for the view that the large majority of the established Mycoplasma species require cholesterol for growth.
mesh_terms: D001120:Arginine; D001426:Bacterial Proteins / Q000096:biosynthesis; D001431:Bacteriological Techniques; D002498:Centrifugation; D002784:Cholesterol / Q000378:metabolism*; D003470:Culture Media; D000431:Ethanol; D009174:Mycoplasma / Q000254:growth & development / Q000378:metabolism*; D010169:Palmitic Acids; D011511:Proteus / Q000254:growth & development / Q000378:metabolism; D012710:Serum Albumin, Bovine; D013288:Streptobacillus / Q000254:growth & development / Q000378:metabolism; D013501:Surface-Active Agents
chemical_list: D001426:Bacterial Proteins; D003470:Culture Media; D010169:Palmitic Acids; D013501:Surface-Active Agents; D012710:Serum Albumin, Bovine; D000431:Ethanol; D001120:Arginine; D002784:Cholesterol