title: Synthesis and pyrogenic effect of 3 alpha, 7 alpha-dihydroxy-5 beta-androstan-17-one and 3 alpha-hydroxy-5 beta-androstane-7, 17-dione.
abstract: The first chemical synthesis of 3 alpha, 7 alpha-dihydroxy-5 beta-androstan-17-one and 3 alpha-hydroxy-5 beta-androstane-7, 17-dione is reported. In this method, the 17 beta-side chain of commercial chenodesoxycholic acid was degraded in 6 steps after selective protection of the hydroxyl groups: 3 alpha-OH by a tert-butyldimethylsilyl group and 7 alpha-OH by an acetoxy group. The capacity of 3 alpha, 7 alpha-dihydroxy-5 beta-androstan-17-one and 3 alpha-hydroxy-5 beta-androstane-7, 17-dione to release a pyrogen by human leukocytes was investigated by two independent methods: supernatants from leukocytes incubated with a steroid are injected to rabbits whose fever is measured, or tested by the Limulus Test (a pyrogen detection technique). The 7-keto substituted etiocholanolone still possessed pyrogenic activity, while the 7 alpha-hydroxyl substituted one did not.
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D005043:Etiocholanolone / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D007962:Leukocytes / Q000187:drug effects; D008033:Limulus Test; D008722:Methods; D011749:Pyrogens / Q000032:analysis / Q000494:pharmacology*; D011817:Rabbits
chemical_list: D011749:Pyrogens; C024688:3,7-dihydroxyandrostan-17-one; C024689:3-hydroxyandrostane-7,17-dione; D005043:Etiocholanolone