title: Studies of aloe. VI. Cathartic effect of isobarbaloin.
abstract: The cathartic effect of isobarbaloin, a stereoisomer of barbaloin (compound principally responsible for the cathartic activity of Aloe), was examined in male rats by oral administration. Individual differences in sensitivity in the laxative activity of isobarbaloin and barbaloin was not found. The cathartic activity (ED50) of isobarbaloin in barbaloin positive rats was 19.2 mg/kg, nearly equal to that of barbaloin (19.5 mg/kg). Also, isobarbaloin administered orally was demonstrated to decompose to aloe-emodin-9-anthrone (active metabolite of barbaloin) as well as to barbaloin. Therefore, it is considered that the mechanism underlying the cathartic effect of isobarbaloin is the same as that of barbaloin.
authors.affiliation: School of Pharmaceutical Sciences, University of Shizuoka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ishii
authors.forename: Y
authors.initials: Y
authors.lastname: Takino
authors.forename: T
authors.initials: T
authors.lastname: Toyo'oka
authors.forename: H
authors.initials: H
authors.lastname: Tanizawa
mesh_terms: D000284:Administration, Oral; D000504:Aloe / Q000737:chemistry*; D000818:Animals; D000873:Anthracenes / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D002400:Cathartics / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D002851:Chromatography, High Pressure Liquid; D007420:Intestine, Large / Q000378:metabolism; D008297:Male; D010946:Plants, Medicinal; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000873:Anthracenes; D002400:Cathartics; C045601:barbaloin