In vivo metabolism of 11-hydroxy-.DELTA.8-tetrahydrocannabinol to two carboxylic acids and the effects of SKF 525-A, cobaltous chloride and phenobarbital on their formation in rats.
作者:KAZUHITO WATANABE、IKUO YAMAMOTO、KAZUTA OGURI、HIDETOSHI YOSHIMURA
DOI:10.1248/cpb.28.2154
日期:——
Two carboxylic acids were isolated as the major metabolites from the liver of rats injected with 11-hydroxy-Δ8-tetrahydrocannabinol (11-OH-Δ8-THC). One of the metab-olites was identified as Δ8-THC-11-oic acid, and the other was assumed to be 7-hydroxy-Δ8-THC-11-oic acid. The effects of SKF 525-A, cobaltous chloride and phenobarbital on the contents of these metabolites in the rat liver were studied. Pretreatment with SKF 525-A and cobaltous chloride resulted in significant decreases of the contents of these metabolites (by 73 and 70% for Δ8-THC-11-oic acid, and by 91 and 89% for 7-hydroxy-Δ8-THC-11-oic acid, respectively). On the other hand, the level of 7-hydroxy-Δ8-THC-11-oic acid was increased, but that of Δ8-THC-11-oic acid remained unchanged by pretreatment with phenobarbital. These results suggest that the metabolism of 11-OH-Δ8-THC to Δ8-THC-11-oic acid and 7-hydroxy-Δ8-THC-11-oic acid is mediated in part by the microsomal monooxygenase system in vivo.
注射11-羟基-Δ8-四氢大麻酚(11-OH-Δ8-THC)的大鼠肝脏中分离出两种羧酸作为主要代谢产物。其中一种代谢产物被确定为Δ8-THC-11-oic acid,另一种被认为是7-hydroxy-Δ8-THC-11-oic acid。研究人员研究了SKF 525-A、氯化钴和苯巴比妥对这些代谢产物在大鼠肝脏中的含量的影响。用SKF 525-A和氯化钴预处理后,这些代谢产物的含量显著降低(Δ8-THC-11-oic acid分别降低了73%和70%,7-hydroxy-Δ8-TH