title: [Effect of the structure of the brassinosteroid side chain on monooxygenase activity of liver microsomes].
abstract: Possible pathways by which brassinosteroids affect the monooxygenase enzymatic system of mammalian liver microsomes, which is involved in the transformation of a broad spectrum of xenobiotics, were studied. The role of the structure of the side chain of brassinosteroids in the regulation of monooxygenase activity was studied using two natural compounds (24-epibrassinolide and 28-homobrassinolide) and two synthetic analogues, (22S, 23S-dihydroxy) stereoisomers. The results of this study show that brassinosteroids can directly influence the functioning of the microsomal enzymatic system. It was found that the degree of this influence depends on the side chain structure. This suggests the possibility of targeted modification of natural compounds to ensure the desired physiological effects.
authors.forename: A G
authors.initials: AG
authors.lastname: Sysa
authors.forename: P A
authors.initials: PA
authors.lastname: Kiselev
authors.forename: V N
authors.initials: VN
authors.lastname: Zhabinskiĭ
authors.forename: V A
authors.initials: VA
authors.lastname: Khripach
mesh_terms: D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases / Q000378:metabolism*; D060406:Brassinosteroids; D002777:Cholestanols / Q000737:chemistry* / Q000494:pharmacology; D002778:Cholestanones / Q000737:chemistry* / Q000494:pharmacology; D008297:Male; D008862:Microsomes, Liver / Q000187:drug effects* / Q000201:enzymology; D051381:Rats; D013237:Stereoisomerism; D013260:Steroids, Heterocyclic / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D060406:Brassinosteroids; D002777:Cholestanols; D002778:Cholestanones; D013260:Steroids, Heterocyclic; C070163:homobrassinolide; D001189:Aryl Hydrocarbon Hydroxylases; C023623:brassinolide