title: [Effect of SH-reagents on aldehyde dehydrogenase activity of the rat liver].
abstract: SH-reagents: tetraethylthiuram disulphide (TETD), 5,5'-dithiobisnitrobenzoic acid (DTNB), p-chloromercurybenzoate (p-ChMB), N-ethylmaleimide (NEM) were studied for their effect on the aldehyde dehydrogenase activity of mitochondrion (isoenzymes I and II) and microsome (isoenzyme II) fractions of the rat liver. TETD is established to inhibit isoenzyme I and isoenzyme II activity of mitochondrial aldehyde dehydrogenase by 100 and 50%, respectively, and the microsomal enzyme activity by 20%. DTNB and NEM inhibit 30-50% of the activity in two isoforms of mitochondrial aldehyde dehydrogenase having no effect on the enzymic activity in microsomes; p-ChMB inhibits completely the activity of the enzyme under study both in the mitochondrial and microsomal fractions. A conclusion is drawn that SH-groups are very essential for manifestation of the catalytic activity in the NAD+-dependent aldehyde dehydrogenase from mitochondrial and microsomal fractions.
mesh_terms: D000444:Aldehyde Dehydrogenase / Q000037:antagonists & inhibitors*; D000818:Animals; D066298:In Vitro Techniques; D007527:Isoenzymes / Q000037:antagonists & inhibitors*; D008099:Liver / Q000201:enzymology*; D008862:Microsomes, Liver / Q000201:enzymology; D008930:Mitochondria, Liver / Q000201:enzymology; D051381:Rats; D013379:Substrate Specificity; D013439:Sulfhydryl Reagents / Q000494:pharmacology*
chemical_list: D007527:Isoenzymes; D013439:Sulfhydryl Reagents; D000444:Aldehyde Dehydrogenase
vernacular_title: Vliianie SH-reagentov na aktivnost' al'degiddegidrogenazy pecheni krys.