Protein Information

Name alanine aminotransferase
Synonyms AAT1; AAT1; GPT; ALT 1; ALT1; Alanine aminotransferase; Alanine aminotransferase 1; GPT 1…

Compound Information

Name cyanamide
CAS cyanamide

Reference List

PubMed Abstract RScore(About this table)
3677417 Solomon LR: Studies on the mechanism of acetaldehyde-mediated inhibition of rat liver transaminases. Clin Chim Acta. 1987 Sep 30;168(2):207-17.

Incubation of mitochondria-depleted rat liver homogenates with 5 mmol/l acetaldehyde at 37 degrees C for 1 h inhibited both aspartate and alanine aminotransferases by 30%.
Inhibition was prevented by decreasing temperature to 4 degrees C or by preincubating homogenates with cyanate but was unaffected by cyanamide and methylpyrazole which block acetaldehyde oxidation and reduction respectively.
1(0,0,0,1) Details
2886987 Penttila KE, Makinen J, Lindros KO: Allyl alcohol liver injury: suppression by ethanol and relation to transient glutathione depletion. Pharmacol Toxicol. 1987 May;60(5):340-4.

On the other hand, attempts to potentiate the toxicity of acrolein by the aldehyde dehydrogenase inhibitor cyanamide enhanced only the release of alanine aminotransferase.
32(0,1,1,2) Details
10803789 Tamai H, Yokoyama A, Okuyama K, Takahashi H, Maruyama K, Suzuki Y, Ishii H: Comparison of cyanamide and disulfiram in effects on liver function. . Alcohol Clin Exp Res. 2000 Apr;24(4 Suppl):97S-99S.

Serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels obtained at 0, 4, 8, and 12 weeks of administration of each aversive drug were compared between the two alcoholic groups.
1(0,0,0,1) Details
3508430 Younes M, Strubelt O: Alcohol-induced hepatotoxicity: a role for oxygen free radicals. Free Radic Res Commun. 1987;3(1-5):19-26.

Perfusion of isolated rat livers with ethanol at a concentration of 2 g/l (%o) resulted in a release of glutamate-pyruvate-transaminase (GPT) and sorbitol dehydrogenase (SDH) into the perfusate as markers of toxicity.
Inhibition of alcohol dehydrogenase by 4-methylpyrazole or of aldehyde dehydrogenase by cyanamide totally abolished ethanol hepatotoxicity despite of a severalfold increase in acetaldehyde concentration in the perfusate.
1(0,0,0,1) Details
3663401 Solomon LR: Evidence for the generation of transaminase inhibitor (s) during ethanol metabolism by rat liver homogenates: a potential mechanism for alcohol toxicity. Biochem Med Metab Biol. 1987 Aug;38(1):9-18.

When homogenates were incubated at 37 degrees with 50 mM ethanol for 1 hr, alanine aminotransferase decreased by 20%, while aspartate aminotransferase was unchanged.
Cyanamide, an aldehyde dehydrogenase inhibitor, had little effect on ethanol-mediated transaminase inhibition.
1(0,0,0,1) Details
2886311 Rikans LE: The oxidation of acrolein by rat liver aldehyde dehydrogenases. Drug Metab Dispos. 1987 May-Jun;15(3):356-62.

The metabolism of acrolein by low Km aldehyde dehydrogenase activities was markedly depressed in mitochondrial or cytosolic fractions from rats pretreated with cyanamide (2 mg/kg for 1 hr) or disulfiram (100 mg/kg for 24 hr).
Hepatotoxicity was assessed on the basis of elevated serum alanine aminotransferase and sorbitol dehydrogenase activities and the loss of microsomal cytochrome P-450.
1(0,0,0,1) Details