title: Evaluation of the differential in vivo toxic effects of ethanol and acetaldehyde on the hypothalamic-pituitary-gonadal axis using 4-methylpyrazole.
abstract: 4-Methylpyrazole (4-MP) blocks ethanol (ETOH) oxidation by inhibiting alcohol dehydrogenase (ADH). Because ADH has been identified and shown to be active in the testes, we examined the effect of ETOH + 4-MP in the ETOH-fed rat model. Weanling rats were divided into four groups of 15 rats each and fed a liquid diet: group I received ETOH (5% v/v) + 4-MP (1.34 mM); group II was pair-fed the diet containing only 4-MP and isocalorically matched to group I; group III received ETOH diet; and group IV was pair-fed isocalorically to match group III. Using two-way analysis of variance for nonorthogonal data, the results were analyzed to examine both ETOH and 4-MP as the main treatment and to test for interaction. Both ETOH and 4-MP produced significant main treatment effects with significant interaction on liver/body ratio, testes weight expressed as per cent of normal, and plasma luteinizing hormone levels, and without interaction on plasma testosterone concentrations.
mesh_terms: D000079:Acetaldehyde / Q000009:adverse effects*; D000426:Alcohol Dehydrogenase; D000429:Alcohol Oxidoreductases / Q000037:antagonists & inhibitors; D000818:Animals; D000431:Ethanol / Q000009:adverse effects*; D000077604:Fomepizole; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects*; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D009929:Organ Size / Q000187:drug effects; D011720:Pyrazoles / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013737:Testis / Q000187:drug effects*; D013739:Testosterone / Q000097:blood
chemical_list: D011720:Pyrazoles; D000431:Ethanol; D013739:Testosterone; D000077604:Fomepizole; D007986:Luteinizing Hormone; D000429:Alcohol Oxidoreductases; D000426:Alcohol Dehydrogenase; D000079:Acetaldehyde