All trans retinoic acid (ATRA) mediated modulation of N-methyl D-aspartate receptor (NMDAR) and Kruppel like factor 11 (KLF11) expressions in the mitigation of ethanol induced alterations in the brain

Neurochemistry International
Saritha S NairM Indira

Abstract

Damaging effects that chronic ethanol exposure causes to the brain and the neurons are well documented. Ethanol and its toxic metabolites increase the oxidative stress in brain. Chronic exposure to ethanol leads to upregulation of N-methyl D-aspartate receptors (NMDAR) and also activates Kruppel like factor 11 (KLF11) mediated death cascade and thereby neurodegeneration. Ethanol depletes vitamin A stores. But supplementation of vitamin A exacerbates ethanol induced toxicity since alcohol and its metabolites are competitive inhibitors of the enzymes involved in the metabolism of vitamin A. Hence, in this study we investigated the impact of co-administration of ethanol and all trans retinoic acid (ATRA), active metabolite of vitamin A, on ethanol induced alterations to the brain. Male Sprague Dawley rats, adolescent, were grouped as follows and maintained for 90 days. I - Control, II - Ethanol (4 g/kg b.w.), III - ATRA (100 µg/kg b.w.), IV - Ethanol (4 g/kg b.w.), +ATRA (100 µg/kg b.w.). Oxidative stress and the mRNA expression of various receptors for the neurotransmitter involved in glutamergic, serotonergic and gabaergic pathways were studied in the brain homogenate. Ethanol treatment was shown to decrease brain weight and it ...Continue Reading

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