RESUMO
We studied association of Oprm1 gene polymorphisms with signs of N-(1-phenethyl-4-piperidyl)propionanilide intoxication in rats. It was found that the rate of intoxication in laboratory animals depends on genetic features. A polymorphic variant rs105312806 of Oprm1 gene can be a possible marker of animal sensitivity to opioid receptor agonists. This hypothesis was supported by differences in the rats of intoxication signs such as time to lateral posture and sleep duration in homozygous rats carrying different alleles. In rats with AA genotype, the time to lateral posture was shorter by 1.3 times and sleep duration was longer by 3.5 times than in carriers of GG genotype.
Assuntos
Hipnóticos e Sedativos/farmacologia , Polimorfismo de Nucleotídeo Único/genética , Receptores Opioides mu/genética , Alelos , Animais , Genótipo , Masculino , Ratos , Receptores Opioides mu/antagonistas & inibidores , Receptores Opioides mu/metabolismo , Sono/efeitos dos fármacosRESUMO
Expression of genes encoding the individual subunits of ionotropic GABAA receptor was assessed after acute and chronic intoxication of rats with ethanol. The chronic 1-month-long exposure to ethanol signifi cantly decreased (by 38%) expression of Gabrb1 gene in the hippocampus. Acute exposure to ethanol elevated expression of genes Gabrb1 (by 1.7 times), Gabra1 (by 3.8 times), and Gabra4 (by 6.5 times), although it diminished expression of Gabra2 gene by 1.4 times. In preliminarily alcoholized rats, acute intoxication with ethanol enhanced expression of genes Gabrb1 and Gabra5 by 1.7 and 8.7 times, respectively. There was neither acute nor chronic effect of ethanol on expression of gene Gabra3.