Résumé
Three proteinaceous pheromone families, the androgen-binding proteins (ABPs), the exocrine-gland secreting peptides (ESPs) and the major urinary proteins (MUPs) are encoded by large gene families in the Mus musculus and Rattus norvegicus genomes. The purpose of this article is to review what is known about the evolutionary histories of the the Abp gene family expansions in rodents and, where appropriate, to compare them to what is known of the expansions of the Mup and Esp gene families. The issues important to these histories are the extent of the gene family expansions, the timing of their expansions and the roles played by selection, gene conversion and non-allelic homologous recombination (NAHR). I also compare and contrast the evolutionary histories of all three mouse gene families in light of the proposed functions of their pheromones in mouse communication.
Résumé
Objective To investigate the effects of different doses of alcohol on the synthesis of testosterone and the expression of androgen binding protein(ABP)mRNA in rat testis.Methods Forty male Wistar rats were randomly divided into 4 groups(10 rats each group)and received either distilled water(control group)or alcohol(alcohol-fed groups)for 5 months.Alcohol was administered by garage with a single daily dose : 5 g/kg(large dose group),2.5 g/kg(middle dose group)and 0.5 g/kg(small dose group).Testosterone content was measured by ELISA.mRNA levels of peripheral-type benzodiazepine receptors(PBR),PPARct and ABP were assayed by RT-PCR.Results Compared with control group:(1)ethanol feeding with daily doses of 5 g/kg,2.5 g/kg and 0.5 g/kg significantly decreased testosterone levels by 31.13%(P0.05)respectively,indicating that ethanol might impair testosterone synthesis;(2) mRNA levels of PBR were decreased in all three ethanol-treated groups(all P