[Investigation of the effect of the aqueous extract of the root of Prosopis farcta plant on the function of the isolated hearts of rats under ischemia - reperfusion condition]

Prosopis farcta plant is used traditionally in several parts of the country. Due to lack of scientific information on the cardiovascular effects of this plant, especially during ischemia - reperfusion and the importance of the issue, the present study was designed to investigate the effect of Prosopis farcta root extract on the isolated hearts of rats under ischemia-reperfusion condition. This experimental study included 58 rats which were divided into perfusion and ischemia-reperfusion groups. The hearts of the animals were isolated and then subjected to ischemia and reperfusion in Iangendorff setup, after baseline step. Parameters of cardiac function, including heart rate, left ventricular developed pressure [LVDP], rate pressure product [RPP] and coronary flow [CF] were assessed. The results showed that administration of aqueous extract of Prosopis farcta plant significantly reduced cardiac parameters including RPP [p=0.0242] and CF [p=0.01113] in perfusion group, and also exacerbated cardiac damage [RPP] induced by ischemia in the ischemic group compared to the control group [p= 0.0126]. Considering the inhibitory effect of Prosopis farcta root extract on cardiac function, this plant may have useful effect on lowering blood pressure, but owing to its undesirable effects following myocardial ischernia, its administration is not recommended in these cases. The present results were not consistent with previous reports on nitric oxide dependent vasodilatory effect of this plant, and investigation of the compounds of this plant in different regions of the country is recommended in the future studies

[Polymorphisms of prolactin gene in a native chicken population and its association with egg production]

The induction and regulation of broodiness is of the most important role of prolactin in avian species. The promoter region of the prolactin gene is an appropriate model for studying tissue-specific and hormonally-regulated activation of gene transcription. In this study, the association between prolactin promoter region alleles and egg production in Fars native chickens was investigated. In total, 100 laying hens, randomly selected from the flock of the Breeding Center for Fars Native Chicken, were genotyped for two single nucleotide polymorphisms [C-2161G and C-2402T], one 24-bp insertion-deletion at the site -358. The observed genotypic frequencies in the C-2161G site were CC [0.437], CG [0.435] and GG [0.101]. Two alleles were found for the SNP of C-2402T with frequency of 0.34 for T and 0.66 for C. The 24-bp insertion-deletion at the site -358 was shown to be polymorph in the studied sample, with the observed genotyping frequency of 0.417 in II, 0.457 in ID and 0.126 in DD. Significant relationship was found between the SNP[s] and insertion-deletion genotypes with egg production [P<0.01]