Sildenafil is widely used for the treatment of erectile dysfunction with few studies are available on the protective role of propolis against its reproductive toxicity. The present study aims to investigate the hormonal biochemical and histomorphometric alterations induced in the testicular tissues by sildenafil overdoses. Four groups of rabbits were exposed to sildenafil with or without propol...

The physiological function of spermatogenesis in Caenorhabditis elegans, Drosophila melanogaster and mammals is to produce spermatozoa (1n, haploid) that contain only half of the genetic material of spermatogonia (2n, diploid). This half number of chromosomes from a spermatozoon will then be reconstituted to become a diploid cell upon fertilization with an egg, which is also haploid. Thus, gene...

infertility is a relatively common problem among couples, and gossypol, a yellowishpigment detected in cottonseed, is one cause.adult nmri mice (25-35 gr) were used in this study. the animals were kept in standard conditionswith a dark and light cycle of 12:12, controlled humidity and temperature, food and water were availableadlibitium.gossypol was dissolved in ethanol and diluted by sunflower...

conclusions it seems that the preventive effects of rutin against damages caused by ida can be attributed to its ability to reduce apoptosis, which may be mediated by underexpression of caspase3 and overexpression of bcl2 genes. also, it could increase the expression of dazl that may be important in spermatogenesis. methods in the current experimental study, balb/c mice were divided into 8 grou...

Spermatogenesis process during which the male germ cells are produced at each stage of the disorder, it can lead to infertility. The aim of this study was to evaluate the effect of fennel and yarrow on spermatogenesis in adult micereceiving chemotherapy is cyclosporine. For this study, 32 male Wistar rats with an average weight of 20 ± 200 g were randomly divided into four groups (control, cycl...

Spermatogenesis is regulated by genetic and epigenetic factors. However, the genes signaling pathways mediating human spermatogenesis remain largely unknown. Here, we have for first time explored expression, function, mechanism of glutathione peroxidase 3 (GPx3) in controlling proliferation apoptosis spermatogonial stem cells (SSCs). We found that GPx3 was expressed SSCs. Notably, revealed knoc...

BACKGROUND & OBJECTIVES The study was taken up to define criteria of normality for meiosis by assessing the frequency of meiotic prophase cell types, the frequency of pachytene substage in normal and abnormal spermatogenesis and to determine what synaptonemal complex. METHODS A quantitative and qualitative analysis of the first meiotic prophase was performed in 10 patients presenting with non...

during hibernation period from mid october to late march, we removed testis of laudakia caucasia. based on histological and statistical analyses we obtained two phases in spermatogenesis in this lizard as follows: (a) from october to december, in which the spermatogenesis is inactive and (b) from january to march, in which the spermatogenesis is active. spermatogenesis during late hibernation o...

Effect of ginger (Zingiber officinale R.) on metiram-inhibited spermatogenesis and induced apoptosis in albino miceSaber A. Sakr, Gamal M. Badawy

I investigated the seasonal testicular histology and acystic lobular spermatogenesis in Western Lesser Siren, Siren intermedia nettingi, from periodic sampling of this salamander over a span 21 yr (1994-2015) northeastern Arkansas. My results include following general findings: 1) largest lobules occurred primarily January-February during spermiogenesis spermatozoa maturation; 2) regression spe...