Drosophila spermatogenesis is an ideal system to study the effects of changes in lipid composition, because spermatid elongation and individualization requires extensive membrane biosynthesis and remodelling. The bulk of transcriptional activity is completed with the entry of cysts into meiotic division, which makes post-meiotic stages of spermatogenesis very sensitive to even a small reduction...

Recent large-scale transcriptional profiling experiments of mammalian spermatogenesis using rodent model systems and different types of microarrays have yielded insight into the expression program of male germ cells. These studies revealed that an astonishingly large number of loci are differentially expressed during spermatogenesis. Among them are several hundred transcripts that appear to be ...

cinnamon has many therapeutic effects, such as its impact the increase of sexual ability. this experiment was conducted to determine the effect of cinnamon extract on spermatogenesis and hormonal axis of pituitary gonad in mice. the animals used in this study are male adult mice (weighing about 30-34 g and 9-10 weeks old). cinnamon was purchased from one of the most valid shops in jahrom and th...

background: olive ( olea europea ), from the oleaceae family, is known as a phytoestrogen plant compound, containing lignans and phenolic compounds. some studies have shown phytoestrogens to have spermatogenesis-decreasing effects. objective: the present study investigated the effects of a hydro-alcoholic extract of olive fruit on reproductive argons in male rats. materials and methods: the hyd...

Mammalian spermatogenesis is a highly regulated multistage process of sperm generation. It is hard to uncover the real function of a testis specific gene in vitro since the in vitro model is not yet mature. With the development of the CRISPR/Cas9 (Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated 9) system, we can now rapidly generate knockout mouse models of testis sp...

Gh plays important roles in development, somatic growth and gametogenesis in vertebrates. To determine the physiological role of Gh in reproduction in male teleosts, the expression of genes encoding Gh and the two Gh receptors (Ghrs) during spermatogenesis, and the action of Gh in vitro was examined using the Japanese eel (Anguilla japonica). gh, ghr1 and ghr2 mRNA transcripts were detected in ...

OBJECTIVE Tyrosine kinase inhibitors may have deleterious effects on spermatogenesis or folliculogenesis, resulting in male or female subfertility. The aim of this study is to determine the effect of nilotinib, which is used routinely to treat chronic myeloid leukemia, on spermatogenesis and folliculogenesis by using histopathological parameters. MATERIALS AND METHODS Ten male and ten female ...

Testicular Sertoli cells (Sc) are main somatic component of seminiferous tubules that govern the differentiation of germ cells (Gc) and provide them physical support. Sc are the target of follicle stimulating hormone (FSH) and testosterone (T) which are known to regulate spermatogenesis. FSH and T levels in human and sub-human male primates remain high during infancy (4-6 months post birth), si...

Experimental work on the maintenance and the restoration of spermatogenesis after hypophysectomy by -the administration of androgens has been limited to the smaller laboratory animals (rats, mice, guinea-pigs, rabbits, ground-squirrels, and pigeons). Rats have been the animals most commonly used. In them the period of time during which spermatogenesis has been maintained following hypophysectom...

BACKGROUND The Chinese mitten crab Eriocheir sinensis belongs to the Class Crustacea, Decapoda, Brachyura. The spermatozoon of this species is of aflagellated type, it has a spherical acrosome surrounded by the cup-shaped nucleus, which are unique to brachyurans. For the past several decades, studies on the spermatogenesis of the mitten crab mainly focus on the morphology. Compared with the ext...