Background: Telomeres play a dramatic role in sperm pronuclei formation and subsequently successful fertilization. The H2B family, member W, testis specific (H2BFWT) gene encodes a testis specific histone that colocalized with telomeric sequences and interfere in the dynamic rearrangement of telomeres at late stages of spermatogenesis. H2BFWT is essential for transmission of the telomeric chrom...

Background: During the later stages of spermatogenesis, spermatid nuclear remodeling and condensation are associated with histone modifications and the sequential displacement of histones by transition proteins and then by protamines. In humans, approximately 15% of the sperm DNA remains packaged by histones in sequence-specific areas. The histone variant H2B, member W, testis-specific (H2BFWT)...

Testicular cell apoptosis is associated with impaired spermatogenesis. It has been reported that Asiatic acid (AA) may suppress apoptosis. However, little is known about the effect of AA on high-fat diet (HFD)-induced impairment of spermatogenesis. The aim of the present study was to determine whether AA protects against HFD-induced impairment of spermatogenesis. Sprague-Dawley rats were random...

The azoospermia factor c (AZFc) region on the Y chromosome is a genetically dynamic locus in the human genome. Numerous genomic rearrangements, including deletion, duplication and inversion, have been identified in AZFc. The complete deletion of AZFc can cause spermatogenic impairment. However, the roles of partial AZFc deletions (e.g. b2/b3 deletion) in spermatogenesis are controversial and va...

Background: The complications of diabetes are the major problems that occur in diabetic patients. It has been reported that, insulin insufficiency and the impairment of regulatory action of this hormone on Leydig and Sertoli cells have an important role in testicular alterations. Testicular disorders and change in normal spermatogenesis is one of the consequences of diabetes. This study was des...

Controversies and debates still prevail in current literature concerning the role of bacterial infection male infertility. A handful studies have discovered a correlation between bacteria azoospermia condition which discharge is utterly devoid spermatozoa. In line with this, present study was designed to evaluate influence Escherichia coli on spermatogenesis. single dose (108 cfu/20ul) uropatho...

Estrogen is synthesized in the testis, both in Leydig cells and seminiferous epithelium, and its importance in spermatogenesis is highlighted by the phenotype of the aromatase knockout (ArKO) mouse. These mice are unable to synthesize endogenous estrogens. The males develop postmeiotic defects by 18 wk of age. We hypothesized that maintenance of spermatogenesis in younger animals may be mediate...

Connexin43 (Cx43) is abundantly expressed in mammalian testes and implicated in the regulation of cell-to-cell interaction between germ cells and Sertoli cells, which is essential to the normal process of spermatogenesis. In the present study, we investigated the relation between Cx43 expression and the degree of spermatogenesis in infertile human testes. Immunohistochemical analysis of Cx43 wa...

BACKGROUND Partial AZFc deletions related to testis-specific gene families are common mutations of the Y chromosome, but their contribution to spermatogenic impairment is still unresolved, and the risk factors for the formation of the deletions remain unknown. With this in mind, we investigated the possible association between Y chromosome haplogroups and predisposition to partial AZFc deletion...