نتایج جستجو برای: sperm chromatin this article extracted from msc thesis
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Background: Cytoplasm and mitochondria are considered as the major origins of sperm ROS production. Sperm is prone to DNA damage by exposure to ROS or due impaired chromatin remodeling or low DNA protamination. Therefore, the aim of this study was to see if there is any association between impaired chromatin packaging and origin of ROS production. Materials and Methods: Cytosolic ROS, mitochond...
Background and Aims: Human cytomegalovirus (HCMV) can induce latency and evade the immune system. The latent virus can reactive later in older ages and due to immunosuppressive conditions. Sexually transmitted diseases and viruses can influence the male reproductive system, and members of the Herpesviridae family are one of these important viruses. Regarding the importance of herpesviruses, spe...
BACKGROUND CatSper genes are a novel family of four sperm-specific calcium channels, which indicate testis-specific expression patterns. Despite the crucial role of CatSper genes in the male reproduction, very little is known about the factors that regulate their expression. OBJECTIVE The objective of this study was to investigate the effects of vitamin E treatment on the expression of CatSpe...
Background & Aims: Today, with lifestyle changes, the tendency to use packaged food, street food, and fast food has increased, and most of them contain Acrylamide. One of the most important side effects of Acrylamide is toxicity in the reproductive system. In this study, the long-term effects of Acrylamide on in Vitro Fertilization (IVF) and sperm parameters were investigated. Materials & ...
the aim of this study was to investigate the effect of adding different levels of zinc sulfate in semen extender on bovine sperm quality during cryopreservation. semen was collected from 4 holstein bull twice a week and the proper samples were pooled. semen were allocated to four extender treatments consisted of 0, 50, 100, 150 µm of zinc sulfate in 5 replicates and then, were frozen. post-thaw...
this study focuses on jane austens representation of her heroines in two of her novels: pride and prejudice, and mansfield park. i have concentrated only on a single idea: how jane austen takes her heroines through a course of psychogical reformation to which almost everything else in her novel is subsidiary. although i have discussed only pride and prejudice, we can trace austens carefully pla...
Changes of chromosomal basic proteins of rats have been followed during transformation of spermatids into spermatozoa in the testis and during maturation of spermatozoa in the epididymis. Rat testis chromatin has been fractionated on the basis of differing sensitivity to shearing, yielding a soluble fraction and a condensed fraction. The sperm histone is found in the condensed fraction. Somatic...
a major concern in the last few years has been the fact that the cultural centers are keeping distance with what they have been established for and instead of reproducing the hegemony, they have turned into a place for resistance and reproduction of resistance against hegemony. because the cultural centers, as urban public spaces in the last two decades, have been the subject of ideological dis...
DNA compaction with protamines in sperm is essential for successful fertilization. However, a portion of sperm chromatin remains less tightly packed with histones, which genomic location and function remain unclear. We extracted and sequenced histone-associated DNA from sperm of nine ejaculates from three bulls. We found that the fraction of retained histones varied between samples, but the var...
different methods have been used to evaluate the beneficial effect of varicocelectomy; these include semen parameters and pregnancy rate. due to high biological variability of semen parameters, sperm functional tests have been considered as an efficient end point in assessment of fertility. therefore, the aim of this study was to evaluate the effect of varicocelectomy on semen parameters and sp...
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