نتایج جستجو برای: sperm nuclear maturity

تعداد نتایج: 300318  

2015
Elisabeth Pasch Jana Link Carolin Beck Stefanie Scheuerle Manfred Alsheimer

LINC complexes are evolutionarily conserved nuclear envelope bridges, physically connecting the nucleus to the peripheral cytoskeleton. They are pivotal for dynamic cellular and developmental processes, like nuclear migration, anchoring and positioning, meiotic chromosome movements and maintenance of cell polarity and nuclear shape. Active nuclear reshaping is a hallmark of mammalian sperm deve...

Farzad Rajaei Farzaneh Zamansoltani Homayoun Abbasi Kamran Ghaedi Marziyeh Tavalaee Mohammad Hossein Nasr Esfahani Mohammad Reza Deemeh Nazem Ghasemi Shahnaz Razavi Somayeh Tanhaei Zahra Mirhosseini

Background Heat shock protein A2 (HSPA2) is correlated with sperm maturity and function. Therefore, dysfunctional expression of this gene results in abnormal spermatogenesis. On the other hand, DNA damage in spermatozoa is considered to be an important cause of male infertility, and the presence of sperm with DNA fragmentation and chromatin abnormalities in human ejaculates is well documented, ...

Journal: :cell journal 0

introduction: during spermiogendsis, sperm chromatin histones are replaced by protamine. after fertilization, the sprem nucleus is decondenced by glutathione (gsh). in this survey, we study the effect of various concentrations of gsh on human in vitro sperm decondensation. material and methods: after preparation and analysis of semen samples, sperm pellet was washed by ham's f-10 medium twice a...

Journal: :Fertility and sterility 2009
Reda Z Mahfouz Rakesh K Sharma Tamer M Said Juris Erenpreiss Ashok Agarwal

OBJECTIVE To examine the relationship among sperm apoptosis, sperm chromatin status, and DNA ploidy in different sperm fractions. DESIGN Prospective study. SETTING Reproductive research center in a tertiary care hospital. INTERVENTION(S) Sperm prepared by density gradient were evaluated for sperm count, motility, apoptosis, and sperm chromatin assessment. MAIN OUTCOME MEASURE(S) Sperm c...

Background & Aims: The atrazine is one of the most commonly applied herbicide in the world. The main purpose of the current study was to investigate the detrimental effects of ATR on male reproductive system. Materials & Methods: In this experimental study, eighty male rats were used. The rats in control group received 0/2ml corn oil and in experimental groups received 75, 150 and 300 mg/kg b....

Introduction: Aflatoxin is the most important mycotoxin toxicity and can enter the animal or human reproductive systems and cause some problems in relation to semen quality and fertility decline. The aim of this study was to investigate the effect of aflatoxin on histological structure of the testes and sperm characteristics and cellular targets in spermatogenic compartment and blood level of t...

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