نتایج جستجو برای: ascending testis
تعداد نتایج: 39705 فیلتر نتایج به سال:
Background: The study of specific genes expressed in the testis is important to understanding testis development and function. Spermatogenesis is an attractive model for the study of gene expression during germ cell differentiation. Spermatogenesis associated-19 (Spata-19) is a recently-identified important spermatogenesis-related gene specifically expressed in testis. Its protein product is in...
Background: Male infertility is responsible for approximately 50% of infertility in the world. Reactive oxygen species (ROS) is one of the causative agents of infertility in males which effects on sperm quality and function. In this study, the effects of oxidative stress induced by tertiary-butyl hydroperoxide (TBHP) were investigated on sperm quality, testis tissue and miRNAs expression. Mater...
A characteristic set theory for partial difference polynomial systems is proposed. We introduce the concept of coherent and regular ascending chains and prove that a partial difference ascending chain is the characteristic set of its saturation ideal if and only if it is coherent and regular. This gives a method to decide whether a polynomial belongs to the saturation ideal of an ascending chai...
background fluoxetine (flx), a selective serotonin reuptake inhibitor, is widely used in the treatment of neurological disorders. however, its application carries the risk of adverse reactions, including reproductive toxicities. grape seed is highly regarded for its pharmacological activities, specifically its antioxidant properties. objectives this study was designed to evaluate whether hydroa...
introduction: anabolic – androgenic steroids (aas) are used at high doses by athletes for improving athletic ability, muscle mass and physical appearance. unfortunately, the abuse of these agents has been significantly increased. it has been established that exercise and high doses of aas may influence the hypothalamic-pituitary-gonadal axis, which can in turn affect testicular apoptosis and ma...
in this review, we aim to examine the effect of extrinsic and intrinsic factors on spermatogenesis process taking into account a complex signaling pathway. primarily, it is suggested that retinoic acid (ra) has a vital function in spermatogenesis process and it is considered to be essential for completion of spermatogonia into mature spermatozoa. in the present review, the key effects of retino...
background: heroin as opium is being used in two pure and impure forms with known disastrous effects on different body organs including genital system. the aim of this study was to determine the changes in testosterone secretion, the percentage of fertility, changes of the body and testis weight, and gonado somatic index in mice (ballb/c). materials and methods: a total of 90 adult male and fem...
cyclophosphamide (cp) is extensively used as an antineoplastic agent for the treatment of various cancers, as well as an immunosuppressive agent. however, despite its wide spectrum of clinical uses, cp is known to cause several adverse effects including reproductive toxicity. crataegus monogyna is one of the oldest pharmaceutical plants that have been shown to be cytoprotective by scavenging fr...
Sertoli cells play a significant role in regulating fetal testis compartmentalization to generate testis cords and interstitium during development. The Sertoli cell Wilms' tumor 1 (Wt1) gene, which encodes ~24 zinc finger-containing transcription factors, is known to play a crucial role in fetal testis cord assembly and maintenance. However, whether Wt1 regulates fetal testis compartmentalizati...
Background: Undescended testes are a common problem, affecting up to 3% of newborn males. The goals of orchiopexy in humans are to provide adequate scrotal fixation, to prevent recurrent torsion of the testis and spermatic cord or ascent of the testis, and to achieve these goals with minimal trauma to the testis. The best method of achieving fixation remains controversial. Purpose: The aim of o...
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