نتایج جستجو برای: گیرنده kiss1
تعداد نتایج: 6693 فیلتر نتایج به سال:
Stress elicits activation of the hypothalamic-pituitary-adrenal axis, which leads to enhanced circulating glucocorticoids, as well as impaired gonadotropin secretion and ovarian cyclicity. Here, we tested the hypothesis that elevated, stress-levels of glucocorticoids disrupt ovarian cyclicity by interfering with the preovulatory sequence of endocrine events necessary for the LH surge. Ovarian c...
Hypothalamic kisspeptin neurons integrate and translate cues from the internal and external environments that regulate gonadotropin-releasing hormone (GnRH) secretion and maintain fertility in mammals. However, the intracellular signaling pathways utilized to translate such information into changes in kisspeptin expression, release, and ultimately activation of the kisspeptin-receptive GnRH net...
This review aims at synthesizing the most relevant information regarding the neuroendocrine circuits controlling reproduction, mainly gonadotropin release, in teleost fish. In teleosts, the pituitary receives a more or less direct innervation by neurons sending projections to the vicinity of the pituitary gonadotrophs. Among the neurotransmitters and neuropeptides released by these nerve ending...
The brain mechanism regulating gonadotropin-releasing hormone (GnRH)/luteinizing hormone (LH) release is sexually differentiated in rodents. Kisspeptin neurons in the anteroventral periventricular nucleus (AVPV) have been suggested to be sexually dimorphic and involved in the GnRH/LH surge generation. The present study aimed to determine the significance of neonatal testicular androgen to defem...
Kisspeptins are a family of overlapping neuropeptides encoded by the Kiss1 gene that regulate the mammalian reproductive axis by a central action in the hypothalamus to stimulate GnRH release. Kisspeptins and their receptor (GPR54 also called KISS1R) are also expressed in the testes but a functional role in this tissue has not been confirmed. We examined which cell types in the testes expressed...
Kisspeptin has been demonstrated to affect reproductive cyclicity and the attainment of puberty in multiple species, presumably through its actions on gonadotropin releasing hormone luteinizing hormone. administration causes increased plasma concentrations LH pigs, sheep, rats. The objective this experiment was evaluate changes hypothalamic kisspeptin system throughout estrous cycle gilts. Estr...
Objective The inhibitory effects of Morphine and the stimulatory influence of kisspeptin signaling have been demonstrated on GnRH/LH release. Hypothalamic kisspeptin is involved in relaying the environmental and metabolic information to reproductive axis. In the present study the role of kisspeptin/GPR54 signaling system was investigated on relaying the inhibitory effects of morphine on LH horm...
ناباروری ناتوانی زوجین در آبستنی (قطع نظر از علل آن) پس از طی یک سال از مقاربت های متوالی و بدون بهره گیری از روش های کنترل آبستنی می باشد. ابتلای به ناباروری می تواند موجب ایجاد تنش های روحی ـ اجتماعی ـ اقتصادی به افراد نابارور و اجتماع شان گردد. به طور کلی، انتظار می رود که در جهان یک هفتم زوجین دچار مشکلات باروری باشند. شیوع ناباروری در اغلب کشورها مشابه هم بوده و مستقل از سطح توسعه یافتگی ک...
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