نتایج جستجو برای: steroidogenic acute regulatory star
تعداد نتایج: 749430 فیلتر نتایج به سال:
Backgr ound and Objective: To examine the acute effects of propylthiouracil (PTU) on corticosterone release by rat adrenal Zona Fasciculata Reticularis (ZFR) cells. Materials and Methods: Male rats were infused with alkaline saline or PTU (10 mg kgG1) via right jugular catheter. The blood samples were collected at 0, 30, 60, 120, 180 and 240 min after infusion. Rat ZFR cells were treated with P...
Endometriosis is a common, chronic and estrogen-dependent gynaecological disorder associated with pelvic pain and infertility. In addition to, or perhaps as a consequence of, immune, environmental and genetic factors, endometriotic lesions show high estradiol (E(2)) biosynthesis and low E(2) inactivation compared with normal endometrium. Current medical therapies of pain, which aim to lower cir...
De novo synthesis of the steroidogenic acute regulatory protein (StAR) in response to trophic hormonal stimulation of steroidogenic cells is required for the delivery of cholesterol from the mitochondrial outer membrane to the mitochondrial inner membrane and the cytochrome P450 side-chain cleavage enzyme. StAR expression is transcriptionally regulated by cAMP-mediated mechanisms, and we have i...
Leydig cells secrete testosterone, which is essential for male fertility and reproductive health. Stress increases the secretion of glucocorticoid (corticosterone, CORT; in rats), which decreases circulating testosterone levels in part through a direct action by binding to the glucocorticoid receptors (NR3C1) in Leydig cells. The intratesticular CORT level is dependent on oxidative inactivation...
Intracellular cAMP and Ca(2+) are involved in the regulation of steroidogenic activity in Leydig cells, which coordinate responses to luteinizing hormone (LH) and human chorionic gonadotropin (hCG). However, the identification of Ca(2+) entry implicated in Leydig cell steroidogenesis is not well defined. The objective of this study was to identify the type of Ca(2+) channel that affects Leydig ...
The aim of the present study was to identify the sites of the inhibitory action of TNFalpha (tumor necrosis factor alpha) on LH/hCG-stimulated testosterone formation. By using cultured porcine Leydig cells as a model, TNFalpha was shown to inhibit testosterone secretion when testicular cells were stimulated with hCG but not when incubated with 22R-hydroxycholesterol (a cholesterol substrate der...
This study was designed to evaluate the effect of acute (2 h daily) and repeated (2 h daily for 2 or 10 consecutive days) immobilization stress (IMO) on: 1) the steroidogenic machinery homeostasis; 2) cAMP signaling; and the expression of receptors for main markers of 3) adrenergic and 4) glucocorticoid signaling in Leydig cells of adult rats. The results showed that acute IMO inhibited steroid...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید