Are steroids obligatory mediators of luteinizing hormone/human chorionic gonadotropin-triggered resumption of meiosis in mammals?

abstract：:Perifused anterior hemipituitaries from one male and 4 female monkeys released GH and PRL in a pulsatile pattern, with mean +/- SE interpulse intervals of 8.2 +/- 0.4 and 8.5 +/- 0.3 min, as determined by a cycle detection computer algorithm. Mean hormone concentrations in the perifusate fractions collected at 2-min i...

journal_title：Endocrinology

authors： Stewart JK,Clifton DK,Koerker DJ,Rogol AD,Jaffe T,Goodner CJ

更新日期：1985-01-01 00:00:00

abstract：:CRF dose-dependently enhanced corticosterone (B) secretion by rat adrenal slices including both cortex and medulla. Conversely, CRF did not exert any B response by fragments of adrenocortical autotransplants, which are completely deprived of chromaffin tissue. However, autotransplant quarters exhibited a dose-dependen...

journal_title：Endocrinology

authors： Andreis PG,Neri G,Mazzocchi G,Musajo F,Nussdorfer GG

更新日期：1992-07-01 00:00:00

abstract：:PTH upregulates the expression of the receptor activator of nuclear factor κB ligand (Rankl) in cells of the osteoblastic lineage, but the precise differentiation stage of the PTH target cell responsible for RANKL-mediated stimulation of bone resorption remains undefined. We report that constitutive activation of PTH ...

journal_title：Endocrinology

authors： Ben-awadh AN,Delgado-Calle J,Tu X,Kuhlenschmidt K,Allen MR,Plotkin LI,Bellido T

更新日期：2014-08-01 00:00:00

abstract：:Tumor necrosis factor-alpha (TNF alpha), a product of activated monocytes, induces tissue wasting in certain solid tumors in vivo and in in vitro model systems. Recent studies indicate that TNF alpha also regulates cell replication and expression of differentiated function in a variety of nonneoplastic cell systems. S...

journal_title：Endocrinology

authors： Centrella M,McCarthy TL,Canalis E

更新日期：1988-09-01 00:00:00

abstract：:The contributions of estradiol and testosterone to atherosclerotic lesion progression are not entirely understood. Cross-sex hormone therapy (XHT) for transgender individuals dramatically alters estrogen and testosterone levels and consequently could have widespread consequences for cardiovascular health. Yet, no prec...

journal_title：Endocrinology

authors： Goetz TG,Mamillapalli R,Sahin C,Majidi-Zolbin M,Ge G,Mani A,Taylor HS

更新日期：2018-02-01 00:00:00

abstract：:Female rats were ovariectomized and either sham-pinealectomized or pinealectomized on day 24 of age and exposed to a photoperiod of 12 h light: 12 h dark. In vivo and in vitro measures of adrenocortical function were made at 6, 7, and 8 weeks of age (18, 25, and 32 days post-pinealectomy, respectively). Pinealectomy d...

journal_title：Endocrinology

authors： Ogle TF,Kitay JI

更新日期：1976-01-01 00:00:00

abstract：:MCRs of testosterone (T) and 5 alpha-dihydrotestosterone (DHT) were determined in the morning and evening in four chronically chaired adult rhesus monkeys (Macaca mulatta) by means of steady state infusion of [4-14C]testosterone and [1,2-3H]dihydrotestosterone. Morning and evening MCRs were comparable for both T and D...

journal_title：Endocrinology

authors： Sholl SA,Toivola PT,Robinson JA

更新日期：1979-08-01 00:00:00

abstract：:Purinergic G protein-coupled receptors (P2YR) and ion-conducting receptor-channels (P2XR) are present in the pituitary. However, their identification, expression within pituitary cell subpopulations, and the ability to elevate intracellular Ca2+ concentration ([Ca2+]i) in response to ATP stimulation were incompletely ...

journal_title：Endocrinology

authors： Koshimizu TA,Tomić M,Wong AO,Zivadinovic D,Stojilkovic SS

更新日期：2000-11-01 00:00:00

abstract：:IGF-I and IGF-II play important roles in growth and development via interactions with cell-surface receptors; however, in nature, IGFs are sequestered by at least six soluble, high-affinity IGF-binding proteins (IGFBPs), namely IGFBPs 1-6. Herein, we demonstrate that the stromal cell-derived extracellular matrix-degra...

journal_title：Endocrinology

authors： Fowlkes JL,Serra DM,Bunn RC,Thrailkill KM,Enghild JJ,Nagase H

更新日期：2004-02-01 00:00:00

abstract：:Fasting in rodents is characterized by decreases in serum T4 and T3 levels but no compensatory increase in serum TSH level. The types 1 and 2 deiodinases (D1 and D2) are postulated to play key roles in mediating these changes. However, serum T4 and T3 levels in fasted 5'-deiodinase-deficient mice decreased by at least...

journal_title：Endocrinology

authors： Galton VA,Hernandez A,St Germain DL

更新日期：2014-08-01 00:00:00

abstract：:Testes of 29-35-day-old rats were separated into seminiferous tubules and interstitial tissue by collagenase treatment and examined by incubation studies with radioactive substrates. The activity of testosterone 5alpha-reductase/g protein in the interstitial tissue was 37 times greater than that in the tubules. The si...

journal_title：Endocrinology

authors： Yoshizaki K,Matsumoto K,Samuels LT

更新日期：1978-03-01 00:00:00

abstract：:Homologous anterior pituitaries grafted under the kidney capsule in hypophysectomized rats were studied 30 days after transplantation. Some cells maintained the ultrastructural features peculiar to the various cell types of normotopic glands, while the others were characterized by few, small, dense granules, spherical...

journal_title：Endocrinology

authors： Zanini A,Giannattasio G,De Camilli P,Panerai AE,Müller EE,Meldolesi J

更新日期：1979-01-01 00:00:00

abstract：:A primary culture system has been established for rainbow trout corpuscles of Stannius (CS). A RIA has also been developed to monitor and characterize the teleocalcin secreted by these cultures. The primary cultured CS cells actively synthesized and secreted teleocalcin for up to 39 days when maintained in amphibian a...

journal_title：Endocrinology

authors： Gellersen B,Wagner GF,Copp DH,Friesen HG

更新日期：1988-08-01 00:00:00

abstract：:Altered leptin action has been implicated in the pathophysiology of heart failure in obesity, a hallmark of which is extracellular matrix remodeling. Here, we characterize the direct influence of leptin on matrix metalloproteinase (MMP) activity in primary adult rat cardiac fibroblasts and focus on elucidating the mol...

journal_title：Endocrinology

authors： Schram K,Ganguly R,No EK,Fang X,Thong FS,Sweeney G

更新日期：2011-05-01 00:00:00

abstract：:The DNA binding protein nuclear factor-kappaB (NF-kappaB) is a transcription factor translocated from the cytosol to the nucleus in response to stressors. Here we determined whether the known ability of alcohol to activate the hypothalamic-pituitary axis was mediated by NF-kappaB, tested the hypothesis that this pheno...

journal_title：Endocrinology

authors： Lee S,Rivier C

更新日期：2005-04-01 00:00:00

abstract：:Ovarian cancer in women is a complex and deadly disease, where the molecular events that initiate and control tumor formation remain poorly defined. Therefore, mouse models provide one approach for determining the mechanisms by which specific oncogenic factors cause ovarian surface epithelial cell and granulosa cell t...

journal_title：Endocrinology

authors： Mullany LK,Richards JS

更新日期：2012-04-01 00:00:00

abstract：:The absence of TSH-stimulated radioiodide uptake in differentiated thyroid cancer is associated with a high recurrence rate and reduced survival. We studied regulation of the sodium/iodide symporter gene in human papillary thyroid cancer cell lines (BHP) and primary human thyroid cells. BHP cells expressed very low le...

journal_title：Endocrinology

authors： Kogai T,Hershman JM,Motomura K,Endo T,Onaya T,Brent GA

更新日期：2001-08-01 00:00:00

abstract：:Tumor necrosis factor-alpha (TNF) and interleukin-1 beta (IL-1) are secreted by activated monocytes and other immune cells. Since IL-1 has been shown to elevate rat plasma ACTH and both of these cytokines induce similar acute-phase responses, the present studies of TNF were undertaken to characterize the ACTH response...

journal_title：Endocrinology

authors： Sharp BM,Matta SG,Peterson PK,Newton R,Chao C,Mcallen K

更新日期：1989-06-01 00:00:00

abstract：:Prostacyclin (PGI2) (1-5 micrograms in 3 microliters 0.05 M Tris/HCl buffer, pH 7.5) and its stable metabolite, 6-oxo-PGF1 alpha, were microinjected into the third ventricle of ovariectomized rats, and plasma FSH, GH, PRL, and TSH levels were measured by RIA. Control animals received 3 microliters buffer. Injection of...

journal_title：Endocrinology

authors： Ottlecz A,Samson WK,McCann SM

更新日期：1984-02-01 00:00:00

abstract：:To examine further the relationship between developmental changes in LH release and the onset of puberty, effects of posterior hypothalamic lesions were tested in ovariectomized (OVX), sexually immature female monkeys. In OVX females (n = 3) with sham hypothalamic lesions basal LH levels were suppressed during the pre...

journal_title：Endocrinology

authors： Schultz NJ,Terasawa E

更新日期：1988-07-01 00:00:00

abstract：:Single-minded 1 (SIM1) mutations are associated with obesity in mice and humans. Haploinsufficiency of mouse Sim1 causes hyperphagic obesity with increased linear growth and enhanced sensitivity to a high-fat diet, a phenotype similar to that of agouti yellow and melanocortin 4 receptor knockout mice. To investigate t...

journal_title：Endocrinology

authors： Kublaoui BM,Holder JL Jr,Tolson KP,Gemelli T,Zinn AR

更新日期：2006-10-01 00:00:00

abstract：:The actions and the mechanisms of action of epidermal growth factor (EGF) in testicular steroidogenesis were investigated using a model of primary culture of purified porcine Leydig cells from immature intact animals. EGF decreased (1.7-fold) human CG (hCG)-induced dehydroepiandrosterone (DHEA) accumulation in the med...

journal_title：Endocrinology

authors： Sordoillet C,Chauvin MA,de Peretti E,Morera AM,Benahmed M

更新日期：1991-04-01 00:00:00

abstract：:11 beta-Hydroxysteroid dehydrogenase (11 beta HSI) is an enzyme complex responsible for the conversion of hormonally active cortisol to inactive cortisone; two isoforms of the enzyme have been cloned and characterized. Clinical observations from patients with the hypertensive syndrome apparent mineralocorticoid excess...

journal_title：Endocrinology

authors： Shimojo M,Ricketts ML,Petrelli MD,Moradi P,Johnson GD,Bradwell AR,Hewison M,Howie AJ,Stewart PM

更新日期：1997-03-01 00:00:00

abstract：:Exposure of rats to microsomal enzyme inducers perturbs thyroid hormone (TH) homeostasis through a variety of mechanisms. Glucuronidation is an important metabolic pathway for TH and is catalyzed by uridine diphosphate-dibenzo-glucuronosyltransferase (UGT) family proteins. Administration of 2,3,7,8-tetrachlorodibenzo-...

journal_title：Endocrinology

authors： Emi Y,Ikushiro S,Kato Y

更新日期：2007-12-01 00:00:00

abstract：:The role of calcium in the angiotensin II- or potassium-mediated increase in aldosterone production was analyzed in isolated glomerulosa cells prepared from bovine adrenal glands. The response to potassium was highly dependent on the extracellular calcium concentration, and a maximal response was observed at 0.5 mM ca...

journal_title：Endocrinology

authors： Foster R,Lobo MV,Rasmussen H,Marusic ET

更新日期：1981-12-01 00:00:00

abstract：:Prolactin (PRL) is an immunomodulatory hormone which promotes T-cell activation and proliferation. However, the intracellular mechanisms of this action in normal lymphocytes are unknown. Because the PRL receptor (PRLR) activates several signals also activated by the T-cell antigen receptor (TCR)/CD3 complex, we evalua...

journal_title：Endocrinology

authors： Montgomery DW,Krumenacker JS,Buckley AR

更新日期：1998-02-01 00:00:00

abstract：:Initiation of folliculogenesis through the induction of primordial follicle development in the ovary has an important role in determining the fertility and reproductive fitness of most mammalian species. The factors that control this critical process are largely unknown. The hypothesis tested in the current study was ...

journal_title：Endocrinology

authors： Parrott JA,Skinner MK

更新日期：1999-09-01 00:00:00

abstract：:Glycosylphosphatidylinositol-specific phospholipase D (GPI-PLD) is abundant in mammalian serum, but the source of the circulating enzyme is unknown. Pancreatic islets have been reported to contain and secrete GPI-PLD. In this report we examined the regulation of GPI-PLD secretion from beta TC3 cells, a mouse insulinom...

journal_title：Endocrinology

authors： Deeg MA,Verchere CB

更新日期：1997-02-01 00:00:00

abstract：:We have established immortalized human granulosa cells by triple transfection of primary cells obtained from in vitro fertilization patients with SV40 DNA, Ha-ras oncogene, and a temperature sensitive (ts) mutant of the tumor suppressor gene p53 (p53val135). Forty-one clones were isolated, and their steroidogenic resp...

journal_title：Endocrinology

authors： Hosokawa K,Dantes A,Schere-Levy C,Barash A,Yoshida Y,Kotsuji F,Vlodavsky I,Amsterdam A

更新日期：1998-11-01 00:00:00

abstract：:Aggression enables individuals to obtain and retain limited resources. Studies of the neuroendocrine regulation of aggression have focused on territorial and reproductive contexts. By contrast, little is understood concerning the neuroendocrine regulation of aggression over other resources, such as food. Here, we deve...

journal_title：Endocrinology

authors： Fokidis HB,Prior NH,Soma KK

更新日期：2013-11-01 00:00:00