The dynamics of testosterone and dihydrotestosterone metabolism in the adult male rhesus monkey.

abstract：:The neuronal growth-associated protein (GAP)-43 has been localized in both long fibers and punctate clusters by immunocytochemistry within the rat anterior pituitary (AP). After adrenalectomy (ADX), GAP-43 immunoreactivity (GAP-43-ir) is greatly increased and is associated with corticotrophs at the light microscopic l...

journal_title：Endocrinology

authors： Paden CM,Watt JA,Selong TH,Paterson CL,Cranston HJ

更新日期：2006-02-01 00:00:00

abstract：:GnRH neurons were harvested from adult male rats in order to determine if LH or FSH directly altered the modalities of GnRH release and/or cellular GnRH content. Cultures received vehicle, 25 ng/ml LH, 125 ng/ml LH, 25 ng/ml FSH, or 125 ng/ml FSH, and media samples were collected before treatment, during the treatment...

journal_title：Endocrinology

authors： Melrose PA

更新日期：1987-07-01 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：:To investigate the role of the C18 substituents in the agonist/antagonist properties of mineralocorticoids, the activities of certain C18-substituted progesterone (P) derivatives were examined. These compounds were characterized by an unsaturated side-chain in the case of 18-vinylprogesterone (18VP) and 18-ethynylprog...

journal_title：Endocrinology

authors： Souque A,Fagart J,Couette B,Davioud E,Sobrio F,Marquet A,Rafestin-Oblin ME

更新日期：1995-12-01 00:00:00

abstract：:Macrophage migration inhibitory factor (MIF) is a proinflammatory cytokine that plays a pivotal role in several immunoinflammatory and autoimmune diseases. In this study we examined the role of MIF in the development of immunoinflammatory diabetes induced in susceptible strains of mice by multiple low doses of strepto...

journal_title：Endocrinology

authors： Cvetkovic I,Al-Abed Y,Miljkovic D,Maksimovic-Ivanic D,Roth J,Bacher M,Lan HY,Nicoletti F,Stosic-Grujicic S

更新日期：2005-07-01 00:00:00

abstract：:An estrogen (E2)-dependent 90,000-92,000 M(r) protein is synthesized and released by the sheep oviduct in a temporally and regionally specific manner during the first few days of pregnancy, where it associates with the embryo. The present study was undertaken to further define the nature of this protein and its regula...

journal_title：Endocrinology

authors： DeSouza MM,Murray MK

更新日期：1995-06-01 00:00:00

abstract：:We have previously shown that in reaggregate cell cultures of 14-day-old female rat pituitary, LHRH is capable of stimulating lactotrophs to enter the S-phase of the cell cycle, and that this effect is mediated by paracrine growth factors secreted from gonadotrophs. In the present report we describe the isolation, pur...

journal_title：Endocrinology

authors： Tilemans D,Andries M,Proost P,Devreese B,Van Beeumen J,Denef C

更新日期：1994-07-01 00:00:00

abstract：:We have examined the regulation of adipogenesis of a 3T3-F442A cell variant. The variant, designated 3T3-GH-independent clone 16 (GI-16), was isolated after serum-induced adipogenic commitment. 3T3-GI-16 fibroblasts displayed a lower serum requirement for adipogenesis than the 3T3-F442A parent cell. Insulin-stimulated...

journal_title：Endocrinology

authors： Guller S,Sonenberg M,Corin RE

更新日期：1989-01-01 00:00:00

abstract：:[14C]-3-O-Methyl-D-glucose transport in response to GH stimulation was measured in freshly prepared and cultured hepatocytes from hypophysectomized (hypox) adult female rats. Sugar transport in freshly isolated hepatocytes from hypox animals was stimulated by 10(-9) M human GH (hGH) and 10(-9) M rat GH (rGH) during 0-...

journal_title：Endocrinology

authors： Fix JA,Moore WV

更新日期：1981-01-01 00:00:00

abstract：:Pulsatile release of GnRH-1 is critical to stimulate gonadotropes of the anterior pituitary. This secretory pattern seems to be inherent to GnRH-1 neurons, however, the mechanisms underlying such episodical release remain unknown. In monkey nasal explants, the GnRH-1 population exhibits synchronized calcium events wit...

journal_title：Endocrinology

authors： Constantin S,Caraty A,Wray S,Duittoz AH

更新日期：2009-07-01 00:00:00

abstract：:Due to increased numbers of young cancer patients and improved survival, the impact of anticancer treatments on fertility has become a major health concern. Despite mounting research on ovarian toxicity, there is paucity of data regarding reliable biomarkers of testicular toxicity. Our aim was to evaluate anti-Mülleri...

journal_title：Endocrinology

authors： Levi M,Hasky N,Stemmer SM,Shalgi R,Ben-Aharon I

更新日期：2015-10-01 00:00:00

abstract：:GH3 rat pituitary cells have L-type voltage-gated calcium channels, and both the rate of uptake of 45Ca2+ and the concentration of intracellular free calcium ion ([Ca2+]i) are increased by depolarization with high potassium. Cells incubated for several days with 10 nM epidermal growth factor (EGF) responded to depolar...

journal_title：Endocrinology

authors： Hinkle PM,Nelson EJ,Haymes AA

更新日期：1993-07-01 00:00:00

abstract：:The hormonal requirements for lactogenesis were investigated using explant cultures of mammary tissue obtained from cows at 30-40 days prepartum. Hormones used were insulin, hydrocortisone, and prolactin, and parameters examined were radioactive acetate incorporation into fatty acids, secretory response ratings, and h...

journal_title：Endocrinology

authors： Collier RJ,Bauman DE,Hays RL

更新日期：1977-04-01 00:00:00

abstract：:Although cells of the osteoblast lineage express functional ERs, direct effects of estrogen on bone formation remain obscure. In the present study, we have investigated estrogen effects on osteoblastic and adipocytic differentiation from a mouse bone marrow stromal cell line, ST-2, which had been manipulated to overex...

journal_title：Endocrinology

authors： Okazaki R,Inoue D,Shibata M,Saika M,Kido S,Ooka H,Tomiyama H,Sakamoto Y,Matsumoto T

更新日期：2002-06-01 00:00:00

abstract：:Apoptosis is the process of cellular self-destruction, and genes such as bcl-2 and bax are known to inhibit and promote apoptosis, respectively. In this study, we show that apoptosis can be induced in pancreatic beta-cell lines, and we investigate the apoptotic pathways through the bcl-2 and bax genes and intracellula...

journal_title：Endocrinology

authors： Mizuno N,Yoshitomi H,Ishida H,Kuromi H,Kawaki J,Seino Y,Seino S

更新日期：1998-03-01 00:00:00

abstract：:P19 EPI-7, a differentiated murine embryonal carcinoma cell line with an epithelioid morphology, does not require external growth factors for proliferation under clonal and subconfluent conditions. At saturation density, however, cells become quiescent in the G1/G0 phase of the cell cycle from which they can be restim...

journal_title：Endocrinology

authors： van Zoelen EJ,Koornneef I,Holthuis JC,Ward-van Oostwaard TM,Feijen A,de Poorter TL,Mummery CL,van Buul-Offers SC

更新日期：1989-04-01 00:00:00

abstract：:Mature 31- and 34-kDa inhibin A and B negatively regulate the release of FSH from the anterior pituitary; however, a direct comparison of these hormones in vivo has not been undertaken. The bioactivities of highly purified preparations of recombinant human 31-kDa inhibin A and B were determined in rat pituitary cells ...

journal_title：Endocrinology

authors： Makanji Y,Temple-Smith PD,Walton KL,Harrison CA,Robertson DM

更新日期：2009-10-01 00:00:00

abstract：:Using a Leydig tumor cell line (MA-10) transiently transfected with the human lutropin receptor (hLHR) and mutants thereof, we examined the identity of the G proteins activated by the agonist-engaged hLHR-wild type (wt) and by three of its naturally occurring constitutively active mutants. Two of the mutants examined,...

journal_title：Endocrinology

authors： Hirakawa T,Ascoli M

更新日期：2003-09-01 00:00:00

abstract：:PRL and placental lactogen (PL) play key roles in maintaining the rodent corpus luteum through pregnancy. Suppressors of cytokine signaling (SOCS) have been shown to decrease cell sensitivity to cytokines, including PRL, and so here we have addressed the issue of whether luteolysis induced by prostaglandin F(2alpha) (...

journal_title：Endocrinology

authors： Curlewis JD,Tam SP,Lau P,Kusters DH,Barclay JL,Anderson ST,Waters MJ

更新日期：2002-10-01 00:00:00

abstract：:Bovine placental lactogen (bPL) has been isolated from bovine trophoblast and characterized as a 32 K mol wt protein which exists in three different forms which differ in their isoelectric point values and their amino acid compositions. Two of the three forms have been shown to have both bovine GH (bGH)- and bovine PR...

journal_title：Endocrinology

authors： Duello TM,Byatt JC,Bremel RD

更新日期：1986-09-01 00:00:00

abstract：:Medullary thyroid cancer (MTC) is a C cell neoplasm-secreting calcitonin. Surgery remains the only treatment as the primary tumor and metastases resist radio- and chemotherapies. MTC produces high amounts of prostaglandins (PGs). Nonsteroidal antiinflammatory drugs have an antitumoral effect, generally related to the ...

journal_title：Endocrinology

authors： Quidville V,Segond N,Pidoux E,Cohen R,Jullienne A,Lausson S

更新日期：2004-05-01 00:00:00

abstract：:The hepatic extractions of gastric inhibitory polypeptide (GIP) and insulin were determined using in vitro and in vivo methods to assess the role of the liver in GIP metabolism and the possible effect of GIP on the hepatic extraction of insulin. During in vitro studies using the isolated perfused rat liver, infusion o...

journal_title：Endocrinology

authors： Hanks JB,Andersen DK,Wise JE,Putnam WS,Meyers WC,Jones RS

更新日期：1984-09-01 00:00:00

abstract：:We studied the direct effects of glucocorticoids on plasminogen activator (PA) production by rat granulosa cells. PA production was assayed by culturing rat granulosa cells on [125I]fibrin plates and determining the extent of fibrinolysis after addition of the specific substrate plasminogen. In granulosa cells from pr...

journal_title：Endocrinology

authors： Wang C,Leung A

更新日期：1989-04-01 00:00:00

abstract：:In the present study, we report that ACTH induces a transient chloride current. The lack of correlation between ACTH-induced cAMP production and amplitude of the Cl- current, as well as the absence of stimulation by forskolin or 8Br-cAMP indicated that the ACTH-induced current was not cAMP-dependent. We explored the p...

journal_title：Endocrinology

authors： Chorvátová A,Gendron L,Bilodeau L,Gallo-Payet N,Payet MD

更新日期：2000-02-01 00:00:00

abstract：:Nuclear proteins extracted from purified nuclei with 0.4M KCl at pH 7.4 OR 8.5 are able to bind L-triiodothyronine (T3) giving rise to nuclear thyroid hormone binding protein-T3 (NTBP-T3) complexes. Binding is maximum in 3 h at 20 C. It is thermolabile even at 36 C, inhibited by p-hydroxymercuribenzoate and markedly e...

journal_title：Endocrinology

authors： Torresani J,DeGroot LJ

更新日期：1975-05-01 00:00:00

abstract：:Somatostatin-like immunoreactivity (SRIF-LI) has previously been demonstrated immunohistochemically in rat thyroid parafollicular cells. Studies were therefore performed to determine whether SRIF-LI was present in a transplantable medullary carcinoma of the thyroid (MCT) in the WAG/Rij strain of rat. SRIF-LI was found...

journal_title：Endocrinology

authors： Berelowitz M,Cibelius M,Szabo M,Frohman LA,Epstein S,Bell NH

更新日期：1980-11-01 00:00:00

abstract：:The main objectives of the present study were to investigate the effects of 6-n-propyl-2-thiouracil (PTU) on Sertoli cell proliferation, germ cell number, and testis size in Nile tilapias (Oreochromis niloticus). In this regard, young fish (approximately 1 g BW and approximately 3.5 cm total in length) were treated fo...

journal_title：Endocrinology

authors： Matta SL,Vilela DA,Godinho HP,França LR

更新日期：2002-03-01 00:00:00

abstract：:We studied the interactions of two natural thyroid hormone receptor (TR) mutants from patients with resistance to thyroid hormone (RTH) and an artificial TR mutant with a nuclear receptor corepressor, N-CoR, and a steroid receptor coactivator, SRC-1. In electrophoretic mobility shift assays, wild-type TRbeta-1 interac...

journal_title：Endocrinology

authors： Liu Y,Takeshita A,Misiti S,Chin WW,Yen PM

更新日期：1998-10-01 00:00:00

abstract：:Dispersed Leydig cells were prepared from pig testes and purified in a discontinuous Percoll gradient. About 95% of these cells stained for 3 beta-hydroxysteroid dehydrogenase. The cells were cultured in a chemically defined medium. Testosterone production was low (2 +/- 0.4 ng/10(6) cells/day) under basal conditions,...

journal_title：Endocrinology

authors： Benahmed M,Reventos J,Saez JM

更新日期：1983-06-01 00:00:00

abstract：:To investigate the possibility that a common phenomenon might exist by which glucocorticoids influence responses to thyroid hormones, the cytosol levels of four proteins were measured after 2 days of treatment with L-T3 (T3; 50 micrograms/100 g. day 2) and/or cortisone (2 mg/100 g./day) in adult male hypothyroid rats....

journal_title：Endocrinology

authors： Shapiro LE,Sachchidananda J

更新日期：1982-08-01 00:00:00