Pharmacological studies of thyrotropin-releasing hormone (TRH) receptors from Xenopus laevis: is xTRHR3 a TRH receptor?

abstract：:We examined the effects of the polycationic antibiotic, neomycin, on the function of dispersed bovine parathyroid cells. Neomycin caused a reversible, dose-dependent inhibition of low calcium (Ca++)-stimulated PTH release, with half-maximal inhibition at 30 microM. Maximal inhibition (with 200 microM neomycin) was not...

journal_title：Endocrinology

authors： Brown EM,Butters R,Katz C,Kifor O

更新日期：1991-06-01 00:00:00

abstract：:In teleosts, the pituitary contains a single glycoprotein gonadotropic hormone (GTH) composed of two dissimilar alpha- and beta-subunits. The European eel, Anguilla anguilla L, is sexually immature at the silver stage due to a deficiency in GTH synthesis and secretion. In previous studies we (S.D., YA.F.) have demonst...

journal_title：Endocrinology

authors： Counis R,Dufour S,Ribot G,Quérat B,Fontaine YA,Jutisz M

更新日期：1987-09-01 00:00:00

abstract：:In this study on highly enriched populations of cultured rat corticotropes, Ca2+ channel inhibitors were used to identify subtypes of the high threshold Ca2+ channel current under voltage clamp conditions. From a holding potential (-50 mV) that eliminated the low threshold T-type current, 52 +/- 4% of the total curren...

journal_title：Endocrinology

authors： Kuryshev YA,Childs GV,Ritchie AK

更新日期：1995-09-01 00:00:00

abstract：:This study was designed to investigate the role of dopaminergic mechanisms in the control of aldosterone secretion. Six rhesus monkeys received metoclopramide (1.25 mg, iv), with 5% dextrose (vehicle) or with dopamine (4 micrograms/kg . min) infusions begun 60 min before the administration of the dopamine antagonists....

journal_title：Endocrinology

authors： Sowers JR,Berg G,Martin VS,Mayes DM

更新日期：1982-04-01 00:00:00

abstract：:The present study was undertaken to investigate the role of angiotensin II (Ang II) in ovulation and ovarian steroidogenesis and prostaglandin (PG) production via the Ang II receptors in rabbit ovaries. In in vitro perfused rabbit ovaries, PD123319, a selective nonpeptide antagonist for AT2 receptors, reduced the Ang ...

journal_title：Endocrinology

authors： Yoshimura Y,Karube M,Aoki H,Oda T,Koyama N,Nagai A,Akimoto Y,Hirano H,Nakamura Y

更新日期：1996-04-01 00:00:00

abstract：:The action of sex steroids on the growth and differentiation of target tissues requires the presence of specific intracellular receptors. We compared the distribution of cells containing estrogen receptor (ER) and/or progesterone receptor (PR) in rabbit uterus by immunohistochemistry using monoclonal antibodies direct...

journal_title：Endocrinology

authors： Zaino RJ,Clarke CL,Feil PD,Satyaswaroop PG

更新日期：1989-11-01 00:00:00

abstract：:The enzyme nitric oxide (NO) synthase is present in the paraventricular nucleus, while nitric oxide has recently been shown to inhibit the stimulated release of corticotrophin-releasing hormone (CRH) in vitro. Thus the possible role of NO in regulating, vasopressin (AVP), which also plays an important role in pituitar...

journal_title：Endocrinology

authors： Yasin S,Costa A,Trainer P,Windle R,Forsling ML,Grossman A

更新日期：1993-09-01 00:00:00

abstract：:After 5 days of incubation with 10 nM tritiated dexamethasone, the amount of glucocorticoid displaceably-bound by the ACTH-secreting, glucocorticoid-responsive AtT-20 mouse pituitary tumor cell decreases by 70-80%. This decrease takes place in both the cytosolic and nuclear fractions. Although one might predict that t...

journal_title：Endocrinology

authors： Svec F,Rudis M

更新日期：1982-08-01 00:00:00

abstract：:Chronic elevated glucose levels and activation of the renal renin-angiotensin system have been implicated in the pathogenesis of diabetic nephropathy. We tested the ability of lisofylline (LSF), a novel antiinflammatory compound, to prevent extracellular matrix (ECM) accumulation and growth factor production by human ...

journal_title：Endocrinology

authors： Bolick DT,Hatley ME,Srinivasan S,Hedrick CC,Nadler JL

更新日期：2003-12-01 00:00:00

abstract：:Atrial (ANP), brain (BNP), and C-type natriuretic peptide (CNP) belong to a family of hormones important in blood pressure and sodium homeostasis. Expression of ANP has been reported in embryo hearts, but BNP and CNP expression during development has not been described. We used in situ hybridization to identify the si...

journal_title：Endocrinology

authors： Cameron VA,Aitken GD,Ellmers LJ,Kennedy MA,Espiner EA

更新日期：1996-03-01 00:00:00

abstract：:We investigated the effect of epidermal growth factor (EGF) on collagen and protein synthesis in clone MC3T30-E1, a cell line which retains osteoblast-like characteristics. EGF at concentrations of 2-50 ng/ml significantly the hydroxyproline content of the cell layer. These effects were completely abolished by the add...

journal_title：Endocrinology

authors： Hiramatsu M,Kumegawa M,Hatakeyama K,Yajima T,Minami N,Kodama H

更新日期：1982-12-01 00:00:00

abstract：:The insulin-, glucagon- and somatostatin-producing cells (beta, alpha, and delta, respectively) in the pancreatic islets derive from a common precursor stem cell and differentiate sequentially during embryonic development. The homeodomain protein islet duodenum HOX (IDX)-1 [insulin promoter factor (IPF)-1/somatostatin...

journal_title：Endocrinology

authors： Lu M,Miller C,Habener JF

更新日期：1996-07-01 00:00:00

abstract：:Pituitary adenylate cyclase-activating polypeptide (PACAP) is expressed at a high level in the fetal pituitary and decreases profoundly between embryonic day 19 and postnatal day 1 (PN1), with a further decrease from PN1 to PN4. In this series of experiments, we investigated the hypothesis that dopamine 2 receptor (Dr...

journal_title：Endocrinology

authors： Winters SJ,Ghooray DT,Yang RQ,Holmes JB,O'Brien AR,Morgan J,Moore JP Jr

更新日期：2014-07-01 00:00:00

abstract：:The basal concentration and metabolic clearance of radiolabeled and endogenous thyroglobulin (Tg) were measured in normal male rats. Serum Tg concentrations (by RIA) in Sprague-Dawley adult males ranged from 70-680 ng/ml (mean +/- SD, 218 +/- 177). In male Fisher rats, basal serum Tg concentrations were 32-263 ng/ml. ...

journal_title：Endocrinology

authors： Izumi M,Larsen PR

更新日期：1978-07-01 00:00:00

abstract：:The antithyroid drug 6-propylthiouracil (PTU) was previously shown in our laboratory to have an unexpectedly prolonged inhibitory effect on iodination in the thyroid glands of rats. Eighteen hours after injection of a relatively small dose, iodination in the thyroid remained inhibited by more than 90%. We previously s...

journal_title：Endocrinology

authors： Taurog A,Dorris ML

更新日期：1989-06-01 00:00:00

abstract：:Oxytocin (OT) receptors (OTRs) mediate reproductive functions, including the initiation of labor and milk ejection. OTR messenger RNA levels are highly regulated, reaching the greatest concentration in the uterus at the end of gestation, and in the mammary gland during lactation. Factors directly effecting changes in ...

journal_title：Endocrinology

authors： Hoare S,Copland JA,Wood TG,Jeng YJ,Izban MG,Soloff MS

更新日期：1999-05-01 00:00:00

abstract：:There is now general agreement that neurokinin B (NKB) acts via neurokinin-3-receptor (NK3R) to stimulate secretion of GnRH and LH in several species, including rats, mice, sheep, and humans. However, the roles of two other tachykinins, substance P (SP) and neurokinin A, which act primarily via NK1R and NK2R, respecti...

journal_title：Endocrinology

authors： Fergani C,Mazzella L,Coolen LM,McCosh RB,Hardy SL,Newcomb N,Grachev P,Lehman MN,Goodman RL

更新日期：2016-12-01 00:00:00

abstract：:The biosynthesis of various hypothalamic neuropeptides has been previously reported in anterior pituitary cells but not in intermediate lobe cells. We have recently demonstrated the occurrence of two somatostatin isoforms in the frog brain, namely somatostatin-14 (SS1) and [Pro(2),Met(13)]somatostatin-14 (SS2). In the...

journal_title：Endocrinology

authors： Tostivint H,Vieau D,Chartrel N,Boutelet I,Galas L,Fournier A,Lihrmann I,Vaudry H

更新日期：2002-09-01 00:00:00

abstract：:To evaluate the relative contribution of the GH/IGF axis to the development of peak bone mineral density (BMD), we measured skeletal changes in IGF-I knockout (KO), IGF-II KO, and GH-deficient lit/lit mice and their corresponding control mice at d 23 (prepubertal), 31 (pubertal), and 56 (postpubertal) in the entire fe...

journal_title：Endocrinology

authors： Mohan S,Richman C,Guo R,Amaar Y,Donahue LR,Wergedal J,Baylink DJ

更新日期：2003-03-01 00:00:00

abstract：:Progesterone (P4) inhibits apoptosis of rat granulosa cells and spontaneously immortalized granulosa cells (SIGCs), which were derived from rat granulosa cells. Defining the mechanism through which P4 mediates its action has been difficult because these cells do not express the classic nuclear P4 receptor. Previous st...

journal_title：Endocrinology

authors： Peluso JJ,Pappalardo A,Fernandez G,Wu CA

更新日期：2004-06-01 00:00:00

abstract：:Multiplication-stimulating activity (MSA), an insulin-like growth factor (IGF) (rat IGF II), binds to extracts of many tissues from fetal lambs. We now report the presence of high concentrations of a glycoprotein receptor with a high affinity for MSA-II in microsomes prepared from fetal lamb liver. The binding of radi...

journal_title：Endocrinology

authors： Owens PC,Waters MJ,Thorburn GD,Brinsmead MW

更新日期：1985-09-01 00:00:00

abstract：:Vasoactive intestinal polypeptide (VIP) was measured by RIA in the hypophysial portal blood of rats after total hypophysectomy. The mean (+/- SE) VIP concentrations were 1332 +/- 171 pg/ml (range, 300-3868 pg/ml) under urethane anesthesia and 1735 +/- 707 pg/ml under pentobarbital anesthesia. The concentrations of VIP...

journal_title：Endocrinology

authors： Shimatsu A,Kato Y,Matsushita N,Katakami H,Yanaihara N,Imura H

更新日期：1981-02-01 00:00:00

abstract：:Ghrelin was recently identified as an endogenous ligand of the GH secretagogue receptor. The novel peptide hormone is produced by gastric A-like cells, and circulating levels rise before feeding, suggestive of ghrelin as an endogenous hunger factor. ghrelin stimulates food intake and promotes adiposity after periphera...

journal_title：Endocrinology

authors： Tang-Christensen M,Vrang N,Ortmann S,Bidlingmaier M,Horvath TL,Tschöp M

更新日期：2004-10-01 00:00:00

abstract：:GH receptor (GHR) mediates the anabolic and metabolic effects of GH. We previously characterized a monoclonal antibody (anti-GHR(ext-mAb)) that reacts with subdomain 2 of the rabbit GHR extracellular domain (ECD) and is a conformation-specific inhibitor of GH signaling in cells bearing rabbit or human GHR. Notably, th...

journal_title：Endocrinology

authors： Jiang J,Wan Y,Wang X,Xu J,Harris JM,Lobie PE,Zhang Y,Zinn KR,Waters MJ,Frank SJ

更新日期：2011-12-01 00:00:00

abstract：:The extent thyroid hormone receptors (TRs) bind to AGGTCA-related motifs as monomers and/or homodimers, and as heterodimers with retinoid X receptors (RXRs) depends on the number, spacing, and orientation of these half-sites. Here we show that recombinant RXR alpha affects TR binding to DNA in diverse ways; it enhance...

journal_title：Endocrinology

authors： Ribeiro RC,Apriletti JW,Yen PM,Chin WW,Baxter JD

更新日期：1994-11-01 00:00:00

abstract：:GnRH is detectable in the cerebrospinal fluid (CSF), but its source remains unidentified. Previous studies have harvested CSF for GnRH analysis from the median eminence region, but it is unknown whether GnRH in CSF is restricted to this region. If CSF-GnRH plays a physiological role, through volume transmission, to co...

journal_title：Endocrinology

authors： Caraty A,Skinner DC

更新日期：2008-10-01 00:00:00

abstract：:Previous studies from this laboratory have demonstrated the presence of two populations of rat Leydig cells (I and II), which differ in their capacity for hCG- or cAMP-stimulated testosterone production. In the present study, we examined the metabolism of 25-hydroxycholesterol in primary cultures of both populations o...

journal_title：Endocrinology

authors： Georgiou M,Payne AH

更新日期：1985-09-01 00:00:00

abstract：:The utility of the established ACTH secreting mouse pituitary tumor cell line AtT20 for investigating early glucocorticoid inhibition was examined. Three different strains of the cell line D1, D16v, and D16:16, respectively, were analyzed. In initial studies CRF and phorbol esters were used as secretagogues to examine...

journal_title：Endocrinology

authors： Woods MD,Shipston MJ,Mullens EL,Antoni FA

更新日期：1992-12-01 00:00:00

abstract：:A RT-PCR approach was used to clone and sequence the full-length growth hormone receptor (GHR) of a teleost fish, the turbot (Scophthalmus maximus). Total liver RNA was amplified by RT-PCR with degenerate primers designed in extracellular and cytoplasmic regions, and a single DNA fragment of 1100 bp was obtained. The ...

journal_title：Endocrinology

authors： Calduch-Giner J,Duval H,Chesnel F,Boeuf G,Pérez-Sánchez J,Boujard D

更新日期：2001-07-01 00:00:00

abstract：:The previously reported synchronous oscillations in plasma glucose and insulin levels have been further studied to determine whether the phenomenon can be attributed to cyclic secretion or degradation of the hormone. Plasma C-peptide concentrations were measured and found to cycle with the same period as plasma insuli...

journal_title：Endocrinology

authors： Koerker DJ,Goodner CJ,Hansen BW,Brown AC,Rubenstein AH

更新日期：1978-05-01 00:00:00