Freeze fracture morphology of thyroid tight junctions in goats with different thyrotropin stimulation.

abstract：:The rapid, nongenomic effects of estrogen are increasingly recognized as playing an important role in several aspects of estrogen action. Rapid activation of the mitogen-activated protein kinase (MAPK) signaling pathway by estrogen is among the more recently identified of these effects. To explore the role of estrogen...

journal_title：Endocrinology

authors： Wade CB,Robinson S,Shapiro RA,Dorsa DM

更新日期：2001-06-01 00:00:00

abstract：:GnRH was first identified as the hypothalamic decapeptide that promotes gonadotropin release from pituitary gonadotropes. Thereafter, direct stimulatory and inhibitory effects of GnRH on cell proliferation were demonstrated in a number of types of primary cultured cells and established cell lines. Recently, the effect...

journal_title：Endocrinology

authors： Enomoto M,Utsumi M,Park MK

更新日期：2006-01-01 00:00:00

abstract：:Flow cytometry was used to separate and identify Sertoli and germ cell populations in primary rat testicular cultures derived from animals of different ages on the basis of cell size and DNA and lipid content. Multiparameter fluorescent evaluation of each cell preparation resulted in the assignment of specific stainin...

journal_title：Endocrinology

authors： Woodruff TK,Borree J,Attie KM,Cox ET,Rice GC,Mather JP

更新日期：1992-02-01 00:00:00

abstract：:Localized expression of cytochromes P450 17 alpha-hydroxylase (P450c17) and aromatase (P450arom) was investigated in embryonic cell layers of elongating porcine blastocysts by immunocytochemistry. Blastocysts were flushed from the uterus on day 12 of pregnancy, fixed in paraformaldehyde, embedded in paraffin, sectione...

journal_title：Endocrinology

authors： Conley AJ,Christenson LK,Ford SP,Christenson RK

更新日期：1994-12-01 00:00:00

abstract：:The somatic Sertoli cells of the testis are major targets for FSH and are important for the regulation of spermatogenesis. The binding of FSH to Sertoli cells activates the cAMP-dependent protein kinase A signaling pathway, resulting in phosphorylation of the cAMP response element-binding protein (CREB), which is requ...

journal_title：Endocrinology

authors： Walker WH,Fucci L,Habener JF

更新日期：1995-08-01 00:00:00

abstract：:Like insulin-like growth factor binding protein-3 (IGFBP-3), IGFBP-5 forms a ternary complex with insulin-like growth factor (IGF)-I or IGF-II, and the acid-labile subunit (ALS). The study of IGFBP-5/IGFBP-6 chimeric proteins with amino-terminal and middle domain swaps, has revealed the existence of a site in the midd...

journal_title：Endocrinology

authors： Twigg SM,Kiefer MC,Zapf J,Baxter RC

更新日期：2000-01-01 00:00:00

abstract：:Male Wistar rats were treated with 50 mg 3,3',4,4'-tetrachlorobiphenyl (TCB)/kg BW or vehicle. After 4 days, the livers were isolated and perfused for 90 min with 2 nM [125I]T3 or 10 nM [125I]T4 in Krebs-Ringer medium containing 1% albumin. Deiodination and conjugation products and remaining substrates were determined...

journal_title：Endocrinology

authors： Beetstra JB,van Engelen JG,Karels P,van der Hoek HJ,de Jong M,Docter R,Krenning EP,Hennemann G,Brouwer A,Visser TJ

更新日期：1991-02-01 00:00:00

abstract：:The fragile X syndrome is the most frequent hereditary form of mental retardation. This X-linked disorder is, in most cases, caused by an unstable and expanding trinucleotide CGG repeat located in the 5'-untranslated region of the gene involved, the fragile X mental retardation 1 (FMR1) gene. Expansion of the CGG repe...

journal_title：Endocrinology

authors： Slegtenhorst-Eegdeman KE,de Rooij DG,Verhoef-Post M,van de Kant HJ,Bakker CE,Oostra BA,Grootegoed JA,Themmen AP

更新日期：1998-01-01 00:00:00

abstract：:In higher primates, FSH secretion appears to be regulated by a control system consistent with that described by the classical inhibin hypothesis. The purpose of the present experiment was to examine the time course of inhibin's action to suppress FSH secretion in the intact adult male rhesus monkey. To this end, five ...

journal_title：Endocrinology

authors： Ramaswamy S,Pohl CR,McNeilly AS,Winters SJ,Plant TM

更新日期：1998-08-01 00:00:00

abstract：:The influence of sex hormones on the immune response to foreign antigens as well as self-antigens is now recognized. In this study, we investigated the influence of gender and sex hormones on the development of antibodies to double-stranded DNA in nonautoimmune C57BL/6J mice. Immunoglobulin G (IgG) anti-dsDNA antibodi...

journal_title：Endocrinology

authors： Verthelyi D,Ahmed SA

更新日期：1994-12-01 00:00:00

abstract：:The induction of long-term responses in the uterus following estrogen treatment is discussed, with special reference to DNA synthesis. Immature female rats injected daily with estradiol-17beta or estriol (0.01 to 1 mug) or a combination of the two steroids for one, two or three consecutive days were sacrificed at inte...

journal_title：Endocrinology

authors： Stormshak F,Leake R,Wertz N,Gorski J

更新日期：1976-12-01 00:00:00

abstract：:The microenvironment of placental mesenchymal stem cells (PMSCs) is dynamic throughout gestation and determines changes in cell fate. In vivo, PMSCs initially develop in low-oxygen tension and low IGF-I concentrations, and both increase gradually with gestation. The impact of varying concentrations of IGF-I and changi...

journal_title：Endocrinology

authors： Youssef A,Iosef C,Han VK

更新日期：2014-04-01 00:00:00

abstract：:In the present study epididymal epithelium was immortalized in transgenic mice by expressing simian virus 40 T antigen under a 5.0-kb mouse glutathione peroxidase 5 promoter (GPX5-Tag1). Epididymal tumorigenesis was associated with an increase in c-Myc expression, and a marked decrease in B-Myc expression, with a 500-...

journal_title：Endocrinology

authors： Sipilä P,Shariatmadari R,Huhtaniemi IT,Poutanen M

更新日期：2004-01-01 00:00:00

abstract：:To study the physiological regulation of the iodothyronine 5'-deiodinases (I-5'D), we have examined the effects of some thiol blockers and of thyroid status on I-5'D activities both in vitro and in vivo. At low (less than 5 mM) concentrations of dithiothreitol, propylthiouracil (PTU) inhibited I-5'D in the brain, pitu...

journal_title：Endocrinology

authors： Goswami A,Rosenberg IN

更新日期：1990-05-01 00:00:00

abstract：:In several mammalian species, luteinizing hormone-releasing hormone (LHRH) neurons have been shown to migrate from nasal regions to the brain during early development. Using immunocytochemistry, we have identified LHRH containing neurons in developing chick embryos. In embryonic day 4 (E4) and E5 animals, a small grou...

journal_title：Endocrinology

authors： Norgren RB Jr,Lehman MN

更新日期：1991-03-01 00:00:00

abstract：:The structural requirements for the inhibition of net bone collagen synthesis by parathyroid hormone (PTH) in vitro have been examined by study of the effects of selected fragments and analogs of bovine PTH (bPTH) upon the incorporation of [3H]proline into collagenase-digestible and -nondigestible proteins by neonatal...

journal_title：Endocrinology

authors： Bringhurst FR,Potts JT Jr

更新日期：1981-01-01 00:00:00

abstract：:The CRH-binding protein (CRH-BP) antagonizes the ACTH-releasing activity of the neuropeptide CRH in vitro. However, the function of CRH-BP in vivo and the molecular mechanisms that regulate CRH-BP expression are not well understood. In this study, the rat CRH-BP gene was characterized, and CRH-BP promoter sequences we...

journal_title：Endocrinology

authors： Cortright DN,Goosens KA,Lesh JS,Seasholtz AF

更新日期：1997-05-01 00:00:00

abstract：:Anorexia is a debilitating manifestation of many malignancies. The etiology of cancer anorexia is poorly understood, and effective treatment options are limited. To investigate the role of central melanocortin receptor signaling in the pathogenesis of cancer anorexia, we assessed the effects on food intake of the mela...

journal_title：Endocrinology

authors： Wisse BE,Frayo RS,Schwartz MW,Cummings DE

更新日期：2001-08-01 00:00:00

abstract：:Characterization of glycoconjugates synthesized by polarized immature rabbit uterine epithelial (UE) cells in vitro, their vectorial patterns of secretion, and regulation by ovarian steroid hormones are reported. Large (mol wt, greater than 230 kDa) sialomucoglycoproteins and hyaluronate were primarily (86-96%) secret...

journal_title：Endocrinology

authors： Mani SK,Carson DD,Glasser SR

更新日期：1992-01-01 00:00:00

abstract：:Estrogens have pronounced effects on thermoregulation, as illustrated by the occurrence of hot flushes secondary to estrogen withdrawal in menopausal women. Because neurokinin B (NKB) gene expression is markedly increased in the infundibular (arcuate) nucleus of postmenopausal women, and is modulated by estrogen withd...

journal_title：Endocrinology

authors： Dacks PA,Krajewski SJ,Rance NE

更新日期：2011-12-01 00:00:00

abstract：:The purpose of this study is to establish a primary LHRH cell culture system using embryonic olfactory placode and to examine whether LHRH cells derived from olfactory placode and the migratory pathway of LHRH neurons mature in vitro. Six monkey fetuses at the ages of E34-E36 were delivered surgically and the area inc...

journal_title：Endocrinology

authors： Terasawa E,Quanbeck CD,Schulz CA,Burich AJ,Luchansky LL,Claude P

更新日期：1993-11-01 00:00:00

abstract：:Previous studies have shown that the adenylyl cyclase of intact granulosa cells from immature porcine follicles has a uniquely prolonged responsiveness to FSH and an atypically poor responsiveness to cholera toxin relative to other cells. The present studies were designed to determine if these characteristics were due...

journal_title：Endocrinology

authors： Hunzicker-Dunn M,LaBarbera AR

更新日期：1986-01-01 00:00:00

abstract：:With a recently developed microdissection technique, four circumventricular organs were removed from the rat brain, and their contents of LHRH and TRH were measured. The subfornical organ, the organon vasculosum lamia terminalis, the subcommissural organ, the area postrema all contained significant quantities of both ...

journal_title：Endocrinology

authors： Kizer JS,Palkovits M,Brownstein MJ

更新日期：1976-02-01 00:00:00

abstract：:Two experiments tested whether serotonergic neurons participate in the acute feedback effects of estradiol on LH and PRL secretion. In the first study, ovariectomized female rats received oil vehicle or estradiol benzoate and were killed 3 h later. The turnover of serotonin [5-hydroxytryptamine (5-HT)] in microdissect...

journal_title：Endocrinology

authors： Johnson MD,Crowley WR

更新日期：1983-12-01 00:00:00

abstract：:This study was aimed at testing the hypothesis that different forms of fibronectin (FN), produced as a consequence of the alternative splicing of the precursor messenger RNA, play specific roles during development of the ovarian follicle. In particular, we were interested in determining the effect of the ED-I (also te...

journal_title：Endocrinology

authors： Colman-Lerner A,Fischman ML,Lanuza GM,Bissell DM,Kornblihtt AR,Barañao JL

更新日期：1999-06-01 00:00:00

abstract：:Dispersed pancreatic islet cells were analyzed for their low forward angle light scatter using flow cytometry. The cells produced a distinct light scatter pattern which appeared to be a function of cell size and not cell granularity. RIA of hormone content of cells collected from different regions of the pattern revea...

journal_title：Endocrinology

authors： Fletcher DJ,Grogan WM,Barras E,Weir GC

更新日期：1983-11-01 00:00:00

abstract：:Although LHRH can stimulate the release of both LH and FSH from the pituitary, there are a number of instances in which the secretion of LH and FSH are divergent. Previous studies from our laboratory have indicated that pulsatile LH and FSH secretion are independently regulated by gonadal factors. We have, therefore, ...

journal_title：Endocrinology

authors： Culler MD,Negro-Vilar A

更新日期：1986-02-01 00:00:00

abstract：:Previous studies from our laboratory have demonstrated that epidermal growth factor (EGF), induces intracellular alkalinization in chicken granulosa cells by activating a sodium-dependent and amiloride-sensitive Na+/H+ antiporter. In the present investigation we have examined the possible involvement of protein kinase...

journal_title：Endocrinology

authors： Li M,Morley P,Tsang BK

更新日期：1991-12-01 00:00:00

abstract：:We investigated the contribution of corticotropin-releasing factor (CRF) receptors types 1 and 2 (CRF(1) and CRF(2)) in mediating the ACTH response to shock, alcohol injection, or endotoxemia in the rat. Peptidic (Astressin B and Astressin(2)-B) and nonpeptidic (NBI 30775) CRF antagonists were injected iv before the s...

journal_title：Endocrinology

authors： Rivier CL,Grigoriadis DE,Rivier JE

更新日期：2003-06-01 00:00:00

abstract：:Two isoforms of the GH receptor, the full-length receptor (GHRL) and a short isoform (GHRS) that lacks the transmembrane and intracellular domains of GHRL, have been analyzed in rat tissue extracts by Western blotting and immunoprecipitation. Although quantitative estimates of GHRS and GHRL based on coprecipitation of...

journal_title：Endocrinology

authors： Frick GP,Tai LR,Baumbach WR,Goodman HM

更新日期：1998-06-01 00:00:00