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	Provedor de dados BJMBR (2) Biocell (1) Biol. Res. (1) Autor Oliveira,M.C. (2) Barbosa-Coutinho,L. (1) Barbosa-Coutinho,L.M. (1) Corrêa,G. (1) Gonzales,P.H. (1) Lafarque,Martha (1) Luz,C. (1) Messinger,H.P. (1) Oliveros,Liliana (1) Rhoden,C.R. (1) STOJILKOVIC,STANKO S (1) Tannhauser,M. (1) Mais... Palavra-chave Lactotrophs (4) Somatotrophs (2) Action potentials (1) Adenohypophysis (1) Antidopaminergic drugs (1) BK channels (1) Estrogen (1) Exocytosis (1) Follicle stimulating hormone (1) GH3 cells (1) Gonadotropes (1) Gonadotrophs (1) Hyperestrogenemia (1) Hyperprolactinemia (1) Hypogonadism (1) Liver cirrhosis (1) Prolactin (1) SK channels (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Journal article (1) Ano 2008 (1) 2007 (1) 2006 (1) 1999 (1) País Brazil (2) Argentina (1) Chile (1) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última A 66-kDa protein of bovine hypophyseal Pars tuberalis induces luteinizing hormone release from rat Pars distalis Biocell Lafarque,Martha; Oliveros,Liliana. In this study, evidence for a factor secreted by bovine hypophyseal pars tuberalis that stimulates luteinizing hormone (LH) release from rat pars distalis cells is shown. The secretion products of bovine pars tuberalis cells into the culture medium were assayed on dispersed rat pars distalis cells in 30 min incubations and superfusion experiments. The culture medium from pars tuberalis total cell populations, added at a dose of 6 μg per tube, induced the greater LH release from pars distalis cells, without effect on follicle stimulating hormone (FSH) release. After pars tuberalis cells separation on a discontinuos Percoll gradient, only the culture medium of cells from 50 and 60% strength Percoll were able to release LH from rat pars distalis... Tipo: Info:eu-repo/semantics/article Palavras-chave: Adenohypophysis; Gonadotropes; Lactotrophs; Follicle stimulating hormone; Prolactin. Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452008000300001 Chronic effect of antidopaminergic drugs or estrogen on male Wistar rat lactotrophs and somatotrophs BJMBR Oliveira,M.C.; Messinger,H.P.; Tannhauser,M.; Barbosa-Coutinho,L.. The aim of the present study was to evaluate the effect of antidopaminergic agents on the somatotrophs in the presence of hyperprolactinemia. Adult male Wistar rats were divided into 6 groups: a control group and five groups chronically treated (60 days) with haloperidol, fluphenazine, sulpiride, metoclopramide or estrogen. Somatotrophs and lactotrophs were identified by immunohistochemistry and the data are reported as percent of total anterior pituitary cells counted. The drugs significantly increased the percentage of lactotrophs: control (mean ± SD) 21.3 ± 4.4, haloperidol 27.8 ± 2.2, fluphenazine 34.5 ± 3.6, sulpiride 32.7 ± 3.5, metoclopramide 33.4 ± 5.5 and estrogen 42.4 ± 2.8. A significant reduction in somatotrophs was observed in animals treated... Tipo: Info:eu-repo/semantics/article Palavras-chave: Somatotrophs; Lactotrophs; Estrogen; Antidopaminergic drugs. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001200018 Male gonadal function, prolactin secretion and lactotroph population in an experimental model of cirrhosis BJMBR Gonzales,P.H.; Rhoden,C.R.; Luz,C.; Corrêa,G.; Barbosa-Coutinho,L.M.; Oliveira,M.C.. Liver cirrhosis, a highly prevalent chronic disease, is frequently associated with endocrine dysfunctions, notably in the gonadal axis. We evaluated lactotroph population by immunohistochemistry, gonadotropins and prolactin by immunoradiometric assay and testosterone and estradiol by radioimmunoassay in adult male Wistar rats with cirrhosis induced by carbon tetrachloride. No significant difference in mean ± SEM percentages of lactotrophs was found between cirrhotic animals and controls (N = 12, mean 18.95 ± 1.29%). Although there was no significant difference between groups in mean serum levels of prolactin (control: 19.2 ± 4 ng/mL), luteinizing hormone (control: 1.58 ± 0.43 ng/mL), follicle-stimulating hormone (control: 19.11 ± 2.28 ng/mL), estradiol... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hypogonadism; Hyperestrogenemia; Hyperprolactinemia; Lactotrophs; Liver cirrhosis. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007001000011 Pituitary cell type-specific electrical activity, calcium signaling and secretion Biol. Res. STOJILKOVIC,STANKO S. All secretory anterior pituitary cells exhibit spontaneous and extracellular calcium-dependent electrical activity, but differ with respect to the patterns of firing and associated calcium signaling and hormone secretion. Thus, somatotrophs and lactotrophs fire plateau-bursting action potentials spontaneously and without coupling to calcium release from intracellular stores, which generate calcium signals of sufficient amplitude to keep steady hormone release. In these cells, both spontaneous electrical activity and basal hormone secretion can be further amplified by activation of Gq/11 and Gs-coupled receptors and inhibited by Gi/o/z-coupled receptors. In contrast, gonadotrophs fire single, high-amplitude spikes with limited ability to promote calcium... Tipo: Journal article Palavras-chave: Somatotrophs; Lactotrophs; Gonadotrophs; GH3 cells; SK channels; BK channels; Action potentials; Exocytosis. Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000300004 Registros recuperados: 4 Primeira ... 1 ... Última

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