Calcium mobilization is a prerequisite for the expression of phorbol ester-stimulated luteinizing hormone secretion from pituitaries of male and acutely ovariectomized rats.

Abstract:

:Ionomycin, which mobilizes Ca2+, and phorbol 12-myristate 13-acetate (PMA), which activates protein kinase C (PKC), were used to compare the effects/interactions of Ca2+ and PKC on luteinizing hormone (LH) secretion from pituitaries of intact male and acutely ovariectomized (72 h) rats. Quartered pituitaries from donor animals were perifused at 0.25 ml/min and sequential effluent fractions were collected every 10 min. Continuous administration (4 h) of 1 nmol of gonadotropin-releasing hormone (GnRH) resulted in an increase in LH secretion. Cycloheximide (5 mumol) dissociated the GnRH-stimulated LH responses into protein synthesis-independent and -dependent components. While ionomycin (10 mumol) stimulated LH secretion from pituitaries of both sexes by protein synthesis-independent mechanisms, PMA (1 mumol) and the inactive phorbol ester, 4 alpha-phorbol 12,13-didecanoate (PDD), were ineffective secretagogues. However, PMA (but not PDD) interacted synergistically with ionomycin and GnRH to augment LH secretion by protein synthesis-dependent mechanisms. These results suggest a similarity in the effects/interactions of Ca2+ and PKC in gonadotropes from male and ovariectomized rats. If the effects of PMA can be attributed to PKC activation, then it also appears that Ca2+ mobilization is necessary for the manifestation of PKC as a mediator of LH secretion from these gonadotropes. While PKC activity can be divorced from the protein synthesis-independent component of LH release (this component appears to be mediated by Ca2+ mobilization), the enzyme might be involved in amplifying the response to Ca2+ mobilization through synergistic protein synthesis-dependent mechanisms.

journal_name

Eur J Endocrinol

authors

Das S,Fahmy NW,Bourne GA

doi

10.1530/eje.0.1300151

subject

Has Abstract

pub_date

1994-02-01 00:00:00

pages

151-8

issue

2

eissn

0804-4643

issn

1479-683X

journal_volume

130

pub_type

杂志文章
  • Prognostic relevance of proliferation-related miRNAs in pancreatic neuroendocrine neoplasms

    abstract:Objective:Pancreatic neuroendocrine neoplasms (PanNENs) are rare tumors arising from the endocrine pancreas; however, their prognosis differs significantly upon their proliferative state, which is characterized by histopathological grading. MiRNAs are small, noncoding RNAs posttranscriptionally regulating gene expressi...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-18-0305

    authors: Grolmusz VK,Kövesdi A,Borks K,Igaz P,Patócs A

    更新日期:2018-10-01 00:00:00

  • Three-month sustained-release triptorelin (11.25 mg) in the treatment of central precocious puberty.

    abstract:OBJECTIVE:Depot GnRH agonists are commonly used in the treatment of central precocious puberty (CPP). The triptorelin 11.25 mg 3-month depot, currently used in adult indications, had not previously been evaluated in CPP. DESIGN:This was a multicenter, open-label, 12 month trial conducted in 64 CPP children (54 girls a...

    journal_title:European journal of endocrinology

    pub_type: 临床试验,杂志文章,多中心研究

    doi:10.1530/eje.1.02056

    authors: Carel JC,Blumberg J,Seymour C,Adamsbaum C,Lahlou N,Triptorelin 3-month CPP Study Group.

    更新日期:2006-01-01 00:00:00

  • Effect of chronic thyroxine treatment on IGF-I, IGF-II and IGF-binding protein expression in mammary gland and liver during pregnancy and early lactation in rats.

    abstract:OBJECTIVE:Hyperthyroidism in rats produces organ hypertrophy and increases in circulating IGF-I and IGF-binding protein (IGFBP)-3. Chronic treatment with thyroxine (T(4)) during pregnancy advances parturition, blocks lactation and changes several hormone receptors in mammary gland and liver. Since IGFs are implicated i...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1460729

    authors: Rosato R,Lindenbergh-Kortleve D,Neck Jv,Drop S,Jahn G

    更新日期:2002-05-01 00:00:00

  • Identification of a deletion variant in the gene encoding the human alpha(2A)-adrenergic receptor.

    abstract:OBJECTIVE:The alpha(2)-adrenergic receptors are involved in the effects of catecholamines on energy metabolism. Of three known subtypes with differential expression, alpha(2A)-adrenergic receptors are also localized in adipose tissue where they counteract the lipolytic activity of beta-adrenergic receptors. This study ...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1440291

    authors: Hamann A,Brieske C,Tafel J,Buttron P,Schwarzloh B,Münzberg H,Hinney A,Mayer H,Siegfried W,Hebebrand J,Greten H,Algenstaedt P,Ziegler R

    更新日期:2001-03-01 00:00:00

  • Morbidity and GH deficiency: a nationwide study.

    abstract:OBJECTIVE:To estimate morbidity in Denmark in all patients with GH deficiency (GHD). DESIGN:Morbidity was analyzed in 1794 GHD patients and 8014 controls matched on age and gender. All records in the GHD patients were studied and additional morbidity noted. Diagnoses and dates of admissions were identified in the Nati...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-07-0523

    authors: Stochholm K,Laursen T,Green A,Laurberg P,Andersen M,Kristensen LØ,Feldt-Rasmussen U,Christiansen JS,Frydenberg M,Gravholt CH

    更新日期:2008-04-01 00:00:00

  • Evidence for a role for insulin-like growth factor binding proteins in glucocorticoid inhibition of normal human osteoblast-like cell proliferation.

    abstract::Glucocorticoids (GCs) inhibit bone formation in vivo and inhibit osteoblast proliferation and collagen synthesis in vitro. These effects may be mediated by alterations in the insulin-like growth factor (IGF) system. In the present study of normal human osteoblast-like (HOB) cells, we tested the hypothesis that dexamet...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1340591

    authors: Chevalley T,Strong DD,Mohan S,Baylink D,Linkhart TA

    更新日期:1996-05-01 00:00:00

  • Binding of heparin to human thyroglobulin (Tg) involves multiple binding sites including a region corresponding to a binding site of rat Tg.

    abstract:OBJECTIVE:Binding of thyroglobulin (Tg) to heparin allows efficient Tg interaction with its endocytic receptor, megalin. Rat Tg (rTg) binds to heparin using an exposed carboxyl terminal region (RELPSRRLKRPLPVK, Arg2489-Lys2503) rich in positively charged residues which is, however, not entirely conserved in human Tg (h...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1460591

    authors: Lisi S,Pinchera A,McCluskey RT,Chiovato L,Marinò M

    更新日期:2002-04-01 00:00:00

  • Increased reverse triiodothyronine is associated with shorter survival in independently-living elderly: the Alsanut study.

    abstract:OBJECTIVE:Increased reverse tritiodothyronine (T(3)) used to be described as a part of euthyroid sick syndrome (ESS). It was demonstrated to be associated with increased mortality in acutely ill patients. It can also be found with low or normal T(3) in non-severely ill subjects but its significance remains unclear. PA...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-08-0519

    authors: Forestier E,Vinzio S,Sapin R,Schlienger JL,Goichot B

    更新日期:2009-02-01 00:00:00

  • Concurrent FOXP3- and CTLA4-associated genetic predisposition and skewed X chromosome inactivation in an autoimmune disease-prone family.

    abstract::CLTA4 is relevant for FOXP3(+)Treg cells, and the link between skewed X chromosome inactivation (XCI) and autoimmunity is recognized. The observation of immune dysregulation polyendocrinopathy enteropathy X-linked syndrome and multiorgan endocrine autoimmune phenomena in various members of one family, associated with ...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-12-0197

    authors: Seidel MG,Rami B,Item C,Schober E,Zeitlhofer P,Huber WD,Heitger A,Bodamer OA,Haas OA

    更新日期:2012-07-01 00:00:00

  • Is surgery necessary for 'mild' or 'asymptomatic' hyperparathyroidism?

    abstract::A large majority of the currently diagnosed patients with hyperparathyroidism (PHPT) are mild or asymptomatic, mainly women after menopause. Following the debate held at the 16th European Congress of Endocrinology in Wroclaw (Poland) from May 3-7, 2014, arguments are here presented by a surgeon and a medical practitio...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-15-0277

    authors: Niederle B,Wémeau JL

    更新日期:2015-09-01 00:00:00

  • Role of gamma probes in performing minimally invasive parathyroidectomy in patients with primary hyperparathyroidism: optimization of preoperative and intraoperative procedures.

    abstract:OBJECTIVE:In the last decade, surgery of primary hyperparathyroidism (HPT) due to a solitary adenoma has moved on from the traditional wide bilateral neck exploration (BNE) to more limited approaches such as unilateral neck exploration and minimally invasive parathyroidectomy. DESIGN:To define the role of intraoperati...

    journal_title:European journal of endocrinology

    pub_type: 临床试验,杂志文章

    doi:10.1530/eje.0.1490007

    authors: Rubello D,Piotto A,Casara D,Muzzio PC,Shapiro B,Pelizzo MR

    更新日期:2003-07-01 00:00:00

  • Osteoporosis and male age-related hypogonadism: role of sex steroids on bone (patho)physiology.

    abstract::Male age-related bone loss is caused, at least in part, by hypogonadism that occurs with advancing age. The study of the effects of sex steroids on bone physiology in men has recently highlighted the central role of estrogens on bone pathophysiology. This review focuses on particular aspects of bone physiology and pat...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章,评审

    doi:10.1530/eje.1.02088

    authors: Rochira V,Balestrieri A,Madeo B,Zirilli L,Granata AR,Carani C

    更新日期:2006-02-01 00:00:00

  • Effects of dehydration on endocrine regulation of the electrolyte and fluid balance and atrial natriuretic peptide-binding sites in perinatally malnourished adult male rats.

    abstract:OBJECTIVE:The first aim of this work was to investigate, under basal conditions in adult male rats, the long-term consequences of perinatal maternal food restriction on the plasma concentrations of vasopressin (VP), aldosterone and atrial natriuretic peptide (ANP) and on plasma renin activity (PRA). Furthermore, under ...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1470835

    authors: Sebaai N,Lesage J,Alaoui A,Dupouy JP,Deloof S

    更新日期:2002-12-01 00:00:00

  • The impact of levothyroxine sodium treatment on oxidative stress in Hashimoto's thyroiditis.

    abstract:OBJECTIVE:Although several studies reported increased oxidative stress in Hashimoto's thyroiditis (HT), the effect of levothyroxine treatment on oxidative status is not studied extensively. Therefore, we conducted this study to investigate the effects of levothyroxine replacement on oxidative stress in HT. DESIGN AND ...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-15-1061

    authors: Ates I,Altay M,Yilmaz FM,Topcuoglu C,Yilmaz N,Berker D,Guler S

    更新日期:2016-06-01 00:00:00

  • Selective parathyroid venous sampling in patients with complicated hyperparathyroidism.

    abstract:OBJECTIVE:The role of preoperative localisation of abnormal parathyroid glands remains controversial but is particularly relevant to the management of patients with recurrent or persistent hyperparathyroidism and familial syndromes. We report our experience of the use of selective parathyroid venous sampling (PVS) in t...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.1.02304

    authors: Ogilvie CM,Brown PL,Matson M,Dacie J,Reznek RH,Britton K,Carpenter R,Berney D,Drake WM,Jenkins PJ,Chew SL,Monson JP

    更新日期:2006-12-01 00:00:00

  • Some studies on the natural history of Graves' orbitopathy: increase in orbital fat is a rather late phenomenon.

    abstract:AIM:To describe volumes of orbital fat (FV) and extraocular muscles (MV) in Graves' orbitopathy (GO) as a function of the duration of GO. PATIENTS:i) Cross-sectional survey among 95 consecutive patients with untreated GO who had been referred to the combined thyroid-eye clinics of our university hospital. ii) Longitud...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-14-1140

    authors: Potgieser PW,Wiersinga WM,Regensburg NI,Mourits MP

    更新日期:2015-08-01 00:00:00

  • Serum levels of 3alpha-androstanediol glucuronide in hirsute and non hirsute women.

    abstract::This study has evaluated the behaviour of 3alpha-androstanediol glucuronide (3alpha-diol G) in 170 women of whom 85 had polycystic ovary syndrome (PCOS), 35 had idiopathic hirsutism (IH) and 50 had regular cycles (control group). Of the women with PCOS, 45 were hirsute (PCOS-H) and 40 were non hirsute (PCOS-NH). Women...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1380421

    authors: Falsetti L,Rosina B,De Fusco D

    更新日期:1998-04-01 00:00:00

  • Childhood thyroid function, body composition and cardiovascular function.

    abstract:OBJECTIVE:The cardiovascular system is a known target for thyroid hormone. Early-life cardiovascular alterations may lead to a higher risk of cardiovascular disease in adulthood. Little is known about the effects of thyroid hormone on cardiovascular function during childhood, including the role of body composition in t...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-17-0369

    authors: Barjaktarovic M,Korevaar TIM,Gaillard R,de Rijke YB,Visser TJ,Jaddoe VWV,Peeters RP

    更新日期:2017-10-01 00:00:00

  • Testosterone replacement therapy in men who conceived with intracytoplasmic sperm injection: nationwide register study.

    abstract:Objectives:Male hypogonadism is associated with higher risk of co-morbidity and premature mortality. It is, therefore, of utmost importance to identify young men who are at the highest risk of testosterone deficiency and who may benefit from preventive measures. In this context, infertile men constitute a high-risk gro...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-19-0734

    authors: Elenkov A,Al-Jebari Y,Giwercman YL,Giwercman A

    更新日期:2020-04-01 00:00:00

  • Glycoprotein hormone alpha-subunit production and plurihormonality in human corticotroph tumours--an in vitro and immunohistochemical study.

    abstract::Glycoprotein hormone alpha-subunit (alpha SU) is a recognized product of clinically non-functioning, glycoprotein hormone-secreting and somatotroph adenomas but has not been studied systematically in corticotroph tumours. We have performed immunohistochemistry for alpha SU in a consecutive series of four corticotroph ...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1330025

    authors: Desai B,Burrin JM,Nott CA,Geddes JF,Lamb EJ,Aylwin SJ,Wood DF,Thakkar C,Monson JP

    更新日期:1995-07-01 00:00:00

  • Neutrophil:lymphocyte ratio is positively related to type 2 diabetes in a large-scale adult population: a Tianjin Chronic Low-Grade Systemic Inflammation and Health cohort study.

    abstract:AIM:It is widely known that inflammation is related to type 2 diabetes (T2D), but few studies have shown a direct relationship between the immune system and T2D using a reliable biomarker. Neutrophil:lymphocyte ratio (NLR) is an easy-to-analyze inflammation biomarker, but few studies have assessed the relationship betw...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章,随机对照试验

    doi:10.1530/EJE-15-0176

    authors: Guo X,Zhang S,Zhang Q,Liu L,Wu H,Du H,Shi H,Wang C,Xia Y,Liu X,Li C,Sun S,Wang X,Zhou M,Huang G,Jia Q,Zhao H,Song K,Niu K

    更新日期:2015-08-01 00:00:00

  • Thyroglobulin measurement using highly sensitive assays in patients with differentiated thyroid cancer: a clinical position paper.

    abstract::Differentiated thyroid cancer (DTC) is the most common endocrine cancer and its incidence has increased in recent decades. Initial treatment usually consists of total thyroidectomy followed by ablation of thyroid remnants by iodine-131. As thyroid cells are assumed to be the only source of thyroglobulin (Tg) in the hu...

    journal_title:European journal of endocrinology

    pub_type: 共识发展会议,杂志文章,评审

    doi:10.1530/EJE-14-0148

    authors: Giovanella L,Clark PM,Chiovato L,Duntas L,Elisei R,Feldt-Rasmussen U,Leenhardt L,Luster M,Schalin-Jäntti C,Schott M,Seregni E,Rimmele H,Smit J,Verburg FA

    更新日期:2014-08-01 00:00:00

  • Diabetes insipidus and use of desmopressin (Minirin) during pregnancy.

    abstract::With the use of two central health registries in Sweden, the Hospital Discharge Registry and the Medical Birth Registry, we identified 100 infants born of women who had been hospitalized for diabetes insipidus. By checking the medical records of these women, 29 infants were identified whose mothers had diabetes insipi...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1320144

    authors: Källén BA,Carlsson SS,Bengtsson BK

    更新日期:1995-02-01 00:00:00

  • The GH/IGF-I axis and longevity.

    abstract::Several converging lines of evidence obtained over the last years in a wide variety of experimental model organisms suggest that the ageing process is regulated by genes that encode proteins from the somatotroph axis: longevity genes like daf-2, which were identified using mutant Caenorhabditis elegans strains, turned...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.151s023

    authors: Holzenberger M

    更新日期:2004-08-01 00:00:00

  • In vitro and in vivo herpetic vector-mediated gene transfer in the pituitary gland: impact on hormone secretion.

    abstract:OBJECTIVE:Herpes simplex virus type 1 (HSV-1)-derived vectors are known to be effective tools to deliver transgenes into normal and neoplastic anterior pituitary (AP) cells in vitro. Our objective was to assess the in vitro and in vivo effects of tsK/beta-gal, a temperature-sensitive HSV-1-derived vector harbouring the...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1450497

    authors: Bolognani F,Albariño C,Romanowski V,Carri NG,Goya RG

    更新日期:2001-10-01 00:00:00

  • Possible delayed diagnosis and treatment of metastatic differentiated thyroid cancer by adopting the 2015 ATA guidelines.

    abstract:OBJECTIVE:According to the 2015 American Thyroid Association (ATA) guidelines, thyroid ablation by iodine-131 (I-131) therapy is absolutely recommended only in patients with high-risk differentiated thyroid cancer (DTC). Often distant metastases are not recognized early and they can stay silent for long time. The aim o...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/EJE-18-0253

    authors: Albano D,Bertagna F,Bonacina M,Durmo R,Cerudelli E,Gazzilli M,Panarotto MB,Formenti AM,Mazziotti G,Giustina A,Giubbini R

    更新日期:2018-09-01 00:00:00

  • A perspective on stem cells by a clinician.

    abstract::Stem cell terminology has entered the lexicon of medical practitioners even though the application of harvesting stem cells to treat diseases other than haematological disorders is not yet a reality in clinical practice. All branches of medicine will be affected by the new technology, more so those related to regenera...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.151u003

    authors: Hughes IA

    更新日期:2004-11-01 00:00:00

  • Serum leptin and habitual fatty acid dietary intake in patients with type 1 diabetes mellitus.

    abstract:OBJECTIVE:To study the contribution of a normal intake of nutrients to the variability of serum leptin concentrations in persons with type 1 diabetes mellitus. DESIGN:We studied the relation between serum leptin and nutrient intake in a cross-sectional study. METHODS:Serum leptin measured by radioimmunoassay, nutriti...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1420263

    authors: Rojo-Martínez G,Soriguer FJ,González-Romero S,Tinahones F,Moreno F,de Adana SR,Garriga MJ,Esteva I,García-Arnés J,Gómez-Zumaquero JM,García-Almeida JM

    更新日期:2000-03-01 00:00:00

  • Influence of renal function on clinico-pathological features of primary hyperparathyroidism.

    abstract:OBJECTIVE:Disturbed renal function may play an important role in the clinico-pathological presentation of primary hyperparathyroidism (pHPT). We studied the influence of renal function on the clinico-pathological characteristics of 141 patients (123 women and 18 men) with surgically proven pHPT. METHODS:The 141 patien...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1480597

    authors: Yamashita H,Noguchi S,Uchino S,Watanabe S,Murakami T,Ogawa T,Masatsugu T,Takamatsu Y,Miyatake E,Yamashita H

    更新日期:2003-06-01 00:00:00

  • Interactions of insulin-like growth factor-I, insulin and estradiol with GnRH-stimulated luteinizing hormone release from female rat gonadotrophs.

    abstract:BACKGROUND:It is well established that ovarian steroids modulate gonadotropin secretion from anterior pituitary cells. It has been speculated that insulin and IGF-I might influence gonadotropin secretion. OBJECTIVE:To investigate the effects of IGF-I and estradiol alone, or combinations of IGF-I with insulin and estra...

    journal_title:European journal of endocrinology

    pub_type: 杂志文章

    doi:10.1530/eje.0.1440073

    authors: Xia YX,Weiss JM,Polack S,Diedrich K,Ortmann O

    更新日期:2001-01-01 00:00:00