Abstract:
OBJECTIVE:To examine local actions of nitric oxide (NO) on the neural mechanisms controlling the release of vasopressin (AVP) and the cardiovascular system in the anteroventral third ventricular region (AV3V), a pivotal area for autonomic functions, and to pursue the problem of whether it may have any role in the AVP and cardiovascular responses evoked by plasma hypertonicity or by increased prostaglandin E(2) (PGE(2)) in the AV3V - one possible factor implicated in osmotic responses. METHODS:We infused NO-related agents into the AV3V, its adjacent area, the nucleus of the vertical limb of the diagonal band (VDB), or into the lateral cerebral ventricle of conscious rats, monitoring effects on plasma AVP, osmolality, sodium, potassium and chloride, arterial pressure and heart rate in the presence or absence of an osmotic or PGE(2) stimulus. The infusion sites were determined histologically. RESULTS:Infusion of L-arginine, the substrate of NO synthase (NOS), into the AV3V structures such as the median preoptic nucleus and periventricular nucleus produced dose-related increases in plasma AVP, arterial pressure and heart rate 5 or 15 min later, whereas infusion of D-arginine (which is not a substrate for NO synthesis) was without significant effect on these variables. Plasma osmolality or electrolytes were not changed by these treatments. The AV3V infusion of sodium nitroprusside (SNP), a spontaneous releaser of NO, also induced dose-dependent augmentations of plasma AVP, without evoking remarkable alteration in the cardiovascular parameters. The infusion of L- or D-arginine into the VDB affected none of the variables significantly. When applied intracerebroventricularly, L-arginine caused only increases in plasma AVP, whereas SNP caused only reductions in arterial pressure, leaving other variables at stable values. The effects of AV3V L-arginine on plasma AVP and the cardiovascular variables were abolished by N(G)-nitro-L-arginine methyl ester (L-NAME), a potent inhibitor of NOS, applied 15 min before. In contrast, infusion of L-NAME to the AV3V did not exert a significant effect on the responses of plasma AVP or cardiovascular variables to AV3V application of PGE(2) or i.v. infusion of hypertonic NaCl. The infusion of L-NAME alone did not affect plasma variables including AVP, although it tended to increase basal arterial pressure and heart rate. CONCLUSION:These results suggest that NO generated in or near the AV3V may act to enhance AVP release, arterial pressure and heart rate, but it may not play an essential role in eliciting the responses of these variables to osmotic or PGE(2) stimuli.
journal_name
Eur J Endocrinoljournal_title
European journal of endocrinologyauthors
Yamaguchi K,Watanabe K,Yamaya Kdoi
10.1530/eje.0.1430523subject
Has Abstractpub_date
2000-10-01 00:00:00pages
523-33issue
4eissn
0804-4643issn
1479-683Xpii
1430523journal_volume
143pub_type
杂志文章abstract:OBJECTIVE:Changes in many gastrointestinal peptides, including the anorexigenic peptide YY (PYY), which is produced by L cells, occur in both anorexia nervosa (AN) and obesity (OB). High PYY levels are present in AN, whereas in morbid OB fasting and postprandial PYY secretion is blunted. Somatostatin (somatotropin rele...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-11-0312
更新日期:2011-09-01 00:00:00
abstract:OBJECTIVE:Thyroid function parameters have been associated with obesity, but associations with the type of adiposity have not been examined. We used ultrasound (US) to assess regional adiposity and investigated associations of thyroid function with parameters of central obesity. DESIGN:Cross-sectional study. METHODS:...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0441
更新日期:2009-09-01 00:00:00
abstract::Bone mineral density (BMD), bone mineral content and body composition were determined in 47 middle-aged (mean age 47.9 +/- 1.1 years) women with Turner's syndrome. Bone mineral density was measured in the forearm, femoral neck and total body. The women investigated had a BMD lower than the normal mean. When expressed ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1320047
更新日期:1995-01-01 00:00:00
abstract:OBJECTIVE:The aim of the present study was to investigate whether patients with cystic fibrosis (CF) are GH resistant with increased GH release and decreased concentrations of IGF-I as a result of malabsorption, increased catabolism and impaired glucose tolerance. DESIGN:Twenty CF patients were included, ten with norm...
journal_title:European journal of endocrinology
pub_type: 临床试验,杂志文章
doi:10.1530/eje.0.1400315
更新日期:1999-04-01 00:00:00
abstract::The two pituitary gonadotrophins, luteinizing hormone (LH) and follicle-stimulating hormone (FSH), and in particular LH-stimulated high intratesticular testosterone (ITT) concentration, are considered crucial for spermatogenesis. We have revisited these concepts in genetically modified mice, one being the LH receptor ...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-18-0396
更新日期:2018-09-01 00:00:00
abstract:OBJECTIVE:A sex determining gene(s) has been mapped to a approximately 700 kb region distal to the exons of DMRT1 on 9p. The aim of this study was to examine gonadal developmental status in XX patients hemizygous for the 9p sex determining region. DESIGN:Clinical and molecular studies were performed in an 8-year-old g...
journal_title:European journal of endocrinology
pub_type: 临床试验,杂志文章
doi:10.1530/eje.0.1450613
更新日期:2001-11-01 00:00:00
abstract:INTRODUCTION:Activating mutations of the BRAF oncogene are frequently detected in papillary thyroid carcinoma (PTC) and have been associated with a worse prognosis. The amino acid substitution V600E accounts for 90% of all oncogenic BRAF mutations and is typically detected in classic PTCs, whereas other less frequent B...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-08-0239
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:Polycystic ovarian syndrome (PCOS) is associated with skeletal muscle insulin resistance (IR), which has been linked to decreased mitochondrial function. We measured mitochondrial respiration in lean and obese women with and without PCOS using high-resolution respirometry. METHODS:Hyperinsulinemic-euglycemic...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-11-0419
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND:Ghrelin stimulates GH secretion and regulates energy and glucose metabolism. The two circulating isoforms, acyl (AG) and des-acyl (DAG) ghrelin, have distinct metabolic effects and are under active investigation for their therapeutic potentials. However, there is only limited data on the pharmacokinetics of ...
journal_title:European journal of endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1530/EJE-13-0072
更新日期:2013-05-02 00:00:00
abstract:Aim:To establish pancreatic alpha-cell mass in lean, non-diabetic humans over the adult lifespan, performed as a follow-up study to beta-cell mass across the adult human lifespan. Methods:We examined human pancreatic autopsy tissue from 66 lean, non-diabetic individuals aged from 30 to 102 years, grouped into deciles:...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-19-0844
更新日期:2020-02-01 00:00:00
abstract::The relationship between calcitrophic hormones and blood pressure has been investigated in 583 elderly subjects who were untreated for hypertension. Univariate analysis demonstrated that serum parathyroid hormone, calcitriol, albumin and calcium were correlated significantly with mean blood pressure (r = +0.15, +0.10,...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1300446
更新日期:1994-05-01 00:00:00
abstract:OBJECTIVE:HRPT2 gene mutations are associated with parathyroid carcinomas, and absence of parafibromin immunoreactivity has been suggested as a diagnostic marker of malignancy. The aim of our study was to extend parafibromin studies in a series of benign and malignant parathyroid tumors and cross-validate the results o...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-06-0720
更新日期:2007-05-01 00:00:00
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
更新日期:2009-02-01 00:00:00
abstract:OBJECTIVE:Paraoxonase-1 (PON-1), which has PON and arylesterase activities, is a high-density lipoprotein (HDL)-bound antioxidant enzyme that inhibits atherosclerosis. Diabetes has been shown to have an impact on oxidative stress. The effect of metabolic syndrome (MetS) on oxidative stress and PON-1 has been shown befo...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0732
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND:The iodine supply of the population in Berlin has normalized during the last 5 Years. Therefore autoimmune thyroiditis has become the most important differential diagnosis in children and adolescents with goiter. OBJECTIVE:The aim of the present study was to define the prevalence of anti-thyroid peroxidase ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1480301
更新日期:2003-03-01 00:00:00
abstract:BACKGROUND:The purpose of this study was to assess changes in the cross-sectional area (CSA) of nervus medianus by ultrasound in newly diagnosed primary hypothyroid patients after thyroxine replacement treatment. PATIENTS AND METHODS:The cohort comprised 30 patients with newly diagnosed primary autoimmune hypothyroidi...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-16-0397
更新日期:2016-10-01 00:00:00
abstract:OBJECTIVE:To determine if human growth hormone (hGH) replacement therapy alters pharmacokinetics of hydrocortisone (CS) substitution in hypopituitary adults. DESIGN:To this aim, we analysed serum and salivary CS profiles 270 min after oral CS administration at baseline and 6 and 12 months after initiation of hGH repla...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1430769
更新日期:2000-12-01 00:00:00
abstract::Objective Pituitary adenoma MRI T2 signal intensity associates with tumor characteristics including responsiveness to somatostatin analogs (SSAs). These analyses determined whether baseline T2 signal intensity predicts response to primary medical treatment with long-acting SSA. Design Post-hoc analyses of the prospect...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-18-0254
更新日期:2018-12-01 00:00:00
abstract:OBJECTIVE:To evaluate the effect of the growth factor activin A on the secretion of prolactin (PRL) and GH in cultured GH3 cells. METHODS:The concentrations of PRL and GH secreted from GH3 cells cultured in media with and without activin A were measured by RIA, and the expression of PRL mRNA and GH mRNA were analyzed ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1420506
更新日期:2000-05-01 00:00:00
abstract:OBJECTIVE:TSH-secreting pituitary tumors (TSH-omas) are a rare cause of hyperthyroidism and account for <1% of all pituitary adenomas. Failure to recognize the presence of a TSH-oma may result in dramatic consequences such as thyroid ablation that may cause further growth in pituitary tumor. The primary goal of the tre...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-07-0098
更新日期:2007-07-01 00:00:00
abstract::Fifty-five patients with adult-onset GH deficiency (mean age, 49 years) were enrolled in a placebo-controlled, crossover study to investigate the effects of GH therapy on exercise capacity, body composition, and quality of life (QOL). GH and placebo were administered for 9 months each, separated by a 4-month washout p...
journal_title:European journal of endocrinology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1530/eje.1.01971
更新日期:2005-09-01 00:00:00
abstract:OBJECTIVE:Surgery remains a common form of treatment for sellar and parasellar tumors involving the pituitary gland and adjacent structures. Studies have suggested that pituitary surgery procedures performed at high-volume centers are associated with less adverse outcomes, yet it remains unclear which types of patients...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0043
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVE:Mutations in HESX1 represent a rare cause of GH deficiency (GHD) associated with a broad spectrum of other anomalies. We searched for causative mutations in a cohort of 244 Italian patients affected by combined and isolated GHD (IGHD). METHODS:The HESX1 gene-coding region and exon-intron boundaries were scre...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-11-0047
更新日期:2011-05-01 00:00:00
abstract:BACKGROUND:Survival rates among childhood cancer survivors (CCS) have enormously increased in the last 40 years. However, this improvement has been achieved at the expense of serious late effects that frequently involve the endocrine system. AIM:To evaluate the cumulative incidence of endocrine diseases in a cohort of...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-12-1043
更新日期:2013-02-20 00:00:00
abstract:Objective:Hypertension and symptoms of catecholamine excess are features of pheochromocytomas and paragangliomas (PPGLs). This prospective observational cohort study assessed whether differences in presenting features in patients tested for PPGLs might assist establishing likelihood of disease. Design and methods:Pati...
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-19-0159
更新日期:2019-10-01 00:00:00
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
更新日期:2002-04-01 00:00:00
abstract:OBJECTIVE:Untreated hypothyroidism is common in iodine-replete areas. Frequent thyroid function testing and use of levothyroxine treatment for subclinical hypothyroidism suggest that the prevalence may have decreased. Therefore, in this study, we examined changes in the prevalence of hypothyroidism in a Norwegian count...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-13-0459
更新日期:2013-10-01 00:00:00
abstract:OBJECTIVE:Endoscopic ultrasound (EUS) is a highly reliable procedure to localize insulinomas preoperatively. It has been considered to be important in planning surgical strategy, especially considering a minimal invasive approach. However, even under ideal conditions experienced examiners miss about 10-20% of insulinom...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-07-0117
更新日期:2007-08-01 00:00:00
abstract:OBJECTIVES:Our aim was to analyze a large cohort of childhood onset GH deficiency (CO-GHD) adults from a unique adult center, in order to analyze their clinical management and to study the metabolic and bone status in relation to GHD and to the other pituitary deficits, and to evaluate these parameters during the long-...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-13-0572
更新日期:2013-10-01 00:00:00
abstract::Biosynthesis of iodothyronines in thyroglobulin occurs by oxidative coupling of two iodotyrosine residues catalyzed by thyroperoxidase. To study the mechanism of iodothyronine formation, iodine-free thyroglobulin was non-enzymatically iodinated and after removal of non-incorporated iodide, incubated with lactoperoxida...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1380227
更新日期:1998-02-01 00:00:00