Abstract:
:The effects of estriol on serum prolactin (PRL) and LH levels, on the pituitary response to TRH and LHRH and on the synthesis and release of PRL from the anterior pituitary gland were investigated in female rats. The increase of serum PRL levels after estradiol administration was found to be associated with an increase of glutamic acid decarboxylase (GAD) and GABA-transaminase (GABA-T) in the hypothalamus. Thus, a study was carried out on the effects of estradiol and estriol on PRL secretion and on GAD, GABA-T and gamma-amino butyric acid (GABA) in the hypothalamus and the anterior pituitary. Under basal and TRH-stimulated conditions, estriol increased serum PRL levels, decreased basal serum LH levels, and increased the response to LHRH, in terms of LH release. Estradiol and estriol increased the synthesis and release of 3H-PRL from hemipituitary glands in incubations of pretreated animals. Both estrogens induced hyperprolactinemia, concomitantly with an increase of hypothalamic GAD and GABA-T activity. Estriol increased hypothalamic GABA concentration, but did not modify GABA concentration in the pituitary glands. Our results show that estriol, at relatively high doses, seems to be active in increasing PRL synthesis and release and in decreasing serum LH levels; it can also modify pituitary response to TRH and LHRH stimulation.
journal_name
J Endocrinol Investjournal_title
Journal of endocrinological investigationauthors
Diaz MC,Seilicovich A,Duvilanski BH,Siseles N,Lasaga M,Debeljuk Ldoi
10.1007/BF03349902subject
Has Abstractpub_date
1989-01-01 00:00:00pages
1-7issue
1eissn
0391-4097issn
1720-8386journal_volume
12pub_type
杂志文章abstract::Basal IGF-I levels and the GH response to at least two among provocative stimuli such as clonidine (CLO, Catapresan, 150 mcg/m2 p.o.), GHRH (1 mcg/kg i.v.)+arginine (ARG, 0.5 g/kg i.v. infusion during 30 min) and GHRH+pyridostigmine (PD, Mestinon cpr 60 mg p.o.) have been evaluated in 43 children with Prader-Willi syn...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章
doi:10.1007/BF03343684
更新日期:2000-02-01 00:00:00
abstract::Male to female sex reversal results from failure of testis development. Mutations in the SRY gene or in other genes involved in the sexual differentiation pathway are considered to cause XY gonadal dysgenesis. The majority of the mutations in the SRY described so far are located within the SRY coding region, mainly in...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347266
更新日期:2005-07-01 00:00:00
abstract::E-cadherin and catenins play a major role in neoplastic cell behavior as a suppressor of invasion and/or metastasis. The aim of this study was to determine E-cadherin, alpha-catenin and beta-catenin expressions in papillary thyroid carcinoma (PTC) and to correlate the results of expression to initial clinicopathologic...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03345079
更新日期:2002-07-01 00:00:00
abstract:CONTEXT:The latest guidelines of the 4th International Workshop on Asymptomatic Primary Hyperparathyroidism (aPHPT) reintroduced hypercalciuria (i.e. urinary calcium > 400 mg/day) as criterion for surgery. However, the value of hypercalciuria as a predictor of nephrolithiasis and the correct cut-off values still need t...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-019-01162-y
更新日期:2020-05-01 00:00:00
abstract:BACKGROUND:Energy homeostasis and body weight are regulated by a highly complex network involving the brain, the digestive tract, and white adipose tissue (WAT). Knowledge about signaling pathways connecting digestive tract and WAT is limited. Gut hormone ghrelin and adipokine adiponectin are both decreased in obesity ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,随机对照试验
doi:10.1007/BF03346709
更新日期:2011-06-01 00:00:00
abstract:UNLABELLED:Hypercalcemia occurring in patients with advanced breast cancer (BC) is generally due to osteolytic metastases or to the activity of circulating tumor-derived products. In these conditions, the production of endogenous PTH is reduced. The frequency of hypercalcemia due to primary hyperparathyroidism in breas...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03343867
更新日期:2001-05-01 00:00:00
abstract::To characterize natriuretic peptide receptor (NPr) gene expression in human tissues, we cloned portions of the cDNAs codifying for NPr with guanylyl cyclase activity (NPr-A and NPr-B) and without guanylyl cyclase activity (NPr-C). Total RNA was extracted from samples taken at surgery from normal human tissues. NPr-A a...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349021
更新日期:1996-10-01 00:00:00
abstract::The present study was performed in 30 patients who needed steroid therapy: courses of triamcinolone or DTM 8-15 given orally lasted 30 days. In 15 of these patients glucoactive corticosteroids were administered in combination with 5 micrograms/day of 25OH-vitamin D3 (25OHD3). 47Calcium oral test and 99mTc-MDP kinetics...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348448
更新日期:1984-10-01 00:00:00
abstract::The pineal gland contains many peptides known to be implicated in melatonin production. We examined the effects of a synthetic pineal tetrapeptide Ala-Glu-Asp-Gly on melatonin secretion by the pineal gland. The tetrapeptide effects on pineal gland melatonin secretion were studied in young (9 weeks) and old (27 months)...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03345159
更新日期:2003-03-01 00:00:00
abstract::In addition to growth hormone (GH), sex hormones are important determinants of body composition. Aging is accompanied by a decrease in free testosterone levels and, as BMI as well as fat mass increase with age (with a redistribution of body fat), whereas muscle mass decreases, it is tempting to attribute a causal role...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:
更新日期:1999-01-01 00:00:00
abstract::Somatomedin was measured by rat bioassay in samples obtained from renal artery and vein, in order to study the role of this organ in the production of somatomedin activity. The results showed a significant difference, with an increase of the activity in the venous samples. According to the data reported in the literat...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350423
更新日期:1979-07-01 00:00:00
abstract:OBJECTIVES:To investigate the effect of testosterone treatment on biomarkers calprotectin, fibroblast growth factor 23 (FGF23), soluble Klotho, phosphate, calcium, parathyroid hormone, creatinine and estimated glomerular filtration rate. DESIGN:Randomized, double-blinded, placebo-controlled study. SETTING:Odense Andr...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s40618-016-0597-3
更新日期:2017-05-01 00:00:00
abstract::Although it is well known that growth hormone may influence protein metabolism, few investigations have been undertaken on serum protein levels in acromegaly; recently hypoglobulinemia has been observed in this endocrine disorder. In 28 acromegalic patients and 56 control subjects sera have been analyzed for total pro...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349317
更新日期:1979-04-01 00:00:00
abstract::Bone matrix is composed mainly of inorganic materials, while the bone organic compartment is a minor and complex structural entity, surrounding and supporting cells. Three major classes of biomolecules are involved in this organic part: structural proteins, specialized proteins, and proteoglycans. This review will bri...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:
更新日期:2010-01-01 00:00:00
abstract::A rapid routine method of determining estrogens in non-pregnancy urine is described. It involves the following steps: 1) Dilution of each urine sample with an equal volume of saturated ammonium sulfate solution; 2) Addition of Sephadex G-15 beads; 3) Filtration of the mixture; 4) Liberation of the estrogens from the S...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350365
更新日期:1978-04-01 00:00:00
abstract::Ghrelin is a 28-amino-acid hormone produced mainly by the stomach which strongly promotes food intake. It is the only known peripheral orexigenic hormone that induces the release of GH. Ghrelin has been proposed as a link between the enteric system and central regulation of energy balance and growth. Although it has r...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350806
更新日期:2007-10-01 00:00:00
abstract::Cushing's Syndrome (CS) may sometimes lead to dilated cardiomyopathy, even though this condition can be partially or completely reversed after treatment. In this article we report the case of a 28-yr-old woman with CS secondary to adrenal adenoma who exhibited congestive heart failure as an initial symptom. Two weeks ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03346339
更新日期:2007-06-01 00:00:00
abstract::To evaluate the effect of weight loss and diet therapy on plasma sex hormone behavior in male obesity, 9 men with a BMI of 43.4 +/- 6.3 participated in an 8-week semistarvation program [whose energy content ranged from 320 to 500 k calorie/day (proteins 44 to 60 g and carbohydrates 54 to 81 g per day)] followed by a t...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350136
更新日期:1988-03-01 00:00:00
abstract:PURPOSE:To compare the histopathological features and the outcomes of the follicular variant and classical variant of papillary thyroid carcinoma. MATERIAL AND THE METHODS:Demographic data, histopathological features (tumor size, thyroid capsule invasion, extrathyroidal extension, vascular invasion and multicentricity...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-015-0376-6
更新日期:2015-12-01 00:00:00
abstract::Following presentation and diagnosis, microprolactinomas usually follow a benign course and rarely progress to macroprolactinomas. However, clinically significant enlargement of prolactinomas during pregnancy, presumably related to estrogen stimulation, has been reported. This report describes a patient with amenorrhe...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349744
更新日期:1995-06-01 00:00:00
abstract::Antithyroid drugs may be proposed as the firstline therapy for hyperthyroidism due to Graves' disease since some patients undergo prolonged remission after drug withdrawal. On the other hand, some studies, though controversial, indicated that methimazole (MMI) has some immunomodulating activity. We retrospectively ana...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03346433
更新日期:2008-10-01 00:00:00
abstract::We summarized the clinical course of 10 patients with silent thyroiditis and evaluated the clinical usefulness of ultrasonography, in combination with clinical and laboratory findings, for the differentiation from Graves' disease. Serum T3 and T4 were increased in all cases, and the ratio of T3/T4 (ng/micrograms) was ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348732
更新日期:1992-04-01 00:00:00
abstract::Circadian rhythms of hormone secretion are by now well recognized but there are limited data available to compare such rhythms of multiple hormones in individual subjects. Therefore concentrations of serum thyrotropin (TSH), cortisol, growth hormone (GH), triiodothyronine (T3) and prolactin (PRL) were determined in bl...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349346
更新日期:1979-10-01 00:00:00
abstract:PURPOSE:We recently demonstrated a protective effect of the farnesoid X receptor agonist obeticholic acid (OCA) in rat models of bleomycin-induced pulmonary fibrosis (PF). Aim of the present study was to investigate whether the positive effects of OCA treatment are apparent also on ongoing bleomycin-induced PF, i.e., a...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-018-0913-1
更新日期:2019-03-01 00:00:00
abstract::As it has been hypothesized that IGF-binding proteins (IGFBPs) may have a role as autocrine/paracrine factors in regulating the local actions of the insulin-like growth factors (IGFs) in the ovary, we studied the production of the IGFBPs by human granulosa cells (GC) in culture and the role of IGFBP-3 in the modulatio...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347856
更新日期:1996-01-01 00:00:00
abstract::The authors report the profiles of luteinizing hormone (LH), estradiol (E2), progesterone (P) and androstenedione (A) in some female pigs with altered plasma hormonal levels. Twenty cycles are described and 19 out of them are characterized by low plasma P in luteal phase of different etiology, at least as measured by ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350557
更新日期:1983-02-01 00:00:00
abstract:OBJECTIVE:Two yr after legislation of salt iodization of 40 parts per million (ppm) in 1994, goiter was still endemic and urinary iodine concentration (UIC) remained elevated in many provinces of Iran. Goiter prevalence and UIC were compared 2 and 7 yr after sustained consumption of uniformly iodized salt by Iranian ho...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03346386
更新日期:2008-05-01 00:00:00
abstract::Fifty-seven (35.6%) of 160 patients with papillary thyroid carcinoma had lymph node metastases at the primary treatment. Children and adolescents were most frequently affected (69.2%), followed by the age group of 21-40-year olds (38.8%). Those older than 40 had the lowest incidence of lymph node metastases (29.6%; p ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03346863
更新日期:1991-07-01 00:00:00
abstract::Exhaustive graded exercise leads to changes of hormones, carbohydrate, and lipid metabolism in normal controls and obese patients after prolonged starvation. Concomitant with a large increase of plasma catecholamines, insulin concentration is reduced and blood glucose levels slowly increase. More glucose is made avail...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348344
更新日期:1983-12-01 00:00:00
abstract::We report two patients with incidentally discovered enlarged parathyroid glands while performing neck ultrasonography (US) for thyroid nodules. The parathyroid masses were seen as hypoechoic, homogeneous, oval nodules, separated from the thyroid gland. Both patients were completely asymptomatic, although subclinical e...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03343646
更新日期:1999-11-01 00:00:00