Abstract:
OBJECTIVE:Prolactin is capable of both trophic and lytic actions in rat corpora lutea. In corpora lutea responding to a trophic prolactin signal, the long form of the prolactin receptor is the dominant form and is upregulated by prolactin. We investigated whether mRNA for the short form of the prolactin receptor was dominant in corpora lutea responding to a lytic prolactin signal, and whether the relative concentrations of the mRNAs for both forms of the prolactin receptor were changed during this response. DESIGN AND METHODS:Immature rats were ovulated by injection of 5 IU equine chorionic gonadotrophin and 5 IU human chorionic gonadotrophin, and were hypophysectomized shortly after ovulation. Nine days after hypophysectomy, rats were injected with prolactin (500 microg/day) or vehicle for 24 (n=6, n=6) or 72 h (n=13, n=5). Total RNA was isolated from corpora lutea and mRNA for both types of prolactin receptor were analyzed by semiquantitative RT-PCR using the ribosomal protein S16 as the internal control. RESULTS:The intensities of the long- and short-form prolactin receptor signals were normalized to the S16 internal control and expressed as relative densitometric units. The normalized values at 24h for prolactin-treated vs vehicle-treated rats were 0.23 +/- 0.05 vs 0.49 +/- 0.15 (P>0.05) for the short form and 4.04 +/- 0.8 vs 4.23 +/- 0. 6 (P>0.05) for the long form. The values for 72 h were 0.30 +/- 0.05 vs 0.24 +/- 0.05 (P>0.05) for the short form and 2.76 +/- 0.4 vs 5. 53 +/- 0.3 (P<0.01) for the long form respectively. CONCLUSION:The long form of the prolactin receptor is the dominant form at both time-points; however, the concentration of mRNA for this receptor isoform was specifically downregulated by prolactin treatment. Our results suggest that the short form of the prolactin receptor alone is unlikely to mediate the luteolytic action of prolactin, but that luteolytic events may be influenced via a change in the ratio of the two receptor isoforms.
journal_name
Eur J Endocrinoljournal_title
European journal of endocrinologyauthors
Bowen JM,Telleria CM,Towns R,Keyes PLdoi
10.1530/eje.0.1430285subject
Has Abstractpub_date
2000-08-01 00:00:00pages
285-92issue
2eissn
0804-4643issn
1479-683Xpii
1430285journal_volume
143pub_type
杂志文章abstract:OBJECTIVE:Thyroidal production of triiodothyronine (T(3)) is absent in patients who have undergone total thyroidectomy. Therefore, relative T(3) deficiency may occur during postoperative levothyroxine (L-T(4)) therapy. The objective of this study was to evaluate how the individual serum T(3) level changes between preop...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-11-1029
更新日期:2012-09-01 00:00:00
abstract:OBJECTIVE:To examine the genes for AMP-activated protein kinase (AMPK) subunits alpha2 (PRKAA2) and gamma3 (PRKAG3) as candidates for polycystic ovary syndrome (PCOS) and its component traits. DESIGN AND METHODS:A total of 287 white PCOS women were recruited from the reproductive endocrinology clinic at the University...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0245
更新日期:2009-09-01 00:00:00
abstract::Patients with adrenal insufficiency need lifelong glucocorticoid replacement, but many suffer from poor quality of life, and overall there is increased mortality. Moreover, it appears that use of glucocorticoids at the higher end of the replacement dose range is associated with increased risk for cardiovascular and me...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-08-0874
更新日期:2009-05-01 00:00:00
abstract:OBJECTIVE:Adult height deficit seen in Turner syndrome (TS) originates, in part, from growth retardation in utero and throughout the first 3 years of life. Earlier diagnosis enables earlier therapeutic intervention, such as with recombinant human GH (r-hGH), which may help to prevent growth retardation. In this open-la...
journal_title:European journal of endocrinology
pub_type: 杂志文章,多中心研究
doi:10.1530/EJE-10-1048
更新日期:2011-06-01 00:00:00
abstract::There are close interactions between the adipocyte-derived hormone, leptin, and the anterior pituitary, especially the hypothalamic-pituitary-adrenal (HPA) axis. We investigated the relationship between the sympathetic adrenergic system and serum leptin levels, dependent on the function of anterior pituitary hormone a...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1450295
更新日期:2001-09-01 00:00:00
abstract:OBJECTIVE:Very few previous studies have compared the degree of health-related quality of life (HRQL), depression and anxiety of differentiated thyroid cancer patients (DTC) under short-term hypothyroid-ism and levothyroxine treatment. METHODS:Using patient-completed instruments, we examined the frequency of physical ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.1.02047
更新日期:2005-12-01 00:00:00
abstract:OBJECTIVE:Although fibroblast growth factor 23 (FGF23) has been implicated in the pathogenesis of cardiovascular disease, the relationship between FGF23 and cardiovascular disease has not been well characterized in the general population. The aim of this study was to determine whether serum FGF23 is independently assoc...
journal_title:European journal of endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1530/EJE-11-0577
更新日期:2011-11-01 00:00:00
abstract:Background:If biochemical control of acromegaly is not achieved by operation and medication, radiotherapy may be indicated. Objective:To describe fractionated radiotherapy (FRT) and stereotactic radiosurgery (SRS) regarding excess of IGF-1 and pituitary function. Design and methods:A retrospective analysis of 352 pat...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-19-0784
更新日期:2020-03-01 00:00:00
abstract:Background:The treatment of acromegaly resistant to first-generation somatostatin receptor ligands (SRLs) is often difficult. Pegvisomant and Pasireotide LAR are mostly used in these subset of patients, as second line therapies. Choice of the type of second line therapies is difficult, since predictors of response are ...
journal_title:European journal of endocrinology
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doi:10.1530/EJE-20-0767
更新日期:2021-02-01 00:00:00
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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.0.1430577
更新日期:2000-11-01 00:00:00
abstract:OBJECTIVE:Serum IGF-binding protein 2 (IGFBP2) concentrations are reduced in obese humans and increase after a prolonged period of fasting. We investigated the association between IGFBP2 levels and mortality together with other factors that are related to IGFBP2, including the metabolic syndrome and physical function. ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-12-0160
更新日期:2012-07-01 00:00:00
abstract::Multiple endocrine neoplasia type 1 (MEN 1) is a familial syndrome characterized by parathyroid, enteropancreatic and pituitary tumors. The gene responsible for this syndrome is localized at chromosomal 11q13 region and DNA markers from this region cosegregate with the disease. The recent identification of the MEN1 ge...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1420131
更新日期:2000-02-01 00:00:00
abstract::The ob protein, termed leptin, is produced by adipocytes and is thought to act as an afferent satiety signal regulating weight through suppressing appetite and stimulating energy expenditure in humans and/or rodents. Insulin has been found to be a potent stimulator of leptin expression in rodents. It is unclear at pre...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1380501
更新日期:1998-05-01 00:00:00
abstract:OBJECTIVE:The current guidelines for the management of adrenal incidentaloma advise hormonal and radiological follow-up of patients for 2-5 years after the initial diagnosis. However, the vast majority of adrenal incidentaloma are non-functional benign cortical adenomas that require no treatment, so the routine applica...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-15-0199
更新日期:2015-08-01 00:00:00
abstract:OBJECTIVE:Postmenopausal estradiol (E(2)) levels vary widely between individuals and this variation is an important determinant of diseases such as osteoporosis. It has been suggested that the estrogen receptor alpha (ESR1) gene may influence peripheral E(2) levels, but the role of common sequence variations in the ESR...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.1.01973
更新日期:2005-08-01 00:00:00
abstract::The p16INK4A and p15INK4B genes on chromosome 9p21 encode the p16 and p15 inhibitors of cyclin D/cyclin-dependent kinase 4 complexes respectively. Mutations and deletions of the p16INK4A gene have been found in melanomas and many other types of tumors. To assess the role of the p16INK4A and p15NK4B genes in tumorigene...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1360074
更新日期:1997-01-01 00:00:00
abstract:OBJECTIVE:The intrarenal renin-angiotensin system (RAS) activation plays a pivotal role in immunoglobulin A nephropathy (IgAN) pathogenesis, which is still largely undefined. Recently, vasopressin (AVP) has been advocated to contribute to the genesis and progression of chronic kidney diseases (CKD) directly, and indire...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-11-0512
更新日期:2011-10-01 00:00:00
abstract:Objectives:We investigated the clinical significance of ACTH stimulation during adrenal venous sampling (AVS) by surgical outcome of primary aldosteronism (PA). Design:Multicenter retrospective study by Japan PA study. Method:We allocated 314 patients with both basal and ACTH-stimulated AVS data who underwent adrenal...
journal_title:European journal of endocrinology
pub_type: 杂志文章,多中心研究
doi:10.1530/EJE-19-0860
更新日期:2020-03-01 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::Regulatory actions of angiotensin II (AngII), which is involved in the pathophysiology of hypertension and also participates in cell proliferation and cell differentiation, are mainly mediated by AngII type 1 (AT1) receptor. Recently, activating mutations of receptors causing hyperfunctioning endocrine diseases have b...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1370262
更新日期:1997-09-01 00:00:00
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journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1500799
更新日期:2004-06-01 00:00:00
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
更新日期:2012-07-01 00:00:00
abstract::The strategy for diagnosis of primary aldosteronism (PA) in the hypertensive population includes firstly a screening step, based on the measurement of plasma aldosterone-to-renin ratio (ARR), a test which must have high sensitivity, and secondly a confirmatory step based on the demonstration of excessive aldosterone p...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-18-0704
更新日期:2019-02-01 00:00:00
abstract:BACKGROUND:Ghrelin is a peptide mainly secreted by gastric mucosa and has been implicated in the regulation of eating behavior and weight balance. Obesity and Helicobacter pylori infection are associated with changes in plasma ghrelin levels. OBJECTIVE:This study was designed to evaluate the density of ghrelin-produci...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-11-0201
更新日期:2011-07-01 00:00:00
abstract:OBJECTIVE:Makorin ring finger protein 3 (MKRN3) gene restrains the hypothalamic-pituitary-gonadal axis. In girls, peripheral levels of MKRN3 decline prior to the onset of puberty. We described longitudinal changes in serum MKRN3 levels in boys before and during puberty and assessed the effect of inhibition of estrogen ...
journal_title:European journal of endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1530/EJE-15-1193
更新日期:2016-06-01 00:00:00
abstract:OBJECTIVE:An inherited profile of genes related to the response to aggressive environmental factors such as viruses and chemicals may be related to an increased susceptibility to Graves' disease (GD). DESIGN AND METHODS:This prospective case-control study was designed to examine the relationship between human herpesvi...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0719
更新日期:2010-02-01 00:00:00
abstract:BACKGROUND/AIM:Our previous studies showed that administration of dexamethasone plus food increased serum leptin levels 100% more than dexamethasone alone. We hypothesized that this increase in leptin from the meal could result directly from the provision of fuel metabolites rather than from the meal-induced rise in in...
journal_title:European journal of endocrinology
pub_type: 临床试验,杂志文章
doi:10.1530/eje.0.1480669
更新日期:2003-06-01 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:OBJECTIVE:Thyroid hormone resistance (RTH) is characterised by variable tissue hyporesponsiveness to thyroid hormone. The disorder is usually caused by mutations in the thyroid hormone receptor beta (TR beta). We describe a large family with this disorder. SUBJECTS AND MEASUREMENT: We identified 36 family members with ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1500425
更新日期:2004-04-01 00:00:00
abstract:OBJECTIVE:In malnutrition both the GH-IGF and reproductive axes are greatly affected. Because the actions of IGF and sex steroids are inter-dependent in many tissues, we have examined how ovariectomy modulates the response of the systemic IGF system to undernutrition. DESIGN AND METHODS:Peripubertal (30 days of age) f...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1470417
更新日期:2002-09-01 00:00:00