Abstract:
INTRODUCTION:Secretory products from adipocytes may contribute to deterioration in glycaemic control and increased insulin resistance (IR). Retinol-binding protein 4 (RBP-4) may increase IR in mice, with elevated levels in insulin-resistant mice and humans with obesity and type 2 diabetes. However, the mechanisms regulating RBP-4 synthesis remain not fully understood. It is not clear whether short-term glucose-induced hyperglycaemia and hyperinsulinaemia as well as glucocorticosteroid-induced increase in IR might be reflected in alterations in serum RBP-4 levels in humans. In order to investigate this, we measured serum RBP-4, glucose and insulin concentrations during 75.0 gram oral glucose tolerance test (OGTT) - Study 1, as well as before and after oral administration of dexamethasone - Study 2. MATERIAL AND METHODS:Both studies included 35 subjects (8 males), age (mean +/- SD) 39.1 +/- 15.6 years, BMI 35.8 +/- 8.7 kg/m(2). Twenty-four of those subjects (5 males), age 38.7 +/- 15.1 years, BMI 34.4 +/- 8.3 kg/m(2), had 75 gram oral glucose tolerance test (OGTT) - Study 1. Blood samples were taken before (0 minutes), and at 60 and 120 minutes of OGTT. 17 subjects (3 males, 4 subjects with type 2 diabetes), age 43.1 +/- 18.1 years, BMI 36.7 +/- 9.0 kg/m(2) underwent screening for Cushing's disease/syndrome (Study 2). Dexamethasone was administered in a dose of 0.5 mg every 6 hours for 48 hours. Fasting serum concentrations of RBP-4, glucose and insulin were assessed before (D0) and after 48 hours of dexamethasone administration (D2). IR was assessed by HOMA in all non-diabetic subjects and in subjects participating in study 1 also by Insulin Resistance Index (IRI), which takes into account glucose and insulin levels during OGTT. RESULTS:Glucose administration resulted in significant increases in insulin and glucose (p < 0.0001). There was, however, no change in RBP-4 concentrations (124.1 +/- 32 mg/ml at 0 minutes, 123 +/- 35 mg/ml at 60 minutes and 126.5 +/- 37.5 mg/ml at 120 minutes of OGTT, p = ns). All subjects in Study 2 achieved suppression of cortisol below 50 nmo/l. Dexamethasone administration resulted in an increase in fasting insulin (from 11.6 +/- 6.8 to 17.1 +/- 7.2 muU/ml; p = 0.003), and an increase in HOMA (from 2.73 +/- 1.74 to 4.02 +/- 2.27; p = 0.015), although without a significant change in RBP-4 levels (119 +/- 26.8 vs. 117.5 +/- 24.8 mg/ml, p = ns). RBP-4 correlated with fasting insulin (r = 0.40, p = 0.025), fasting glucose (r = 0.41, p = 0.02) and HOMA (r = 0.43, p = 0.015), but not with IRI (r = 0.19, p = 0.31). There was, however, only a moderate correlation between HOMA and IRI (r = 0.49 [r(2) = 0.24]; p = 0.006, Spearman rank correlation), while the best correlation was obtained between the product of glucose and insulin levels at 60 min of OGTT and IRI in a non-linear model (r = 0.94 [r(2) = 0.88]; p<0.00001). In subjects who received dexamethasone, a positive correlation between RBP-4 and HOMA (p = 0.01) was lost after two days of dexamethasone administration (p = 0.61). CONCLUSIONS:RBP-4 levels do not change during oral glucose tolerance test or after a dexamethasone-induced increase in insulin resistance. This implies that it is highly unlikely that RBP-4 is involved in short-term regulation of glucose homeostasis in humans and that it responds to short-term changes in insulin resistance. A moderate correlation between RBP-4 and some insulin resistance indices (HOMA) does not exclude the fact that RBP-4 might be one of many factors that can influence insulin sensitivity in humans.
journal_name
Endokrynol Poljournal_title
Endokrynologia Polskaauthors
Lewandowski KC,Basinska-Lewandowska M,Bieńkiewicz M,Randeva HS,Lewiński Asubject
Has Abstractpub_date
2008-07-01 00:00:00pages
305-11issue
4eissn
0423-104Xissn
2299-8306journal_volume
59pub_type
杂志文章abstract::Diabetic kidney disease (DKD) remains the leading cause of the end-stage renal disease (ESRD) and the most common reason for renal replacement therapy. Research has been carried out for years to find a marker that would enable early identification of people at risk of DKD occurrence, as well as people who will progres...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.a2020.0077
更新日期:2020-01-01 00:00:00
abstract::Arteriovenous carotid-cavernous fistula is an abnormal connection between the dural branches of carotid artery or vertebral artery and the dural sinuses. Its clinical manifestations can resemble the crucial signs of thyroid orbitopathy, an inflammatory disorder of the orbit associated with Graves' disease. Therefore, ...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2007-11-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to evaluate the influence of body mass changes on plasma concentrations of proinflammatory cytokines in obese women after the initially obtained weight reduction in a five-year follow-up period. MATERIAL AND METHODS:Thirty out of 42 women with simple obesity (age 41.8 ± 11.9 year...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2012-01-01 00:00:00
abstract::Acromegaly is usually caused by excess GH (growth hormone) secretion by pituitary adenoma. Extremely rare (< 1% of cases) acromegaly can be a result of ectopic GHRH (growth hormone releasing hormone) secretion by bronchial tubes, lung, pancreatic or intestinal tumor. The aim of this description is to present the case ...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2006-01-01 00:00:00
abstract:INTRODUCTION:The introduction of the DICOM format in all diagnostic imaging devices allowed co-registering SPECT, CT, MR and other types of biomedical imaging. Fusion can be performed by dedicated hybrid devices or by means of software. The fusion algorithm consists of two steps: coregistration and simultaneous visuali...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2006-01-01 00:00:00
abstract:INTRODUCTION:Calcitonin gene-related peptide is an important vasodilator. It plays an important role in the metabolism of chewing muscles. The aim of the study was to evaluate the plasma level of CGRP in patients with myofascial pain (RDC/TMD Ia) and myofascial pain with limited opening (RDC/TMD Ib) before and after oc...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,随机对照试验
doi:10.5603/EP.2017.0025
更新日期:2017-01-01 00:00:00
abstract:INTRODUCTION:Surgery remains the most effective treatment for primary hyperparathyroidism (PHPT). Minimally invasive radioguided parathyroidectomy (MIRP) is a common technique for detecting and excising abnormal parathyroid glands. The aim of this study was to compare injections of low-dose and high-dose (99m) Tc metho...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.a2017.0031
更新日期:2017-01-01 00:00:00
abstract::Anti-adrenal and anti-pituitary autoantibodies have been determined in 45 patients with autoimmune diseases of the thyroid, including 25 patients with Graves' disease and 20 patients with hypothyroidism of autoimmune origin. The determinations were carried out with the use of solid-phase RIA methods previously develop...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:1993-01-01 00:00:00
abstract::The aim of this review is to present the up-to-date information concerning the prevalence, pathogenesis, diagnosis and treatment of gynecomastia. Gynecomastia is a benign, unilateral or bilateral enlargement of the male breast due to the imbalance between the androgens and estrogens at the breast tissue level. This cl...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,评审
doi:
更新日期:2005-05-01 00:00:00
abstract::Polycystic ovary syndrome (PCOS) diagnosis and therapy still arouse a lot of controversy. Each year brings new information, so, having collected the experience of three scientific societies, we present contemporary recommendations concerning PCOS diagnostics and treat-ment. In adult female diagnosis, we still use the ...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,实务指引
doi:10.5603/EP.2018.0046
更新日期:2018-01-01 00:00:00
abstract:INTRODUCTION:An increased risk of mortality in patients with uncontrolled acromegaly has been reported in several studies. We aimed to assess the impact of co-morbidities on the survival of patients with acromegaly after long-term treatment and follow-up. MATERIAL AND METHODS:A retrospective analysis was performed for...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.a2016.0031
更新日期:2016-01-01 00:00:00
abstract:INTRODUCTION:Considering the high prevalence of congenital hypothyroidism (CH) in Isfahan, it seems that it is necessary to investigate the aetiology of the disorder and its related factors. The aim of this study was to determine the aetiology of CH among children in Isfahan province. MATERIAL AND METHODS:In this cros...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2010-11-01 00:00:00
abstract:INTRODUCTION:Surgeries that spare the adrenal cortex during adrenalectomy have profound justification. Indications for this type of surgery are fairly strict, and more than 30 years of observations continuously verify the results of the procedure. MATERIAL AND METHODS:Of a total of 650 adrenalectomies, 22 (3.4%) were ...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.a2020.0033
更新日期:2020-01-01 00:00:00
abstract::Obesity and thyroid function are closely related. Thyroid hormones are involved in the regulation of metabolism, thermogenesis, food intake, and fat oxidation. In obese children the most frequent hormonal abnormalities are slight hyperthyrotropinaemia and moderate increases in total T3 and/or fT3 concentrations. Those...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,评审
doi:10.5603/EP.2017.0007
更新日期:2017-01-01 00:00:00
abstract::Acromegaly is a rare, chronic condition caused by growth hormone (GH) overproduction, usually due to a benign tumour of the pituitary gland. During the disease many complications occur, including cardiovascular disease and changes in the musculoskeletal, respiratory, and endocrine systems. Treatment includes surgery, ...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,评审
doi:10.5603/EP.a2018.0080
更新日期:2019-01-01 00:00:00
abstract::Renalase is a recently identified flavoprotein oxidase, secreted mainly by the kidneys, which takes part in the degradation of catecholamines. The catecholamine inactivating effect results in the modulation of the sympathetic system tension and, consequently, in a decrease of blood pressure, myocardial contractility, ...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.a2020.0044
更新日期:2020-01-01 00:00:00
abstract::A case of 55 years old woman with "hot" right lobe toxic thyroid nodule, presenting with paroxysmal atrial fibrillation, and therefore treated with 131I 666MBq (18 mCi) is described. After six years she became pyrexic and suffered of severe cough proxyisms. The fine needle biopsy of the above nodule showed the presenc...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:1992-01-01 00:00:00
abstract:INTRODUCTION:Childhood obesity has been associated with the development of insulin resistance, potentially leading to several metabolic disorders. Osteocalcin has been reported to contribute to the regulation of glucose tolerance and insulin sensitivity. The purpose of this study was to examine the relationship between...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.2013.0016
更新日期:2013-01-01 00:00:00
abstract:INTRODUCTION:Sleep-related breathing disorders (SRBD) are commonly present in patients with Prader-Willi syndrome (PWS). Recombinant human growth hormone (rhGH) treatment is reported to improve breathing function in PWS, but the findings are not explicit. MATERIAL AND METHODS:Screening polysomnography- polygraphy (PSG...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.a2017.0057
更新日期:2017-01-01 00:00:00
abstract::The World Health Organization (WHO) issued a recommendation (Technical Consultation: Paris 2006, Luxembourg 2007) that salt consumption, as a risk factor for hypertension, atherosclerosis, myocardial infarction, stroke, and select cancers, should be restricted. The European Commission looked to adhere to this recommen...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,评审
doi:
更新日期:2010-01-01 00:00:00
abstract:INTRODUCTION:Recently, a new fracture risk-assessment calculator (FRAX) has been introduced. The aim of this study was to assess its usefulness for the re-assessment of fracture risk in obese patients and re-assignment to treatment. MATERIAL AND METHODS:350 obese female patients were included. In all of them, 10-year ...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2009-03-01 00:00:00
abstract:INTRODUCTION:Despite the known importance of somatostatin analogues (SSAs) in the treatment of acromegaly, patient satisfaction leading to preferences for specific SSAs have received little attention so far. MATERIAL AND METHODS:This open, prospective, observational, multicentre patient-reported outcome study included...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,多中心研究
doi:10.5603/EP.2016.0066
更新日期:2016-01-01 00:00:00
abstract:INTRODUCTION:Ghrelin is a polypeptide hormone secreted mainly by the stomach cells, stimulating food intake and growth hormone release. Decreased plasma ghrelin concentration was found in obese subjects. Clinical and experimental data suggest that ghrelin also exerts a blood pressure lowering property. The influence of...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2010-01-01 00:00:00
abstract:INTRODUCTION:In this study, we aimed to investigate the relationship between glycated haemoglobin (HbA1c) levels and the severity of coronary artery disease (CAD) in < 40 years old patients. MATERIAL AND METHODS:The study population consisted of 211 premature coronary atherosclerotic patients (pCAP) (aged 36.4 ± 2.5 y...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2012-01-01 00:00:00
abstract::Thyroid cancer in children is rare and accounts for 1-3% of all malignant tumours. Differentiated thyroid cancers (DTC) and particularly papillary thyroid carcinoma (PTC) (90% of cases) are the most prevalent. Surgery is the mainstay of treatment in patients with DTC. The current recommendations are based not on prosp...
journal_title:Endokrynologia Polska
pub_type: 杂志文章,评审
doi:10.5603/EP.a2019.0033
更新日期:2019-01-01 00:00:00
abstract::NIS gene is located on chromosome 19 and encodes 643 amino acid protein. It belongs to membrane Na+ dependent glucose symporter proteins family. In normal thyroid is located in basolateral membrane of thyreocyte. It plays a main role in concentrating of iodine in thyreocyte and thus in thyroid hormones synthesis. It w...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract:INTRODUCTION:Growth hormone (GH) deficiency, either isolated or combined with other pituitary hormone deficiencies, is associated with increased mortality and abnormal body composition, particularly visceral adiposity. We aimed to investigate the effects of GH deficiency with or without sex steroid deficiencies on ultr...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:10.5603/EP.2014.0027
更新日期:2014-01-01 00:00:00
abstract::Many mechanism may participate in the inhibition of thyroid function by excess of iodine. The present study was aimed at answering the question, whether the excess of iodine influences the activity of type I thyroxine 5'-deiodinase. To 40 female rats fed with standard diet a dose of 42 micrograms of iodine daily was a...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:1993-01-01 00:00:00
abstract::The study was aimed at evaluation of usefulness of determination of blood serum 21-deoxycortisol concentration for the detection of heterozygous carriers of incomplete block of 21-hydroxylase synthesis leading to adrenal hyperplasia. An earlier observation of the authors that the determination of 21-deoxycortisol is a...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:1993-01-01 00:00:00
abstract::A group of 153 patients with scintigraphically detected autonomic "hot" nodules of the thyroid has been subjected to clinical and histopathological analysis. Substantial part of these patients (30.1%) had hyperthyroidism, partly (in 19.9% of cases) in the form of the thyrocardiac syndrome. A most frequent histopatholo...
journal_title:Endokrynologia Polska
pub_type: 杂志文章
doi:
更新日期:1988-01-01 00:00:00