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 to the decrease in androgen levels. In our study involving 372 males aged >20-85, age was found to be positively correlated with BMI and fat mass as measured by impedance, and negatively correlated with levels of free testosterone and free insulin-like growth factor-I. Multiple regression analysis revealed that BMI and age were independent determinants of testosterone levels. The latter decreased from 598+/-188 (SD) ng/dl in the young controls to 453+/-161 ng/dl in the elderly group, free testosterone decreasing from 15.35+/-4.10 to 8.38+/-2.51 ng/dl. Fat-free mass decreased by 18.9%. In a subgroup of 57 men aged 70-80 years, testosterone levels correlated negatively with percentage body fat (r=-0.57), abdominal fat (r=-0.56) and plasma insulin levels (r=-0.40). As GH levels and pulsatility also decrease with age and as, moreover, androgens amplify endogenous secretion of GH, it is not easy to determine the relative role of androgen deficiency in the age-associated changes in body composition. Moreover, increase in fat mass (obesity), as occurs in aging males, is in itself associated with low levels of free testosterone and GH which both normalize after weight reduction. The role of testosterone in the age-associated changes in body composition is, however, further suggested by the increase in lean body mass and in mid-arm circumference and the decrease in waist-to-hip ratio observed after testosterone treatment of elderly men with decreased testosterone levels. Also in healthy eugonadal men, testosterone treatment, at least in supraphysiological doses, causes an important increase in fat-free mass (+/-10%) and in muscle size. The changes in muscle volume are associated with an increase in muscle fibre diameter, suggesting that testosterone induces muscle cell hypertrophy. In conclusion, aging in males is accompanied by an important increase in fat mass and a decrease in lean body mass. Several indices of body composition are significantly correlated with plasma testosterone levels before and after correction for BMI and age. It is evident, however, that in addition to testosterone levels, the age-associated somatopause is also a determinant of the changes in body composition.
journal_name
J Endocrinol Investjournal_title
Journal of endocrinological investigationauthors
Vermeulen A,Goemaere S,Kaufman JMkeywords:
subject
Has Abstractpub_date
1999-01-01 00:00:00pages
110-6issue
5 Suppleissn
0391-4097issn
1720-8386journal_volume
22pub_type
杂志文章,评审abstract::Finding that estrogen plays an important role in bone homeostasis in men prompted research on relationship of polymorphism at the CYP19 gene and the bone mass. Therefore, influence of 3-bp deletion/insertion polymorphism of CYP19 (TTTA)7 allele on the peak bone mass attainment in males was studied. Fifty-eight unrelat...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03346329
更新日期:2007-06-01 00:00:00
abstract:BACKGROUND:In the last decades, a higher incidence of congenital hypothyroidism (CH) has been recorded in Italy (1:1940) and worldwide, mainly due to the shift to lower screening TSH cutoffs. Although CH can also be caused by dysgenetic defects, most CH cases have recently been found to be more frequently associated wi...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:10.1007/s40618-015-0288-5
更新日期:2015-08-01 00:00:00
abstract::A 41-year-old male with primary hypothyroidism and a huge TSH-secreting pituitary tumor presented with a bleeding nasal mass that was initially misdiagnosed as a paraganglioma. Other unique features of the case include lack of complaints related to hypothyroidism, an extremely elevated TSH level of 3474 mU/l, and a lo...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03343584
更新日期:1999-06-01 00:00:00
abstract:BACKGROUND:The adiponectin gene has been identified as a susceptibility locus for metabolic syndrome, diabetes and cardiovascular disease. AIM:To examine the influence of two single nucleotide polymorphisms (SNPs) of this gene (+276G>T and +45T>G) on circulating adiponectin concentrations, and to evaluate their relati...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,随机对照试验
doi:10.3275/8972
更新日期:2013-11-01 00:00:00
abstract::The type of dietary fat affects the action of insulin by changes induced in the fatty acid composition of cell membranes. Little is known, however, about the effects of dietary fatty acids on insulin secretion or the possible relation between the fatty acid composition of the membrane phospholipids and insulin secreti...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03344034
更新日期:2002-05-01 00:00:00
abstract::Autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) is a rare, but well-defined monogenic disorder that is caused by mutations in the autoimmune regulator (AIRE) gene on chromosome 21q22.3. Patients most often suffer from loss of endocrine function in the parathyroid and adrenal glands but may also...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:10.1007/BF03345516
更新日期:2002-10-01 00:00:00
abstract:OBJECTIVE:Graves' orbitopathy (GO) is an inflammatory orbital disease of autoimmune origin with the potential to cause severe functional and psychosocial effects. The pathogenesis has not been fully elucidated. We investigated whether DNA methylation was associated with GO incidence in Chinese patients. MATERIALS AND ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-017-0796-6
更新日期:2018-06-01 00:00:00
abstract::The aim of the study was to examine the effects of strenuous training on the hypothalamic- pituitary-adrenal axis activity. Exercise tests and saliva collections for analysis of awakening cortisol response (ACR) and midnight cortisol were performed before and after a 7-day period of intensified training in a group of ...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章
doi:10.1007/BF03345561
更新日期:2008-01-01 00:00:00
abstract::Volume receptors are situated in many organs and are capable of modulating ADH secretion. We have evaluated the variation of plasma ADH concentration after an experimentally induced increase of cerebrospinal fluid (CSF) pressure (PCSF). The experiment was performed in controlled environmental conditions to avoid pain ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349891
更新日期:1996-07-01 00:00:00
abstract::The long-acting somatostatin analogue SMS 201-995 has been used efficaciously in the therapy of metastatic carcinoid tumor, vasoactive intestinal peptide producing islet cell carcinoma, acromegaly, and TSH secreting pituitary tumors. We report the development of a gallstone in a patient treated for 23 months with a lo...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348589
更新日期:1990-01-01 00:00:00
abstract::Eight-year follow-up evaluation and analysis of factors related to postoperative thyroid dysfunction were made in 216 patients with Graves' disease treated by subtotal thyroidectomy. The postoperative status of thyroid function were as follows according to hypersensitive TSH level: 65 patients (30.1%) were euthyroid, ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03344945
更新日期:1993-03-01 00:00:00
abstract:OBJECTIVE:Elimination of thyroid antigens by total thyroid ablation (TTA), namely, thyroidectomy followed by radioiodine, may be beneficial for Graves' Orbitopathy (GO). TTA is usually performed with a 131I dose of 30 mCi. In Italy, this dose must be followed by a 24-h protected hospitalization, with increase in the wa...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-017-0754-3
更新日期:2018-03-01 00:00:00
abstract:PURPOSE:Cold exposure activates the hypothalamus-pituitary-thyroid (HPT) axis, response blunted by previous acute stress or corticosterone administration. Chronic stressors can decrease serum T3 concentration, and thyrotropin-releasing hormone (Trh) expression in the paraventricular nucleus (PVN), but impact on the res...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-020-01328-z
更新日期:2020-07-30 00:00:00
abstract::The case of a 34-yr-old Caucasian male with Graves' disease presenting with a flaccid quadriplegia and severe hypokalemia is reported. The weakness was prevalent at the lower extremities and began during nocturnal sleep, after a strenuous physical exertion performed during the day. Correction of hypokalemia promptly r...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347807
更新日期:1995-03-01 00:00:00
abstract::We evaluated the 24-h profile of serum melatonin (MT) in 16 patients with Cushing's syndrome (11 pituitary- and 5 adrenal-dependent) aged 38.1 +/- 13.8 years and in 19 patients with acromegaly due to GH-secreting pituitary adenoma aged 52 +/- 11.9 years. Thirty-three healthy subjects aged 30 +/- 7 years and 26 healthy...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349691
更新日期:1995-01-01 00:00:00
abstract::Dopamine in humans inhibits the secretion of luteinizing hormone (LH), follicular stimulating hormone (FSH), thyroid stimulating hormone (TSH) and prolactin (PRL), and is a stimulator of growth hormone (GH) secretion. Dopamine-D1 receptor stimulation with fenoldopam increases basal PRL levels, suppresses TSH, and incr...
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/BF03350331
更新日期:1998-05-01 00:00:00
abstract::Few data are available on serum free thyroid hormone concentration in patients with T3-toxicosis. In this study total and free T4 and T3 and TBG were evaluated in 35 subjects with T3-toxicosis, including 12 with untreated Graves' disease, 5 Graves' patients on methimazole treatment, 13 with autonomous adenoma, 3 with ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350562
更新日期:1983-02-01 00:00:00
abstract::Abnormal nutritional status is an increasingly common complication in developed countries and, as reproductive age women are a part of this trend, the effect of maternal obesity on the pregnancy and neonate must be investigated. Pregestational obesity or overweight condition or an excessive gestational weight gain can...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:10.1007/s40618-014-0058-9
更新日期:2014-04-01 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::Eleven patients with Paget's disease of bone, treated intermittently for 2-4 years with porcine calcitonin (pCT) and clinically resistant to pCT [no modifications of serum alkaline phosphatase (ALP) and urinary hydroxyproline ( uHOP ) during pCT administration] were treated with 0.5-0.25 mg/day of human calcitonin (hC...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348394
更新日期:1984-04-01 00:00:00
abstract:OBJECTIVE:Increased inhibin A serum and plasma levels in the second trimester are significantly associated with the development of preeclampsia. The measurement of inhibin A during early pregnancies may be helpful to predict those at risk of this disorder. The purpose of this study was to determine whether the 769G>A v...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03346418
更新日期:2008-08-01 00:00:00
abstract:PURPOSE:The aim of this study was to evaluate the prevalence and risk factors associated with female sexual dysfunction (FSD) in young women with type 1 diabetes treated with different intensive insulin regimens. METHODS:Type 1 diabetic women aged 18-35 years were included in this study if they had stable couple relat...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章
doi:10.1007/s40618-016-0542-5
更新日期:2017-02-01 00:00:00
abstract::We investigated ACTH and cortisol responses after ovine CRF injection (1 microgram/kg one bolus) in a group of 11 drug-free patients suffering from major depression. When compared to sex- and age-matched normal controls, our depressed patients showed: Higher ACTH basal values (p less than 0.002); higher cortisol basal...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350921
更新日期:1988-11-01 00:00:00
abstract::A comparison of peripheral patterns of androstenedione (A), 17 beta-estradiol (E2) and progesterone (P) is reported in ten infertile women during HMG-HCG induction of ovulation, in order to assess the site of ovarian secretion of plasma A and the possible influence on conception. Evidence for both the follicular and l...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03351016
更新日期:1984-08-01 00:00:00
abstract::According to recent studies showing the presence of estrogens receptors (ERs) in the human female lower urinary tract, we performed ER and progesterone receptor (PR) assays in fresh frozen and paraffin embedded biopsies taken from the urinary bladder. Fourteen females undergoing endoscopy during staging for gynecologi...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347639
更新日期:1992-11-01 00:00:00
abstract::We examined the distribution of nuclear T3 in mature rat brain with the aim of determining specific targets of thyroid hormones within this tissue. Saturation experiments, performed in 9 different structures of the brain and in 4 parts of the cortex, revealed the presence of a single class of binding sites with a mean...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348511
更新日期:1985-08-01 00:00:00
abstract:BACKGROUND:In vitro data have shown conflicting results in terms of the effect of leptin on granulosa cells steroidogenesis. AIM:The aim of the present study was to investigate the effect of low and high doses of leptin on basal and FSH-induced steroids secretion by human luteinized granulosa cells in culture. MATERI...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03346478
更新日期:2009-05-01 00:00:00
abstract::Two radioimmunological techniques for the measurement of anti-alpha-galactosyl (anti-Gal) antibodies were developed and we demonstrated that this antibody is present in the serum of most untreated patients with Graves' disease, thyroid-associated ophthalmopathy (TAO) and autoimmune thyroiditis. Thyrotropin-binding inh...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349806
更新日期:1995-11-01 00:00:00
abstract:OBJECTIVE:We designed a single-center retrospective study to assess the QT interval duration and to describe cardio vascular events among patients treated with mitotane for a adrenocortical carcinoma (ACC). DESIGN:We selected 14 patients (6 males and 8 females) that met the following criteria: ACC treated with mitotan...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章
doi:10.3275/8616
更新日期:2012-11-01 00:00:00
abstract:PURPOSE:This study was aimed at assessing the incidence and timing of thyroid nodules recurrence, defined as appearance of new benign or malignant nodules in contralateral lobe in patients with benign thyroid nodules or thyroid microcarcinoma treated with lobo-isthmectomy. Patient's characteristics and risk factors ass...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-018-0946-5
更新日期:2018-12-01 00:00:00