Abstract:
OBJECTIVE:Cases of men with estrogen resistance and aromatase deficiency have highlighted the effects of estrogens on bone metabolism, the cardiovascular system and biochemical variables of the metabolic syndrome. In eugonadal men, administration of an aromatase inhibitor induces a substantial elevation of LH and testosterone due to the decreased negative-feedback signal of estrogen and may thwart the interpretation of results. As there is no gonad for LH to act on, no increase of serum testosterone concentration will be seen in female-to-male transssexuals. The aim of this study was to investigate the effects of estrogen deprivation on bone metabolism and vascular parameters without the interference of counter-regulatory effects as seen in eugonadal men. DESIGN:Thirty ovariectomized female-to-male transsexuals participated in this double-blind, randomized trial. During 3 months, subjects received the aromatase inhibitor anastrozole 1 mg/day (n = 16) or a placebo (n = 14) in addition to parenteral testosterone esters (Sustanon 250 every 2 weeks). RESULTS:Serum 17beta-estradiol (E(2)) concentration fell significantly from 134.0 +/- 78.8 to 77.7 +/- 130.6 pmol/l compared with placebo (P < 0.01). LH and FSH levels rose without the rise of testosterone levels observed in eugonadal men. Within the placebo group, E(2) remained at baseline levels. Of the endpoint variables measured (bone metabolism and vascular parameters) no significant changes were observed compared with placebo, or within the anastrozole-treated group. CONCLUSIONS:These results may indicate that the negative effects of estrogen deprivation in men only become manifest when the concentration falls below the levels induced by our intervention with anastrozole (77 pmol/l). This assumption is supported by the observation in the anastrozole group that, although effects of the reduction of serum E(2) on vascular parameters could not be demonstrated in subjects as a group, there was a correlation between individual serum E(2) and several vascular parameters.
journal_name
Eur J Endocrinoljournal_title
European journal of endocrinologyauthors
Bunck MC,Toorians AW,Lips P,Gooren LJdoi
10.1530/eje.1.02126subject
Has Abstractpub_date
2006-04-01 00:00:00pages
569-75issue
4eissn
0804-4643issn
1479-683Xpii
154/4/569journal_volume
154pub_type
杂志文章,随机对照试验abstract:OBJECTIVE:Adrenaline inhibits insulin secretion through activation of alpha(2)-adrenoceptors (ARs). These receptors are linked to pertussis toxin-sensitive G proteins. Agonist binding leads to inhibition of adenylyl cyclase, inhibition of Ca(2+) channels and activation of K(+) channels. Recently, three distinct subtype...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1490343
更新日期:2003-10-01 00:00:00
abstract::The GH/IGF1 axis may play an important role in cognitive function. This theory is supported by the finding that both GH and IGF1 receptors are located in several brain areas such as the hippocampus, a brain area that is known to play an essential role in cognitive processes, especially memory and learning. However, th...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-08-0279
更新日期:2008-12-01 00:00:00
abstract::To assess the metabolic effects of thyroid disease, body composition was determined by bioimpedance analysis (BIA) in 72 patients with untreated hyperthyroidism (mean age 48.7 +/- 1.9 years) and 26 patients with untreated hypothyroidism (63.8 +/- 3.4 years). Bioelectrical whole body resistance (R) and reactance (Xc) w...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1360493
更新日期:1997-05-01 00:00:00
abstract::The reduced activity of the growth hormone (GH)-insulin-like growth factor I (IGF-I) axis in aging may contribute to changes in body composition. As this GH insufficiency is due to hypothalamic pathogenesis, the availability of GH-releasing peptides (GHRPs), such as GHRP-6 (His-D-Trp-Ala-Trp-D-Phe-Lys-NH2) which is ac...
journal_title:European journal of endocrinology
pub_type: 临床试验,杂志文章
doi:10.1530/eje.0.1310499
更新日期:1994-11-01 00:00:00
abstract:OBJECTIVE:To evaluate the impact of long-term, non-suppressive levothyroxine (L-T(4)) treatment on quantitative ultrasonometry in women. DESIGN:This was a case-control study. SUBJECTS AND METHODS:Altogether 667 women (mean age+/-s.d., 49.5+/-13.1 years) were studied. Of these, 156 (23%) had non-toxic goitre or hypoth...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1420445
更新日期:2000-05-01 00:00:00
abstract::Systematic studies of autosomal dominant osteopetrosis (ADO) were followed by the identification of underlying mutations giving unique possibilities to perform translational studies. What was previously designated ADO1 turned out to be a high bone mass phenotype caused by a missense mutation in the first propeller of ...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-13-0136
更新日期:2013-07-13 00:00:00
abstract:OBJECTIVE:Although several studies reported increased oxidative stress in Hashimoto's thyroiditis (HT), the effect of levothyroxine treatment on oxidative status is not studied extensively. Therefore, we conducted this study to investigate the effects of levothyroxine replacement on oxidative stress in HT. DESIGN AND ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-15-1061
更新日期:2016-06-01 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:Congenital hypothyroidism (CH), the most common neonatal metabolic disorder, is characterized by impaired neurodevelopment. Although several candidate genes have been associated with CH, comprehensive screening of causative genes has been limited. DESIGN AND METHODS:One hundred ten patients with primary CH w...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-17-1017
更新日期:2018-06-01 00:00:00
abstract:OBJECTIVE:Investigate whether cholecalciferol supplementation leads to weight loss in overweight and obese adults. DESIGN:Randomized double blind clinical trial with 20,000 IU cholecalciferol twice a week, or 20,000 IU once a week plus placebo, or placebo twice a week, for 12 months. All subjects were given 500 mg cal...
journal_title:European journal of endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1530/EJE-08-0339
更新日期:2008-12-01 00:00:00
abstract:OBJECTIVE:Many investigators believe that basal adrenal venous sampling (AVS) should be done simultaneously, whereas others opt for sequential AVS for simplicity and reduced cost. This study aimed to evaluate the concordance of sequential and simultaneous AVS methods. DESIGN AND METHODS:Between 1989 and 2015, bilatera...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-16-0701
更新日期:2017-02-01 00:00:00
abstract:OBJECTIVE:To establish an Inuit body mass index (BMI) norm from a healthy, not malnourished, pure Inuit population and to investigate the development of overweight in the Inuit in Greenland. DESIGN:Longitudinal study with 35 years follow-up on overweight among Inuit in Greenland. METHODS:The heights and weights of 97...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1510735
更新日期:2004-12-01 00:00:00
abstract:BACKGROUND:17α-Hydroxylase/17,20-lyase deficiency (17OHD) caused by a mutation in the CYP17A1 gene is characterized by hypertension, hypokalemia, and abnormal development of the genitalia. The majority of CYP17A1 mutations are located in the coding sequence, and several intronic splicing site mutations have been report...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-10-0933
更新日期:2011-04-01 00:00:00
abstract::An increased calcitonin serum level is suggestive of a medullary thyroid cancer (MTC), but is not pathognomonic. The possibility of false positives or other calcitonin-secreting neuroendocrine neoplasms (NENs) should be considered. Serum calcitonin levels are generally assessed by immunoradiometric and chemiluminescen...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-20-0506
更新日期:2020-12-01 00:00:00
abstract::Glucocorticoids are potent osteopenic agents, producing negative calcium and bone balance via actions at many sites. The most significant adverse effects of glucocorticoid drugs on the skeleton are probably a direct inhibition of matrix synthesis by the osteoblast, reductions in calcium absorption in both the gut and ...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/eje.0.1370209
更新日期:1997-09-01 00:00:00
abstract:OBJECTIVE:The role of preoperative localisation of abnormal parathyroid glands remains controversial but is particularly relevant to the management of patients with recurrent or persistent hyperparathyroidism and familial syndromes. We report our experience of the use of selective parathyroid venous sampling (PVS) in t...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.1.02304
更新日期:2006-12-01 00:00:00
abstract:OBJECTIVES:Women with polycystic ovary syndrome (PCOS) frequently suffer from metabolic disturbances, in particular from insulin resistance. Accumulating evidence suggests that vitamin D deficiency may contribute to the development of the metabolic syndrome (MS). Hence, the aim of our study was to investigate the assoc...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0432
更新日期:2009-10-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to investigate the influence of age on the association between thyroid function and mortality. DESIGN:The Nijmegen Biomedical Study is a population-based study, comprising 5816 randomly selected adults of all age groups without previously known thyroid disease. METHODS:TSH, free th...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-13-1070
更新日期:2014-08-01 00:00:00
abstract:OBJECTIVE:Muscle mass plays an important role in determining cardiovascular and metabolic risks in polycystic ovary syndrome (PCOS). In addition, whether lean mass influences carotid intima-media thickness (IMT) in PCOS has not been assessed. DESIGN:Prospective investigation. METHODS:Ninety-five women with PCOS were ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0398
更新日期:2009-10-01 00:00:00
abstract::To study the involvement of gonadotropin-releasing hormone (GnRH) in glycosylation of circulating gonadotropin isoforms in anorexia nervosa (AN), 14 amenorrhoic patients with AN, 14 age-matched volunteers in early follicular phase, and five normal-weight re-fed patients with AN were investigated under baseline conditi...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1380076
更新日期:1998-01-01 00:00:00
abstract:INTRODUCTION:In genetically predisposed individuals, exogenous factors (including pollution) influence the development of Hashimoto's thyroiditis/chronic lymphocytic thyroiditis (CLT). CLT may also be a risk factor for associated thyroid cancer. Few data are available on the role of pollution from petrochemical complex...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-14-0864
更新日期:2015-04-01 00:00:00
abstract::This study has evaluated the behaviour of 3alpha-androstanediol glucuronide (3alpha-diol G) in 170 women of whom 85 had polycystic ovary syndrome (PCOS), 35 had idiopathic hirsutism (IH) and 50 had regular cycles (control group). Of the women with PCOS, 45 were hirsute (PCOS-H) and 40 were non hirsute (PCOS-NH). Women...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1380421
更新日期:1998-04-01 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:INTRODUCTION:Patients with craniopharyngioma (CP) have disturbances of the hypothalamic-pituitary axis and serious comorbidities such as obesity. We hypothesized that the secretion of hormones regulating the nutritional status is altered in adult patients with CP compared with patients with non-functioning pituitary ad...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-13-0832
更新日期:2014-03-13 00:00:00
abstract::Several lines of evidence suggest that tumor necrosis factor-alpha (TNFalpha) may contribute to the pathogenesis of autoimmune thyroid disease. It is not known, however, whether increased thyroidal TNFalpha levels are associated with changes in thyroid function. The purpose of the present study was to utilize in situ ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1390539
更新日期:1998-11-01 00:00:00
abstract:OBJECTIVE:To study whether serum parathyroid hormone (PTH) and serum calcium are associated with body mass index (BMI), and their predicting role in obesity. DESIGN:Population based, cross-sectional study. METHODS:In 2001 a population-based health survey was held in Tromsø, North Norway. Questionnaires on medical his...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1510167
更新日期:2004-08-01 00:00:00
abstract::The present study examined the changes in mRNA levels of a pituitary-specific trans-acting factor, Pit-1, and prolactin during the rat estrous cycle. Total cytoplasmic RNA was analyzed by Northern blot and slot-blot hybridization to examine the prolactin mRNA level. Reverse transcription-polymerase chain reaction (RT-...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1320771
更新日期:1995-06-01 00:00:00
abstract:OBJECTIVE:In a preliminary cross-sectional study, we discovered that DNA topoisomerase II autoantibodies (anti-TopII) were detected in 49.2% of 195 Chinese type 1 diabetes mellitus (type 1 DM) patients with a mean age of 14.5 years and a mean duration of disease of 4.6 years. In order to demonstrate the relationship be...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1420577
更新日期:2000-06-01 00:00:00
abstract:OBJECTIVE:C-peptide, a cleavage product of insulin, exerts biological effects in patients with type 1 diabetes mellitus, but its role in type 2 diabetes mellitus is controversial. Our aim was to examine the associations between fasting C-peptide levels and all-cause mortality, specific-cause mortality and the incidence...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-12-0085
更新日期:2012-08-01 00:00:00
abstract::Tumor necrosis factor-alpha (TNF-alpha) exerts various effects on many cell types. Acute administration of TNF-alpha to rats decrease hepatic 5'-deiodinase activity (5'D-I) and TNF-alpha has been implicated in the pathogenesis of the low triiodothyronine syndrome in non-thyroidal illness in humans. The thyroid, liver ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1300502
更新日期:1994-05-01 00:00:00