Abstract:
:The two pituitary gonadotrophins, luteinizing hormone (LH) and follicle-stimulating hormone (FSH), and in particular LH-stimulated high intratesticular testosterone (ITT) concentration, are considered crucial for spermatogenesis. We have revisited these concepts in genetically modified mice, one being the LH receptor (R)-knockout mouse (LuRKO), the other a transgenic mouse expressing in Sertoli cells a highly constitutively active mutated Fshr (Fshr-CAM). It was found that full spermatogenesis was induced by exogenous testosterone treatment in LuRKO mice at doses that restored ITT concentration to a level corresponding to the normal circulating testosterone level in WT mice, ≈5 nmol/L, which is 1.4% of the normal high ITT concentration. When hypogonadal LuRKO and Fshr-CAM mice were crossed, the double-mutant mice with strong FSH signaling, but minimal testosterone production, showed near-normal spermatogenesis, even when their residual androgen action was blocked with the strong antiandrogen flutamide. In conclusion, our findings challenge two dogmas of the hormonal regulation of male fertility: (1) high ITT concentration is not necessary for spermatogenesis and (2) strong FSH stimulation can maintain spermatogenesis without testosterone. These findings have clinical relevance for the development of hormonal male contraception and for the treatment of idiopathic oligozoospermia.
journal_name
Eur J Endocrinoljournal_title
European journal of endocrinologyauthors
Huhtaniemi Idoi
10.1530/EJE-18-0396subject
Has Abstractpub_date
2018-09-01 00:00:00pages
R143-R150issue
3eissn
0804-4643issn
1479-683Xpii
EJE-18-0396journal_volume
179pub_type
杂志文章,评审abstract:OBJECTIVE:Identification and characterization of calcium-sensing receptor (CASR) mutations in four unrelated Italian kindreds with familial hypocalciuric hypercalcemia. DESIGN:Clinical evaluation and genetic analysis of CASR gene. Functional characterization of mutated CASRs. METHODS:Direct sequencing of CASR gene in...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-08-0798
更新日期:2009-03-01 00:00:00
abstract:OBJECTIVE:Iodine deficiency has re-emerged in New Zealand, while selenium status has improved. The aim of this study was to investigate the effects of excess iodine intake as iodate on thyroid and selenium status. METHODS:In a randomized controlled trial on older people (mean±s.d. 73±4.8 years; n=143), two groups rece...
journal_title:European journal of endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1530/EJE-11-0575
更新日期:2011-11-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to evaluate the effect of intraoperative high-field (1.5 Tesla) magnetic resonance imaging (MRI) on the results of transsphenoidal surgery of GH-secreting pituitary macroadenomas. METHODS:Twenty-three acromegalic patients (mean tumor size, 25 +/- 12 mm; untreated preoperative GH, 4.2...
journal_title:European journal of endocrinology
pub_type: 临床试验,杂志文章
doi:10.1530/eje.1.01970
更新日期:2005-08-01 00:00:00
abstract::We studied the roles played by the renin-angiotensin system in inducing hypertension in nine patients with Cushing's syndrome (CS) resulting from adrenocortical adenoma, and compared them with those in patients with primary aldosteronism (PA), renovascular hypertension (RVH) and essential hypertension (EH). In the CS ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1310582
更新日期:1994-12-01 00:00:00
abstract:OBJECTIVE:To determine if human growth hormone (hGH) replacement therapy alters pharmacokinetics of hydrocortisone (CS) substitution in hypopituitary adults. DESIGN:To this aim, we analysed serum and salivary CS profiles 270 min after oral CS administration at baseline and 6 and 12 months after initiation of hGH repla...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1430769
更新日期:2000-12-01 00:00:00
abstract:OBJECTIVE:The relationship between thyroid function and the risk of venous thromboembolism (VTE) has not been addressed in population-based cohorts. We investigated the association between TSH levels and the risk of VTE in a general adult population. DESIGN:Population-based cohort study. METHODS:TSH was measured in 1...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-15-0185
更新日期:2015-07-01 00:00:00
abstract:BACKGROUND:Glucocorticoids are the mainstay of immunosuppression for active moderate-severe Graves' orbitopathy (GO). AIM:To analyze the response to therapy and the contribution of glucocorticoid receptor (GR) gene polymorphisms to the therapeutic outcome of intravenous glucocorticoids (IVGC) in active moderate-severe...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-13-0611
更新日期:2013-11-22 00:00:00
abstract:OBJECTIVE:Adiponectin and resistin have been linked to inflammation, endothelial dysfunction, and/or insulin secretion or resistance. It remains to be elucidated which of these adipokines is associated primarily with biomarkers of all or only some of these categories, i.e. biomarkers of inflammation, endothelial dysfun...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0555
更新日期:2010-02-01 00:00:00
abstract:Objective:Retrospective studies suggest that women have more active brown adipose tissue (BAT) than men, but little is known of the effect of fluctuating sex steroids across the menstrual cycle on thermogenesis in women. Design:To characterise the effects of sex and sex steroids on BAT activity we recruited healthy we...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-20-0184
更新日期:2020-09-01 00:00:00
abstract::Sex steroids are important for the growth and maintenance of both the female and the male skeleton. However, the relative contribution of androgens versus estrogens in the regulation of the male skeleton is unclear. Experiments using mice with inactivated sex steroid receptors demonstrated that both activation of the ...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-09-0118
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVE:Serum sclerostin levels have been reported to be inversely associated with serum 25OHD levels, but the effect of vitamin D and calcium supplementation on serum sclerostin levels is unknown. This study was carried out to determine whether vitamin D and calcium supplementation altered serum sclerostin levels in...
journal_title:European journal of endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1530/EJE-13-0862
更新日期:2014-03-13 00:00:00
abstract:OBJECTIVE:ATL1103 is a second-generation antisense oligomer targeting the human growth hormone (GH) receptor. This phase 2 randomised, open-label, parallel-group study assessed the potential of ATL1103 as a treatment for acromegaly. DESIGN:Twenty-six patients with active acromegaly (IGF-I >130% upper limit of normal) ...
journal_title:European journal of endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1530/EJE-18-0138
更新日期:2018-08-01 00:00:00
abstract:OBJECTIVE:A polymorphism near the promoter region of the IGF-I gene has been associated with serum IGF-I levels, body height and birth weight. In this study, we investigated whether this polymorphism is associated with body composition in young healthy subjects in two cohorts of different generations. DESIGN:Observati...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.1.02101
更新日期:2006-03-01 00:00:00
abstract:OBJECTIVE:In order to characterize urinary gonadotropin peptide (UGP) as an acute phase reactant, we focused on the UGP levels after surgical operation. DESIGN:Fifty cases of gastrointestinal cancer, 4 cases of cancers of other organs and 13 cases of benign digestive diseases were enrolled into this study. METHODS:UG...
journal_title:European journal of endocrinology
pub_type: 临床试验,杂志文章
doi:10.1530/eje.0.1400555
更新日期:1999-06-01 00:00:00
abstract::Postmenopausal hyperandrogenism is a state of relative or absolute androgen excess originating from either the adrenals and/or the ovaries, clinically manifested as the appearance and/or increase in terminal hair growth or the development of symptoms/signs of virilization. In either settings, physicians need to evalua...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-14-0468
更新日期:2015-02-01 00:00:00
abstract:OBJECTIVE:To determine the frequency of mutant alleles in the CYP21 gene in Spanish girls presenting with precocious pubarche (PP) and to assess the relationships between genotype and endocrine-metabolic variables. DESIGN:Fifty-three unrelated girls with a history of PP (14 prepubertal, 8 pubertal and 31 postmenarchea...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1470485
更新日期:2002-10-01 00:00:00
abstract::In non-functioning pituitary macroadenoma (NFMA), hyperprolactinaemia (hyperPRL) is considered to be a sign of hypothalamic-pituitary dysregulation, but it is unknown whether hyperPRL is associated with an increased frequency of pituitary hormone deficiencies. Forty consecutive patients with histology-proven NFMA were...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1350299
更新日期:1996-09-01 00:00:00
abstract::Glycoprotein hormone alpha-subunit (alpha SU) is a recognized product of clinically non-functioning, glycoprotein hormone-secreting and somatotroph adenomas but has not been studied systematically in corticotroph tumours. We have performed immunohistochemistry for alpha SU in a consecutive series of four corticotroph ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1330025
更新日期:1995-07-01 00:00:00
abstract:Objective:Statin therapy has been linked to an increased risk of type 2 diabetes in high-risk populations; however, the pathophysiology of this association remains to be clarified. We investigated glucagon suppression and its relationship with insulin resistance in prediabetic subjects undergoing atorvastatin therapy; ...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-19-0173
更新日期:2019-12-01 00:00:00
abstract::Nelson's syndrome is a potentially life-threatening condition that does not infrequently develop following total bilateral adrenalectomy (TBA) for the treatment of Cushing's disease. In this review article, we discuss some controversial aspects of Nelson's syndrome including diagnosis, predictive factors, aetiology, p...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-10-0466
更新日期:2010-10-01 00:00:00
abstract::We have identified and characterized insulin-like growth factor I (IGF-I) and IGF-II/mannose-6-phosphate (IGF-II/M6P) receptors in bovine adrenal cells. Iodine-125-labeled IGF-I ([125I]IGF-I) binding was characteristic of the IGF-I receptor, and binding kinetics as well as receptor densities were similar in cortical a...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1300265
更新日期:1994-03-01 00:00:00
abstract::Anorexia nervosa is a syndrome, that is collections of symptoms, which is not defined by its etiology. The severe cases are intractable. The syndrome is associated with multiple, profound endocrine alterations which may be adaptive, reactive or etiologic. Adaptive changes potentially may be inappropriate in clinical s...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-18-0596
更新日期:2019-01-01 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::Thyrotropin (TSH)-secreting adenomas (TSHomas) are the rarest form of pituitary adenomas, and most endocrinologists will see few cases in a lifetime, if any. In most cases, the diagnostic approach is complicated and cases may be referred after being presented as a syndrome of inappropriate TSH secretion or as a pituit...
journal_title:European journal of endocrinology
pub_type: 杂志文章,评审
doi:10.1530/EJE-16-1029
更新日期:2017-10-01 00:00:00
abstract:BACKGROUND:An increased cardiovascular risk and mortality in hypopituitary patients receiving conventional hormonal treatment without GH replacement have been shown in several studies. Various atherogenic risk factors including endothelial dysfunction - an early event in the atherogenesis - are more expressed in adults...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1470333
更新日期:2002-09-01 00:00:00
abstract::Corticotrophin-releasing hormone (CRH) causes vasodilatation in the human fetal-placental circulation and has paracrine actions in placental tissue, suggesting that CRH receptors may be present in the human placenta. We have now identified and characterized placental CRH binding sites and compared them to those descri...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1330591
更新日期:1995-11-01 00:00:00
abstract:Objectives:Inoperable or metastatic paragangliomas (PGLs) and malignant pheochromocytomas (PCCs) are rare tumours with limited options for systemic treatment. Aim of this study was to assess the safety and efficacy of the radiolabelled somatostatin analogue (177LutetiumDOTA0-Tyr3)octreotate (177Lu-DOTATATE) for the tre...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-18-0901
更新日期:2019-07-01 00:00:00
abstract:OBJECTIVE:Free fatty acids (FFAs) deplete the intracellular insulin stores of pancreatic beta-cells. It has been suggested that this results from a lipotoxic dysregulation of both insulin secretion and insulin synthesis. In the present study, this hypothesis was tested within a 12-h time-course by directly relating the...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/eje.0.1480481
更新日期:2003-04-01 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:Previous evidence has suggested that a low sex hormone-binding globulin (SHBG) concentration is associated with insulin-resistance and a low adiponectin concentration. We investigated the association between SHBG and the risk of hyperglycemia in each sex and we determined potential interactions between SHBG a...
journal_title:European journal of endocrinology
pub_type: 杂志文章
doi:10.1530/EJE-09-0202
更新日期:2009-07-01 00:00:00