Abstract:
:This report describes the results of the second part of the collaborative study organized by a working group sponsored by the Community Bureau of Reference of the European Community Commission. The whole study was designed to understand the causes of discrepancy among LH immunoassay methods. In the parent report we described the characteristics of LH monoclonal antibodies. In the present work we focused on the comparison of 11 commercially available monoclonal antibody based kits and one polyclonal antibody based RIA. Recovery experiments of the second IS 80/552 and of a related LH preparation showed that curve calibration differed among kits. The ratio between the LH recovery of the two most different kits was 2.30. LH concentrations were determined, using the 12 assay methods in the sera of prepubertal children (n = 46), normal women (n = 26) and men (n = 39) before and after LHRH stimulation, post-menopausal women (n = 29) and patients with renal failure (n = 71) or polycystic ovaries (n = 28). In children LH was detected in 0 to 80% of the sera depending on the kit. In adults, the mean LH concentration provided by the 12 kits varied from 6.0 to 13.55 IU/L showing a ratio of 2.26 between the two most different kits. A thorough statistical analysis allowed to distinguish two groups of kits. The first groups consisting of 6 kits provided results close to those obtained by the RIA. The 5 other kits misrecognized circulating LH in subjects with various clinical status. These 5 kits were the only ones to use, as labelled probes, monoclonal antibodies specific for the holohormone (anti-alpha beta) whereas the 6 other kits used, as labelled probes, monoclonal antibodies directed to the alpha (1 kit) or the beta-subunit (5 kits). In both groups, the coated monoclonal antibodies are directed to either the beta-subunit (1/6 and 2/5 kits) or the holohormone (5/6 and 3/5 kits). Taken together these data suggest that discrepancy among LH assay kits is related to variation in standard curve calibration and in epitope specificity of monoclonal antibodies used in the kits. These findings may prove to be instrumental to alleviate differences among LH assay methods.
journal_name
J Endocrinol Investjournal_title
Journal of endocrinological investigationauthors
Costagliola S,Niccoli P,Florentino M,Carayon Pdoi
10.1007/BF03347727subject
Has Abstractpub_date
1994-06-01 00:00:00pages
407-16issue
6eissn
0391-4097issn
1720-8386journal_volume
17pub_type
临床试验,杂志文章abstract::In a 41-year-old hirsute woman, severe hypercalcemia led to the discovery of hyperparathyroidism related to the involvement (hyperplasia/or adenoma) of the 4 parathyroid glands. Plasma and urinary DHA, plasma DHA-sulfate and delta 5 steroid precursors were elevated. Steroid hormone hypersecretion was stimulated by hCG...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347005
更新日期:1987-12-01 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::It has previously been suggested that ghrelin mediates GH-independent biologic activities on the heart. We investigated the acute effects on cardiac contraction of a single iv administration of human ghrelin (in a dose of 1 microg/kg) in severe untreated GH deficient subjects. Prior to the ghrelin infusion, an echocar...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章
doi:10.1007/BF03347499
更新日期:2004-07-01 00:00:00
abstract::Forty-three euthyroid patients with a single, solid, nonfunctioning thyroid nodule were submitted to fine needle aspiration biopsy and serum thyroglobulin (Tg) was measured before and after (48h) 10 U of bovine TSH. Twenty-two normal subjects were also submitted to the bTSH test. Patients with nonfunctioning nodules w...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348125
更新日期:1987-06-01 00:00:00
abstract::The Authors have studied the effects of somatostatin (SRIF) treatment in an infant affected by hypoglycemia due to nesidioblastosis. During iv infusion with SRIF we observed a marked increase of blood glucose levels; concomitantly insulin secretion was almost completely suppressed. In contrast, during treatment with p...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350454
更新日期:1981-04-01 00:00:00
abstract:BACKGROUND:While it is now accepted that genes and their products affect food intake, the concept that locomotor behavior or the propensity for physical activity is controlled by neuro hum oral regulators is frequently underappreciated. In mammals, complex interactions have developed to allow the cross-talk between fue...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:10.1007/s40618-014-0225-z
更新日期:2015-02-01 00:00:00
abstract::We have measured eye muscle antibodies, in immunoblotting, in the serum from five patients with severe ophthalmopathy associated with Graves' hyperthyroidism who underwent plasmapheresis, correlating their levels with clinical features of the eye disorder and response to treatment. Blood taken before each plasma excha...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348906
更新日期:1993-10-01 00:00:00
abstract::Ghrelin is a 28-amino-acid hormone produced mainly by the stomach which strongly promotes food intake. It is the only known peripheral orexigenic hormone that induces the release of GH. Ghrelin has been proposed as a link between the enteric system and central regulation of energy balance and growth. Although it has r...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350806
更新日期:2007-10-01 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::Aromatase activity for androstenedione was measured in stromal cells of human uterine endometrium throughout the menstrual cycle. The effect of progestogen on aromatase activity was also examined in the endometrial stromal cells. Aromatase activity tended to be high in the proliferative cells compared to the secretory...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03349962
更新日期:1989-03-01 00:00:00
abstract::Androgens' metabolism and activity are gaining a more and more important role in human physiology particularly referring to aging and to neurodegenerative diseases. Androgen treatment is often required for long-lasting disorders. In order to improve their duration and effects, androgens can be administered as esters o...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.3275/8655
更新日期:2013-06-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to investigate the hypothesis that interleukin-1beta (IL-1beta) might be involved in the increase of the circulating levels of placental-derived CRH leading to the initiation of pre-term labor. SUBJECTS AND METHODS:Forty-eight primigravidae with a singleton viable pregnancy between ...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347393
更新日期:2007-01-01 00:00:00
abstract::The present study was performed in 30 patients who needed steroid therapy: courses of triamcinolone or DTM 8-15 given orally lasted 30 days. In 15 of these patients glucoactive corticosteroids were administered in combination with 5 micrograms/day of 25OH-vitamin D3 (25OHD3). 47Calcium oral test and 99mTc-MDP kinetics...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348448
更新日期:1984-10-01 00:00:00
abstract::Somatostatin and its derivatives have been predominantly studied and succesfully used in endocrinological diseases. This article reviews the rationale of the use of somatostatin and its derivatives in ophthalmology based on current understanding of its action in the eye and summarizes previously published controlled s...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:
更新日期:2005-01-01 00:00:00
abstract::Recent data seem to suggest that LHRH may be involved in the modulation of PRL secretion. We studied the PRL pattern in 9 males (age range 18-38 yr) with idiopathic hypogonadotropic hypogonadism (IHH) before and during long-term pulsatile LHRH therapy (120-160 ng/kg bw every 120 min sc) in order to evaluate variations...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350751
更新日期:1989-09-01 00:00:00
abstract:OBJECTIVE:Subcutaneous insulin absorption is one of the key factors affecting glycemic control in patients with diabetes mellitus under insulin therapy. Insulin-induced subcutaneous lipohypertrophy has been reported to impair insulin regular absorption and hence glycemic control. So far, lipohypertrophy diagnosis has o...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-017-0675-1
更新日期:2017-10-01 00:00:00
abstract:AIM:To evaluate if nutritional intakes and lipid profile fulfill international guidelines and recommendations before and after a structured dietician training to a Mediterranean- style diet in an Italian pediatric population with Type 1 diabetes. METHODS:A 6-month prospective cohort study. Baseline and after-intervent...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章
doi:10.3275/7755
更新日期:2012-02-01 00:00:00
abstract::Thyrotropin-releasing hormone (TRH)-like material was found in human retina obtained at autopsy from eyes used for corneal grafts. The TRH-like material was extracted with methanol and was found to be indistinguishable from synthetic TRH in its immunoreactivity and bioreactivity and in its proteolytic degradation by f...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348274
更新日期:1980-07-01 00:00:00
abstract::Serum testosterone, luteinizing hormone (LH), follicle-stimulating hormone (FSH) and prolactin (PRL) responses to exposure to sea-level altitude (LA) were examined in 13 eugonadal males, age 21-22 yr, 3 and 5 days after residing at LA and on the second day of return to basal altitude 90 days later. After 3 days at the...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350195
更新日期:1988-09-01 00:00:00
abstract:BACKGROUND:Glucagon-like peptide-1 (GLP-1) and its potent analog, exendin-4, are well known to inhibit β- cell apoptosis and promote β-cell proliferation. Meanwhile, cytokines, such as interleukin-1β (IL-1β), stimulate inducible nitric oxide synthase (iNOS) expression and nitric oxide overproduction leading to β-cell d...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.3275/8938
更新日期:2013-11-01 00:00:00
abstract:BACKGROUND:Depressive disorder encompasses a wide spectrum of somatic and psychological symptoms. It is not known whether there are differences regarding the cluster of depressive symptomatology between subjects with depression with and without T2DM. PURPOSE:To explore whether the cluster of depression that prevails a...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-019-01020-x
更新日期:2019-08-01 00:00:00
abstract:PURPOSE:Initial surgery for medullary thyroid cancer (MTC) with no evidence of lymph node involvement in neck compartments consists of total thyroidectomy and prophylactic central neck dissection. This study evaluated the reliability of a radiotracer technique for the intraoperative detection of sentinel lymph nodes (S...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-014-0112-7
更新日期:2014-09-01 00:00:00
abstract:PURPOSE:Intravenous glucocorticoids (ivGCs) given as 12-weekly infusions are the first-line treatment for moderate-to-severe and active Graves' orbitopathy (GO), but they are not always effective. In this study, we evaluated whether response at 6 weeks correlated with outcomes at 12 (end of intervention) and 24 (follow...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-017-0608-z
更新日期:2017-05-01 00:00:00
abstract::The last decade has witnessed an upsurge of interest in the research on facial attractiveness. The development of computer graphics has allowed to objectively investigate the conserved features of attractive faces. Averageness, symmetry and sex-specific traits have been associated with attractiveness. The effect of av...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:
更新日期:2003-01-01 00:00:00
abstract::Metabolic diseases are associated with chronic low-grade inflammation, which has been indicated as a potential mediator of endothelial dysfunction and cardiovascular disease. Visceral adiposity is thought to be the starting condition of the inflammatory state through the release of inflammatory cytokines, including TN...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:10.1007/s40618-018-0872-6
更新日期:2018-11-01 00:00:00
abstract:BACKGROUND:The coexistence of insulin and ACTH hypersecretion in the same patient is extremely rare. A diabetic patient with a pancreatic endocrine tumor (PET) co-secreting insulin and ACTH is even rarer and has never been described. The combination of these two endocrine syndromes results in a peculiar clinical pictur...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347062
更新日期:2011-03-01 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::Raloxifene (RLX), a selective estrogen receptor modulator (SERM), is currently indicated for the prevention and treatment of post-menopausal osteoporosis. At present, RLX is evaluated in other areas of study that include the reduction of the risk of breast cancer and cardiovascular (CV) disease in post-menopausal wome...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:
更新日期:2005-01-01 00:00:00
abstract::Nine chronic male alcoholics presenting with hypogonadism but without overt liver failure were examined under baseline conditions and after acute injection of gonadotropin releasing hormone (GnRH, 100 micrograms iv) and thyrotropin releasing hormone (TRH, 200 micrograms iv), performed at 60 min of a 3-h infusion of sa...
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/BF03348339
更新日期:1983-12-01 00:00:00
abstract:BACKGROUND:The data about cardiovascular (CV) changes in patients with asymptomatic primary hyperparathyroidism (PHPT) are scarce. AIM:The aim of this study is to compare cardiac structure and functions in patients with asymptomatic PHPT and controls by using tissue Doppler echocardiography. SUBJECTS AND METHODS:Thir...
journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.3275/8961
更新日期:2013-11-01 00:00:00