Abstract:
:Gonadotropin-releasing hormone (GnRH) and its agonists have been known to directly affect steroid hormone production in human granulosa cells. In this study, we examined effects of GnRH on Ca2+ mobilization, protein kinase C activity and steroidogenesis of human granulosa cells. Human granulosa cells were harvested by aspiration of follicles during oocyte retrieval for IVF. Test substances, that is, GnRH agonist ([D-Ser(TBu)6]-LHRH-EA), 12-O-tetradecanoyl-phorbol-13-acetate (TPA), A23187, 1-(5-isoquinolinylsulfonyl)-2-methylpiperazine (H-7) and nordihydroguaiaretic acid (NDGA) were added to HTF medium with human granulosa cells. At the end of a 5-h incubation period, progesterone and estradiol in the medium were extracted and measured. GnRH agonist (10(-9)M and 10(-8)M) significantly stimulated (P < 0.05) progesterone and estradiol accumulation in the medium. TPA (10(-7)M, 10(-8)M and 10(-9)M) also significantly stimulated (P < 0.05) progesterone accumulation. A23187 (10(-6)M) significantly stimulated progesterone accumulation (P < 0.05) and significantly enhanced (P < 0.05) the stimulatory effect of TPA on progesterone production. H-7 (10(-3)M, 10(-4)M and 10(-5)M) and NDGA (10(-3)M, 10(-4)M and 10(-5)M) significantly inhibited (P < 0.05) the effect of GnRH agonist on progesterone and estradiol production by the granulosa cells. The granulosa cells were loaded with 4 microM Fura 2-AM, and the ratio of the intensities of fluorescent emission at 510 nm with excitation at 340 and 380 nm was calculated at 100-ms intervals. GnRH agonist (10(-7)M and 10(-6)M) increased (P < 0.05) [Ca2+]i significantly as compared with the control. These results suggested that the effects of GnRH on progesterone and estradiol production in human granulosa cells were mediated partially by calcium mobilization and partially by C-kinase activity, and protein kinase C, [Ca2+]i and lipoxygenase were suspected of being important intracellular messages for GnRH in human granulosa cells.
journal_name
Endocr Jjournal_title
Endocrine journalauthors
Hori H,Uemura T,Minaguchi Hdoi
10.1507/endocrj.45.175subject
Has Abstractpub_date
1998-04-01 00:00:00pages
175-82issue
2eissn
0918-8959issn
1348-4540journal_volume
45pub_type
杂志文章abstract::A series of chimeric TSH-LH/CG receptors were constructed by substituting homologous segments of the extracellular domain of the rat TSH receptor with corresponding segments of rat LH/CG receptor: C1 (amino acids 37-123 substituted), C2 (91-112), C3 (173-234), C4 (233-266), C5 (268-304), C6 (112-305) and C7 (36-404). ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.40.363
更新日期:1993-06-01 00:00:00
abstract::Administration of monosodium L-glutamate (MSG) to neonatal mice produces a hypothalamic syndrome consisting of stunted growth and later development of obesity. We assayed plasma insulin (IRI), thyroxine (T4) and insulin-like growth factor-I (IGF-I) to investigate their roles in the growth of the mice. Two mg/g body we...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.40.461
更新日期:1993-08-01 00:00:00
abstract::Estrogen has been shown to stimulate lactotroph proliferation and expression of the prolactin (PRL) gene. Recently it has been established that Pit-1, a pituitary-specific transcription factor, is required for lactotroph proliferation. Furthermore, in vitro studies showed that an increase in the PRL promoter activity ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.41.579
更新日期:1994-10-01 00:00:00
abstract::Thyroid cancer and Graves' disease may present simultaneously in one patient. The incidence of the development of hyperthyroidism from metastatic differentiated thyroid carcinoma is rare. We herein report a case of metastatic follicular carcinoma complicated with Graves' disease after total thyroidectomy. A 57-year-ol...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ17-0220
更新日期:2017-12-28 00:00:00
abstract::Type 2 diabetes is a serious threat to human health all over the world. It is particularly important to look for the pathogenesis of type 2 diabetes. Researchers have found that obesity was associated with a broad chronic inflammatory response and type 2 diabetes. And tumor necrosis factor alpha (TNF-α) is one of the ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ17-0539
更新日期:2018-06-27 00:00:00
abstract::We report on two siblings with classic simple virilizing 21-hydroxylase deficiency whose neonatal screening for serum 17alpha-hydroxyprogesterone (17-OHP) gave normal results. The proband, a girl with clitoromegaly whose screening 17-OHP value had been 9.2 ng/ml, was diagnosed at the age of 6 months, and her elder bro...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.45.427
更新日期:1998-06-01 00:00:00
abstract::To assess the daily iodine intake in a population study, we have compared the validity and degree of reliability of the urine iodide/creatinine ratios and iodide concentrations of casual samples as a representative index of daily urine iodide excretion. The morning urine samples were obtained from apparently healthy 2...
journal_title:Endocrine journal
pub_type: 临床试验,杂志文章
doi:10.1507/endocrj.40.163
更新日期:1993-02-01 00:00:00
abstract::The aim of this study was to assess the effect of the long-term different diabetic therapies on the plasma leptin level in type 2 diabetic subjects. We measured plasma leptin, body fat and fasting plasma insulin in 96 type 2 diabetic male subjects. They had received the same treatment regimen for more than one year (3...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.48.377
更新日期:2001-06-01 00:00:00
abstract::Sirtuin1 (SIRT1) is activated during calorie restriction and appears to be related to energy balance through glucose or lipid metabolism and insulin signaling. These findings suggest that SIRT1 may play a role in the pathophysiology of visceral obesity. Therefore, we investigated the relationship between SIRT1 gene ex...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.ej13-0207
更新日期:2013-01-01 00:00:00
abstract::Decreased circulating levels of adiponectin, a novel adipose-derived adipocytokine, in obesity possibly contribute to the development of insulin resistance which is a major factor in the pathogenesis of type 2 diabetes. The present study was conducted to examine whether circulating and adipose tissue adiponectin level...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.52.427
更新日期:2005-08-01 00:00:00
abstract::Pathogenesis of pseudohypoparathyroidism type 1b (PHP-1b) is related to the loss of methylation at the GNAS exon A/B region, which is combined with epigenetic defects at other differentially methylated GNAS regions in most sporadic cases. In this study, we established a method for evaluating the methylation status of...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k10e-364
更新日期:2011-01-01 00:00:00
abstract::In each estrous cycle not all follicles recruited grow to ovulate, as some degenerate through the process of atresia. Apoptosis is the mechanism underlying follicle atresia. TGF-beta1 has been implicated in the induction and promotion of apoptosis in many cell types and it is expressed in the ovary. In this study immu...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.47.475
更新日期:2000-08-01 00:00:00
abstract::We demonstrated severe hyponatremia in a 68 year-old man who had pituitary tumor. He had poor appetite and was disoriented. Tests revealed hyponatremia of 110 mmol/l, and he was admitted to Jichi Medical School Omiya Medical Center to undergo further tests. Physical findings revealed disturbance of consciousness with ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.51.435
更新日期:2004-08-01 00:00:00
abstract::Since 1989, neonatal mass screening for congenital adrenal hyperplasia (CAH) has been carried out in Japan. The mass screening has detected not only the patients with the classic form of steroid 21-hydroxylase deficiency (21-OHD), but also those with the nonclassic (NC) form of 21-OHD, and the molecular basis in these...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k07-028
更新日期:2007-12-01 00:00:00
abstract::Defects in insulin receptor function have been associated with insulin resistant states such as obesity and type 2 diabetes mellitus. Several types of mutations in the insulin receptor gene have been identified in patients with genetic syndromes of extreme insulin resistance. We have studied a 10-year-old Japanese gir...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.52.499
更新日期:2005-08-01 00:00:00
abstract::Genetic linkage analyses have traced the loci for multiple endocrine neoplasia type 2A (MEN 2A) to an interval on chromosome 10q11.2. This region encompasses the RET proto-oncogene, a receptor tyrosine kinase gene expressed in medullary thyroid carcinoma (MTC) and pheochromocytoma. By means of genomic polymerase chain...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.42.527
更新日期:1995-08-01 00:00:00
abstract::TSH receptor antibody (TRAb) titer has been reported to be correlated with Graves' ophthalmopathy (GO). However, the correlation between GO activity and TRAb titer assessed with a third-generation assay has not been reported. We enrolled 238 untreated Graves' disease patients who came to the outpatient clinic of Ito H...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ15-0137
更新日期:2016-01-01 00:00:00
abstract::To evaluate the usefulness of monitoring serum sialic acid (SA) levels for diagnosis and follow-up of subacute granulomatous thyroiditis (SAT), 43 patients were studied at our clinic. In the acute phase of the disease their SA levels averaged 104.9 +/- 19.7 mg/dl (normal 44-69 mg/dl). In the recovery phase SA levels r...
journal_title:Endocrine journal
pub_type: 临床试验,杂志文章
doi:10.1507/endocrj.40.83
更新日期:1993-02-01 00:00:00
abstract::Postprandial hyperglycemia and/or hyperlipidemia can contribute to development of atherosclerosis in patients with type 2 diabetes mellitus (T2DM). The objective of this study was to compare the effects of miglitol and sitagliptin on postprandial glucose and lipid metabolism in patients with T2DM. Thirty-five patients...
journal_title:Endocrine journal
pub_type: 杂志文章,随机对照试验
doi:10.1507/endocrj.ej13-0019
更新日期:2013-01-01 00:00:00
abstract::The tissue-specific circulating markers of thyroid hormone action on cardiac function have not been established. Although the relationship between thyroid function and plasma brain natriuretic peptide (BNP) levels has been evaluated in patients with thyroid disorders, the relationship between these parameters in the g...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ19-0380
更新日期:2020-04-28 00:00:00
abstract::Polycystic ovary syndrome (PCOS) is common in obese women with insulin resistant type 2 diabetes for which metformin treatment is getting established in addition to clomiphene. However, lean PCOS patients are sometimes accompanied with type 1 diabetes. It remains unclear whether these patients are insulin resistant an...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ15-0548
更新日期:2016-01-01 00:00:00
abstract::The inflammatory biomarkers that fully characterize the metabolically unhealthy (MU) state-which is a risk factor for cardiovascular disease (CVD)-remain unclear. Recent studies suggest follistatin-like protein 1 (FSTL1) could be used as a biomarker for inflammation and CVD, however there is little information on FSTL...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ18-0352
更新日期:2019-03-28 00:00:00
abstract::Age is an important prognostic factor in papillary thyroid carcinoma (PTC). In this study, we investigated the difference in prognosis of 7 subsets of PTC patients without distant metastasis at presentation or a history of radiation exposure (20 years or younger, 21-30 years, 31-40 years, 41-50 years, 51-60 years, 61...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.ej12-0044
更新日期:2012-01-01 00:00:00
abstract::Progression to overt hypothyroidism and the associated adverse effects on lipid metabolism and the cardiovascular system are major concerns for patients diagnosed with subclinical hypothyroidism (SCH). No consensus regarding the clinical parameters associated with prognosis for this mild thyroid dysfunction has yet be...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k09e-154
更新日期:2010-01-01 00:00:00
abstract::Adult growth hormone deficiency (GHD) is a well defined clinical condition, which is characterized by abnormal body composition, impaired physical activity and decreased quality of life. In addition, in recent years, growing interest has been shown towards cardiovascular risks in adult patients affected by GHD. In thi...
journal_title:Endocrine journal
pub_type: 杂志文章,评审
doi:10.1507/endocrj.EJ15-0337
更新日期:2015-01-01 00:00:00
abstract::We saw a 57-yr-old female non-insulin dependent diabetes mellitus (NIDDM) patient with antiinsulin antibody, in whom insulin-like growth factor-I (IGF-I) was shown to be effective as a blood glucose-lowering agent. Due to the presence of the antibody, the patient suffered from postprandial hyperglycemia and frequent h...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.42.101
更新日期:1995-02-01 00:00:00
abstract::The present study set forth the reference values for penile size and determined the prevalence of buried penis in Japanese full-term newborns. The stretched penile length was measured and the presence of buried penis was assessed at 1-7 days of age in 547 Japanese full-term newborn infants born between 2008 and 2012 i...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.ej14-0069
更新日期:2014-01-01 00:00:00
abstract::The incidence of noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) in papillary thyroid carcinoma (PTC) is significantly lower in Asian countries than Western countries; however, the difference remains unexplained. This study aimed to evaluate the incidence of NIFTP in tumors diagnos...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ20-0198
更新日期:2020-10-28 00:00:00
abstract::Although gonadal estrogens are known to facilitate the development of skeletal lesion in SHOX haploinsufficiency, controversy exists as to whether gonadal estrogens are disadvantageous to pubertal growth. To clarify this matter, we analyzed growth pattern in 31 Japanese patients with a normal karyotype and molecularly...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.51.197
更新日期:2004-04-01 00:00:00
abstract::The serum T3 to T4 ratio is a useful indicator for differentiating destruction-induced thyrotoxicosis from Graves' thyrotoxicosis. However, the usefulness of the serum free T3 (FT3) to free T4 (FT4) ratio is controversial. We therefore systematically evaluated the usefulness of this ratio, based on measurements made u...
journal_title:Endocrine journal
pub_type: 杂志文章,多中心研究
doi:10.1507/endocrj.52.537
更新日期:2005-10-01 00:00:00