Abstract:
:We investigated the regulation of each intracellular signal transduction system including cyclic AMP (cAMP)-dependent and calcium (Ca2+) messenger systems in bovine adrenal fasciculo-reticularis cells to clarify the exact mode of action of ACTH. Pretreatment with primaquine and quinacrine, which are phospholipase A2 inhibitors, significantly inhibited cortisol production activated by both low and high concentrations of ACTH. Therefore, it seems that metabolites induced by phospholipase A2 are quite essential for cortisol synthesis induced by ACTH, either at low or high concentrations. At low concentrations of ACTH (10(-13)-10(-12) M), significant increases of cytosolic calcium ([Ca2+]i), but not of cAMP, were observed. Calphostin C, a specific protein kinase C inhibitor, apparently suppressed cortisol production activated by low concentrations of ACTH, while H-89, a specific inhibitor of cAMP-dependent protein kinase, did not. These findings suggest that, at physiologically low concentrations, ACTH activates [Ca2+]i and phospholipase A2 without affecting cAMP formation, resulting in an increased biosynthesis of cortisol, partly via protein kinase C-dependent processes. At high concentrations, ACTH (10(-9)-10(-7) M) induced an increase of cAMP and [Ca2+]i. The cortisol production induced by high concentrations of ACTH was significantly inhibited by pretreatment with calphostin C, H-89 and H-7, suggesting the participation of cAMP-dependent protein kinase and protein kinase C systems in the regulation of cortisol production in the presence of high concentrations of ACTH. In conclusion, cytosolic calcium is biphasically enhanced by ACTH, although cAMP accumulation is increased only by high concentrations of ACTH. A phospholipase A2-dependent process may partly play a crucial role in the regulation of cortisol biosynthesis, when stimulated by low and high concentrations of ACTH.
journal_name
Endocr Jjournal_title
Endocrine journalauthors
Omura M,Suematsu S,Nishikawa Tdoi
10.1507/endocrj.k07-015subject
Has Abstractpub_date
2007-08-01 00:00:00pages
585-92issue
4eissn
0918-8959issn
1348-4540pii
JST.JSTAGE/endocrj/K07-015journal_volume
54pub_type
杂志文章abstract::Clinical studies have shown that hyperhomocysteinemia is associated with bone fragility. Homocysteine (Hcy) induces apoptosis of osteoblastic cell lineage by increasing oxidative stress, which may contribute to Hcy-induced bone fragility. Statins, 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors, ameliorate ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ15-0480
更新日期:2016-04-25 00:00:00
abstract::The anti-programmed cell death-1 monoclonal antibody (mab), nivolumab has recently been approved for the treatment of unresectable or metastatic malignant melanoma and non-small-cell lung cancers in Japan. Ipilimumab, an anti-cytotoxic T lymphocyte antigen-4 mab for malignant melanoma that was approved earlier than ni...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ16-0161
更新日期:2016-10-29 00:00:00
abstract::A 19-year-old girl presented at our emergency room with hypokalemic periodic paralysis. She had a thyrotoxic goiter and had experienced three paralytic attacks during the previous 2 years on occasions when she stopped taking antithyroid drugs. In addition to thyrotoxic periodic paralysis (TPP), she had metabolic acido...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k09e-261
更新日期:2010-01-01 00:00:00
abstract::We here describe two patients with empty sella syndrome who had variable and abnormal ACTH and cortisol secretory profiles. The patients are a 58-year old male and a 41-year old female, both of whom were neurotic. In both cases, low-dose dexamethasone suppression tests (1 mg, p.o., overnight) caused variable responses...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.43.417
更新日期:1996-08-01 00:00:00
abstract::This study assessed the dose-dependent efficacy and safety of exenatide over 12 weeks in Japanese patients with type 2 diabetes suboptimally controlled despite therapeutic doses of sulfonylurea (SU), SU plus biguanide, or SU plus thiazolidinedione. Patients were randomly assigned to placebo (N = 40), 2.5 microg (N = 3...
journal_title:Endocrine journal
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1507/endocrj.k08e-296
更新日期:2009-01-01 00:00:00
abstract::Irisin is an adipokine/myokine which could be connected with insulin sensitivity. Polycystic ovary syndrome (PCOS) is characterized by oligo- or anovulation, polycystic ovary, hyperandrogenism and insulin resistance. The aim of the present study was to determine the relationship between serum irisin concentration and ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ16-0249
更新日期:2016-12-30 00:00:00
abstract::It has been suggested that metabolic syndrome (MetS) overlaps prediabetes and type 2 diabetes and that it is not necessary to consider it as a separate clinical entity. In the present study, patients with normoglycemia and dysglycemia were compared in terms of MetS frequency and MetS criteria characteristics, in order...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k07-036
更新日期:2007-12-01 00:00:00
abstract::The mechanisms of paradoxical TRH response in human somatotroph adenoma cells were investigated using intracellular calcium measurement and static incubation assay. Intracellular calcium measurement revealed that TRH induces a biphasic response: a transient increase followed by a sustained plateau. The transient phase...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.52.763
更新日期:2005-12-01 00:00:00
abstract::Thyrotropin-releasing hormone (TRH)-stimulated thyroid stimulating hormone (TSH) response in normal subjects is suppressed by oral glucose administration. Pharmacologic studies indicate that this suppressive action of glucose is mediated by an increase in hypothalamic somatostatin (SRIH) tone. Since activation of the ...
journal_title:Endocrine journal
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1507/endocrj.52.69
更新日期:2005-02-01 00:00:00
abstract::We previously developed a radioreceptor assay which is presumably specific for detection of blocking-type anti-TSH receptor (TSHR) antibodies using unsolubilized porcine TSHR. Employing this assay, we measured blocking TSH-binding inhibitory immunoglobulin (TBII) in the sera from 30 untreated Graves' patients and comp...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.48.703
更新日期:2001-12-01 00:00:00
abstract::We studied functional and histopathological changes in acromegalic cardiomyopathy following intermittent subcutaneous infusion of octreotide. A 68-year-old female patient with acromegaly associated with congestive heart failure due to dilated cardiomyopathy was initially treated with cardioactive medication for three ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.44.655
更新日期:1997-10-01 00:00:00
abstract::Familial hypocalciuric hypercalcemia (FHH) is a benign syndrome with elevated levels of serum calcium, relative hypocalciuria, and non-suppressed serum parathyroid hormone (PTH) levels. FHH usually occurs by a heterozygous mutation of the calcium sensing receptor (Casr), but some FHH patients show no mutations of the ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.47.29
更新日期:2000-02-01 00:00:00
abstract::The proteins found in cow milk have been reported to cause systemic inflammation. Endoplasmic reticulum (ER) stress is known to be involved in the development of several metabolic disorders including insulin resistance and non-alcoholic fatty liver disease. However, the effect of thiazolidinediones (TZDs) on ER stress...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.ej13-0167
更新日期:2013-01-01 00:00:00
abstract::Whether early surgical treatment of non-functioning pancreas islet cell tumor (NFPT) provides a favorable quality of life and life expectancy in patients with multiple endocrine neoplasia type 1 (MEN1) remains controversial. We analyzed the long-term clinical courses and surgical outcomes of 14 Japanese patients with ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k06-147
更新日期:2007-04-01 00:00:00
abstract::Carcinoma showing thymic-like differentiation (CASTLE) is a rare tumour of the thyroid, which arises from ectopic thymic tissue or remnants of branchial pouches. A systematic review of English literature evidences less than thirty cases; from them, it clearly appears that CASTLE is considered an indolent slow-growing ...
journal_title:Endocrine journal
pub_type: 杂志文章,评审
doi:10.1507/endocrj.k07e-147
更新日期:2008-08-01 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::A previous study reported a high prevalence of autoantibodies to alpha-enolase in lymphocytic hypophysitis and these antibodies efficiently distinguished lymphocytic hypophysitis from pituitary tumors. To confirm this, we examined autoantibodies to alpha-enolase in patients with lymphocytic hypophysitis (n = 17), pitu...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.50.697
更新日期:2003-12-01 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::The present study was undertaken to determine clinical features of hypopituitarism in elderly subjects. Thirty-one elderly patients with hypopituitarism were enrolled. They were 19 males and 12 females, with the ages of 70.7±5.4 years ranging from 62 to 80 years. High prevalence of hyponatremia (80.6%) and hypoglyc...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.ej12-0067
更新日期:2012-01-01 00:00:00
abstract::In cases of thyroid papillary carcinoma, a less aggressive cancer, surgeons may hesitate to perform total thyroidectomy on patients with poor general condition because these may experience longer survival without undergoing surgery. To investigate the influence of general patient condition on the patients' survival wh...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ16-0342
更新日期:2016-11-30 00:00:00
abstract::The measurement of TSH receptor antibody (TRAb) has been recommended to predict the risk of neonatal hyperthyroidism (NH) in pregnant women with Graves' disease (GD). For the first generation TRAb (TRAb1) assay with commercial kit (Brahms, Berlin, Germany; or Cosmic co., Tokyo, Japan) an arbitrary limit of 40 U/l or 5...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k06-196
更新日期:2007-08-01 00:00:00
abstract::Thyroid disease is known to be associated with pulmonary arterial hypertension (PAH). We investigated the prevalence of thyroid disease in patients with idiopathic PAH (IPAH) or heritable PAH (HPAH), and the factors affecting the pathogenesis of thyroid disease. We retrospectively evaluated 59 patients with IPAH or HP...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ17-0155
更新日期:2017-12-28 00:00:00
abstract::Angiotensin II (Ang II) is a well-known peptide that maintains the balance of electrolytes in the higher vertebrates. Ang II stimulation in the adrenal gland induces the synthesis of mineralocorticoids, mainly aldosterone, through the up-regulation of aldosterone synthase (CYP11B2) gene expression. Additionally, it ha...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.EJ20-0144
更新日期:2020-12-26 00:00:00
abstract::The purpose of this prospective study was to characterize the changes in serum levels of two proteins produced during the synthesis and degradation of type I collagen, i.e., the carboxyterminal propeptide of type I procollagen (PICP) and the pyridinoline cross-linked carboxyterminal telopeptide of type I collagen (ICT...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.46.337
更新日期:1999-04-01 00:00:00
abstract::A 70-year-old man with abdominal aortic aneurysm underwent surgical repair with Hemashield vascular graft. Postoperatively, he was found to have very low plasma cortisol levels, which failed to increase after stimulation with ACTH. A tentative diagnosis of adrenal insufficiency was made despite the lack of its clinica...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.k06-006
更新日期:2006-06-01 00:00:00
abstract::Triple A syndrome, also known as Allgrove syndrome, is a rare autosomal recessive disorder characterized by adrenal insufficiency, achalasia and alacrima. It has recently been reported that this syndrome is caused by mutations in the AAAS gene. In the present study, we analyzed the AAAS gene in a Japanese patient with...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.49.49
更新日期:2002-02-01 00:00:00
abstract::The octanoylation of Ser3 is essential for the biological function of ghrelin. We examined the concentrations of the n-octanoylated active-form ghrelin in cord and neonatal blood using an RIA system that specifically recognized n-octanoylated ghrelin, as well as a system that measured the total ghrelin concentration. ...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.52.271
更新日期:2005-04-01 00:00:00
abstract::Pregnancy in acromegalic patients is a rare event, but is usually uneventful, with stable GH and IGF-I levels and no tumor enlargement. Medical treatment can usually be withdrawn without problems and although no major adverse event has been reported, the suspension of drug treatments is generally recommended. No cas...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.ej11-0306
更新日期:2012-01-01 00:00:00
abstract::Hypertension and norepinephrine hypersecretion in a 59-year-old woman suffering from malignant pheochromocytoma with multiple metastases were appropriately controlled with alpha- and beta- blockers, and alpha-methyltyrosine (alpha-MT), a catecholamine-synthesis inhibitor. Metastasized vertebrae were treated with exter...
journal_title:Endocrine journal
pub_type: 杂志文章
doi:10.1507/endocrj.43.511
更新日期:1996-10-01 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