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Endocrine Journal

Jiaqi Zou, Xinpu Gao, Tengli Liu, Rui Liang, Yaojuan Liu, Guanqiao Wang, Le Wang, Na Liu, Peng Sun, Zhiping Wang, Shusen Wang, Zhongyang Shen
Type 1 diabetes mellitus (T1DM) is a syndrome of loss of glucose homeostasis caused by the loss of β cell chronic autoimmunity against islet cells. Islet-specific epitopes coupled antigen presenting cells by Ethylenecarbodiimide (ECDI) is a promising strategy to induce antigen-specific tolerance. However, single epitope induced tolerance is insufficient to prevent the onset of T1DM. The aim of this study is to evaluate the efficacy of whole islet antigens in preventing the onset and progression of T1DM and identify the underlying immune mechanism in NOD mice...
July 10, 2018: Endocrine Journal
Kazunori Kageyama, Satoru Sakihara, Wataru Kameda, Aya Sugiyama, Shinobu Takayasu, Ken Terui, Makoto Daimon
Thyrotropin (TSH)-producing adenomas are a rare cause of hyperthyroidism and are a type of functional pituitary adenoma. The diagnosis of TSH-producing adenoma is a challenging problem in clinical endocrinology. Since growth hormone-releasing peptide-2 (GHRP-2) fails to induce TSH secretion in normal subjects, the effect of GHRP-2 on TSH levels was therefore examined in patients with TSH-producing adenomas. A total of 5 patients (4 women and 1 man) referred to our departments for further evaluation of pituitary hormones were followed-up using the GHRP-2, TSH-releasing hormone (TRH), octreotide, and bromocriptine tests to examine and evaluate TSH secretory dynamics in TSH-producing adenomas...
July 5, 2018: Endocrine Journal
Junta Imai
In insulin-resistant states such as obesity, pancreatic β-cells proliferate to prevent blood glucose elevations. However, the mechanism(s) by which obesity induces compensatory β-cell responses is not fully understood. Recently, several studies have shown that signals from the liver, such as neuronal signals or humoral factors, regulate β-cell proliferation during obesity development. We previously reported a liver-brain-pancreas neuronal relay, consisting of afferent splanchnic nerves, the central nervous system and efferent vagal nerves, to promote this compensatory β-cell proliferation...
July 3, 2018: Endocrine Journal
Hang Zhao, An Song, Yunjia Zhang, Yunfeng Zhen, Guangyao Song, Huijuan Ma
Previous studies have shown a relationship between type 2 diabetes mellitus and birth weight. We performed this meta-analysis to resolve the problem of inconsistent results. We conducted a literature search of PubMed, Embase and the Cochrane Library using "Diabetes Mellitus, Type 2," "Birth Weight," and some related free words. Twenty-one studies were included in accordance with inclusion and exclusion criteria, involving a total of 313,165 participants and 22,341 type 2 diabetes mellitus cases...
June 28, 2018: Endocrine Journal
Ach Taieb, Hasni Yosra, Maatoug Jihen, Ben Abdelkarim Asma, Kacem Maha, Chaieb Molka, Sonia Rouatbi, Zaouali Monia, Ach Koussay
Diagnosis of adrenal insufficiency requires evaluation by dynamic stimulation tests. The insulin tolerance test (ITT) is accepted as the gold-standard test for the evaluation of hypothalamo-pituitary-adrenal (HPA) axis but the test is unpleasant and dangerous. Although it takes more time, glucagon stimulation test (GST) is a good alternative to ITT. The primary aim of this study was to compare the ITT and GSTs in the evaluation of HPA axe in patients with pituitary disorders. We conducted a prospective study in which ITT and GST were performed within 7 days in 81 patients...
June 27, 2018: Endocrine Journal
So-Young Kwak, Clara Yongjoo Park, Garam Jo, Oh Yoen Kim, Min-Jeong Shin
Vitamin D deficiency affects >60% of the Korean population. Recent reports in Caucasian, African American, and Chinese populations indicate an association between vitamin D status and related single nucleotide polymorphisms (SNPs), but specific associations differ among study populations. We investigated the relationship between five SNPs involved in the vitamin D metabolic pathway (DHCR7 rs12785878, GC rs2282679, CYP2R1 rs12794714, CYP2R1 rs10741657, and CYP24A1 rs6013897) and serum 25-hydroxyvitamin D [25(OH)D] status in Koreans using the Korea National Health and Nutrition Examination Survey, a nationwide database...
June 22, 2018: Endocrine Journal
Fotini Adamidou, Panagiotis Anagnostis, Kostas Boboridis, Christina Manani, Thomas Georgiou, Stavroula Veneti, Marina Kita
Intravenous (i.v.) glucocorticosteroids (GCs) constitute the first-line treatment for active and moderate-to-severe Graves' orbitopathy (GO). In cases of persistent disease, rituximab, a monoclonal anti-CD20 antibody, may be used, although studies have yielded conflicting results. In case 1, a 50-year-old female heavy smoker presented with severe bilateral disfiguring eyelid edema of four months, bilateral exophthalmos and a clinical activity score (CAS) of 5/7. Laboratory investigation showed thyrotoxicosis and high thyroid-stimulating immunoglobulin (TSI) levels [32 IU/L (normal <1...
June 22, 2018: Endocrine Journal
Felix Ck Wong, Elaine Yl Au, Ricky Wk Ip, Ho Chung Yau, Lydia Cw Lit
No abstract text is available yet for this article.
June 21, 2018: Endocrine Journal
Guo-Hua Wang, Jun Jin, Li-Zhou Sun
This paper aims to investigate the influence of lipoprotein-associated phospholipase A2 (Lp-PLA2) inhibitor, darapladib, on insulin resistance (IR) in streptozotocin (STZ)-induced diabetic pregnant rats. The rat models were divided into Control (normal pregnancy), STZ + saline (STZ-induced diabetic pregnant rats), STZ + Low-dose and STZ + High-dose darapladib (STZ-induced diabetic pregnant rats treated with low-/high-dose darapladib) groups. Pathological changes were observed by Hematoxylin-eosin (HE) and Immunohistochemistry staining...
June 21, 2018: Endocrine Journal
Daisuke Tamada, Tetsuhiro Kitamura, Mitsuyoshi Takahara, Toshihisa Tanaka, Masatoshi Takeda, Michio Otsuki, Iichiro Shimomura
Circadian variations impact thyrotropin (TSH) secretion; in Cushing's syndrome (CS) patients, the nocturnal serum TSH surge is abolished. The aim of this prospective study is to examine whether serum TSH surge may be a useful diagnostic method for CS. This prospective study recruited 136 inpatients for differential diagnosis of CS or subclinical CS (SCS), and 21 inpatients with depression at Osaka University Hospital. Serum TSH surge was assessed by the midnight-to-morning serum TSH ratio (2300-2400 h to 0800-0900 h)...
June 19, 2018: Endocrine Journal
Qingtao Yang, Kusheng Wu, Yiyi Zhuang, Haoqiang Wu, Liang Lu, Wencai Li, Zhenjie Li, Xuxia Sui
Several articles have shown the inverse association between total testosterone (TT) or sex hormone-binding globulin (SHBG) and hepatic steatosis. No articles report associations of TT, SHBG, free testosterone (FT), and bioavailable testosterone (BioT) with aspartate aminotransferase (AST)/alanine aminotransferase (ALT) ratios. Therefore, we investigated the associations of TT, FT, BioT and SHBG with hepatic steatosis and AST/ALT ratios. A total of 218 men were enrolled. We diagnosed hepatic steatosis by ultrasound...
June 16, 2018: Endocrine Journal
Nobuyuki Kobayashi, Mitsuo Yamaguchi-Okada, Kentaro Horiguchi, Noriaki Fukuhara, Hiroshi Nishioka, Shozo Yamada
Growth hormone deficiency (GHD) is an endocrine disorder characterized by insufficient production of growth hormone (GH). Non-functioning pituitary adenoma (NFPA) is one of common causes of GHD. Although most patients with NFPA have transsphenoidal surgery, the time-dependent changes in GH after operation have yet to be investigated. In this study, we analyzed patients with NFPAs that underwent transsphenoidal surgery. Postoperatively, GH secretion was evaluated in response to GH-releasing peptide-2 (GHRP2) infusion...
June 15, 2018: Endocrine Journal
Yi-Chun Lin, Chih-Hsien Chiu, Hung-Chang Liu, Jyun-Yuan Wang
Although curcumin was widely applied as a functional food for different diseases, it was found to reduce serum testosterone level and fertility in male animals by unknown molecular mechanisms. Here in our study, we investigated the possible mechanisms of curcumin-suppressed testosterone production in Leydig cells. Our enzyme immunoassay results showed that curcumin cell-autonomously suppressed ovine luteinizing hormone-stimulated testosterone production in primary Leydig cells and 8-bromo-cyclic adenosine monophosphate (8-br-cAMP)-induced progesterone production in MA-10 cells...
June 9, 2018: Endocrine Journal
Qingyan Lu, Xuan Luo, Chaoming Mao, Tingting Zheng, Baocui Liu, Xin Dong, Yuepeng Zhou, Chengcheng Xu, Xiao Mou, Fei Wu, Ling Bu, Guoyue Yuan
Hashimoto's thyroiditis (HT) is considered a T helper-type 1 (Th1) cytokine-dominant autoimmune thyroid disease. Caveolin-1 (Cav-1), a part of the thyroxisome multiprotein complex, is localized at the apical pole of thyrocytes and is indispensable for synthesis of thyroid hormones and modulation of oxidative stress in order to avoid cell damage and apoptosis. Reduced autophagy induces thyroid follicular cells (TFC) apoptosis by activating reactive oxygen species (ROS) in HT patients. Nevertheless, whether Cav-1 has roles in the regulation of autophagy remains largely unclear...
June 6, 2018: Endocrine Journal
Anna Babinska, Mariusz Kaszubowski, Krzysztof Sworczak
Due to the fact that overweight or obesity is accompanied by hormonally active adrenal tumors: Cushing Syndrome-(CS) and Subclinical Cushing Syndrome (SCS), it is of high interest the correlation between different adipokines and cytokines secreted by adipose tissue, with metabolic disorders and hormonal activity in this group. Even in non-functioning adrenal incidentalomas (NFAI) elevated risk for cardiovascular disease and metabolic syndrome was demonstrated. The aim of the study was to investigate plasma adiponectin, leptin, resistin, tumor necrosis factor α (TNFα), interleukin 6 (IL6) and monocyte chemoattractant protein 1 (MCP1) levels in patients with NFAIs and healthy subjects...
June 5, 2018: Endocrine Journal
Naoki Omori, Mikio Watanabe, Naoya Inoue, Junpei Taniguchi, Yoh Hidaka, Yoshinori Iwatani
The prognosis of autoimmune thyroid disease (AITD) is difficult to predict. Th2 cells suppress the differentiation of Th1 and Th17 cells, which are associated with the prognosis of AITD. However, there are few reports as to whether Th2 chemotaxis-related genes, such as CRTH2 (chemoattractant receptor-homologous molecule expressed on Th2 cells), IL-25, TARC/CCL17 (Thymus and activation regulated chemokine/chemokine ligand 17) or STAT6 (Signal transducer and activator of transcription 6), affect the pathology of and/or susceptibility to AITD...
May 30, 2018: Endocrine Journal
Atsunori Kashiwagi, Taishi Sakatani, Ichiro Nakamura, Noriko Akiyama, Kenichi Kazuta, Eiji Ueyama, Hideyuki Takahashi, Yoshinori Kosakai
To examine differential improvements among cardiovascular risk factors in response to treatment with ipragliflozin in Japanese type 2 diabetes mellitus (T2DM) patients, we conducted a pooled analysis of six randomized, double-blind trials of Japanese T2DM patients who received ipragliflozin 50 mg/day or placebo and had patient-level data for cardiometabolic risk parameters. Risk factors included glycated hemoglobin (HbA1c), body weight, homeostatic model assessment for insulin resistance and beta-cell function (HOMA-R and HOMA-beta, respectively), systolic blood pressure, fasting serum insulin concentrations, and the concentration of uric acid, lipids, and liver enzymes from baseline to end of treatment (EOT; 12-24 weeks)...
May 29, 2018: Endocrine Journal
Takashi Nomiyama, Dai Shimono, Tsuyoshi Horikawa, Yuki Fujimura, Tomohiro Ohsako, Yuichi Terawaki, Takashi Fukuda, Ryoko Motonaga, Makito Tanabe, Toshihiko Yanase
Sodium-glucose co-transporter-2 inhibitors are newly established anti-diabetic agents with a unique glucose-lowering mechanism. In the present study, we investigated the efficacy and safety of the sodium-glucose co-transporter-2 inhibitor ipragliflozin (Ipra) for metabolic markers and cardiovascular parameters in Japanese patients with type 2 diabetes mellitus (T2DM). This study was an investigator-initiated, open-label, single-arm, multicenter prospective study. Patients with T2DM were treated with 50 mg Ipra for 24 and 52 weeks...
May 26, 2018: Endocrine Journal
Maria Tomkins, Federica Cavalcoli, Emma Stanley, Killian O'Rourke, Sean Murphy, Timothy Lynch, Gianluca Tamagno
Encephalopathy associated with autoimmune thyroid disease (EAATD), also known as Hashimoto's encephalopathy, is a rare neurological condition that may occur in patients with clinical or sub-clinical autoimmune thyroid disease. The pathogenesis of EAATD has been not clearly elucidated yet. The diagnostic criteria include neurological or psychiatric symptoms, high levels of anti-thyroid antibodies, and exclusion of other possible causes of encephalopathy. In the large majority of cases, EAATD patients respond to immunosuppressant therapies, in particular to corticosteroids...
May 25, 2018: Endocrine Journal
Tetsuya Takamizawa, Tetsurou Satoh, Tomoko Miyamoto, Yasuyo Nakajima, Takahiro Ishizuka, Takuya Tomaru, Satoshi Yoshino, Akiko Katano-Toki, Ayaka Nishikido, Santosh Sapkota, Takuya Watanabe, Takashi Okamura, Emi Ishida, Kazuhiko Horiguchi, Syunichi Matsumoto, Sumiyasu Ishii, Atsushi Ozawa, Nobuyuki Shibusawa, Shuichi Okada, Masanobu Yamada
Mutations in TBL1X, a component of the nuclear receptor co-repressor (N-CoR) and silencing mediator of retinoic acid and thyroid hormone receptor co-repressor complexes, have recently been implicated in isolated central hypothyroidism (CeH). However, the mechanisms by which TBL1X mutations affect negative feedback regulation in the hypothalamus-pituitary-thyroid axis remain unclear. N-CoR was previously reported to paradoxically enhance the ligand-independent stimulation of TRH and TSHβ gene promoters by thyroid hormone receptors (TR) in cell culture systems...
May 23, 2018: Endocrine Journal
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