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Journal of Molecular Endocrinology

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https://www.readbyqxmd.com/read/29440314/the-steroid-sulfate-axis-and-its-relationship-to-maternal-behavior-and-mental-health
#1
William Davies
Steroid hormones can exist in functionally-dissociable sulfated and non-sulfated (free) forms and can exert profound effects on numerous aspects of mammalian physiology; the ratio of free to sulfated steroids is governed by the antagonistic actions of steroid sulfatase (STS) and sulfotransferase (SULT) enzymes. Here, I examine evidence from human and animal model studies which suggests that STS and its major substrate (dehydroepiandrosterone sulfate, DHEAS) and product (DHEA) can influence brain function, behavior and mental health, before summarising how the activity of this axis varies throughout mammalian pregnancy and the postpartum period...
February 13, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29438976/role-of-upstream-stimulatory-factor-2-in-glutamate-dehydrogenase-gene-transcription
#2
Carlos Gaspar, Jonás I Silva-Marrero, María C Salgado, Isabel V Baanante, Isidoro Metón
Glutamate dehydrogenase (Gdh) plays a central role in ammonia detoxification by catalysing reversible oxidative deamination of L-glutamate into α-ketoglutarate using NAD+ or NADP+ as cofactor. To gain insight into transcriptional regulation of glud, the gene that codes for Gdh, we isolated and characterised the 5' flanking region of glud from gilthead sea bream (Sparus aurata). In addition, tissue distribution, the effect of starvation as well as short- and long-term refeeding on Gdh mRNA levels in the liver of S...
February 8, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29437882/decidual-regulation-of-trophoblast-is-altered-in-pregnancies-at-risk-of-pre-eclampsia
#3
Laura B James-Allan, Guy StJ Whitley, Karin Leslie, Alison E Wallace, Judith E Cartwright
Successful implantation and placentation are dependent on the interaction between decidual stromal cells (DSC) and extravillous trophoblast (EVT) cells. The extent of trophoblast invasion relies on communication between the placenta and maternal decidua. The cyclical process of decidualisation induces a transformation of endometrial fibroblasts to secretory DSC; these secreted products have many functions including the control of trophoblast invasion. Inadequate trophoblast invasion and remodelling of the uterine vessels (the spiral arteries) are associated with pregnancy disorders such as pre-eclampsia...
February 7, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29437881/curcumin-exerts-a-protective-effect-against-premature-ovarian-failure-in-mice
#4
Zhengjie Yan, Youjin Dai, Heling Fu, Yuan Zheng, Dan Bao, Yuan Yin, Qin Chen, Xiaowei Nie, Qingting Hao, Daorong Hou, Yugui Cui
This study was designed to investigate the protective effect of curcumin against D-galactose (D-gal)-induced premature ovarian failure (POF) in mice. A mouse POF model was induced by subcutaneous injection of D-gal (200 mg.kg-1.d-1) daily for 42 days. Mice in the curcumin group received both D-gal treatment and intraperitoneal injection of curcumin (100 mg.kg-1.d-1) for 42 days. Ovarian function, oxidative stress and apoptosis were evaluated. The P, E2 and SOD levels were higher, and the FSH, LH and MDA levels were significantly lower in the curcumin group than in the D-gal group...
February 7, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29437880/molecular-regulation-of-follicle-stimulating-hormone-synthesis-secretion-and-action
#5
Nandana Das, Rajendra Kumar
Follicle-stimulating hormone (FSH) plays fundamental roles in male and female fertility. FSH is a heterodimeric glycoprotein expressed by gonadotrophs in the anterior pituitary. The hormone-specific FSH-subunit is non-covalently associated with the common -subunit that is also present in the luteinizing hormone (LH), another gonadotrophic hormone secreted by gonadotropes and thyroid-stimulating hormone (TSH) secreted by thyrotrophs. Several decades of research led to the purification, structural characterization and physiological regulation of FSH in a variety of species including humans...
February 7, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29434028/effects-of-thyroid-hormones-on-thermogenesis-and-energy-partitioning
#6
Karl Alexander Iwen, Rebecca Ölkrug, Georg Brabant
Thyroid hormones (TH) are of central importance for thermogenesis, energy homeostasis, and metabolism. Here we will discuss these aspects by focussing on the physiological aspects of TH-dependent regulation in response to cold exposure and fasting which will be compared to alterations in primary hyper- and hypothyroidism. In particular, we will summarise current knowledge on regional thyroid hormone status in the central nervous system (CNS) and in peripheral cells. In contrast to hyper- and hypothyroidism, where parallel changes are observed, local alterations in the CNS differ to peripheral compartments when induced by cold exposure or fasting...
February 6, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29378772/circadian-rhythms-in-mitochondrial-respiration
#7
Paul de Goede, Jakob Wefers, Eline Constance Brombacher, P Schrauwen, Andries Kalsbeek
Many physiological processes are regulated with a 24h periodicity to anticipate the environmental changes of day to nighttime and vice versa. These 24h regulations, commonly termed circadian rhythms, amongst others control the sleep-wake cycle, locomotor activity and preparation for food availability during the active phase (daytime for humans, nighttime for nocturnal animals). Disturbing circadian rhythms at the organ or whole-body level by social jetlag or shift work, increases the risk to develop chronic metabolic diseases such as type 2 diabetes mellitus...
January 29, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29378771/anti-insulin-like-growth-factor-therapy-in-breast-cancer
#8
Douglas Yee
Early preclinical and population data suggested a role for the type I insulin-like growth factor receptor (IGF-1R) in the regulation of breast cancer growth and survival. To target this pathway, multiple monoclonal antibodies and tyrosine kinase inhibitors were developed and tested in clinical trials. While some of the early clinical trials suggested a benefit for these drugs, none of the attempts showed improved outcomes when compared to conventional therapy. This failure of the IGF-1R inhibitors was pronounced in breast cancer; multiple trials testing IGF-1R inhibition in estrogen receptor positive breast cancer were conducted, none showed benefit...
January 29, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29348304/mir-20a-5p-promotes-adipogenic-differentiation-via-targeting-kruppel-like-factor-3
#9
Endong Zhu, Juanjuan Zhang, Jie Zhou, Hairui Yuan, Wei Zhao, Baoli Wang
miR-20a-5p has recently been identified to induce adipogenesis of established adipogenic cell lines in our previous study. However, its role and molecular mechanisms in the regulation of adipocyte lineage commitment of bone marrow derived stromal cells (BMSCs) still need to be explored. In this report, we demonstrated the expression of miR-20a-5p was promoted gradually during adipogenic differentiation in BMSCs. We also confirmed that miR-20a-5p have a positive function in the adipogenic differentiation of BMSCs by gain-of-function study with overexpression lentivirus or synthetic mimics of miR-20a-5p, and loss-of-function study with sponge lentivirus or synthetic inhibitor of miR-20a-5p...
January 18, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29339400/intact-glucose-uptake-despite-deteriorating-signaling-in-adipocytes-with-high-fat-feeding
#10
Björn Hansson, Sebastian Wasserstrom, Björn Moren, Vipul Periwal, Petter Vikman, Sam Cushman, Olga Göransson, Petter Storm, Karin Stenkula
To capture immediate cellular changes during diet-induced expansion of adipocyte cell volume and number, we characterized mature adipocytes during a short-term high-fat diet (HFD) intervention. Male C57BL6/J mice were fed chow diet, and then switched to HFD for 2, 4, 6 or 14 days. Systemic glucose clearance was assessed by glucose tolerance test. Adipose tissue was dissected for RNA-seq and cell size distribution analysis using coulter counting. Insulin response in isolated adipocytes was monitored by glucose uptake assay and western blotting, and confocal microscopy was used to assess autophagic activity...
January 16, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29339399/ovariectomy-induced-bone-loss-in-tnf%C3%AE-and-il6-knockout-mice-is-regulated-by-different-mechanisms
#11
Siyi Zhu, Hongchen He, Chengfei Gao, Guojing Luo, Ying Xie, Haiming Wang, Li Tian, Chen Xiang, Yu Xijie, Chengqi He
Female wild-type (WT), TNFα knockout (TNFα-/-) or IL6 knockout (IL6-/-) mice aged 12 weeks were sham-operated (SHAM) or subjected to OVX and euthanized after 4 weeks. Bone mass and skeletal microarchitecture were determined using micro-CT. Bone marrow stromal cells (BMSCs) from all three groups were induced to differentiate into osteoblasts or osteoclasts. Bone metabolism was assessed by histological analysis and qRT-PCR. OVX significantly increased the body weight only in WT mice and decreased the uterine weight in all three genotypes...
January 16, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29330151/interleukin-22-reverses-human-islet-dysfunction-and-apoptosis-triggered-by-hyperglycemia-and-light
#12
Shadab Abadpour, Bente Halvorsen, Afaf Sahraoui, Olle Korsgren, Pål Aukrust, Hanne Scholz
Interleukin (IL)-22 has recently been suggested as an anti-inflammatory cytokine that could protect the islet cells from inflammation- and glucose-induced toxicity. We have previously shown that the tumor necrosis factor family member, LIGHT can impair human islet function at least partly via pro-apoptotic effects. Herein, we aimed to investigate the protective role of IL-22 on human islets exposed to the combination of hyperglycemia and LIGHT. First, we found up-regulation of LIGHT receptors (LTβR and HVEM) in engrafted human islets exposed to hyperglycemia (>11 mM) for 17 days post transplantation by using a double islet transplantation mouse model as well as in human islets cultured with high glucose (HG) (20mM glucose) + LIGHT in vitro and this latter effect was attenuated by IL-22...
January 12, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29330150/dysfunctional-signaling-underlying-endometriosis-current-state-of-knowledge
#13
Yeon Jean Cho, Seung Hyun Lee, Jung Woo Park, Myoungseok Han, Mi Jin Park, Sang Jun Han
Endometriosis is defined as the presence of endometrial tissue outside the uterine cavity. It affects approximately 5-10% of women of reproductive age. Endometriosis is associated with dysmenorrhea, dyspareunia and, often, severe pelvic pain. In addition to pain, women with endometriosis often experience infertility. Defining the molecular etiology of endometriosis is a significant challenge for improving the quality of women's lives. Unfortunately, the pathophysiology of endometriosis is not well understood...
January 12, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29330149/voluntary-exercise-and-depression-like-behavior-in-rodents-are-we-running-in-the-right-direction
#14
Joram D Mul
Acute or chronic exposure to stress can increase the risk to develop major depressive disorder, a severe, recurrent and common psychiatric condition. Depression places an enormous social and financial burden on modern society. Although many depressed patients are treated with antidepressants, their efficacy is only modest, underscoring the necessity to develop clinically-effective pharmaceutical or behavioral treatments. Exercise training produces beneficial effects on stress-related mental disorders, indicative of clinical potential...
January 12, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29298811/sources-and-biological-activities-of-marine-sulfated-steroids
#15
Francisca Carvalhal, Marta Correia-da-Silva, Maria Emília Sousa, Madalena Pinto, Anake Kijjoa
Marine environment is rich in structurally unique molecules and can be an inspiring source of novel drugs. Currently, six marine-derived drugs are in the market with FDA approval and several more are in the clinical pipeline. Structurally-diverse and complex secondary metabolites have been isolated from the marine world and these include sulfated steroids. Biological activities of nearly 150 marine sulfated steroids reported from 1978 to 2017 are compiled and described, namely antimicrobial, antitumor, cardiovascular, and antifouling activities...
January 3, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29273685/igf-i-receptor-and-thyroid-associated-ophthalmopathy
#16
Michelle Mohyi, Terry J Smith
Thyroid-associated ophthalmopathy (TAO) is a vexing and poorly understood autoimmune process involving the upper face and tissues surrounding the eyes. In TAO, the orbit can become inflamed and undergo substantial remodeling that is disfiguring and can lead to loss of vision. These are currently no approved medical therapies for TAO, the consequence of its uncertain pathogenic nature. It usually presents as a component of the syndrome known as Graves' disease where loss of immune tolerance to the thyrotropin receptor (TSHR) results in the generation of activating antibodies against that protein and hyperthyroidism...
December 22, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29273684/sp600125-suppresses-keap1-expression-and-results-in-nrf2-mediated-prevention-of-diabetic-nephropathy
#17
Huan Zhang, Xiuxia Liu, Shanshan Zhou, Ye Jia, Ying Li, Yuguo Song, Junnan Wang, Hao Wu
c-Jun N-terminal kinase (JNK) contributes to the pathogenesis of diabetic nephropathy (DN). The JNK inhibitor SP600125 was reported to ameliorate DN. However, the mechanism remained unclear. We previously reported that SP600125 activated nuclear factor erythroid 2-related factor 2 (NRF2), a governor of the cellular antioxidant defense system, in the aortas of the diabetic mice. Given the critical role of NRF2 in preventing DN, the present study aimed to test whether or not NRF2 is required for SP600125's protection against DN...
December 22, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29273683/functional-implications-of-corticosteroid-binding-globulin-n-glycosylation
#18
Marc Simard, Caroline Underhill, Geoffrey L Hammond
Corticosteroid-binding globulin (CBG) is a plasma carrier of glucocorticoids. Human and rat CBGs have six N-glycosylation sites. Glycosylation of human CBG influences its steroid-binding activity and there are N-glycosylation sites in the reactive center loops (RCLs) of human and rat CBGs. Proteolysis of the RCL of human CBG causes a structural change that disrupts steroid binding. We now show that mutations of conserved N-glycosylation sites at N238 in human CBG and N230 in rat CBG disrupt steroid binding...
December 22, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29273682/down-regulation-of-decidual-sp1-and-p300-is-associated-with-severe-preeclampsia
#19
Yachao Zhang, Jieqiong Yang, Shi-Jian Lv, Dong-Qin Zhao, Zi-Jiang Chen, Weiping Li, Cong Zhang
Preeclampsia is a pregnancy-induced disorder characterized by hypertension and proteinuria after 20 weeks of gestation, affecting 5-7% of pregnancies worldwide. So far, the etiology of PE remains poorly understood. Abnormal decidualization is thought to contribute to the development of preeclampsia. SP1 belongs to the Sp/KLF super family and can recruit P300 to regulate transcription of several genes. SP1 is also very important for decidualization as it enhances the expression of tissue factor. In this study, we investigated the expression of SP1 and P300 in deciduae and their relationship with PE...
December 22, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29273681/sorcin-is-involved-during-embryo-implantation-via-activating-vegf-pi3k-akt-pathway-in-mice
#20
Kanchan Gupta, Vijay Kumar Sirohi, Suparna Kumari, Vinay Shukla, Murli Manohar, Pooja Popli, Anila Dwivedi
Earlier studies have demonstrated the cyclic variation and also the altered expression of sorcin in endometrium during early- to mid-secretory phase transition in women with unexplained infertility. The current study was undertaken to establish the functional role of sorcin in endometrial receptivity in mice. Results indicated that sorcin was highly expressed during the window of implantation in mice and functional blockage of sorcin caused significant reduction in number of implanted blastocyst. The receptivity markers (i...
December 22, 2017: Journal of Molecular Endocrinology
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