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Sex Steroids and proteomics

Emilia Amengual-Cladera, Gabriela Capllonch-Amer, Isabel Lladó, Magdalena Gianotti, Ana M Proenza
Taking into account the sexual dimorphism previously found in white adipose tissue (WAT) regarding mitochondrial function and biogenesis, as well as insulin sensitivity, the aim of this study was to go further into the role of sex hormones in this dimorphism. To achieve this objective, we used ovariectomized rats and performed a screening by means of proteomic analyses of the periovarian WAT, combined with a study of the protein levels of specific factors involved in mitochondrial function. Rats were ovariectomized at 5 weeks of age and subcutaneously injected every 48 h with corn-oil (OVX group) or with 17β-estradiol (E2, 10 μg/kg body mass; OVX + E2 group) for 4 weeks prior to sacrifice...
April 2016: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
Anni P Vehmas, Marion Adam, Teemu D Laajala, Gabi Kastenmüller, Cornelia Prehn, Jan Rozman, Claes Ohlsson, Helmut Fuchs, Martin Hrabě de Angelis, Valérie Gailus-Durner, Laura L Elo, Tero Aittokallio, Jerzy Adamski, Garry Corthals, Matti Poutanen, Leena Strauss
Estrogens are suggested to lower the risk of developing metabolic syndrome in both sexes. In this study, we investigated how the increased circulating estrogen-to-androgen ratio (E/A) alters liver lipid metabolism in males. The cytochrome P450 aromatase (P450arom) is an enzyme converting androgens to estrogens. Male mice overexpressing human aromatase enzyme (AROM+ mice), and thus have high circulating E/A, were used as a model in this study. Proteomics and gene expression analyses indicated an increase in the peroxisomal β-oxidation in the liver of AROM+ mice as compared with their wild type littermates...
February 5, 2016: Journal of Proteomics
Beata Lontay, Khaldon Bodoor, Adrienn Sipos, Douglas H Weitzel, David Loiselle, Rachid Safi, Donghai Zheng, James Devente, Robert C Hickner, Donald P McDonnell, Thomas Ribar, Timothy A Haystead
Pregnancy promotes physiological adaptations throughout the body, mediated by the female sex hormones progesterone and estrogen. Changes in the metabolic properties of skeletal muscle enable the female body to cope with the physiological challenges of pregnancy and may also be linked to the development of insulin resistance. We conducted global microarray, proteomic, and metabolic analyses to study the role of the progesterone receptor and its transcriptional regulator, smoothelin-like protein 1 (SMTNL1) in the adaptation of skeletal muscle to pregnancy...
July 17, 2015: Journal of Biological Chemistry
Sang Woo Kim, Jung-Won Choi, Dong Seok Lee, Jong Won Yun
BACKGROUND: To date, there are limited studies on the sex-specific relationship between fetuins (Ft-A and Ft-B) and metabolic diseases. Our recent proteomic study has shown that fetuins may play sex-dependent roles in obesity and diabetes. In the present study, we investigated the expression of hepatic fetuins with respect to the effects of sex hormones both in vivo and in vitro. METHODS & RESULTS: A sex hormone-treated rat model was established in order to study the effects of sex hormones on hepatic fetuin expression...
2014: Cellular Physiology and Biochemistry
Günther K H Zupanc, Iulian Ilies, Ruxandra F Sîrbulescu, Marianne M Zupanc
Sexually dimorphic behaviors develop under the influence of sex steroids, which induce reversible changes in the underlying neural network of the brain. However, little is known about the proteins that mediate these activational effects of sex steroids. Here, we used a proteomics approach for large-scale identification of proteins involved in the development of a sexually dimorphic behavior, the electric organ discharge of brown ghost knifefish, Apteronotus leptorhynchus. In this weakly electric fish, the discharge frequency is controlled by the medullary pacemaker nucleus and is higher in males than in females...
April 2014: Journal of Neurophysiology
Michael D Leise, John J Poterucha, Jayant A Talwalkar
Drug hepatoxicity can be nonidiosyncratic (predictable), as in the case of acetaminophen, or idiosyncratic (unpredictable). This review article focuses primarily on idiosyncratic drug-induced liver injury (DILI). New epidemiologic data suggest that approximately 20 new cases of DILI per 100,000 persons occur each year. Idiosyncratic DILI accounts for 11% of the cases of acute liver failure in the United States. Risk factors for DILI include medication dose, drug lipophilicity, and extent of hepatic metabolism...
January 2014: Mayo Clinic Proceedings
Zeynep Sumer-Bayraktar, Terry Nguyen-Khuong, Roxana Jayo, David D Y Chen, Sinan Ali, Nicolle H Packer, Morten Thaysen-Andersen
Human sex hormone binding globulin (hSHBG) is a serum glycoprotein central to the transport and targeted delivery of sex hormones to steroid-sensitive tissues. Several molecular mechanisms of action of hSHBG, including the function of its attached glycans remain unknown. Here, we perform a detailed site-specific characterization of the N- and O-linked glycosylation of serum-derived hSHBG. MS-driven glycoproteomics and glycomics combined with exoglycosidase treatment were used in a bottom-up and top-down manner to determine glycosylation sites, site-specific occupancies and monosaccharide compositions, detailed glycan structures, and the higher level arrangement of glycans on intact hSHBG...
November 2012: Proteomics
Marie Bourin, Joël Gautron, Magali Berges, Christelle Hennequet-Antier, Cédric Cabau, Yves Nys, Sophie Réhault-Godbert
BACKGROUND: Most egg yolk precursors are synthesized by the liver, secreted into the blood and transferred into oocytes, to provide nutrients and bioactive molecules for the avian embryo. Three hundred and sixteen distinct proteins have been identified in egg yolk. These include 37 proteases and antiproteases, which are likely to play a role in the formation of the yolk (vitellogenesis), as regulators of protein metabolism. We used a transcriptomic approach to define the protease and antiprotease genes specifically expressed in the hen liver in relation to vitellogenesis by comparing sexually mature and pre-laying chickens showing different steroid milieu...
2012: BMC Genomics
Ho-Sun Lee, Myoung-Yun Pyo, Mihi Yang
BACKGROUND: Bisphenol A (BPA), an endocrine disrupting chemical, has been suspected to pose carcinogenic risks. However, likely mechanisms are obscure and there are difficulties to estimating its real significance for cancer development. METHODS: We therefore studied BPA-induced proteomic alterations in immune organs of ICR mice offspring that were prenatally exposed to BPA (15 and 300 mg/L of drinking water). We performed 2D-gel analyses of samples, considering differences in spleen, exposure levels, sex, and ages...
2012: Asian Pacific Journal of Cancer Prevention: APJCP
Fabio Di Domenico, Gabriella Casalena, Jia Jia, Rukhsana Sultana, Eugenio Barone, Jian Cai, William M Pierce, Chiara Cini, Cesare Mancuso, Marzia Perluigi, Catherine M Davis, Nabil J Alkayed, D Allan Butterfield, Allan D Butterfield
Signal transduction and activator of transcription-3 (STAT3) plays an important role in neuronal survival, regeneration and repair after brain injury. We previously demonstrated that STAT3 is activated in brain after cerebral ischemia specifically in neurons. The effect was sex-specific and modulated by sex steroids, with higher activation in females than males. In the current study, we used a proteomics approach to identify downstream proteins affected by ischemia in male and female wild-type (WT) and neuron-specific STAT3 knockout (KO) mice...
May 2012: Journal of Neurochemistry
Guoqiang Chen, Yanmin Wang, Ling Qiu, Xuzhen Qin, Hui Liu, Xiaodong Wang, Yanying Wang, Gaoguang Song, Fang Li, Yumei Guo, Fenjie Li, Shuai Guo, Zhili Li
IgG functions rely on interactions of the Fc region with other proteins, which are optimized by tailoring of a conserved N-linked glycosylation at Asn-297. We conducted a study involving 735 control individuals and 138 thyroid cancer patients. Here we demonstrated that previously described age-related change in Fc-glycosylation was further characterized by definite sex specificity. In females, the incidences of most of glycosylated forms began to pose characteristic changes at ages of puberty or menopause. In addition, glycan-glycan relationships existed extensively within Fc glycosylation, which were characterized to be altered upon different states of subjects, such as age, sex and thyroid cancer...
June 6, 2012: Journal of Proteomics
Katya B Rubinow, Chongren Tang, Andrew N Hoofnagle, Christin N Snyder, John K Amory, Jay W Heinecke, Stephanie T Page
Exogenous androgens can lower HDL-cholesterol (HDL-C) concentrations, yet men with low serum testosterone have elevated rates of cardiovascular disease (CVD). HDL function may better predict CVD risk than absolute HDL-C quantity. We evaluated the acute effects of medical castration in men on HDL-C, cholesterol efflux capacity and HDL protein composition. Twenty-one healthy men, ages 18-55, received the GnRH antagonist acyline and one of the following for 28days: Group 1: placebo, Group 2: transdermal testosterone gel and placebo, Group 3: transdermal testosterone gel and an aromatase inhibitor...
April 2012: Steroids
Adam D Biales, David C Bencic, Daniel L Villeneuve, Gerald T Ankley, David L Lattier
The hypothalamus-pituitary-gonadal (HPG) axis plays a central role in the maintenance of homeostasis and disruptions in its function can have important implications for reproduction and other critical biological processes. A number of compounds found in aquatic environments are known to affect the HPG axis. In the present study, we used two-dimensional electrophoresis to investigate the proteome of female and male zebrafish brain after 96 h exposure to the fungicide prochloraz. Prochloraz has known effects on a number of key HPG molecules, including antagonism of Cyp17 and Cyp19 (aromatase)...
October 2011: Aquatic Toxicology
Fugui Chen, Sheng Zhang, Hao Jiang, Wujun Ma, Helena Korpelainen, Chunyang Li
Male and female poplar ( Populus cathayana Rehd.) cuttings respond differently to salinity stress. To understand these differences better, comparative morphological, physiological, and proteomics analyses were performed. Treatments with different concentrations of NaCl applied to male and female poplar cuttings for 4 weeks showed that females reacted more negatively at the morphological and physiological levels than did males, visible as shriveled leaves, decreased growth, lowered photosynthetic capacities, and greater Na(+) accumulation...
September 2, 2011: Journal of Proteome Research
Annalisa Castagna, Oliviero Olivieri, Alberto Milli, Miriam Dal Bosco, Anna Maria Timperio, Lello Zolla, Muthukumar Gunasekaran, Ricciarda Raffaelli, Francesca Pizzolo, Daniela Cecconi
PURPOSE: In the frame of a research study on possible urinary markers related to physiological hormones cycle, 33 volunteer, healthy, normotensive fertile women were selected. Clinical parameters and renin-angiotensin-aldosterone system (RAAS) components were also investigated, on the basis of the well-known relation linking sex female hormones and renin and aldosterone levels. EXPERIMENTAL DESIGN: A classic proteomic approach was applied to investigate urinary protein changes at different stages of menstrual cycle, specifically mid-cycle phase (G1), luteal phase (G2) and after 2 months of contraceptive therapy (G3)...
June 2011: Proteomics. Clinical Applications
Claudia D'Anna, Caterina Cascio, Diego Cigna, Giacoma Galizzi, Irene Deidda, Laura Bianchi, Domenica Russo, Rosa Passantino, Luca Bini, Patrizia Guarneri
Sex steroids influence the structural and functional organization of ocular tissues, promote survival in several pathological conditions including retinal neurodegeneration and have a prominent role in age-related eye diseases as well as neurodegenerative diseases. However, their underlying mechanisms are still elusive. We explored proteomic profiling of rat retinas following intravitreal injection of the bioactive 17β-estradiol or androgen dihydrotestosterone. Using narrow range 2-DE gels and MALDI-TOF-MS analysis, we identified three sex steroid-regulated proteins: the galectin-related-inter-fiber (GRIFIN) which is a galectin family member protein of unknown function, the fatty acid-binding protein epidermal-5 (FABP5) protein responsible for the fatty acid uptake and transport and the small heat shock αA-crystallin (CRYAA) protein involved in preventing aggregation of denatured or unfolded proteins...
March 2011: Proteomics
Reza Rahbari, Lisa Zhang, Electron Kebebew
Cancer gender disparity in incidence, disease aggressiveness and prognosis has been observed in a variety of cancers. Thyroid cancer is one of the fastest growing cancer diagnoses worldwide. It is 2.9-times more common in women than men. The less aggressive histologic subtypes of thyroid cancer are more common in women, whereas the more aggressive histologic subtypes have similar gender distribution. The gender disparity in incidence, aggressiveness and prognosis is well established for thyroid cancer but the cause of the disparity is poorly understood...
November 2010: Future Oncology
Mahnaz Razandi, Ali Pedram, Ellis R Levin
Classical sex steroid receptors (SRs) localize at the plasma membranes (PMs) of cells, initiating signal transduction through kinase cascades that contribute to steroid hormone action. Palmitoylation of the SRs is required for membrane localization and function, but the proteins that facilitate this modification and subsequent receptor trafficking are unknown. Initially using a proteomic approach, we identified that heat shock protein 27 (Hsp27) binds to a motif in estrogen receptor alpha (ERalpha) and promotes palmitoylation of the SR...
July 2010: Molecular and Cellular Biology
Elizabeth Yohannes, Jinsook Chang, Moses T Tar, Kelvin P Davies, Mark R Chance
Protein expression profiles in rat corporal smooth muscle tissue were compared between animal models of streptozotocin-induced diabetes mellitus (STZ-DM) and age-matched controls (AMCs) at 1 week and 2 months after induction of hyperglycemia with STZ treatment. At each time point, protein samples from four STZ-DM and four AMC rat corpora tissues were prepared independently and analyzed together across multiple quantitative two-dimensional gels using a pooled internal standard sample to quantify expression changes with statistical confidence...
March 2010: Molecular & Cellular Proteomics: MCP
Dobroslav Kyurkchiev, Ekaterina Ivanova-Todorova, Soren Hayrabedyan, Iskra Altankova, Stanimir Kyurkchiev
PROBLEM: Monocyte-derived dendritic cells (mDCs) are present in human decidua during the first month of pregnancy where they experience the effect of the increased concentration of progesterone (Pg) and estradiol (Estr). The aim of our study was to assess the effect of these reproductive hormones on the immunomodulatory role of mDCs. METHODS OF STUDY: The mDCs cultured in vitro in the presence of sex steroid hormones and characterized for their apoptosis and secretion of cytokines by flow cytometry, enzyme linked immunosorbent assay and proteome profiler kit...
November 2007: American Journal of Reproductive Immunology: AJRI
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