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Estrogen sulfotransferase

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https://www.readbyqxmd.com/read/29772265/administration-of-low-dose-triclosan-to-pregnant-ewes-results-in-placental-uptake-and-reduced-estradiol-sulfotransferase-activity-in-fetal-liver-and-placenta
#1
Erin N Jackson, Laura Rowland-Faux, Margaret O James, Charles E Wood
Sulfonation is a major pathway of estrogen biotransformation with a role in regulating estrogen homeostasis in humans and sheep. Previous in vitro studies found that triclosan is an especially potent competitive inhibitor of ovine placental estrogen sulfotransferase, with Kic of <0.1 nM. As the placenta is the main organ responsible for estrogen synthesis in pregnancy in both women and sheep, and the liver is another site of estrogen biotransformation, this study examined the effects of triclosan exposure of pregnant ewes on placental and hepatic sulfotransferase activity...
May 14, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29684161/impact-of-heat-stress-during-the-follicular-phase-on-porcine-ovarian-steroidogenic-and-phosphatidylinositol-3-signaling
#2
M J Dickson, C L Hager, A Al-Shaibi, P Q Thomas, L H Baumgard, J W Ross, A F Keating
Environmental conditions that impede heat dissipation and increase body temperature cause heat stress (HS). The study objective was to evaluate impacts of HS on the follicular phase of the estrous cycle. Post-pubertal gilts (126.0 ± 21.6 kg) were orally administered altrenogest to synchronize estrus, and subjected to either 5 d of thermal neutral (TN; 20.3 ± 0.5°C; n = 6) or cyclical HS (25.4 - 31.9°C; n = 6) conditions during the follicular phase preceding behavioral estrus. On d 5, blood samples were obtained, gilts were euthanized, and ovaries collected...
April 19, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29588428/expression-of-sult2a1-sult2b1-and-hsd3b1-in-the-porcine-testis-and-epididymis
#3
Bettina Zimmer, Linda Tenbusch, Michele C Klymiuk, Yaser Dezhkam, Gerhard Schuler
In the porcine testis in addition to estrogen sulfates the formation of numerous sulfonated neutral hydroxysteroids has been observed. However, their functions and the underlying synthetic pathways are still widely unclear. To obtain further information on their formation in postpubertal boars the expression of sulfotransferases considered relevant for neutral hydroxysteroids (SULT2A1, SULT2B1) was investigated in the testis and defined segments of the epididymis applying real-time RT-qPCR, Western blot and immunohistochemistry (IHC)...
March 27, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29581787/sult1e1-inhibits-cell-proliferation-and-invasion-by-activating-ppar%C3%AE-in-breast-cancer
#4
Yali Xu, Xiaoyan Lin, Jiawen Xu, Haiyan Jing, Yejun Qin, Yintao Li
Sulfotransferase family 1E member 1 (SULT1E1) is known to catalyze sulfoconjugation and play a crucial role in the deactivation of estrogen homeostasis, which is involved in tumorigenesis and the progression of breast and endometrial cancers. Our previous study has shown that the protein levels of SULT1E1 were decreased in breast cancer; however, the underlying mechanism is still poorly understood. In this study, we explored the functional and molecular mechanisms by which SULT1E1 influenced breast cancer. Here, we identified that overexpression of SULT1E1 inhibited breast cancer cell growth through inducing apoptosis and arresting cell cycle progression...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29467139/formation-and-hydrolysis-of-sulfonated-estrogens-in-the-porcine-testis-and-epididymis
#5
Gerhard Schuler, Yaser Dezhkam, Linda Tenbusch, Michele C Klymiuk, Bettina Zimmer, Bernd Hoffmann
Boars exhibit high concentrations of sulfonated estrogens (SE) mainly originating from the testicular-epididymal compartment. Intriguingly, in porcine Leydig cells sulfonation of estrogens is colocalized with aromatase and steroid sulfatase (STS), indicating that de novo synthesis of unconjugated estrogens (UE), their sulfonation and hydrolysis of SE occur within the same cell type. So far in boars no plausible concept concerning the role of SE has been put forward. To obtain new information on SE formation and hydrolysis the porcine testicular-epididymal compartment was screened for the expression of the estrogen specific sulfotransferase SULT1E1 and STS applying real-time RT-qPCR, Western Blot and immunohistochemistry...
February 21, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29408762/hydroxylated-and-sulfated-metabolites-of-commonly-occurring-airborne-polychlorinated-biphenyls-inhibit-human-steroid-sulfotransferases-sult1e1-and-sult2a1
#6
Victoria S Parker, Edwin J Squirewell, Hans-Joachim Lehmler, Larry W Robertson, Michael W Duffel
Polychlorinated biphenyls (PCBs) are ubiquitous environmental contaminants that are associated with varied adverse health effects. Lower chlorinated PCBs are prevalent in indoor and outdoor air and can be metabolized to their hydroxylated derivatives (OH-PCBs) followed by sulfation to form PCB sulfates. Sulfation is also a means of signal termination for steroid hormones. The human estrogen sulfotransferase (SULT1E1) and alcohol/hydroxysteroid sulfotransferase (SULT2A1) catalyze the formation of steroid sulfates that are inactive at steroid hormone receptors...
March 2018: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29224107/sex-dependent-role-of-estrogen-sulfotransferase-and-steroid-sulfatase-in-metabolic-homeostasis
#7
Wojciech G Garbacz, Mengxi Jiang, Wen Xie
Sulfonation and desulfation are two opposing processes that represent an important layer of regulation of estrogenic activity via ligand supplies. Enzymatic activities of families of enzymes, known as sulfotransferases and sulfatases, lead to structural and functional changes of the steroids, thyroids, xenobiotics, and neurotransmitters. Estrogen sulfotransferase (EST) and steroid sulfatase (STS) represent negative and positive regulation of the estrogen activity, respectively. This is because EST-mediated sulfation deactivates estrogens, whereas STS-mediated desulfation converts the inactive estrogen sulfates to active estrogens...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29196065/steroidogenic-enzymes-their-products-and-sex-steroid-receptors-during-testis-development-and-spermatogenesis-in-the-domestic-cat-felis-catus
#8
Beate C Braun, Minami W Okuyama, Karin Müller, Martin Dehnhard, Katarina Jewgenow
In the present study we comprehensively characterize intratesticular sex steroid production, metabolism and receptors in the domestic cat to elucidate the role of testosterone, estradiol and progesterone in testis development, steroid synthesis and spermatogenesis. There is a great demand for new concepts of fertility control in domestic (feral) cats and wild felids. The acquired knowledge will help to understand the regulation of spermatogenesis in felids, and may reveal new target points for male contraception...
April 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28938414/sex-and-tissue-specific-role-of-estrogen-sulfotransferase-in-energy-homeostasis-and-insulin-sensitivity
#9
Wojciech G Garbacz, Mengxi Jiang, Meishu Xu, Jun Yamauchi, H Henry Dong, Wen Xie
Estrogen sulfotransferase catalyzes the sulfoconjugation and deactivation of estrogens. Previously, we showed that loss of Est in male ob/ob mice, but not in female ob/ob mice, exacerbated the diabetic phenotype, but the underlying mechanism was unclear. In this study, we show that transgenic reconstitution of Est in the adipose tissue, but not in the liver, attenuated diabetic phenotype in Est-deficient ob/ob mice (obe mice). Mechanistically, adipose reconstitution of Est in obe mice (oae mice) resulted in reduced local and systemic inflammation, improved insulin sensitivity, and increased energy expenditure...
November 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28912067/farnesoid-x-receptor-regulates-sult1e1-expression-through-inhibition-of-pgc1%C3%AE-binding-to-hnf4%C3%AE
#10
Shuai Wang, Xue Yuan, Danyi Lu, Lianxia Guo, Baojian Wu
Sulfotransferase 1E1 (SULT1E1, also known as estrogen sulfotransferase) plays an important role in metabolism and detoxification of many endogenous and exogenous compounds (e.g., estrogens and flavonoids). Here we aimed to assess the effects of farnesoid X receptor (FXR) activation on SULT1E1 expression, and to determine the mechanism thereof. Treatment with specific FXR agonists (i.e., GW4064 and CDCA) significantly decreased both mRNA and protein levels of SULT1E1 in HepG2 cells. This was accompanied by a decrease in the enzymatic activity...
December 1, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28867356/relationship-of-sult1a1-copy-number-variation-with-estrogen-metabolism-and-human-health
#11
Jixia Liu, Ran Zhao, Zhan Ye, Alexander J Frey, Emily R Schriver, Nathaniel W Snyder, Scott J Hebbring
Human cytosolic sulfotransferase 1A1 (SULT1A1) is considered to be one of the most important SULT isoforms for metabolism, detoxification, and carcinogenesis. This theory is driven by observations that SULT1A1 is widely expressed in multiple tissues and acts on a wide range of phenolic substrates. SULT1A1 is subject to functional common copy number variation (CNV) including deletions or duplications. However, it is less clear how SULT1A1 CNV impacts health and disease. To better understand the biological role of SULT1A1 in human health, we genotyped CNV in 14,275 Marshfield Clinic patients linked to an extensive electronic health record...
November 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28866654/hydroxylation-and-sulfation-of-sex-steroid-hormones-in-inflammatory-liver
#12
Sang R Lee, Seung-Yeon Lee, Sang-Yun Kim, Si-Yun Ryu, Bae-Kuen Park, Eui-Ju Hong
Sex steroids, also known as gonadal steroids, are oxidized with hydroxylation by cytochrome P450, glucuronidation by UDP-glucuronosyltransferase, sulfation by sulfotransferase, andO-methylation by catechol O-methyltransferase. Thus, it is important to determine the process by which inflammation influences metabolism of gonadal hormones. Therefore, we investigated the mechanism of metabolic enzymes against high physiologic inflammatory responsein vivo to study their biochemical properties in liver diseases. In this study, C57BL/6N mice were induced with hepatic inflammation by diethylnitrosamine (DEN) exposure...
September 26, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28797077/gender-difference-in-nash-susceptibility-roles-of-hepatocyte-ikk%C3%AE-and-sult1e1
#13
Noriko Matsushita, Mohamed T Hassanein, Marcos Martinez-Clemente, Raul Lazaro, Samuel W French, Wen Xie, Keane Lai, Michael Karin, Hidekazu Tsukamoto
Myeloid cell and hepatocyte IKKβ may mediate the genesis of obesity and insulin resistance in mice fed high fat diet. However, their gender-specific roles in the pathogenesis of non-alcoholic steatohepatitis (NASH) are not known. Here we demonstrate myeloid IKKβ deficiency prevents Western diet-induced obesity and visceral adiposity in females but not in males, and attenuates hyperglycemia, global IR, and NASH in both genders. In contrast, all metabolic sequela including NASH are aggravated by hepatocyte IKKβ deficiency (IkbkbΔhep) in male but not female mice...
2017: PloS One
https://www.readbyqxmd.com/read/28661152/profiles-and-gender-specifics-of-udp-glucuronosyltransferases-and-sulfotransferases-expressions-in-the-major-metabolic-organs-of-wild-type-and-efflux-transporter-knockout-fvb-mice
#14
Jiamei Chen, Haihui Zheng, Sijing Zeng, Cong Xie, Xiaoyan Li, Tongmeng Yan, Xia Gong, Linlin Lu, Xiaoxiao Qi, Ying Wang, Ming Hu, Lijun Zhu, Zhongqiu Liu
Hepatic and extrahepatic tissues participate in xenobiotic detoxication, carcinogen activation, prodrug processing, and estrogen regulation through UDP-glucuronosyltransferases (UGTs/Ugts) and sulfotransferases (SULTs/Sults). Wild-type (WT) and efflux transporter knockout (KO) FVB mice have been commonly used to perform the studies of pharmacokinetics, metabolism, and toxicity. We employed the developed UHPLC-MS/MS approach to gain systematic insight on gender-specific of Ugts and Sults in major metabolic organs...
July 17, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28588698/clinical-significance-of-the-estrogen-modifying-enzymes-steroid-sulfatase-and-estrogen-sulfotransferase-in-epithelial-ovarian-cancer
#15
Felicitas Mungenast, Stefanie Aust, Ignace Vergote, Adriaan Vanderstichele, Jalid Sehouli, Elena Braicu, Sven Mahner, Dan Cacsire Castillo-Tong, Robert Zeillinger, Theresia Thalhammer
17β-estradiol (E2) can contribute to the progression of epithelial ovarian cancer (EOC). Although the majority of patients with EOC are postmenopausal woman, when de novo estrogen production in the ovary has ceased, ovarian cancer cells remain exposed to estrogens synthesized locally in the cancer cells from inactive sulfonated steroid hormone precursors-such as estrone sulfate taken up from the circulation via the sulfatase pathway. An abundance of the estrogen-modifying enzymes, including estrogen-activating steroid sulfatase (STS) and estrogen-inactivating estrogen-sulfotransferase (SULT1E1), is important for providing active estrogen to EOC cells...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28552400/celecoxib-affects-estrogen-sulfonation-catalyzed-by-several-human-hepatic-sulfotransferases-but-does-not-stimulate-17-sulfonation-in-rat-liver
#16
Sriram Ambadapadi, Peter L Wang, Sergiu P Palii, Margaret O James
Celecoxib is known to alter the preferred position of SULT2A1-catalyzed sulfonation of 17β-estradiol (17β-E2) and other estrogens from the 3- to the 17-position. Understanding the effects of celecoxib on estrogen sulfonation is of interest in the context of the investigational use of celecoxib to treat breast cancer. This study examined the effects on celecoxib on cytosolic sulfotransferases in human and rat liver and on SULT enzymes known to be expressed in liver. Celecoxib's effects on the sulfonation of several steroids catalyzed by human liver cytosol were similar but not identical to those observed previously for SULT2A1...
September 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28222028/expression-purification-and-characterization-of-human-cytosolic-sulfotransferase-sult-1c4
#17
Amber L Guidry, Zachary E Tibbs, Melissa Runge-Morris, Charles N Falany
Human cytosolic sulfotransferase 1C4 (hSULT1C4) is a dimeric Phase II drug-metabolizing enzyme primarily expressed in the developing fetus. SULTs facilitate the transfer of a hydrophilic sulfonate moiety from 3'-phosphoadenosine-5'-phosphosulfate (PAPS) onto an acceptor substrate altering the substrate's biological activity and increasing the compound's water solubility. While several of the hSULTs' endogenous and xenobiotic substrates have been identified, the physiological function of hSULT1C4 remains unknown...
January 1, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28137252/enhanced-transcriptomic-responses-in-the-pacific-salmon-louse-lepeophtheirus-salmonis-oncorhynchi-to-the-non-native-atlantic-salmon-salmo-salar-suggests-increased-parasite-fitness
#18
Laura M Braden, Ben J G Sutherland, Ben F Koop, Simon R M Jones
BACKGROUND: Outcomes of infections with the salmon louse Lepeophtheirus salmonis vary considerably among its natural hosts (Salmo, Oncorhynchus spp.). Host-parasite interactions range from weak to strong host responses accompanied by high to low parasite abundances, respectively. Parasite behavioral studies indicate that the louse prefers the host Atlantic Salmon (Salmo salar), which is characterized by a weak immune response, and that this results in enhanced parasite reproduction and growth rates...
January 30, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28098598/science-of-intracrinology-in-postmenopausal-women
#19
REVIEW
Fernand Labrie, Alain Bélanger, Georges Pelletier, Céline Martel, David F Archer, Wulf H Utian
OBJECTIVE: To illustrate the marked differences between classical endocrinology that distributes hormones to all tissues of the body through the bloodstream and the science of intracrinology, whereby each cell of each peripheral tissue makes a small and appropriate amount of estrogens and androgens from the inactive precursor dehydroepiandrosterone (DHEA), DHEA being mainly of adrenal origin. Because only the inactivated sex steroids are released in the blood, influence in the other tissues is avoided...
June 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27940297/increased-levels-of-enzymes-involved-in-local-estradiol-synthesis-in-chronic-obstructive-pulmonary-disease
#20
G F J Konings, N L Reynaert, B Delvoux, F M Verhamme, K R Bracke, G G Brusselle, A Romano, J H J Vernooy
INTRODUCTION: Steroid hormones are involved in lung development, pulmonary inflammation, and lung cancer. Estrogen signaling and exposure may play a role in pulmonary disorders, including COPD. In both genders, estrogens can be generated locally in the lungs and this contributes importantly to the tissue exposure to these steroids. OBJECTIVE: To characterize and assess differences in localization of estrogen receptors and enzymes involved in the local generation of estrogens in COPD...
March 5, 2017: Molecular and Cellular Endocrinology
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