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https://www.readbyqxmd.com/read/28231273/periovulatory-follicular-fluid-levels-of-estradiol-trigger-inflammatory-and-dna-damage-responses-in-oviduct-epithelial-cells
#1
Sergio E Palma-Vera, Jennifer Schoen, Shuai Chen
OBJECTIVE: Ovarian steroid hormones (mainly E2 and P4) regulate oviduct physiology. Serum-E2 acts on the oviduct epithelium from the basolateral cell compartment. Upon ovulation, the apical compartment of the oviduct epithelium is temporarily exposed to follicular fluid, which contains much higher levels of E2 than serum. The aim of this study was to evaluate the effects of human periovulatory follicular fluid levels of E2 on oviduct epithelial cells using two porcine in vitro models...
2017: PloS One
https://www.readbyqxmd.com/read/28228528/clinical-genetic-and-structural-basis-of-congenital-adrenal-hyperplasia-due-to-11%C3%AE-hydroxylase-deficiency
#2
Ahmed Khattab, Shozeb Haider, Ameet Kumar, Samarth Dhawan, Dauood Alam, Raquel Romero, James Burns, Di Li, Jessica Estatico, Simran Rahi, Saleel Fatima, Ali Alzahrani, Mona Hafez, Noha Musa, Maryam Razzghy Azar, Najoua Khaloul, Moez Gribaa, Ali Saad, Ilhem Ben Charfeddine, Berenice Bilharinho de Mendonça, Alicia Belgorosky, Katja Dumic, Miroslav Dumic, Javier Aisenberg, Nurgun Kandemir, Ayfer Alikasifoglu, Alev Ozon, Nazli Gonc, Tina Cheng, Ursula Kuhnle-Krahl, Marco Cappa, Paul-Martin Holterhus, Munier A Nour, Daniele Pacaud, Assaf Holtzman, Sun Li, Mone Zaidi, Tony Yuen, Maria I New
Congenital adrenal hyperplasia (CAH), resulting from mutations in CYP11B1, a gene encoding 11β-hydroxylase, represents a rare autosomal recessive Mendelian disorder of aberrant sex steroid production. Unlike CAH caused by 21-hydroxylase deficiency, the disease is far more common in the Middle East and North Africa, where consanguinity is common often resulting in identical mutations. Clinically, affected female newborns are profoundly virilized (Prader score of 4/5), and both genders display significantly advanced bone ages and are oftentimes hypertensive...
February 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28225307/17a-hydroxylase-17-20-lyase-deficiency-clinical-and-molecular-characterization-of-eight-chinese-patients
#3
Chaoming Wu, Shanshan Fan, Yanying Qian, Yingying Zhou, Jian Jin, Zhijuan Dai, Ling Jiang
BACKGROUND: 17α-hydroxylase/17, 20-lyase deficiency (17OHD) is caused by mutations in CYP17A1 gene. OBJECTIVE: To better understand 17OHD, a rare disease, we described the clinical features and analyzed the CYP17A1 gene in eight affected Chinese patients. METHODS: Patients with complete (7/8) or partial (1/8) 17OHD were derived from six families. The diagnosis was established according to their clinical, biochemical, hormonal and radiological characteristics...
February 22, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28223343/associations-of-steroid-sex-hormones-and-sex-hormone-binding-globulin-with-the-risk-of-type-2-diabetes-in-women-a-population-based-cohort-study-and-meta-analysis
#4
Taulant Muka, Jana Nano, Loes Jaspers, Cindy Meun, Wichor M Bramer, Albert Hofman, Abbas Dehghan, Maryam Kavousi, Joop S E Laven, Oscar H Franco
It remains unclear whether endogenous sex hormones (ESH) are associated with risk of type 2 diabetes (T2D) in women. Data of 3,117 postmenopausal women participants of the Rotterdam Study were analyzed to examine whether ESH and sex hormone-binding globulin (SHBG) were associated with the risk of incident T2D. Additionally, we performed a systematic review and meta-analysis of studies assessing the prospective association of ESH and SHBG with T2D in women. During a median follow-up of 11.1 years, we identified 384 incident cases of T2D in the Rotterdam Study...
March 2017: Diabetes
https://www.readbyqxmd.com/read/28223035/effects-of-quinestrol-on-the-vocal-behavior-of-mice-during-courtship-interactions
#5
Yi Chen, Qianqian Su, Quansheng Liu
Vocalizations are a crucial part of courtship and mating in a wide variety of species. Mating behavior, including courtship calls, is modulated by sex steroid hormones. Male mice produce courtship ultrasonic vocalizations to attract females during heterosexual encounters. However, rare is the knowledge on whether vocal behavior of mice changes under sterilant treatment which will affect gonadal hormone levels. In the present study, we treat male mice with quinestrol, which interferes with the release of the gonadotropin-releasing hormone (GnRH) and has a significant anti-fertility effect in rodents...
February 18, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28222580/acute-and-delayed-responses-of-steroidal-hormones-blood-lactate-and-biomarkers-of-muscle-damage-after-a-resistance-training-session-time-of-day-effects
#6
Achraf Ammar, Hamdi Chtourou, Mouna Turki, Omar Hammouda, Ahmed Chaari, Mariem Boudaya, Tarak Driss, Fatma Ayedi, Nizar Souissi
BACKGROUND: The present study aimed to investigate the effect of time-of-days (TOD) on some biochemical and hormonal responses after resistance training sessions. METHODS: Ten trained subjects (22±2 years) performed, in randomized order, three resistance-training-sessions at 07h:00, 13h:00 and 17h:00. Each training-session included six upper and lower body resistance exercises with 3×10 repetitions. Blood lactate (Lac), creatine kinase (CK), lactate dehydrogenase (LDH), cortisol (C) and testosterone (T) were collected at rest, 3min and 48h after each-session...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28222424/1%C3%AE-25-oh-2d3-sensitive-cytosolic-ph-regulation-and-glycolytic-flux-in-human-endometrial-ishikawa-cells
#7
Ni Zeng, Yuetao Zhou, Shaqiu Zhang, Yogesh Singh, Bing Shi, Madhuri S Salker, Florian Lang
BACKGROUND/AIMS: Tumor cell proliferation is modified by 1,25-Dihydroxy-Vitamin D3 (1,25(OH)2D3), a steroid hormone predominantly known for its role in calcium and phosphorus metabolism. Key properties of tumor cells include enhanced glycolytic flux with excessive consumption of glucose and formation of lactate. As glycolysis is highly sensitive to cytosolic pH, maintenance of glycolysis requires export of H+ ions and lactate, which is in part accomplished by Na+/H+ exchangers, such as NHE1 and monocarboxylate transporters, such as MCT4...
February 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28220108/adaptations-in-basal-and-hypothalamic-pituitary-adrenal-activated-deoxycorticosterone-responses-following-ethanol-self-administration-in-cynomolgus-monkeys
#8
Vanessa A Jimenez, Patrizia Porcu, A Leslie Morrow, Kathleen A Grant
Acute ethanol activates the hypothalamic-pituitary-adrenal (HPA) axis, while long-term exposure results in a blunted neuroendocrine state, particularly with regards to the primary endpoint, cortisol, the primary glucocorticoid produced in the adrenal cortex. However, it is unknown if this dampened neuroendocrine status also influences other adrenocortical steroids. Plasma concentration of the mineralocorticoid and neuroactive steroid precursor deoxycorticosterone (DOC) is altered by pharmacological challenges of the HPA axis in cynomolgus monkeys...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28219743/significant-association-of-cyp19a-promoter-methylation-with-environmental-factors-and-gonadal-differentiation-in-olive-flounder-paralichthys-olivaceus
#9
Zhaofei Fan, Yuxia Zou, Shuang Jiao, Xungang Tan, Zhihao Wu, DongDong Liang, Peijun Zhang, Feng You
The sex ratio of olive flounder Paralichthys olivaceus is sensitive to temperature or exogenous hormone exposures in the period of gonadal differentiation. Among sex-related genes, cyp19a, encoding cytochrome P450 aromatase,exhibits significant sex-dimorphic expression pattern and plays an important role in fish gonadal differentiation and development. The present study investigated the expression levels and promoter methylation dynamics of cyp19a and its regulators (nr5a2 and nr0b1), and sex-steroid hormone levels during flounder gonadal differentiation under the treatments of high temperature and estradiol-17β (E2)...
February 17, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28218624/loss-of-microrna-7a2-induces-hypogonadotropic-hypogonadism-and-infertility
#10
Kashan Ahmed, Mary P LaPierre, Emanuel Gasser, Rémy Denzler, Yinjie Yang, Thomas Rülicke, Jukka Kero, Mathieu Latreille, Markus Stoffel
MicroRNAs (miRNAs) are negative modulators of gene expression that fine-tune numerous biological processes. miRNA loss-of-function rarely results in highly penetrant phenotypes, but rather, influences cellular responses to physiologic and pathophysiologic stresses. Here, we have reported that a single member of the evolutionarily conserved miR-7 family, miR-7a2, is essential for normal pituitary development and hypothalamic-pituitary-gonadal (HPG) function in adulthood. Genetic deletion of mir-7a2 causes infertility, with low levels of gonadotropic and sex steroid hormones, small testes or ovaries, impaired spermatogenesis, and lack of ovulation in male and female mice, respectively...
February 20, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28217829/vitamin-d-and-autism-what-s-new
#11
REVIEW
John Jacob Cannell
An increasing amount of evidence points to the possibility that gestational and early childhood vitamin D deficiency [25(OH)D < 40 ng/ml] cause some cases of autism. Vitamin D is metabolized into a seco-steroid hormone that regulates about 3% of the 26,000 genes in the coding human genome. It is also a neurosteroid that is active in brain development, having effects on cellular proliferation, differentiation, calcium signaling, neurotrophic and neuroprotective actions; it also appears to have an effect on neurotransmission and synaptic plasticity...
February 20, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28215488/gonadotropin-releasing-hormone-agonist-gnrha-trigger-state-of-the-art
#12
REVIEW
C Dosouto, T Haahr, P Humaidan
GnRH agonist (GnRHa) trigger for final oocyte maturation in GnRH antagonist co-treated IVF/ICSI cycles significantly reduces the risk of ovarian hyperstimulation syndrome (OHSS). GnRHa trigger followed by modifications of the standard luteal phase support (modified luteal phase support) secures fresh transfer in the majority of patients with excellent reproductive outcomes. In freeze all cycles (segmented cycles) GnRHa trigger allows oocyte retrieval with a minimal risk of early onset OHSS and good reproductive outcomes in subsequent frozen thaw cycles...
February 16, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28215225/transcription-factors-in-breast-cancer-lessons-from-recent-genomic-analyses-and-therapeutic-implications
#13
E Zacksenhaus, J C Liu, Z Jiang, Y Yao, L Xia, M Shrestha, Y Ben-David
Multiplatform genomic analyses have identified 93 frequently altered genes in breast cancer. Of these, as many as 49 genes are directly or indirectly involved in transcription. These include constitutive and inducible DNA-binding transcription factors (DB-TFs, 13 genes), corepressors/coactivators (14 genes), epigenetic (10), and mediator/splicing/rRNA (3) factors. At least nine additional genes are immediate upstream regulators of transcriptional cofactors. G:profiler analysis reveals that these alterations affect cell cycle, development/differentiation, steroid hormone, and chromatin modification pathways...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28214680/exploring-the-role-of-testosterone-in-the-cerebellum-link-to-neuroticism-from-adolescence-to-early-adulthood
#14
Dennis J L G Schutter, Rosa Meuwese, Marieke G N Bos, Eveline A Crone, Jiska S Peper
Previous research has found an association between a smaller cerebellar volume and higher levels of neuroticism. The steroid hormone testosterone reduces stress responses and the susceptibility to negative mood. Together with in vitro studies showing a positive effect of testosterone on cerebellar gray matter volumes, we set out to explore the role of testosterone in the relation between cerebellar gray matter and neuroticism. Structural magnetic resonance imaging scans were acquired, and indices of neurotic personality traits were assessed by administering the depression and anxiety scale of the revised NEO personality inventory and Gray's behavioural avoidance in one hundred and forty-nine healthy volunteers between 12 and 27 years of age...
January 29, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28214679/estradiol-is-a-critical-regulator-of-food-reward-behavior
#15
Jennifer E Richard, Lorena López-Ferreras, Rozita H Anderberg, Kajsa Olandersson, Karolina P Skibicka
Food intake is reduced by estrogenic hormones, levels of which vary throughout life and fluctuate throughout the ovarian cycle in females. However, estrogens have also been shown to increase reward derived from drugs of abuse, where motivational properties of drugs and progression to addiction are potentiated by estrogens. Whether reward derived from food, and specifically motivational properties of food, are altered by estrogens remains unknown. Here we investigated the effect of the estrous cycle on food reward behavior and show estrous cycle dictated variability in food motivation, measured by progressive ratio operant conditioning, in female rats...
January 28, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28212711/advances-in-clinical-mass-spectrometry
#16
D French
Although mass spectrometry has been used clinically for decades, the advent of immunoassay technology moved the clinical laboratory to more labor saving automated platforms requiring little if any sample preparation. It became clear, however, that immunoassays lacked sufficient sensitivity and specificity necessary for measurement of certain analytes or for measurement of analytes in specific patient populations. This limitation prompted clinical laboratories to revisit mass spectrometry which could additionally be used to develop assays for which there was no commercial source...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28212612/african-ancestry-is-associated-with-facial-melasma-in-women-a-cross-sectional-study
#17
Maria Paula Barbieri D'Elia, Marcela Calixto Brandão, Bruna Ribeiro de Andrade Ramos, Márcia Guimarães da Silva, Luciane Donida Bartoli Miot, Sidney Emanuel Batista Dos Santos, Hélio Amante Miot
BACKGROUND: Melasma is a chronic acquired focal hypermelanosis affecting photoexposed areas, especially for women during fertile age. Several factors contribute to its development: sun exposure, sex steroids, medicines, and family history. Melanic pigmentation pathway discloses several SNPs in different populations. Here, we evaluated the association between genetic ancestry and facial melasma. METHODS: A cross-sectional study involving women with melasma and an age-matched control group from outpatients at FMB-Unesp, Botucatu-SP, Brazil was performed...
February 17, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28212122/a-research-of-soft-tissue-lipoma-genesis-factor-with-immunohistochemical-analysis
#18
Jun Beom Lee, Hwan Jun Choi, Eun Taik Son, Jun Hyuk Kim
INTRODUCTION: Lipoma is the most familiar soft-tissue tumor. But the etiology of lipoma remains imprecise. Sex steroid hormones such as estrogen have effects on muscle and adipose tissue development. There is now significant evidence that sex steroids are involved in the site specificities of adipose tissue metabolism. This association of adipose tissue metabolism between sex steroid hormones suggests a possible role for sex steroids in the pathogenesis of lipoma. METHODS: To investigate this concept, the authors evaluated the expression of the estrogen receptor (ER) and the progesterone receptor (PR) in soft tissue lipoma in this study...
February 16, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28208702/the-glutamate-dehydrogenase-pathway-and-its-roles-in-cell-and-tissue-biology-in-health-and-disease
#19
REVIEW
Andreas Plaitakis, Ester Kalef-Ezra, Dimitra Kotzamani, Ioannis Zaganas, Cleanthe Spanaki
Glutamate dehydrogenase (GDH) is a hexameric enzyme that catalyzes the reversible conversion of glutamate to α-ketoglutarate and ammonia while reducing NAD(P)⁺ to NAD(P)H. It is found in all living organisms serving both catabolic and anabolic reactions. In mammalian tissues, oxidative deamination of glutamate via GDH generates α-ketoglutarate, which is metabolized by the Krebs cycle, leading to the synthesis of ATP. In addition, the GDH pathway is linked to diverse cellular processes, including ammonia metabolism, acid-base equilibrium, redox homeostasis (via formation of fumarate), lipid biosynthesis (via oxidative generation of citrate), and lactate production...
February 8, 2017: Biology
https://www.readbyqxmd.com/read/28207414/anti-aging-effects-of-m2000-%C3%AE-d-mannuronic-acid-as-a-novel-immunosuppressive-drug-on-the-enzymatic-and-non-enzymatic-oxidative-stress-parameters-in-an-experimental-model
#20
Soma Hosseini, Mohammad Abdollahi, Gholamreza Azizi, Mohammad Javad Fattahi, Noshin Rastkari, Farzaneh Tofighi Zavareh, Zahra Aghazadeh, Abbas Mirshafiey
BACKGROUND: The anti-aging property of β-D-mannuronic acid (M2000) as a novel non-steroidal anti-inflammatory and immunosuppressive agent was investigated on several determinants relative to the oxidative stress in an animal model. MATERIALS AND METHODS: Sprague-Dawley rats were used for evaluating the safety and efficacy properties of M2000 on some oxidative stress enzymes, including the following: mitochondrial superoxide dismutase (SOD2), catalase (CAT), glutathione peroxidase (GPX1), glutathione S-transferase (GST), myeloperoxidase (MPO), and inducible nitric oxide synthase (iNOS) gene expression by real-time PCR...
February 16, 2017: Journal of Basic and Clinical Physiology and Pharmacology
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