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Female sex hormones

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https://www.readbyqxmd.com/read/28821466/endocrine-disrupting-effects-of-waterborne-fluoxetine-exposure-on-the-reproductive-axis-of-female-goldfish-carassius-auratus
#1
Jan A Mennigen, Jacob M Zamora, John P Chang, Vance L Trudeau
Evidence suggests that pharmaceuticals and personal care products reach urban watersheds, bioconcentrate in fish, and potentially disrupt physiological homeostasis. These impairments often affect hormone functions. Selective serotonin reuptake inhibitors (SRRIs) are increasingly studied with regards to their endocrine disrupting effects on teleost physiological processes, including reproduction. To examine whether FLX effects on the endocrine regulation of reproductive physiology in goldfish are sex-specific, we exposed sexually recrudescent female goldfish to two waterborne concentrations of FLX (0...
August 15, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/28817387/response-of-an-ovarian-granulosa-cell-tumor-with-everolimus-and-exemestane-after-initial-response-to-letrozole
#2
Tarek Assi, Hampig R Kourie, Elie El Rassy, Tania Moussa, Joseph Kattan
Granulosa cell tumors of the ovaries (GCTO), the most common sex cord tumors of the female genitalia, are characterized by a remarkably favorable prognosis but tend to recur even after several years of follow-up. Standard approach to manage these relapsing tumors is almost inexistent and physicians' choice is most commonly based on his/her personal expertise. Recently, the use of hormone therapy in GCTO has induced prolonged response and survival. In this case report, we report the first successful use of everolimus in the combination of exemestane to reverse the resistance to hormonal therapy with letrozole in a 53-year-old woman with GCTO...
September 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28816296/-complete-androgen-insensitivity-syndrome-associated-with-vesical-fistula-a-case-report-and-literature-review
#3
K H Hua, L Yang, X W Zhang, W J Bai, Q Li, T Xu
Androgen insensitivity syndrome (AIS) is a very uncommon genetic disorder that results from the resistance of androgen receptor (AR) to androgen, which influences the formation of the male genitalia and in turn presents with female phenotype. Surgical resection of undesceaded testicle and different kinds of genitoplasty are crucial methods to correct the deformity of reproductive system, as well as hormone replacement therapy, which is an essential therapy for postoperational rehabilitation in AIS patients...
August 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28811937/association-between-salivary-leptin-levels-and-taste-perception-in-children
#4
Lénia Rodrigues, Rosa Espanca, Ana Rodrigues Costa, Célia Miguel Antunes, Clarinda Pomar, Fernando Capela-Silva, Cristina Conceição Pinheiro, Francisco Amado, Elsa Lamy
The satiety inducing hormone leptin acts not only at central nervous system but also at peripheral level. Leptin receptors are found in several sense related organs, including the mouth. A role of leptin in sweet taste response has been suggested but, until now, studies have been based on in vitro experiments, or in assessing the levels of the hormone in circulation. The present study investigated whether the levels of leptin in saliva are related to taste perception in children and whether Body Mass Index (BMI) affects such relationship...
2017: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/28811598/effects-of-contaminants-of-emerging-concern-on-megaselia-scalaris-lowe-diptera-phoridae-and-its-microbial-community
#5
Marcus J Pennington, Jason A Rothman, Michael B Jones, Quinn S McFrederick, Jay Gan, John T Trumble
Drought, rising temperatures, and expanding human populations are increasing water demands. Many countries are extending potable water supplies by irrigating crops with wastewater. Unfortunately, wastewater contains biologically active, long-lived pharmaceuticals, even after treatment. Run-off from farms and wastewater treatment plant overflows contribute high concentrations of pharmaceuticals to the environment. This study assessed the effects of common pharmaceuticals on a cosmopolitan saprophagous insect, Megaselia scalaris (Diptera: Phoridae)...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811502/sex-steroid-hormones-regulate-leptin-transcript-accumulation-and-protein-secretion-in-3t3-l1-cells
#6
Mónica Z Jenks, Heather E Fairfield, Erik C Johnson, Ron F Morrison, Gloria K Muday
Leptin is an adipokine produced by fat cells that regulates food consumption and metabolic activity. Sexual dimorphism in leptin and fat stores have been observed in humans and rodents with females having more leptin and greater levels of subcutaneous fat than males. One potential mechanism leading to this dimorphism is steroid hormone regulated synthesis of transcripts encoding leptin. Identification of direct regulatory mechanisms is difficult in animals or primary adipocytes due to these intertwined dimorphisms...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811091/pregravid-hypertension-may-have-different-secondary-sex-ratio-effects-in-different-races-in-the-united-states
#7
Victor Grech
BACKGROUND: Males are born in excess of females and the ratio is expressed as M/F (male/female births=secondary sex ratio, also known as secondary sex ratio). This is expected to approximate 1.048. Racial M/F disparities are known. A recent study in China showed that pregravid systolic hypertension is higher in women who delivered a boy than in those who had a girl. This study was carried out in order to identify the effect of pregravid hypertension in the United States on M/F by race...
August 9, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28805160/clinical-implications-of-immunoglobulin-g4-to-graves-ophthalmopathy
#8
Sung Hoon Yu, Jun Goo Kang, Chul Sik Kim, Sung-Hee Ihm, Moon Gi Choi, Hyung Joon Yoo, Seong Jin Lee
BACKGROUND: This study aimed to explore relation of immunoglobulin G4 (IgG4) to clinical and laboratory characteristics of patients newly diagnosed with Graves' disease (GD) without or with Graves' ophthalmopathy (GO), and to analyze association of IgG4 with development and grade of GO in GD patients. METHODS: Sixty-four GD patients and 64 sex- and age-matched euthyroid subjects were enrolled. Serum levels of thyroid hormones, thyroid autoantibodies, immunoglobulin G (IgG) and IgG4 were measured, and ophthalmological and ultrasonographical evaluation was performed...
August 12, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28803209/20-hydroxyecdysone-attenuates-cardiac-remodeling-in-spontaneously-hypertensive-rats
#9
Sukanya Phungphong, Anusak Kijtawornrat, Sirinut Chaiduang, Vitoon Saengsirisuwan, Tepmanas Bupha-Intr
BACKGROUND: Ecdysteroids, a group of steroid hormones found in insects and many plants, have been shown to prevent various changes in mammalian tissues after female sex hormone deprivation. PURPOSE: To examine whether an ecdysteroid, 20-hydroxyecdysone (20-HE), exhibits regulatory or protective roles in the cardiovascular system. STUDY DESIGN/METHOD: Blood pressure and cardiac function were evaluated in spontaneously hypertensive rats (SHR) during and after daily treatment with 20-HE for six weeks...
August 9, 2017: Steroids
https://www.readbyqxmd.com/read/28800644/cytokine-and-hormonal-regulation-of-bone-marrow-immune-cell-wnt10b-expression
#10
Fraser L Collins, Naiomy Deliz Rios-Arce, Laura R McCabe, Narayanan Parameswaran
BACKGROUND & AIMS: Wnt10b is a crucial regulator of bone density through its ability to promote osteoblastogenesis. Parathyroid hormone has been shown to regulate Wnt10b expression in CD8+ T cells. However, the relative expression and other source(s) of Wnt10b in the bone marrow immune cells (BMICs) is unknown. Sex hormones and cytokines such as, estrogen and TNFα are critical regulators of bone physiology but whether they regulate BMIC Wnt10b expression is unclear. To determine the potential regulation of Wnt10b by estrogen and TNFα, we assessed Wnt10b expression by flow cytometry under estrogen- and TNFα-deficient conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28800472/phthalate-and-bisphenol-a-exposure-during-in-utero-windows-of-susceptibility-in-relation-to-reproductive-hormones-and-pubertal-development-in-girls
#11
Deborah J Watkins, Brisa N Sánchez, Martha Maria Téllez-Rojo, Joyce M Lee, Adriana Mercado-García, Clara Blank-Goldenberg, Karen E Peterson, John D Meeker
BACKGROUND: Over the past several decades, the age of pubertal onset in girls has shifted downward worldwide. As early pubertal onset is associated with increased risky behavior and psychological issues during adolescence and cardiometabolic disease and cancer in adulthood, this is an important public health concern. Exposure to endocrine disrupting chemicals during critical windows of in utero development may play a role in this trend. Our objective was to investigate trimester-specific phthalate and BPA exposure in relation to pubertal development among girls in the Early Life Exposure in Mexico to Environmental Toxicants (ELEMENT) birth cohort...
August 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/28795307/sex-symptom-severity-and-quality-of-life-in-rheumatology
#12
REVIEW
Marco Krasselt, Christoph Baerwald
Inflammatory rheumatic diseases such as rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) show a striking female predominance ranging from 3:1 in RA up to 9:1 in SLE. The background for those gender bias is not fully understood yet, but seems to be the result of a complex interaction between sex hormones, (epi-)genetics, and possibly even the composition of gut microbiota. Moreover, time of disease onset, the clinical phenotype including co-morbidities as well as the course of the diseases during life differ between genders...
August 9, 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/28794413/chemical-diplomacy-in-male-tilapia-urinary-signal-increases-sex-hormone-and-decreases-aggression
#13
João L Saraiva, Tina Keller-Costa, Peter C Hubbard, Ana Rato, Adelino V M Canário
Androgens, namely 11-ketotestosterone (11KT), have a central role in male fish reproductive physiology and are thought to be involved in both aggression and social signalling. Aggressive encounters occur frequently in social species, and fights may cause energy depletion, injury and loss of social status. Signalling for social dominance and fighting ability in an agonistic context can minimize these costs. Here, we test the hypothesis of a 'chemical diplomacy' mechanism through urinary signals that avoids aggression and evokes an androgen response in receiver males of Mozambique tilapia (Oreochromis mossambicus)...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28782547/early-life-stress-increases-testosterone-and-corticosterone-and-alters-stress-physiology-in-zebra-finches
#14
J Bayley Zito, Angy Hanna, Nora Kadoo, Michelle L Tomaszycki
Early life stress has enduring effects on behavior and physiology. However, the effects on hormones and stress physiology remain poorly understood. In the present study, parents of zebra finches of both sexes were exposed to an increased foraging paradigm from 3 to 33days post hatching. Plasma and brains were collected from chicks at 3 developmental time points: post hatching days 25, 60 and adulthood. Plasma was assayed for testosterone (T), estradiol (E2), and corticosterone (CORT). The paraventricular nucleus of the hypothalamus was assessed for corticotrophin releasing factor (CRH) and glucocorticoid receptor (GR) expression...
August 15, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28782534/variation-in-adrenal-and-thyroid-hormones-with-life-history-stage-in-juvenile-northern-elephant-seals-mirounga-angustirostris
#15
J A Jelincic, M S Tift, D S Houser, D E Crocker
The classical approach to quantifying the impact of stressors on wildlife is through characterization of hormones associated with the generalized stress response. However, interpretation of hormone data can be difficult due to the range of natural variation within a species and potential confounds of individual and life-history variables. Blood adrenal and thyroid hormones were measured in 144 chemically immobilized yearling northern elephant seals (Mirounga angustirostris) to characterize variation between sexes and across semiannual haul-outs...
August 3, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28782533/co-localization-of-three-gonadotropin-releasing-hormone-transcripts-in-larval-parasitic-and-adult-sea-lamprey-brains
#16
Emily R Van Gulick, Timothy J Marquis, Stacia A Sower
RNA expression of lamprey gonadotropin-releasing hormone (lGnRH)-I, -II, and -III was demonstrated in the brains of larval, parasitic phase and adult sea lampreys, Petromyzon marinus, using a highly sensitive triple-label in situ hybridization technique. In female larval lampreys, lGnRH-I and-II were co-expressed in the same neurons throughout the olfactory bulbs, preoptic area (POA), and rhombencephalon (hindbrain); lGnRH-I, -II and -III were triple co-expressed in the hypothalamus and in the paranuclear region of neuronal somas in the rhombencephalon...
August 3, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28776866/prenatal-androgen-receptor-activation-determines-adult-alcohol-and-water-drinking-in-a-sex-specific-way
#17
Sabine E Huber, Iulia Zoicas, Martin Reichel, Christiane Mühle, Christian Büttner, Arif B Ekici, Volker Eulenburg, Bernd Lenz, Johannes Kornhuber, Christian P Müller
Alcohol use disorders are major psychiatric disorders. Correlational studies in humans suggested organizational hormonal effects during embryonic development as a risk factor for adult alcohol dependence. Permanent changes can be induced by the activity of sex hormones, like testosterone. Here, we demonstrate a relationship between prenatal androgen receptor (AR)-activation and adult alcohol as well as water drinking in mice in a sex-dependent fashion. Prenatal AR inhibition using the antagonist flutamide decreased adult male alcohol consumption...
August 4, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28772150/low-dose-developmental-exposure-to-bisphenol-a-induces-sex-specific-effects-in-bone-of-fischer-344-rat-offspring
#18
Thomas Lind, Margareta H Lejonklou, Linda Dunder, Annica Rasmusson, Sune Larsson, Håkan Melhus, P Monica Lind
BACKGROUND: Bisphenol A (BPA) is a component of polycarbonate plastics to which humans are regularly exposed at low levels, and an endocrine disruptor with effects on several hormonal systems. Bone is a sensitive hormone target tissue, and we have recently shown that in utero and lactational exposure to 25µg BPA/kg BW/day alters femoral geometry in rat offspring. OBJECTIVE: To investigate bone effects in rat offspring after developmental exposure to a BPA dose in the range of human daily exposure (0...
July 31, 2017: Environmental Research
https://www.readbyqxmd.com/read/28771179/leptin-receptor-gene-variant-rs11804091-is-associated-with-bmi-and-insulin-resistance-in-spanish-female-obese-children-a-case-control-study
#19
Josune Olza, Azahara I Rupérez, Mercedes Gil-Campos, Rosaura Leis, Ramón Cañete, Rafael Tojo, Ángel Gil, Concepción M Aguilera
Leptin is an endocrine hormone that has a critical role in body weight homoeostasis and mediates its effects via the leptin receptor (LEPR). Common polymorphisms in the genes coding leptin receptors have been associated with metabolic abnormalities. We assessed the association of 28 LEPR polymorphisms with body mass index (BMI) and their relationship with obesity-related phenotypes, inflammation and cardiovascular disease risk biomarkers. A multicentre case-control study was conducted in 522 children (286 with obesity and 236 with normal-BMI)...
August 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28768472/phenotypic-integration-mediated-by-hormones-associations-among-digit-ratios-body-size-and-testosterone-during-tadpole-development
#20
Leandro Lofeu, Renata Brandt, Tiana Kohlsdorf
BACKGROUND: Developmental associations often explain phenotypic integration. The intersected hormonal regulation of ontogenetic processes fosters predictions of steroid-mediated phenotypic integration among sexually dimorphic traits, a statement defied by associations between classical dimorphism predictors (e.g. body size) and traits that apparently lack sex-specific functions (e.g. ratios between the lengths of Digits II and IV - 2D:4D). Developmental bases of female-biased 2D:4D have been identified, but these remain unclear for taxa presenting male-biased 2D:4D (e...
August 2, 2017: BMC Evolutionary Biology
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