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https://www.readbyqxmd.com/read/29774795/prospective-evaluation-of-hypogonadism-in-male-metastatic-renal-cell-carcinoma-patients-treated-with-targeted-therapies
#1
Julie Bastin, Emilie Werbrouck, Annelies Verbiest, Kevin Punie, Oliver Bechter, Sherida Feng Woei-A-Jin, Pascal Wolter, Hans Wildiers, Evelyne Lerut, Herlinde Dumez, Brigitte Decallonne, Paul Clement, Dirk Vanderschueren, Maarten Albersen, Raymond Oyen, Patrick Schöffski, Benoit Beuselinck
Objectives To study the prevalence of hypogonadism in male patients with metastatic renal cell carcinoma (mRCC) starting with targeted therapies and the impact of the vascular endothelial growth factor receptor tyrosine kinase inhibitors (VEGFR-TKIs) sunitinib and pazopanib on the luteinizing hormone (LH)/testosterone (TT)-axis. Methods Male mRCC patients starting with targeted therapies were prospectively included in this study. TT- and LH-levels were sampled at start as well as during systemic therapy. Endpoints of the study were gonadal status (TT- and LH-levels) at start of targeted therapy and TT- and LH-evolution during targeted therapy...
May 18, 2018: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29772511/estrogenic-potency-of-mc-lr-is-induced-via-stimulating-steroidogenesis-in-vitro-and-in-vivo-evidence
#2
Jie Hou, Yujing Su, Wang Lin, Honghui Guo, Li Li, Donald M Anderson, Dapeng Li, Rong Tang, Wei Chi, Xi Zhang
Waterborne microcystin-LR (MC-LR) has been reported to disrupt sex hormones, while its estrogenic potency remains controversial. We hypothesized that MC-LR could induce estrogenic effects via disrupting sex hormone synthesis, and verified this hypothesis by in vitro and in vivo assays. Effects of MC-LR (1, 10, 100, 500, 1000 and 5000 μg/L) on steroidogenesis were assessed in the H295R cells after 48 h. The contents of 17β-estradiol (E2) and testosterone (T) increased in a non-dose-dependent manner, which showed positive correlations with the expression of steroidogenic genes...
May 14, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29771451/modulation-of-inflammatory-and-hormonal-parameters-in-response-to-testosterone-therapy-effects-on-the-ventral-prostate-of-adult-rats
#3
Leonardo O Mendes, Anthony C S Castilho, Cristiane F Pinho, Bianca F Gonçalvez, Eduardo M Razza, Luiz Gustavo A Chuffa, Janete A Anselmo-Franci, Wellerson R Scarano, Francisco E Martinez
Testosterone is often recommended in the treatment of several aging-related conditions. However, there are still questions about the consequences of this therapy in terms of hormonal and inflammatory parameters that are crucial for prostate homeostasis.Thus, we investigate if the testosterone therapy (TT) modulates the hormone receptors and inflammatory cytokines in the ventral prostate of adult rats. Wistar rats aging 150 days were divided into two experimental groups(n = 10/group): T: received subcutaneous injections of testosterone cypionate (5mg/kg body weight) diluted in corn oil every other day for 4 weeks; and C: received corn oil as vehicle...
May 17, 2018: Cell Biology International
https://www.readbyqxmd.com/read/29770127/temporal-expression-patterns-of-genes-related-to-sex-steroid-action-in-sexually-dimorphic-nuclei-during-puberty
#4
Moeko Kanaya, Masahiro Morishita, Shinji Tsukahara
Sex steroids play a major role in sexually dimorphic brain development during not only the perinatal period but also the pubertal period. We previously showed that, in male mice, the estrogen receptor-α ( Esr1 ) and aromatase ( Cyp19a1 ) genes are essential to the sexually dimorphic formation of the anteroventral periventricular nucleus (AVPV) and the principal nucleus of the bed nucleus of the stria terminalis (BNSTp), but the estrogen receptor-β ( Esr2 ) gene is not necessary. We also showed that the androgen receptor ( Ar ) gene is essential to the sexually dimorphic formation of the BNSTp...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29768628/androgen-insensitivity-syndrome-a-review
#5
Rafael Loch Batista, Elaine M Frade Costa, Andresa de Santi Rodrigues, Nathalia Lisboa Gomes, José Antonio Faria, Mirian Y Nishi, Ivo Jorge Prado Arnhold, Sorahia Domenice, Berenice Bilharinho de Mendonca
Androgenic insensitivity syndrome is the most common cause of disorders of sexual differentiation in 46,XY individuals. It results from alterations in the androgen receptor gene, leading to a frame of hormonal resistance, which may present clinically under 3 phenotypes: complete (CAIS), partial (PAIS) or mild (MAIS). The androgen receptor gene has 8 exons and 3 domains, and allelic variants in this gene occur in all domains and exons, regardless of phenotype, providing a poor genotype - phenotype correlation in this syndrome...
March 2018: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29765299/src-kinase-dependent-rapid-non-genomic-modulation-of-hippocampal-spinogenesis-induced-by-androgen-and-estrogen
#6
Mika Soma, Jonghyuk Kim, Asami Kato, Suguru Kawato
Dendritic spine is a small membranous protrusion from a neuron's dendrite that typically receives input from an axon terminal at the synapse. Memories are stored in synapses which consist of spines and presynapses. Rapid modulations of dendritic spines induced by hippocampal sex steroids, including dihydrotestosterone (DHT), testosterone (T), and estradiol (E2), are essential for synaptic plasticity. Molecular mechanisms underlying the rapid non-genomic modulation through synaptic receptors of androgen (AR) and estrogen (ER) as well as its downstream kinase signaling, however, have not been well understood...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29760445/elevated-prenatal-anti-m%C3%A3-llerian-hormone-reprograms-the-fetus-and-induces-polycystic-ovary-syndrome-in-adulthood
#7
Brooke Tata, Nour El Houda Mimouni, Anne-Laure Barbotin, Samuel A Malone, Anne Loyens, Pascal Pigny, Didier Dewailly, Sophie Catteau-Jonard, Inger Sundström-Poromaa, Terhi T Piltonen, Federica Dal Bello, Claudio Medana, Vincent Prevot, Jerome Clasadonte, Paolo Giacobini
Polycystic ovary syndrome (PCOS) is the main cause of female infertility worldwide and corresponds with a high degree of comorbidities and economic burden. How PCOS is passed on from one generation to the next is not clear, but it may be a developmental condition. Most women with PCOS exhibit higher levels of circulating luteinizing hormone, suggestive of heightened gonadotropin-releasing hormone (GnRH) release, and anti-Müllerian hormone (AMH) as compared to healthy women. Excess AMH in utero may affect the development of the female fetus...
May 14, 2018: Nature Medicine
https://www.readbyqxmd.com/read/29753248/embryonic-exposure-to-benzo-a-pyrene-inhibits-reproductive-capability-in-adult-female-zebrafish-and-correlation-with-dna-methylation
#8
Dongxu Gao, Jing Lin, Kunlin Ou, Ying Chen, Hongbin Li, Qinhua Dai, Zhenni Yu, Zhenghong Zuo, Chonggang Wang
This study was conducted to investigate the effects of embryonic short-term exposure to benzo(a)pyrene (BaP), a model polycyclic aromatic hydrocarbon, on ovarian development and reproductive capability in adult female zebrafish. In 1-year-old fish after embryonic exposure to BaP for 96 h, the gonadosomatic indices and the percentage of mature oocytes were significantly decreased in the 0.5, 5 and 50 nmol/L treatments. The spawned egg number, the fertilization rate and the hatching success were significantly reduced, while the malformation rate of the F1 unexposed larvae were increased...
May 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29752749/preliminary-evidence-that-androgen-signaling-is-correlated-with-men-s-everyday-language
#9
Jennifer S Mascaro, Kelly E Rentscher, Patrick D Hackett, Adriana Lori, Alana Darcher, James K Rilling, Matthias R Mehl
OBJECTIVES: Testosterone (T) has an integral, albeit complex, relationship with social behavior, especially in the domains of aggression and competition. However, examining this relationship in humans is challenging given the often covert and subtle nature of human aggression and status-seeking. The present study aimed to investigate whether T levels and genetic polymorphisms in the AR gene are associated with social behavior assessed via natural language use. METHODS: We used unobtrusive, behavioral, real-world ambulatory assessments of men in partnered heterosexual relationships to examine the relationship between plasma T levels, variation in the androgen receptor (AR) gene, and spontaneous, everyday language in three interpersonal contexts: with romantic partners, with co-workers, and with their children...
May 11, 2018: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/29748247/reduced-levels-of-stromal-sex-hormone-binding-globulin-and-androgen-receptor-dysfunction-in-the-sperm-storage-region-of-the-rat-epididymis
#10
Fabiane de Santi, Flávia L Beltrame, Barry T Hinton, Paulo S Cerri, Estela Sasso-Cerri
The cauda epididymidis is the major sperm storage region whose androgenic supply, essential for the sperm viability, is provided by the vasculature and is dependent upon testosterone diffusion through the stromal tissue to reach the epithelial cells. We have focused our efforts on examining the regulation of this important epididymal region by evaluating the impact of the androgen disrupter cimetidine on the epithelial-stromal androgenic microenvironment. Male rats received 100 mg/kg cimetidine (CMTG) or saline (CG) for 50 days, serum testosterone levels were measured and the epididymal cauda region was processed for light and transmission electron microscopy...
June 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29746933/postnatal-exposure-to-a-glyphosate-based-herbicide-modifies-mammary-gland-growth-and-development-in-wistar-male-rats
#11
Gabriela A Altamirano, Melisa B Delconte, Ayelen L Gomez, Paola Ingaramo, Verónica L Bosquiazzo, Enrique H Luque, Mónica Muñoz-de-Toro, Laura Kass
Our aim was to evaluate whether postnatal exposure to a glyphosate-based herbicide (GBH) modifies mammary gland development in pre- and post-pubertal male rats. From postnatal day 1 (PND1) to PND7, male rats were injected subcutaneously every 48 h with either saline solution (vehicle) or 2 mg GBH/kg·bw. On PND21 and PND60, mammary gland and blood samples were collected. Estradiol (E2) and testosterone (T) serum levels, mammary gland histology, collagen fiber organization, mast cell infiltration, proliferation index, and estrogen (ESR1) and androgen receptor (AR) expression levels were evaluated...
May 7, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29742817/effects-of-thyroid-dysfunction-on-reproductive-hormones-in-female-rats
#12
Juan Liu, Meng Guo, Xusong Hu, Xuechun Weng, Ye Tian, Kaili Xu, Dai Heng, Wenbo Liu, Yu Ding, Yanzhou Yang, Cheng Zhang
Thyroid hormones (THs) play a critical role in the development of ovarian cells. Although the effects of THs on female reproduction are of great interest, the mechanism remains unclear. We investigated the effects of TH dysregulation on reproductive hormones in rats. Propylthiouracil (PTU) and L-thyroxine were administered to rats to induce hypo- and hyper-thyroidism, respectively, and the reproductive hormone profiles were analyzed by radioimmunoassay. Ovarian histology was evaluated with H&E staining, and gene protein level or mRNA content was analyzed by western blotting or RT-PCR...
May 10, 2018: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/29739821/c-type-natriuretic-peptide-a-link-between-hyperandrogenism-and-anovulation-in-a-mouse-model-of-polycystic-ovary-syndrome
#13
Adelina M Reis, Kinulpe Honorato-Sampaio
The polycystic ovary (PCO) syndrome (PCOS) is the most common cause of anovulatory infertility in women and is associated with several clinical disorders. Despite the great amount of research in the area, mechanisms involved in the genesis of this syndrome remain poorly understood. In a recent issue of Clinical Science (vol. 132, issue 7, 759-776), Wang and colleagues, highlight the important role of overactivated C-type natriuretic peptide (CNP) and natriuretic peptide receptor 2 (CNP/NPR2) system in preventing oocyte maturation and ovulation in PCOS mice model induced by androgen...
May 16, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29738174/-hypospadias-induced-by-maternal-exposure-to-di-n-butyl-phthalate-and-its-mechanisms-in-male-rat-offspring
#14
En-Hui Li, Hai-Bin Wei, Bang-Gao Lhuangi, En-Hui Li, Qi Zhang, Zhi-Hui Xu, Da-Hong Zhang
Objective: To induce hypospadias in male rat offspring by maternal exposure to di-n-butyl phthalate (DBP) during late pregnancy and further investigate its mechanisms. METHODS: We randomly divided 20 pregnant rats into a DBP exposure and a control group, the former treated intragastrically with DBP while the latter with soybean oil at 750 mg per kilogram of the body weight per day from gestation days (GD) 14 to 18. On postnatal day (PND) 1, we recorded the incidence rate of hypospadias and observed the histopathological changes in the genital tubercle of the hypospadiac rats...
December 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29738159/-expression-characteristics-of-the-usp24-gene-in-the-mouse-testis-during-spermatogenesis
#15
Qi-Yi Hu, Qiong Deng, Jian-Wen Zhang, Fan Zhi, Rui Sun, Hui Liang
Objective: To investigate the expression characteristics of the USP24 gene in the mouse testis and its role in spermatogenesis. METHODS: We examined the expression characteristics of USP24 in the testis tissues of wild-type mice at different postnatal weeks (PNW) and androgen receptor (AR)-knockout (ARKO) adult mice using real-time quantitative PCR and immunofluorescence, and detected the transcriptional activity of the USP24 promoter by dual-luciferase reporter gene assay...
November 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29732458/hepatocellular-carcinoma-virilization-and-hilus-cell-hyperplasia-in-a-girl-with-turner-syndrome
#16
Jennifer R Law, Sang Lee, Eizaburo Sasatomi, Christine E Bookhout, Julie Blatt
Patients with Turner syndrome (TS) are known to be at risk for excess androgen production and virilization associated with gonadoblastoma and Y chromosome mosaicism, and excess androgens are a risk factor for the development of hepatocellular carcinoma. However, virilization and hepatocellular carcinoma have not been described in a patient with TS. A 10-year-old with nonmosaic 45,X TS presented with clitoromegaly, accelerated linear growth velocity, advanced bone age, and elevated testosterone levels as well as a second occurrence of hepatocellular carcinoma...
May 1, 2018: Journal of the Endocrine Society
https://www.readbyqxmd.com/read/29731413/finasteride-does-not-prevent-bladder-cancer-a-secondary-analysis-of-the-medical-therapy-for-prostatic-symptoms-study
#17
Niranjan J Sathianathen, Yunhua Fan, Stephanie L Jarosek, Nathan L Lawrentschuk, Badrinath R Konety
BACKGROUND: Preclinical models have demonstrated that androgen receptor modulation can influence bladder carcinogenesis with an inverse association observed between serum androgen levels and bladder cancer (BC) incidence. It is still unclear whether 5α-reductase inhibitors, by preventing the conversion of testosterone to dihydrotestosterone, have a similar effect. This study aims to evaluate whether dihydrotestosterone-mediated androgen activity has an impact on BC incidence in a cohort of men included in a clinical trial of finasteride vs...
May 3, 2018: Urologic Oncology
https://www.readbyqxmd.com/read/29729480/the-anti-androgenic-effect-of-chronic-exposure-to-semicarbazide-on-male-japanese-flounder-paralichthys-olivaceus-and-its-potential-mechanisms
#18
Zonghao Yue, Miao Yu, Xiaona Zhang, Jun Wang, Shaoguo Ru
Semicarbazide (SMC), a new marine pollutant, has anti-estrogenic effects on female Japanese flounder (Paralichthys olivaceus). However, whether SMC also affects the reproductive endocrine system of male marine organisms is currently unclear. In this study, Japanese flounder embryos were exposed to 1, 10, and 100 μg/L SMC for 130 days. Plasma testosterone (T) and 17β-estradiol (E2 ) concentrations were significantly decreased in male flounders after SMC exposure. The expression of genes involved in T and E2 synthesis, including steroidogenic acute regulatory protein, cytochrome P450 11A1, 17α-hydroxylase, 17β-hydroxysteroid dehydrogenase and cytochrome P450 19A, was down-regulated in the gonads, which may explain the decrease in plasma sex hormones levels...
May 2, 2018: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29729005/can-the-positive-association-of-osteocalcin-with-testosterone-be-unmasked-when-the-preeminent-hypothalamic-pituitary-regulation-of-testosterone-production-is-impaired-the-model-of-spinal-cord-injury
#19
A Barbonetti, S D'Andrea, J Samavat, A Martorella, G Felzani, S Francavilla, M Luconi, F Francavilla
PURPOSE: Osteocalcin (OCN), released from the bone matrix during the resorption phase, in its undercarboxylated form, stimulates testosterone (T) biosynthesis in mouse and a loss-of-function mutation of its receptor was associated with hypergonadotropic hypogonadism in humans. Nevertheless, when population-based studies have explored the OCN-T association, conflicting results have been reported. Hypothesizing that the evidence of a positive association between OCN and T could have been hindered by the preeminent role of a well-functioning hypothalamus-pituitary axis in promoting T biosynthesis, we explored this association in men with chronic spinal cord injury (SCI), exhibiting high prevalence of non-hypergonadotropic androgen deficiency...
May 4, 2018: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29726656/-aerobic-exercise-improves-spermatogenesis-of-male-rats-results-of-itraq-based-proteomic-analysis-of-the-testis-tissue
#20
Yu-Ping Guo, En-Zhong Li, You-Jing Zhang, An-Li Wang
Objective: To investigate the effect of aerobic exercise on the spermatogenic function of male rats and screen out differentially expressed proteins related to spermatonesis-regulation by proteomic analysis. METHODS: We randomly divided 24 SD male rats into groups A (non-exercise control), B (exercise), and C (weight-bearing exercise), those in the latter two groups made to swim for 60 minutes a day and those in group C bearing a load 3% of the body weight, both 6 times a week for 9 weeks...
September 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
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