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https://www.readbyqxmd.com/read/28728135/prostate-cancer-risk-and-dna-methylation-signatures-in-aging-rats-following-developmental-bpa-exposure-a-dose-response-analysis
#1
Gail S Prins, Shu-Hua Ye, Lynn Birch, Xiang Zhang, Ana Cheong, Han Lin, Esther Calderon-Gierszal, Jacob Groen, Wen-Yang Hu, Shuk-Mei Ho, Richard B van Breemen
BACKGROUND: Previous studies have uncovered heightened prostatic susceptibility to hormone-induced neoplasia from early-life exposure to low-dose bisphenol A (BPA). However, significant data gaps remain that are essential to address for biological relevance and necessary risk assessment. OBJECTIVES: A complete BPA dose-response analysis of prostate lesions across multiple prostatic lobes was conducted that included internal BPA dosimetry, progression to adenocarcinoma with aging and mechanistic connections to epigenetically reprogramed genes...
July 11, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28725600/endogenous-and-exogenous-testosterone-and-prostate-cancer-decreased-increased-or-null-risk
#2
REVIEW
David S Lopez, Shailesh Advani, Konstantinos K Tsilidis, Run Wang, Steven Canfield
For more than 70 years, the contention that high levels of testosterone or that the use of testosterone therapy (TTh) increases the development and progression of prostate cancer (PCa) has been widely accepted and practiced. Yet, the increasing and emerging evidence on testosterone research seems to challenge that contention. To review literature on the associations of endogenous and exogenous testosterone with decreased-, increased-, or null-risk of PCa, and to further evaluate only those studies that reported magnitude of associations from multivariable modeling as it minimizes confounding effects...
June 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28723469/inflammation-microbiota-and-prostate-cancer
#3
REVIEW
Martin Puhr, Angelo De Marzo, William Isaacs, Marshall Scott Lucia, Karen Sfanos, Srinivasan Yegnasubramanian, Zoran Culig
CONTEXT: Chronic inflammation of the prostate has been associated with preneoplastic lesions and cancer development. Multiple causes have been considered for chronic inflammation of the prostate. Inflammatory cytokines such as interleukins are implicated in prostate carcinogenesis and development. OBJECTIVE: To evaluate literature published on etiological factors, urinary microbiota, morphological features of proliferative inflammatory atrophy and high-grade prostate intraepithelial neoplasia, genetic polymorphisms, inflammatory stress, and cytokine signaling...
October 2016: European Urology Focus
https://www.readbyqxmd.com/read/28721216/switch-to-restoration-therapy-in-a-testosterone-treated-central-hypogonadism-with-erythrocytosis
#4
B Cangiano, C Cacciatore, L Persani, M Bonomi
We describe a case of severe erythrocytosis caused by testosterone replacement therapy in a 66-year-old man affected with hypogonadotropic hypogonadism (HH) determining osteoporosis, resolved by switching to restoration therapy with clomiphene citrate. The patient complained fatigue, loss of libido and defective erections and a spontaneous vertebral fracture despite bisphosphonate therapy and vitamin D supplementation. The examinations proved isolated HH and he was therefore treated with testosterone gel with regression of specific manifestations but elevated hemoglobin and hematocrit values...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28721134/osteoporosis-in-men
#5
REVIEW
Waldemar Misiorowski
Osteoporotic fractures are the leading cause of morbidity and mortality among aging men. 30% of all hip fractures occur in men, and mortality resulting from not only the hip fracture, but also the spine and other major osteoporotic fractures, is significantly higher in men than in women. As in women, hypogonadism is the best documented risk factor for developing osteoporosis in men. In older men, testosterone levels are negatively correlated with the risk of fractures, and it seems that this age-related testosterone deficiency should not be considered as one of the many causes of secondary osteoporosis, rather one of the major and most important mechanisms of senile osteoporosis...
June 2017: Przeglad Menopauzalny, Menopause Review
https://www.readbyqxmd.com/read/28720108/early-pregnancy-sex-steroids-during-primiparous-pregnancies-and-maternal-breast-cancer-a-nested-case-control-study-in-the-northern-sweden-maternity-cohort
#6
Renée T Fortner, Eglé Tolockiene, Helena Schock, Husam Oda, Hans-Åke Lakso, Göran Hallmans, Rudolf Kaaks, Paolo Toniolo, Anne Zeleniuch-Jacquotte, Kjell Grankvist, Eva Lundin
BACKGROUND: Pregnancy and parity are associated with subsequent breast cancer risk. Experimental and epidemiologic data suggest a role for pregnancy sex steroid hormones. METHODS: We conducted a nested case-control study in the Northern Sweden Maternity Cohort (1975-2007). Eligible women had provided a blood sample in the first 20 weeks of gestation during a primiparous pregnancy leading to a term delivery. The current study includes 223 cases and 417 matched controls (matching factors: age at and date of blood collection)...
July 18, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28712059/a-combination-of-testosterone-and-white-blood-cell-count-as-a-predictive-factor-of-overall-survival-in-localized-prostate-cancer
#7
Daniel Taussky, Denis Souliéres, Laurent Azoulay, Hui Yin, Houda Bahig, Jean-Paul Bahary, Guila Delouya
BACKGROUND: It has been shown that neutrophil count or an elevated neutrophil-to-lymphocyte ratio (NLR) as well as testosterone levels are separately associated with increased mortality in patients with localized prostate cancer. OBJECTIVE: We tested a combination of testosterone levels and white blood cell (WBC) counts to predict overall survival (OS) in a prospective cohort of patients treated with radiotherapy for localized prostate cancer. PATIENTS AND METHODS: The 381 patients included in this study were prospectively enrolled in phase 2 or 3 studies...
July 15, 2017: Targeted Oncology
https://www.readbyqxmd.com/read/28711705/bmp15-in-catfish-testis-cellular-distribution-seasonal-variation-and-its-role-in-steroidogenesis
#8
Himanshu Yadav, Bechan Lal
Considering the absence of information on testicular growth factors in fishes, present study was aimed to elucidate the existence of BMP15, an important member of TGF-β superfamily, in the testis of a seasonally breeding freshwater catfish, Clarias batrachus and its role in regulation of testicular activities. The study demonstrated the expression of BMP15 in the somatic cells (Sertoli and interstitial cells) in fish testis. The expression varied with changing testicular activity; the expression was very high in the quiescent and early recrudescing testis coinciding with the renewal of spermatogonial cells...
July 12, 2017: Steroids
https://www.readbyqxmd.com/read/28708508/developmental-changes-in-the-histological-structure-of-the-testes-and-testosterone-profiles-in-male-guinea-fowls-numida-meleagris
#9
Iddriss I Abdul-Rahman, Frederick Y Obese, Ian A Jeffcoate
Owing to the paucity of information on the reproductive biology of guinea fowls, a study involving a total of 66 males was conducted, and documented the developmental changes in histological structure of the testes of guinea cocks from hatching until adulthood. Changes in testosterone synthesis during sexual development were also determined. Age-related changes were analysed using univariate analysis for completely randomised design and means separated using Tukey's test/Kruskal-Wallis test and medians separated by Mann-Whitney U test...
June 23, 2017: Theriogenology
https://www.readbyqxmd.com/read/28708305/a-novel-variant-of-dhh-in-a-familial-case-of-46-xy-disorder-of-sex-development-insights-from-molecular-dynamics-simulations
#10
Francoise Paris, Delphine Flatters, Sandrine Caburet, Bérangère Legois, Nadège Servant, Hervé Lefebvre, Charles Sultan, Reiner A Veitia
OBJECTIVE: Disorders of sex development (DSD) are a heterogeneous group of conditions affecting the differentiation and development of the internal and external genitalia. Here, we aimed at identifying the genetic cause of DSD in two 46,XY sisters from a consanguineous family. DESIGN: We performed a whole-exome sequencing of two 46,XY female individuals. Sanger sequencing was used to validate the most likely candidate variant, affecting the desert hedgehog (DHH) gene...
July 14, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28708126/the-effect-of-a-12-week-beta-hydroxy-beta-methylbutyrate-hmb-supplementation-on-highly-trained-combat-sports-athletes-a-randomised-double-blind-placebo-controlled-crossover-study
#11
Krzysztof Durkalec-Michalski, Jan Jeszka, Tomasz Podgórski
The aim of this study was to verify the effect of beta-hydroxy-beta-methylbutyrate (HMB) supplementation on physical capacity, body composition and the value of biochemical parameters in highly-trained combat sports athletes. Forty-two males highly-trained in combat sports were subjected to 12 weeks of supplementation with HMB and a placebo in a randomized, placebo controlled, double-blind crossover manner. Over the course of the experiment, aerobic and anaerobic capacity was determined, while analyses were conducted on body composition and levels of creatine kinase, lactate dehydrogenase, testosterone, cortisol and lactate...
July 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28706184/testosterone-promotes-either-dominance-or-submissiveness-in-the-ultimatum-game-depending-on-players-social-rank
#12
Yukako Inoue, Taiki Takahashi, Robert P Burriss, Sakura Arai, Toshikazu Hasegawa, Toshio Yamagishi, Toko Kiyonari
Endogenous testosterone promotes behaviours intended to enhance social dominance. However, recent research suggests that testosterone enhances strategic social behaviour rather than dominance seeking behaviour. This possibility has not been tested in a population whose members are known to vary in social status. Here, we explored the relationship between pre-existing social status and salivary testosterone level among members of a rugby team at a Japanese university, where a strong seniority norm maintains hierarchical relationships...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28704597/are-incident-gallstones-associated-to-sex-dependent-changes-with-age-a-cohort-study
#13
D M Shabanzadeh, S A Holmboe, L T Sørensen, A Linneberg, A-M Andersson, T Jørgensen
Age and female sex have repeatedly been identified as gallstone determinants but the underlying mechanisms are not clarified. The objectives of this study were to determine if changes with age in physiology, lifestyle, or reproductive hormones were associated with incident gallstones. A cohort study of a general population random sample (N = 2366) aged 30-60 years was performed. Participants were ultrasound screened for gallstones in 1982-84 and again in 1993-94. Lifestyle data and blood samples were obtained and re-analyzed in 2004...
July 13, 2017: Andrology
https://www.readbyqxmd.com/read/28704441/a-comparison-of-sex-steroid-concentration-levels-in-the-vitreous-and-serum-of-patients-with-vitreoretinal-diseases
#14
Yuko Nishikawa, Seita Morishita, Taeko Horie, Masanori Fukumoto, Takaki Sato, Teruyo Kida, Hidehiro Oku, Jun Sugasawa, Tsunehiko Ikeda, Kimitoshi Nakamura
The purpose of this study was to compare steroid hormone concentration levels in the vitreous and serum of vitreoretinal disease patients to elucidate the possibility of neurosteroid production in the retina. Serum and vitreous samples were collected from vitrectomy patients, and estradiol (E2) and testosterone (T) concentrations were measured using electro-chemiluminescence immunoassay. We measured E2 in epiretinal membrane (ERM, n = 14), macular hole (MH, n = 18), proliferative diabetic retinopathy (PDR, n = 20), and retinal detachment (RD, n = 19) cases, and T in ERM (n = 14), MH (n = 17), PDR (n = 13), and RD (n = 17) cases...
2017: PloS One
https://www.readbyqxmd.com/read/28703031/lower-circulating-migration-inhibitory-factor-protein-is-associated-with-metabolic-syndrome-and-diabetes
#15
Altan Onat, Evin Ademoğlu, Günay Can, Neslihan Çoban, Ayşem Kaya, Hüsniye Yüksel
AIM: The controversial relationship between macrophage migration inhibitory factor (MIF) and the likelihood of cardiometabolic diseases was investigated. Results/methodology: Assayed MIF protein from 1225 adults was cross-sectionally analyzed. MIF was independently inversely associated with age, total testosterone and positively with high-density lipoprotein-cholesterol. In men MIF correlation with age, testosterone and waist circumference converted from inverse in the upper to positive in the bottom MIF third...
July 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/28701734/long-noncoding-rna-expression-profile-changes-associated-with-dietary-energy-in-the-sheep-testis-during-sexual-maturation
#16
Yanli Zhang, Hua Yang, Le Han, Fengzhe Li, Tingting Zhang, Jing Pang, Xu Feng, Caifang Ren, Shengyong Mao, Feng Wang
Spermatogenesis can be affected by nutrition, which operates through normal physiological processes by changing the testicular mass and hormone levels profoundly. However, little is known regarding how testis development is regulated by long noncoding RNA (lncRNA). In this study, we investigated the effects of high-grain (HG) feeding on testis development during sexual maturation mediated by lncRNA. The HG diet group showed an increase in growth hormone (GH), insulin-like growth factor-1 (IGF-1) and testosterone (T) levels, and in the number of sperm in the seminiferous tubules compared with the hay-fed group (p  < 0...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700985/genes-involved-in-long-term-memory-are-expressed-in-testis-of-cryptorchid-boys-and-respond-to-gnrha-treatment
#17
Faruk Hadziselimovic, Katharina Gegenschatz-Schmid, Gilvydas Verkauskas, Philippe Demougin, Vytautas Bilius, Darius Dasevicius, Michael B Stadler
It has been known for many years that boys with unilateral or bilateral undescended testis (cryptorchidism) tend to have a low IQ, and those who belong to the high infertility risk (HIR) group perform less well at school than low infertility risk (LIR) patients. However, the molecular biological processes underlying this phenomenon are not understood. In this study, we report the outcome of testicular RNA profiling for genes involved in long-term memory formation. We analyzed the histology and the transcriptome of testicular biopsies from bilateral HIR cryptorchid boys, comparing those who received GnRHa treatment for 6 months after the first surgery with those who did not receive GnRHa before the second surgery...
July 13, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28699484/immune-response-to-native-lipoproteins-induces-visceral-obesity-and-aortic-wall-injury-in-rats-the-role-of-testosterone
#18
Kseniya Fomina, Liubov Beduleva, Igor Menshikov, Marina Marina Anikaeva, Daria Suntsova, Alexandr Sidorov, Elena Stolyarova
OBJECTIVES: The underlying mechanism of atherosclerosis and visceral obesity remains unknown. The purpose of this study was to test the hypothesis that atherosclerosis and visceral obesity are caused by an immune response to native plasma lipoproteins, and the atherogenic and adipogenic effects of the antibodies to native lipoproteins stem from the androgen deficiency that is created. METHODS: Wistar rats were immunized with native human (nh) low-density (LDL) or high-density lipoproteins (HDL)...
July 11, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28693284/%C3%AE-human-chorionic-gonadotropin-secreting-intracranial-germ-cell-tumor-associated-with-high-testosterone-in-an-adult-man-a-case-report
#19
Wen-Ping Yang, Hung-Yu Chien, Yi-Chun Lin
A 38-year-old male patient presented with general weakness, polydipsia and a body weight loss of 10 kg in two years. Hypopituitarism with central hypothyroidism and central adrenal insufficiency were noted at Taipei City Hospital (Taipei, Taiwan). However, hypogonadotropic hypergonadism was also observed. The patient was diagnosed with an intracranial β-human chorionic gonadotropin (β-hCG) secreting germ-cell tumor, and brain magnetic resonance imaging revealed that the tumor involved the pineal gland, stalk, posterior pituitary gland, right basal ganglion, hypothalamus, corpus callosum and posterior hippocampus...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28692609/human-semen-quality-sperm-dna-damage-and-the-level-of-reproductive-hormones-in-relation-to-urinary-concentrations-of-parabens
#20
Joanna Jurewicz, Michał Radwan, Bartosz Wielgomas, Emila Dziewirska, Anetta Karwacka, Anna Klimowska, Paweł Kałużny, Paweł Radwan, Michał Bochenek, Wojciech Hanke
OBJECTIVE: The aim of this study was to evaluate the association between environmental exposure to parabens and semen quality parameters [main semen parameters, computer-aided semen analysis (CASA parameters], sperm chromatin structure, and the level of reproductive hormones in men [follicle-stimulating hormone (FSH), testosterone, estradiol]. METHODS: Urine samples collected from 315 men who attended the infertility clinic for diagnostic purposes with normal semen concentration of 15 to 300 mln/mL were analyzed for five parabens concentrations using a validated gas chromatography ion-tap mass spectrometry method...
July 7, 2017: Journal of Occupational and Environmental Medicine
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