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https://www.readbyqxmd.com/read/29145418/testosterone-is-protective-against-impaired-glucose-metabolism-in-male-intrauterine-growth-restricted-offspring
#1
Suttira Intapad, John Henry Dasinger, Joel M Fahling, Miles A Backstrom, Barbara T Alexander
Placental insufficiency alters the intrauterine environment leading to increased risk for chronic disease including impaired glucose metabolism in low birth weight infants. Using a rat model of low birth weight, we previously reported that placental insufficiency induces a significant increase in circulating testosterone in male intrauterine growth-restricted offspring (mIUGR) in early adulthood that is lost by 12 months of age. Numerous studies indicate testosterone has a positive effect on glucose metabolism in men...
2017: PloS One
https://www.readbyqxmd.com/read/29139646/physical-fitness-and-digit-ratio-2d-4d-in-male-students-from-wroc%C3%A5-aw-poland
#2
Slawomir Koziel, Marek Kociuba Mail, Raja Chakraborty, Zofia Ignasiak
There is sex-difference in humans as regards aerobic efficiency, physical strength and endurance and the sex difference is greatly dependent upon differential concentration of testosterone during different phases of growth and development including the intrauterine phase or prenatal growth. Second-to-fourth digit lengths ratio (2D:4D) is an putative indicator of prenatal testosterone exposure. Lower 2D:4D indicates higher prenatal testosterone exposure and vice versa. Males generally have lower 2D:4D than females...
March 2017: Collegium Antropologicum
https://www.readbyqxmd.com/read/29134985/effects-of-unripe-musa-paradisiaca-on-the-histochemistry-of-the-testis-and-testosterone-levels-in-adult-albino-rats
#3
A S Alabi, G O Omotosho, C N B Tagoe, O B Akinola, B U Enaibe
This study was aimed at determining the effects of the unripe fruit of Musa paradisiaca on the testis andtestosterone levels in male Wistar rats. The animals were grouped into three, comprising a control, and 2 treatment groupsadministered with different doses (500 mg/kg and 1000 mg/kg) daily of the fruit flour over 28 days. Histochemical evaluationof the testes was done using Haematoxylin and Eosin, Periodic acid Schiff's (PAS) and Feulgen staining techniques, whilethe serum and homogenised testicular tissue were evaluated for testosterone levels using Accu-Bind ELISA Kit...
June 30, 2017: Nigerian Journal of Physiological Sciences: Official Publication of the Physiological Society of Nigeria
https://www.readbyqxmd.com/read/29133315/testosterone-in-advance-age-a-new-zealand-longitudinal-cohort-study-life-and-living-in-advanced-age-te-pu%C3%A4-waitanga-o-ng%C3%A4-tapuwae-kia-ora-tonu
#4
Martin J Connolly, Ngaire Kerse, Tim Wilkinson, Oliver Menzies, Anna Rolleston, Yih Harng Chong, Joanna B Broad, Simon A Moyes, Santosh Jatrana, Ruth Teh
OBJECTIVES: Serum testosterone (T) levels in men decline with age. Low T levels are associated with sarcopenia and frailty in men aged >80 years. T levels have not previously been directly associated with disability in older men. We explored associations between T levels, frailty and disability in a cohort of octogenarian men. SETTING: Data from all men from Life and Living in Advanced Age Cohort Study in New Zealand, a longitudinal cohort study in community-dwelling older adults...
November 12, 2017: BMJ Open
https://www.readbyqxmd.com/read/29130715/relationship-of-long-term-macronutrients-intake-on-anabolic-catabolic-hormones-in-female-elite-volleyball-players
#5
Juan Mielgo Ayuso, Michael C Zpurdos, Aritz Urdampilleta, Julio Calleja González, Jesús Seco, Alfredo Córdova
INTRODUCTION: Specific macronutrient distribution and training can alter acute and chronic hormone behavior and, subsequently, sport performance. OBJECTIVE: The main aim was to examine relationships between dietary intake and anabolic/catabolic hormone response in elite female volleyball players during a 29-week season. METHODS: Twenty-two elite female volleyballers (26.4 ± 5.6 years; 178 ± 9 cm; 67.1 ± 7.5 kg) had dietary intake (seven-day dietary recall and food frequency questionnaire), blood concentration of anabolic/catabolic hormones concentration, physical performance, and body composition assessed at four time points: a) T1: baseline/pre-testing; b) T2: eleven weeks after T1; c) T3: ten weeks after T2; and d) T4: eight weeks after T3...
October 24, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29128547/associations-between-asymmetric-dimethylarginine-adma-nitrite-dependent-renal-carbonic-anhydrase-activity-and-plasma-testosterone-levels-in-hypogonadal-men
#6
Dimitrios Tsikas, Manfred Kinzel
BACKGROUND: Circulating inorganic nitrite (NO2(-)) is an abundant nitric oxide (NO) reservoir. Renal carbonic anhydrase (CA) mediates the absorption of urinary nitrite. The urinary nitrate-to-nitrite molar ratio UNOxR is a measure of nitrite-dependent renal CA activity. The CA family is also involved in the bioactivation of nitrite to S-nitrosothiols and NO. Thus, CA isoforms may combat atherosclerosis. METHODS: In plasma and urine of ten hypogonadal men we measured the major NO metabolites nitrite and nitrate, and the endogenous inhibitor of NO synthase (NOS) asymmetric dimethylarginine (ADMA) before and after a 24-weeks testosterone treatment to normalize plasma testosterone levels...
November 8, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/29128270/low-serum-testosterone-in-outpatient-psychiatry-clinics-addressing-challenges-to-the-screening-and-treatment-of-hypogonadism
#7
REVIEW
Justin B Smith, Jordan Rosen, Adam Colbert
INTRODUCTION: The symptoms of low testosterone frequently overlap with psychiatric complaints including depression and fatigue. Testosterone repletion has been shown to improve mood symptoms in men with low testosterone, although this finding has not been consistent across all studies. Despite the potential importance of low testosterone for psychiatry, the prevalence of low testosterone in men who present to psychiatric clinics with mental health complaints is unknown. AIM: To provide an overview of the current state of knowledge of the psychiatric complications of male hypogonadism, the challenges of screening for hypogonadism in a psychiatric population, and the potential mental health treatment implications of hypogonadism...
November 8, 2017: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/29126837/antiandrogens-reduce-intratumoral-androgen-concentrations-and-induce-androgen-receptor-expression-in-castration-resistant-prostate-cancer-xenografts
#8
Matias Knuuttila, Arfa Mehmood, Riikka Huhtaniemi, Emrah Yatkin, Merja R Häkkinen, Riikka Oksala, Teemu D Laajala, Henrik Ryberg, David J Handelsman, Tero Aittokallio, Seppo Auriola, Claes Ohlsson, Asta Laiho, Laura L Elo, Petra Sipilä, Sari I Mäkelä, Matti Poutanen
The development of castration-resistant prostate cancer (CRPC) is associated with the activation of intratumoral androgen biosynthesis and an increase in androgen receptor (AR) expression. We recently demonstrated that similarly to the clinical CRPC, orthotopically grown castration-resistant VCaP (CR-VCaP) xenografts express high levels of AR and retain intratumoral androgen concentrations similar to tumors grown in intact mice. Here, we show that antiandrogen treatment (enzalutamide or ARN-509) significantly reduced (10-fold, P < 0...
November 7, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29122541/the-simultaneous-measurement-of-serum-testosterone-and-5%C3%AE-dihydrotestosterone-by-gas-chromatography-mass-spectrometry-gc-ms
#9
Frank Kannenberg, Manfred Fobker, Erhard Schulte, Grzegorz Pierściński, Reinhard Kelsch, Michael Zitzmann, Jerzy-Roch Nofer, Andreas N Schüring
BACKGROUND: Simultaneous measurement of testosterone (T) and 5α-dihydrotestosterone (DHT) is important for diagnosing androgen deficiency states and hyperandrogenism in males and females, respectively. However, immunoassays used for T and DHT determination suffer from inadequate specificity and sensitivity, while tandem mass spectrometry is expensive and demanding in use. METHODS AND RESULTS: We developed a selective gas chromatography-mass spectrometry (GC-MS) method for parallel T and DHT measurement...
November 6, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29112589/androgens-mediate-%C3%AE-adrenergic-vasorelaxation-impairment-via-adenylyl-cyclase
#10
O A López-Canales, M C Castillo-Hernández, H Vargas-Robles, A Rios, J S López-Canales, B Escalante
Cardiovascular disease development has been associated with gender differences, suggesting that sex hormones are implicated in vascular function and development of hypertension. Vascular tone comparison at different stages of rat growth represents a good model to study testosterone-related vascular response. We explored the role of testosterone in modulation of age-dependent impaired β-adrenergic vasodilation.The 3 week-old male Sprague-Dawley rats were sorted in 3 week-old rats without any manipulation and 3 week-old rats treated with testosterone...
October 31, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29110281/the-effect-of-vitamin-d-supplementation-in-combination-with-low-calorie-diet-on-anthropometric-indices-and-androgen-hormones-in-women-with-polycystic-ovary-syndrome-a-double-blind-randomized-placebo-controlled-trial
#11
S Jafari-Sfidvajani, R Ahangari, M Hozoori, H Mozaffari-Khosravi, H Fallahzadeh, A Nadjarzadeh
PURPOSE: Polycystic ovary syndrome (PCOS) is known as the most common endocrine disorder in reproductive age women. The aim of this studywas to evaluate the effects of vitamin D supplementation in combination with low-calorie diet on anthropometric indices, reproductive hormones and menstrual regularity in overweight and obese PCOS women. METHODS: In this randomized controlled clinical trial, 60 PCOS women with vitamin D insufficiency were randomly assigned to 12 weeks of either (1) weight-loss intervention + 50,000 IU/week oral vitamin D3 or (2) weight-loss intervention + placebo...
November 6, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29108365/a-3-year-observation-of-testosterone-deficiency-in-chinese-patients-with-chronic-heart-failure
#12
Ying Han, Weiju Sun, Guizhi Sun, Xiaolu Hou, Zhaowei Gong, Jing Xu, Xiuping Bai, Lu Fu
Testosterone deficiency is present in a certain proportion men with chronic heart failure (CHF). Low testosterone levels in American and European patients with CHF lead to the high mortality and readmission rates. Interestingly, this relationship has not been studied in Chinese patients. To this end, 167 Chinese men with CHF underwent clinical and laboratory evaluations associated with determinations of testosterone levels. Total testosterone (TT) levels and sex hormone-binding globulin were measured by chemiluminescence or immunoassays assays and free testosterone (FT) levels were calculated, Based upon results from these assays, patients were divided into either a low testosterone (LT; n = 93) or normal testosterone (NT; n = 74) group...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29106989/gonadal-hormones-affect-alcohol-drinking-but-not-cue-yohimbine-induced-alcohol-seeking-in-male-and-female-rats
#13
Megan L Bertholomey, Mary M Torregrossa
Alcohol use disorder (AUD) is a chronic, relapsing disease characterized by maladaptive patterns of alcohol drinking and seeking. Though sex differences exist in the etiology of AUD, much remains to be elucidated concerning the mechanisms underlying sex-related vulnerability to developing excessive alcohol-motivated behavior. While a large body of evidence points to an important role of circulating gonadal hormones in mediating cocaine reinforcement, findings are less consistent with respect to ethanol. Critically, the effects of gonadal hormones on the reinstatement of ethanol seeking, a model of "craving"-like behavior that reveals pronounced sex differences, has not yet been examined...
October 26, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29105668/-testosterone-replacement-therapy-and-cardiovascular-risk
#14
Giovanni Corona, Mauro Dicuio, Giulia Rastrelli, Alessandra Sforza, Mario Maggi
Late onset hypogonadism (LOH) is the most commonly used term to indicate the age-dependent reduction of testosterone. Sexual dysfunction represents the most important determinant for medical consultation and the most specific symptoms associated with LOH. In particular, data from the European Male Ageing Study (EMAS), a population-based survey on more than 3400 subjects, recognized that a triad of sexual symptoms (low libido and reduced spontaneous and sex-related erections) is the only syndromic association with decreased testosterone levels...
November 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/29105496/a-helicobacter-pylori-associated-insulin-resistance-in-asymptomatic-sedentary-young-men-does-not-correlate-with-inflammatory-markers-and-urine-levels-of-8-iso-pgf2-%C3%AE-or-1-4-dihydroxynonane-mercapturic-acid
#15
Andriy Cherkas, Sergii Golota, Françoise Guéraud, Orest Abrahamovych, Christoph Pichler, Armen Nersesyan, Volodymyr Krupak, Vira Bugiichyk, Ostap Yatskevych, Mykhaylo Pliatsko, Peter Eckl, Siegfried Knasmüller
A potential contribution of H. pylori contamination to low-grade inflammation, oxidative stress (OS) and insulin resistance as well as correlations between these parameters in asymptomatic sedentary males was analysed. We enrolled 30 apparently healthy asymptomatic young subjects (18 H. pylori negative and 12 positive) and measured whole blood glucose, glycated haemoglobin, insulin, C-peptide, cortisol, aldosterone, testosterone, thyroid stimulating hormone, C-reactive protein, interleukins 6 and 10, TNF-alpha and comet assay...
November 6, 2017: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29103113/testicular-toxicity-and-sperm-quality-following-copper-exposure-in-wistar-albino-rats-ameliorative-potentials-of-l-carnitine
#16
Maurya Khushboo, Meesala Krishna Murthy, Maibam Sunita Devi, Sanasam Sanjeev, Kalibulla Syed Ibrahim, Nachimuthu Senthil Kumar, Vikas Kumar Roy, Guruswami Gurusubramanian
Copper is a persistent toxic and bio-accumulative heavy metal of global concern. Continuous exposure of copper compounds of different origin is the most common form of copper poisoning and in turn adversely altering testis morphology and function and affecting sperm quality. L-carnitine has a vital role in the spermatogenesis, physiology of sperm, sperm production and quality. This study was designed to examine whether the detrimental effects of long-term copper consumption on sperm quality and testis function of Wistar albino rat could be prevented by L-carnitine therapy...
November 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29101673/associations-between-clinically-diagnosed-testicular-hypofunction-and-systemic-lupus-erythematosus-a-record-linkage-study
#17
Julia Pakpoor, Raph Goldacre, Michael J Goldacre
Systemic lupus erythematosus (SLE) has a high female predominance with a 9:1 female-to-male sex ratio, but males have poorer clinical outcomes than females. Gonadal hormones may mediate gender differences in SLE, but their role in SLE remains largely uncharacterised. We aimed to investigate a potential association between testicular hypofunction (TH), as a proxy for low testosterone levels, and SLE in males. A retrospective cohort study was conducted by analysing linked English national Hospital Episode Statistics (HES) and mortality data from 1999 to 2011...
November 3, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/29097367/sex-chromosome-complement-defines-diffuse-versus-focal-angiotensin-ii-induced-aortic-pathology
#18
Yasir Alsiraj, Sean E Thatcher, Eric Blalock, Bradley Fleenor, Alan Daugherty, Lisa A Cassis
OBJECTIVE: Aortic pathologies exhibit sexual dimorphism, with aneurysms in both the thoracic and abdominal aorta (ie, abdominal aortic aneurysm [AAA]) exhibiting higher male prevalence. Women have lower prevalence of aneurysms, but when they occur, aneurysms progress rapidly. To define mechanisms for these sex differences, we determined the role of sex chromosome complement and testosterone on the location and progression of angiotensin II (AngII)-induced aortic pathologies. APPROACH AND RESULTS: We used transgenic male mice expressing Sry on an autosome to create Ldlr (low-density lipoprotein receptor)-deficient male mice with an XY or XX sex chromosome complement...
November 2, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29095270/pituitary-insufficiency-following-traumatic-thoracic-injury-in-an-adolescent-male-patient-a-case-report-and-literature-review
#19
REVIEW
Aleksandra Gilis-Januszewska, Łukasz Kluczyński, Małgorzata Wilusz, Jacek Pantofliński, Renata Turek-Jabrocka, Dorota Pach, Alicja Hubalewska-Dydejczyk
RATIONALE: Traumatic thoracic injuries in adolescents are rare but could be connected with traumatic brain injuries (TBI) and development of chronic hypopituitarism. Early recognition of these endocrine problems is a significant challenge to clinicians. We present difficulties in diagnosis of hypothalamic-pituitary insufficiency following traumatic thoracic injury in adolescence. We also review the literature of similar cases. PATIENT CONCERNS: We present a case of a 24-years-old male...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29090684/neuroactive-steroids-and-affective-symptoms-in-women-across-the-weight-spectrum
#20
Laura E Dichtel, Elizabeth A Lawson, Melanie Schorr, Erinne Meenaghan, Margaret Lederfine Paskal, Kamryn T Eddy, Graziano Pinna, Marianela Nelson, Ann M Rasmusson, Anne Klibanski, Karen K Miller
3α-5α-Tetrahydroprogesterone, a progesterone metabolite also known as allopregnanolone, and 5α-androstane-3α,17β-diol, a testosterone metabolite also known as 3α-androstanediol, are neuroactive steroids and positive GABAA receptor allosteric modulators. Both anorexia nervosa (AN) and obesity are complicated by affective co-morbidities and hypothalamic-pituitary-gonadal dysregulation. However, it is not known whether neuroactive steroid levels are abnormal at the extremes of the weight spectrum. We hypothesized that serum allopregnanolone and 3α-androstanediol levels would be decreased in AN compared to healthy controls (HC) and negatively associated with affective symptoms throughout the weight spectrum, independent of body mass index (BMI)...
November 1, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
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