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Low testosterone

Craig F Garfield, Clarissa D Simon, Joshua Rutsohn, Young S Lee
Lower testosterone during the transition to new parenthood is considered beneficial to help parents better engage with their infants. No data currently exist studying salivary testosterone of parents with infants in neonatal intensive care units (NICUs) during the transition to home. We examine testosterone levels for parents of very low-birth-weight infants, including links between salivary testosterone and infant factors (such as breast-feeding), psychosocial stress, and changes over time.Testosterone salivary samples were assayed after self-collection by 86 parents (43 fathers and 43 mothers) with NICU infants at wakeup and bedtime prior to discharge and at 3 additional times at home...
October 2016: Journal of Perinatal & Neonatal Nursing
Paolo Capogrosso, Eugenio Ventimiglia, Marco Moschini, Luca Boeri, Elena Farina, Nadia Finocchio, Giorgio Gandaglia, Nicola Fossati, Alberto Briganti, Franscesco Montorsi, Andrea Salonia
BACKGROUND: Controversial results have shown a significant association with either low or high total testosterone (tT) levels and high risk prostate cancer (PCa). We tested the relationship between circulating tT and grade group 5 (G5) PCa at radical prostatectomy (RP) in patients with preoperative low- to intermediate-risk disease. METHODS: Serum sex hormones were assessed the day before RP in a cohort of 846 patients with low- to intermediate-risk PCa. Patients were segregated using the new 5-tiered Gleason grade groups...
October 24, 2016: Prostate
M C Lardone, F Argandoña, M Flórez, A Parada-Bustamante, M Ebensperger, C Palma, A Piottante, A Castro
Several observational studies have showed a combination of lower testosterone (T) to LH ratio and higher estradiol (E2 ) to T ratio in secretory infertile men compared to men with normal spermatogenesis, suggesting a steroidogenic dysfunction of Leydig cells (Lc) that may involve increased aromatase activity. Low T/LH ratio is associated with Lc hyperplasia, which together with LH hyperstimulation may represent compensation for impaired T production. Aromatase expression and oestrogen production are mainly detected in Lc of the testis, although Sertoli and germ cells also contribute to testicular aromatase activity...
October 21, 2016: Andrology
Charlotte Rombaut, Katrien Faes, Ellen Goossens
PURPOSE: Previous studies have shown that the removal of one testis leads to a compensatory mechanism in the contralateral one, but this was species and age dependent. The aim of this study was to check whether this compensation would still occur after the combination of a unilateral orchiectomy and gonadotoxic treatment, since this resembles the clinical situation of patients who have to undergo highly toxic cancer treatment and therefore choose to cryopreserve a testicular biopsy for fertility restoration purposes...
2016: PloS One
Stefano Salciccia, Alessandro Gentilucci, Susanna Cattarino, Alessandro Sciarra
On the basis of the trials available, are we ready to consider GnRH antagonists better than agonists? Is there a population of patients who may benefit from antagonists more than agonists?We specifically focused our analysis on the significance of oncological results obtained in phase III trials directly comparing Degarelix with GnRH agonists. Oncological results were evaluated only in 1 trial (CS21) with some subanalysis and they were not the primary endpoints of the study. The follow-up duration was 364 days, and therefore, the number of events (all causes deaths and prostate cancer (PC), Prostate Specific Antigen (PSA), Hazard ratio (HR)-related deaths) was very low in both groups and this aspect strongly reduces the significance of overall survival evaluation...
October 15, 2016: Urologia
Pawel Szulc, Ez Zoubir Amri, Annie Varennes, Patricia Panaia-Ferrari, Eric Fontas, Joëlle Goudable, Roland Chapurlat, Véronique Breuil
AIM: Oxytocin regulates food intake, carbohydrate and lipid metabolism, and urinary sodium excretion. We assessed the association between serum oxytocin levels and presence of metabolic syndrome (MetS) in older men. METHODS: Cross-sectional study was performed in 540 volunteer men aged 50-85yrs from the MINOS cohort. Oxytocin was measured in fasting serum by radioimmunoassay (Oxytocin RIA, Phoenix Pharmaceuticals). MetS was diagnosed using the harmonized definition...
October 1, 2016: Diabetes Research and Clinical Practice
Ari L Mendell, Carolyn E Creighton, Bettina E Kalisch, Neil J MacLusky
Low free testosterone levels in men are associated with age-related cognitive decline and increased risk for neurotoxicity, resulting in disease. The mechanisms underlying these observations remain poorly defined. While rapid, androgen receptor-dependent activation of extracellular signal-regulated kinase (ERK) has been postulated as a neurotrophic and neuroprotective mechanism, actions of testosterone metabolites such as 5α-androstane-3α,17β-diol (3α-diol) may also be involved. We investigated the influence of 3α-diol on the induction of ERK phosphorylation in SH-SY5Y human female neuroblastoma cells and primary cortical neurons from male and female mice...
October 18, 2016: Endocrinology
Riikka S K Takala, Riku Kiviranta, Klaus T Olkkola, Tero Vahlberg, Dan Laukka, Anna Kotkansalo, Melissa Rahi, Matti Sankinen, Jussi Posti, Ari Katila, Jaakko Rinne
PURPOSE: The aim was to assess anterior pituitary hormone levels during the acute phase of aneurysmal subarachnoid hemorrhage (aSAH) and analyze the possible association with the clinical condition and outcome. MATERIAL AND METHODS: Forty patients with aSAH whose aneurysm was secured by endovascular coiling were enrolled. Basal secretions of cortisol, testosterone, luteinizing hormone (LH), prolactin (PRL), and sex hormone binding globulin (SHBG) levels were measured up to 14 days after the incident...
October 18, 2016: Endocrine Research
Wioletta Pijacka, Bethan Clifford, Dawid Walas, Chantal Tilburgs, Jaap A Joles, Sarah McMullen, Simon C Langley-Evans
OBJECTIVE: It is well established that autonomic nervous system and sympatho-vagal balance plays an important role in maintaining arterial blood pressure (ABP) (Salman IM., 2016) and that autonomic regulation of ABP differs between males and females (Hart EC et al., 2014). We hypothesised that sex hormones affect blood pressure via the autonomic nervous system and that the late development of hypertension in females is due to protective effects of ovarian steroids in females rather than due to detrimental effects of testosterone in males...
September 2016: Journal of Hypertension
Eric S Orwoll, Jodi Lapidus, Patty Y Wang, Liesbeth Vandenput, Andrew Hoffman, Howard Fink, Gail A Laughlin, Maria Nethander, Östen Ljunggren, Andreas Kindmark, Mattias Lorentzon, Magnus Karlsson, Dan Mellström, Anthony Kwok, Sundeep Khosla, Timothy Kwok, Claes Ohlsson
Measurement of serum testosterone (T) levels is recommended in the evaluation of osteoporosis in older men and estradiol (E2) and sex hormone binding globulin (SHBG) levels are associated with the rate of bone loss and fractures, but the clinical utility of sex steroid and SHBG measurements for the evaluation of osteoporosis in men has not been examined. To evaluate whether measurements of T, E2 and/or SHBG are useful for the prediction of fracture risk or the rate of bone loss in older men, we analyzed longitudinal data from 5487 community-based men participating in the MrOS Study in the US, Sweden and Hong Kong...
October 18, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
G Caleb Alexander, Geetha Iyer, Eleanor Lucas, Dora Lin, Sonal Singh
PURPOSE: We sought to evaluate whether exogenous testosterone therapy is associated with increased risk of serious cardiovascular events as compared to other treatments or placebo. METHODS: Study selection included randomized controlled trials (RCTs) and observational studies which enrolled men aged 18 years or older receiving exogenous testosterone for three or more days were included. The primary outcomes were death due to all causes, myocardial infarction and stroke...
October 14, 2016: American Journal of Medicine
Giuseppe Loverro, Leonardo Resta, Miriam Dellino, Di Naro Edoardo, Maria Arcangela Cascarano, Matteo Loverro, Salvatore Andrea Mastrolia
OBJECTIVE: Female-to-male transition remains a specific clinical indication for long-term testosterone administration. There is a limited number of studies dealing with the effect of androgen treatment on their female receptive targets (mainly breast and uterus) and the knowledge in this field is scarce and, sometimes, contradictory. MATERIALS AND METHODS: We performed a prospective study including 12 patients aged between 20 years and 32 years, with a diagnosis of gender dysphoria, treated with parenteral testosterone administration before sexual reassignment surgery...
October 2016: Taiwanese Journal of Obstetrics & Gynecology
Yu Seob Shin, Jae Hyung You, Jai Seong Cha, Jong Kwan Park
OBJECTIVE: To investigate the relationship between serum total testosterone (TT) and free testosterone (FT) levels in men with anemia. METHODS: We reviewed the records of 1221 subjects between March 2009 and December 2014. All the subjects' blood samples were drawn for TT and FT assays. Their serum hemoglobin (Hb) and serum hematocrit (Hct) levels were measured. The primary objective of our study was to investigate the association between TT and FT levels with Hb and Hct levels...
October 18, 2016: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
Ryan Dean Fortune, Raymond J Grill, Christine Beeton, Mark Tanner, Redwan Huq, David S Loose
Spinal cord injury (SCI) results in devastating changes to almost all aspects of a patient's life. In addition to a permanent loss of sensory and motor function, males will also frequently exhibit a profound loss of fertility through poorly understood mechanisms. We demonstrate that SCI causes measureable pathology in the testis both acutely (24 hours) and chronically, up to 1.5 years post injury, leading to loss in sperm motility and viability. SCI has been shown in humans and rats to induce leukocytospermia, with the presence of inflammatory cytokines, anti-sperm antibodies, and reactive oxygen species found within the ejaculate...
October 18, 2016: Journal of Neurotrauma
Haolin Chen, Yiyan Wang, Renshan Ge, Barry R Zirkin
Adult Leydig cells develop from undifferentiated mesenchymal-like stem cells (stem Leydig cells, SLCs) present in the interstitial compartment of the early postnatal testis. Putative SLCs also have been identified in peritubular and perivascular locations of the adult testis. The latter cells, which normally are quiescent, are capable of regenerating new Leydig cells upon the loss of the adult cells. Recent studies have identified several protein markers to identify these cells, including nestin, PDGFRα, COUP-TFII, CD51 and CD90...
October 12, 2016: Molecular and Cellular Endocrinology
Al V Taira, Gregory S Merrick, Robert W Galbreath, Wayne M Butler, Edward Adamovich
OBJECTIVES: To evaluate whether the use of androgen deprivation therapy (ADT) in prostate brachytherapy patients impacts overall mortality (OM) in patients with lower pretreatment serum testosterone levels compared with those with normal or high baseline serum testosterone. MATERIALS AND METHODS: From October 2001 to May 2014, 1916 patients underwent brachytherapy and had a pretreatment serum testosterone. Baseline serum testosterone values were collected prospectively before initiation of therapy...
October 12, 2016: American Journal of Clinical Oncology
Tatiana Moro, Grant Tinsley, Antonino Bianco, Giuseppe Marcolin, Quirico Francesco Pacelli, Giuseppe Battaglia, Antonio Palma, Paulo Gentil, Marco Neri, Antonio Paoli
BACKGROUND: Intermittent fasting (IF) is an increasingly popular dietary approach used for weight loss and overall health. While there is an increasing body of evidence demonstrating beneficial effects of IF on blood lipids and other health outcomes in the overweight and obese, limited data are available about the effect of IF in athletes. Thus, the present study sought to investigate the effects of a modified IF protocol (i.e. time-restricted feeding) during resistance training in healthy resistance-trained males...
October 13, 2016: Journal of Translational Medicine
Luboslav Stárka
Subnormal levels of testosterone are frequently found in men of higher age category. Hypogonadal men have lower life expectancy than men with full androgenization and cardiovascular disease, obesity or diabetes is often associated with hypotestosteronemia. Low testosterone level is risk factor for these diseases. However, until now it is not clear whether testosterone deficiency is a cause or consequence of atherosclerosis or metabolic syndrome. A handful of symptoms and metabolic risk markers in hypogonadal men can be ameliorated by testosterone supplementation...
2016: Vnitr̆ní Lékar̆ství
Katherine N Bachmann, Melanie Schorr, Alexander G Bruno, Miriam A Bredella, Elizabeth A Lawson, Corey M Gill, Vibha Singhal, Erinne Meenaghan, Anu V Gerweck, Meghan Slattery, Kamryn T Eddy, Seda Ebrahimi, Stuart L Koman, James M Greenblatt, Robert J Keane, Thomas Weigel, Madhusmita Misra, Mary L Bouxsein, Anne Klibanski, Karen K Miller
CONTEXT: Areal BMD is lower, particularly at the spine, in low-weight women with anorexia nervosa (AN). However, little is known about vertebral integral volumetric BMD (Int.vBMD) or vertebral strength, across the AN weight spectrum, including "atypical" AN (BMI≥18.5 kg/m(2)). OBJECTIVE: To investigate Int.vBMD and vertebral strength, and their determinants, across the AN weight spectrum. DESIGN: Cross-sectional observational study Setting: Clinical Research Center Participants: 153 women (18-45y): 64 low-weight AN (BMI<18...
October 12, 2016: Journal of Clinical Endocrinology and Metabolism
Reshmi Srinath, Rebecca F Gottesman, Sherita Hill Golden, Kathryn A Carson, Adrian Dobs
BACKGROUND AND PURPOSE: Epidemiological studies in men suggest a relationship between endogenous testosterone and ischemic vascular events. We hypothesized that low testosterone is independently associated with ischemic stroke and ischemic brain changes. METHODS: In 1558 male participants (mean [SD] age, 63.1 [5.6] years; body mass index, 28.2 [4.3] kg/m(2)) from visit 4 (1996-1998) of the ARIC study (Atherosclerosis Risk in Communities) without cardiovascular disease, stroke, and previous testosterone therapy, we measured plasma total testosterone by liquid chromatography mass spectrometry using morning samples and divided levels into tertiles (median [25th-75th percentile], 377...
October 11, 2016: Stroke; a Journal of Cerebral Circulation
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