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Testosterone deficiency

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https://www.readbyqxmd.com/read/29245176/high-risk-of-hypogonadism-in-young-male-cancer-survivors
#1
S Isaksson, K Bogefors, O Ståhl, J Eberhard, Y Lundberg Giwercman, I Leijonhufvud, K Link, I Øra, P Romerius, J Bobjer, A Giwercman
OBJECTIVE: Cancer and its treatment in childhood and young adulthood can cause hypogonadism, leading to increased risk of long term morbidity and mortality. The aim of this study was to evaluate the risk of presenting with biochemical signs of hypogonadism in testicular cancer survivors (TCS) and male childhood cancer survivors (CCS) in relation to the type of treatment given. DESIGN: Case-control study. PATIENTS: Ninety-two TCS, 125 CCS (mean age 40 and median age 34 years, respectively; mean follow-up time 9...
December 15, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29235134/sex-hormone-binding-globulin-is-associated-with-androgen-deficiency-features-independently-of-total-testosterone
#2
Giulia Rastrelli, Giovanni Corona, Sarah Cipriani, Edoardo Mannucci, Mario Maggi
OBJECTIVE: It is recognized that total testosterone (TT) does not sufficiently describe androgen status when sex hormone binding globulin (SHBG) is altered. However, in humans, evidence supporting the existence of a hypogonadism due to low T bioactivity is scanty. The aim of the study was to assess whether changes in SHBG levels, independently of TT, are associated with subjective and objective androgen dependent parameters. DESIGN: Cross-sectional observation. PATIENTS: 2622 men (aged 51...
December 13, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29233816/testosterone-level-and-risk-of-type-2-diabetes-in-men-a-systematic-review-and-meta-analysis
#3
Qiuming Yao, Bin Wang, Xiaofei An, Jin-An Zhang, Liumei Ding
BACKGROUND: Type 2 diabetes is a risk factor for testosterone deficiency and impaired sex steroid status. Some studies also investigated the association of testosterone level with diabetes risk in men, but reported controversial findings. To clarify this issue, we conducted a systematic review and meta-analysis. METHODS: Pubmed, Embase, and Web of Science were searched for eligible cohort or nested case-control studies published up to August 15, 2017. Meta-analysis was used to calculate the pooled relative risk (RR) of type 2 diabetes associated with higher testosterone level...
December 12, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29224109/testosterone-therapy-and-glucose-homeostasis-in-men-with-testosterone-deficiency-hypogonadism
#4
Farid Saad
Since the early 1990s, it has been recognized that testosterone (T) levels are lower in men with type 2 diabetes mellitus (T2DM) compared with nondiabetic men (controls). Hypogonadism has been reported in approximately 50% of men with T2DM with robust correlations with measures of obesity, such as waist circumference and body mass index (BMI). In longitudinal studies, hypogonadism has been identified as a predictor of incident T2DM. Experimental withdrawal of T led to acute decreased insulin sensitivity, which can be reversed by normalization of T concentrations...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29224108/negative-impact-of-testosterone-deficiency-and-5%C3%AE-reductase-inhibitors-therapy-on-metabolic-and-sexual-function-in-men
#5
Abdulmaged M Traish
Androgens are steroid hormones with pleotropic and diverse biochemical and physiological functions, and androgen deficiency exerts a negative impact on human health. Testosterone (T) either directly or via its transformation into the more potent metabolite 5α-dihydrotestosterone (5α-DHT) or via aromatization into estradiol (E2) modulates important biochemical signaling pathways of human physiology and plays a critical role in the growth and/or maintenance of functions in a host of tissues and organs. T and 5α-DHT play an important role in regulating physiology of the muscle, adipose tissue, liver, bone, and central nervous system, as well as reproductive and sexual functions...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29216720/testosterone-replacement-therapy-trt-and-its-effect-on-bone-marrow-how-serious-is-it-and-is-there-a-true-polyglobulia
#6
M Levcikova, J Breza, J Luha, J Dubravicky, E Kovacova, J Fillo
INTRODUCTION: TRT in men with testosterone deficiency syndrome (TDS) had multiple positive effects and restore a quality of life of affected men. Polyglobulia is the most common dose-limiting adverse effect of TRT, but the mechanisms of TRT-mediated erythropoesis remain unclear. In this study, we evaluated long term haematological side effects of TRT: polyglobulia, elevated hemoglobin (Hb) and haematocrit (Ht). METHODS: In a cross-sectional descriptive study, the authors treated 69 men with TDS and the average age 59 years and the follow-up period 81...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29206779/concentration-range-of-serum-sex-steroids-in-normal-postmenopausal-women-and-those-with-diagnosis-of-vulvovaginal-atrophy
#7
Yuyong Ke, Alain Bélanger, Jean-Nicolas Simard, Renaud Gonthier, Céline Martel, Mario Vaillancourt, Fernand Labrie
OBJECTIVE: The aim of the study was to determine the range of serum sex-related steroids in normal postmenopausal women and in women of the same age with a diagnosis of vulvovaginal atrophy (VVA). METHODS: Validated mass spectrometry-based assays coupled to gas or liquid chromatography were used over a 10-year period for steroid measurements. Serum samples were obtained in up to 1,512 women aged 55 to 65 years. RESULTS: Serum estrone sulfate (E1S) and androsterone glucuronide (ADT-G), the main metabolites of estrogens and androgens, respectively, were 16...
December 4, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/29198592/can-tangier-disease-cause-male-infertility-a-case-report-and-an-overview-on-genetic-causes-of-male-infertility-and-hormonal-axis-involved
#8
Laura Stocchi, Emiliano Giardina, Luigia Varriale, Annalisa Sechi, Andrea Vagnini, Gianni Parri, Massimo Valentini, Maria Capalbo
Tangier disease is an autosomal recessive disorder caused by mutations in the ABCA1 gene and characterized by the accumulation of cholesteryl ester in various tissues and a near absence of high-density lipoprotein. The subject in this investigation was a 36-year-old Italian man with Tangier disease. He and his wife had come to the In Vitro Fertilization Unit, Pesaro Hospital (Azienda Ospedaliera Ospedali Riuniti Marche Nord) seeking help regarding fertility issues. The man was diagnosed with severe oligoasthenoteratozoospermia...
November 26, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29198510/does-calculated-free-testosterone-overcome-total-testosterone-in-protecting-from-sexual-symptom-impairment-findings-of-a-cross-sectional-study
#9
Luca Boeri, Paolo Capogrosso, Eugenio Ventimiglia, Walter Cazzaniga, Filippo Pederzoli, Donatella Moretti, Federico Dehò, Emanuele Montanari, Francesco Montorsi, Andrea Salonia
BACKGROUND: Although erectile dysfunction (ED) has been associated with low circulating total testosterone (TT) levels, the utility of free testosterone (FT) over TT is debatable. AIM: To assess the relative impact of low TT and low calculated FT (cFT) on androgen-related sexual symptoms in men with ED. METHODS: Data from 485 men were analyzed. Comorbidities were scored with the Charlson Comorbidity Index (CCI). Patients completed the International Index of Erectile Function (IIEF) and the Beck Inventory for Depression (BDI)...
December 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29198509/testosterone-deficiency-causes-endothelial-dysfunction-via-elevation-of-asymmetric-dimethylarginine-and-oxidative-stress-in-castrated-rats
#10
Tomoya Kataoka, Yuji Hotta, Yasuhiro Maeda, Kazunori Kimura
BACKGROUND: Testosterone is believed to mediate the penile erectile response by producing adequate nitric oxide; therefore, testosterone deficiency results in erectile dysfunction through decreased nitric oxide bioavailability. However, the mechanisms underlying endothelial dysfunction in testosterone deficiency remain unclear. AIM: To investigate the mechanism of endothelial dysfunction in a rat model of testosterone deficiency. METHODS: Rats were distributed into 3 groups: castrated (Cast), castrated and supplemented with testosterone (Cast + T), and sham (Sham)...
December 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29198507/british-society-for-sexual-medicine-guidelines-on-adult-testosterone-deficiency-with-statements-for-uk-practice
#11
REVIEW
Geoff Hackett, Michael Kirby, David Edwards, Thomas Hugh Jones, Kevan Wylie, Nick Ossei-Gerning, Janine David, Asif Muneer
BACKGROUND: Testosterone deficiency (TD) is an increasingly common problem with significant health implications, but its diagnosis and management can be challenging. AIM: To review the available literature on TD and provide evidence-based statements for UK clinical practice. METHODS: Evidence was derived from Medline, EMBASE, and Cochrane searches on hypogonadism, testosterone (T) therapy, and cardiovascular safety from May 2005 to May 2015...
December 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29194990/effect-of-testosterone-supplementation-on-nitroso-redox-imbalance-cardiac-metabolism-markers-and-s100-proteins-expression-in-the-heart-of-castrated-male-rats
#12
N Regouat, A Cheboub, M Benahmed, A Belarbi, F Hadj-Bekkouche
The aim of this study was to investigate the effects of castration and testosterone supplementation on nitroso-redox status, cardiac metabolism markers, and S100 proteins expression in the heart of male rats. 50 male Wistar rats were randomized into five groups with ten animals each: group 1: control intact (CON); group 2: sham operated (Sh-O); group 3: sesame oil-treated rats (S-oil); group 4: gonadoectomized (GDX); and group 5: gonadoectomized rats treated with testosterone (GDX-T) for 8 weeks. Our results showed myofibrillar weaving, apoptosis, inflammation, and fibrosis (as reflected by increased activity of MMP 9 and MMP 2) in the heart of gonadoectomized rats...
December 1, 2017: Andrology
https://www.readbyqxmd.com/read/29193847/genetic-loss-of-diazepam-binding-inhibitor-in-mice-impairs-social-interest
#13
A L Ujjainwala, C D Courtney, S G Rhoads, J S Rhodes, C A Christian
Neuropsychiatric disorders in which reduced social interest is a common symptom, such as autism, depression, and anxiety, are frequently associated with genetic mutations affecting GABAergic transmission. Benzodiazepine treatment, acting via GABAA receptors, improves social interaction in male mouse models with autism-like features. The protein diazepam binding inhibitor (DBI) can act as an endogenous benzodiazepine, but a role for DBI in social behavior has not been described. Here we investigated the role of DBI in the social interest and recognition behavior of mice...
November 28, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29186457/reproductive-hormone-levels-predict-changes-in-frailty-status-in-community-dwelling-older-men-european-male-ageing-study-prospective-data
#14
Agnieszka Swiecicka, Robert J A H Eendebak, Mark Lunt, Terence W O'Neill, György Bartfai, Felipe F Casanueva, Gianni Forti, Aleksander Giwercman, Thang S Han, Jolanta Slowikowska-Hilczer, Michael E J Lean, Neil Pendleton, Margus Punab, Dirk Vanderschueren, Ilpo T Huhtaniemi, Frederick C W Wu, Martin K Rutter
Context: Clinical sequelae of androgen deficiency share common features with frailty. Evidence supporting the role of androgens in the development of frailty is limited and conflicting. Objective: To determine associations between male reproductive hormones and prospective changes in frailty status. Design/ Setting: 4.3-year prospective cohort study of community-dwelling men participating in the European Male Ageing Study. Participants: 3369 men aged 40-79 from 8 European centres...
November 24, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29184806/polycystic-ovary-syndrome-in-adolescence-diagnostic-and-therapeutic-strategies
#15
REVIEW
Manmohan K Kamboj, Andrea E Bonny
Controversy continues about the underlying etiopathogenesis, diagnostic criteria, and recommendations for polycystic ovary syndrome (PCOS) in adolescents. Recent literature has recognized these deficiencies and evidence based expert recommendations have become more available. The purpose of this chapter is to offer primary care providers a practical understanding and approach to the diagnosis and treatment of PCOS in adolescents. Although the presence of polycystic ovary morphology (PCOM) is included as a key diagnostic criterion of PCOS in adults, it is currently not recommended for the diagnosis in adolescents...
October 2017: Translational pediatrics
https://www.readbyqxmd.com/read/29183872/endotoxin-initiated-inflammation-reduces-testosterone-production-in-men-of-reproductive-age
#16
Kelton Tremellen, Natalie McPhee, Karma Pearce, Sven Bedson, Manfred Schedlowski, Harald Engler
Inflammation, both acute and chronic is associated with testosterone deficiency, raising the possibility of a direct causal link. One potential trigger for inflammation in obese men is the passage of intestinal bacteria into the circulation due to a breakdown in mucosal barrier integrity. Recently we hypothesized that this endotoxin exposure may cause androgen deficiency in obese men. To test this hypothesis, we analysed the relationship between serum levels of lipopolysaccharide binding protein (LBP), an indirect measure of endotoxin exposure, against male reproductive hormones, inflammatory markers (CRP, IL-1β, IL-6, TNF-α) and adiposity in 75 men...
November 28, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29182666/gnrh-receptor-gene-mutations-in-adolescents-and-young-adults-presenting-with-signs-of-partial-gonadotropin-deficiency
#17
Johanna Hietamäki, Matti Hero, Elina Holopainen, Johanna Känsäkoski, Kirsi Vaaralahti, Anna-Pauliina Iivonen, Päivi J Miettinen, Taneli Raivio
Biallelic, partial loss-of-function mutations in GNRHR cause a wide spectrum of reproductive phenotypes from constitutional delay of growth and puberty to complete congenital hypogonadotropic hypogonadism. We studied the frequency of GNRHR, FGFR1, TAC3, and TACR3 mutations in nine adolescent and young adult females with clinical cues consistent with partial gonadotropin deficiency (stalled puberty, unexplained secondary amenorrhea), and describe phenotypic features and molecular genetic findings of monozygotic twin brothers with stalled puberty...
2017: PloS One
https://www.readbyqxmd.com/read/29181661/role-of-sertoli-and-leydig-cells-in-the-regulation-of-spermatogonial-stem-cell-and-development-of-reproductive-disorders-in-male-c57bl-6-mice-with-type-1-diabetes-mellitus
#18
E G Skurikhin, A V Pakhomova, O V Pershina, V A Krupin, N N Ermakova, E S Pan, A I Kudryashova, L A Ermolaeva, E S Khmelevskaya, V E Goldberg, V V Zhdanov, A M Dygai
Course administration streptozotocin to male C57Bl/6 mice induces a complex of symptoms typical of type 1 diabetes mellitus: hyperglycemia and insulin deficiency, focal inflammatory infiltration of the pancreas, destructive changes in the Langerhans islets, damage to the insular apparatus (reduced number of PDX1+ cells and insulin expression by the secreting cells). Male reproductive disorder are serious complications of type 1 diabetes mellitus. In "diabetic" mice, interstitial edema with inflammatory infiltration and microvascular disorders in the testicular tissue are observed, the number of endothelial precursors (CD45-/CD31+) and the total number and percentage of motile spermatozoa decreased, immature spermatogenic epithelium cells are desquamated of into the lumen of the tubules...
November 27, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29178359/elevated-luteinising-hormone-despite-normal-testosterone-levels-in-older-men-natural-history-risk-factors-and-clinical-features
#19
Robert J A H Eendebak, Tomas Ahern, Agnieszka Swiecicka, Stephen R Pye, Terence W O'Neill, Bartfai Gyorgy, Felipe F Casanueva, Mario Maggi, Gianni Forti, Aleksander Giwercman, Thang S Han, Jolanta Słowikowska-Hilczer, Michael E J Lean, Margus Punab, Neil Pendleton, Brian G Keevil, Dirk Vanderschueren, Martin K Rutter, Gindo Tampubolon, Royston Goodacre, Ilpo T Huhtaniemi, Frederick C W Wu
OBJECTIVE: Elevated LH with normal testosterone (T) suggests compensated dysregulation of the gonadal axis. We describe the natural history, risk factors and clinical parameters associated with the development of high LH (HLH, LH>9.4 U/L) in ageing men with normal T (T≥10.5 nmol/L). DESIGN, PATIENTS AND MEASUREMENTS: We conducted a 4.3 year prospective observational study of 3,369 community-dwelling European men aged 40-79 years. Participants were classified as: incident (i) HLH (n=101, 5...
November 27, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29169749/comprehensive-assessment-of-sex-hormones-in-takotsubo-syndrome
#20
Christian Möller, Thomas Stiermaier, Georg Brabant, Tobias Graf, Holger Thiele, Ingo Eitel
BACKGROUND: The detailed pathomechanism of Takotsubo syndrome (TS) is still elusive. Due to the predominance of postmenopausal females, a potential role of sex hormones has been suggested. However, the limited available data are contradictory. The aim of this study was to comprehensively assess the role of sex hormone levels in a large cohort of TS patients. METHODS: Serum samples of 57 female TS patients and 57 female patients with myocardial infarction (MI), matched for age (±2years) and repolarization disturbances were analyzed for estradiol (E2), estrone (E1), testosterone and androstenedione using liquid chromatography-tandem mass spectrometry...
January 1, 2018: International Journal of Cardiology
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