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Testosterone replacement therapy

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https://www.readbyqxmd.com/read/28548282/estimating-the-effect-of-immortal-time-bias-in-urologic-research-a-case-example-of-testosterone-replacement-therapy
#1
Christopher J D Wallis, Refik Saskin, Steven A Narod, Calvin Law, Girish S Kulkarni, Arun Seth, Robert K Nam
OBJECTIVE: To quantify the effect of immortal-time bias in an observational study examining the effect of cumulative testosterone exposure on mortality. SUBJECTS AND METHODS: We used a population-based matched cohort study of men aged 66 and older newly treated with testosterone replacement therapy and matched-controls from 2007-2012 in Ontario, Canada to quantify the effects of immortal-time bias. We used generalized estimating equations to determine the association between cumulative testosterone replacement therapy exposure and mortality...
May 26, 2017: BJU International
https://www.readbyqxmd.com/read/28544654/hypogonadism-in-testicular-cancer-patients-is-associated-with-risk-factors-of-cardiovascular-disease-and-the-metabolic-syndrome
#2
C Bogefors, S Isaksson, J Bobjer, M Kitlinski, I Leijonhufvud, K Link, A Giwercman
More than 95% of testicular cancer are cured but they are at increased long-term risk of cardiovascular disease. The risk of cardiovascular disease and treatment intensity was reported, but it is unknown whether this effect of cancer therapy is direct or indirect, mediated through androgen deficiency. Our aim was, therefore, to evaluate whether testicular cancer patients have increased the prevalence of risk factors of cardiovascular disease and if these risk factors are associated with hypogonadism and/or the cancer treatment given...
May 23, 2017: Andrology
https://www.readbyqxmd.com/read/28540225/testosterone-deficiency-in-adults-and-corresponding-treatment-patterns-across-the-globe
#3
REVIEW
James Anaissie, Kent J DeLay, William Wang, Georgios Hatzichristodoulou, Wayne J Hellstrom
The global prevalence of testosterone deficiency (TD) ranges from 10-40%. The actual diagnosis of TD is controversial, as a wide range of total testosterone (TT) thresholds are used for diagnosis (200-400 ng/dL), and physicians differ in their emphasis placed on clinical symptoms. There are also significant global differences in the prescription patterns of testosterone replacement therapy (TRT). In the United States, prescription of TRT is significantly higher than the rest of the world, increasing 3-fold over the last 10 years and more so in eugonadal men...
April 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28522646/mr-spectroscopy-of-hepatic-fat-and-adiponectin-and-leptin-levels-during-testosterone-therapy-in-type-2-diabetes-a-randomized-double-blinded-placebo-controlled-trial
#4
Line Velling Magnussen, Poul Erik Andersen, Anabel Diaz, Jelena Markovic Ostojic, Kurt Højlund, David M Hougaard, Anders Nymark Christensen, Torben Leo Nielsen, Marianne Skovsager Andersen
BACKGROUND: Men with type 2 diabetes mellitus (T2D) often have lowered testosterone levels and an increased risk of cardiovascular disease (CVD). Ectopic fat increases the risk of CVD, whereas subcutaneous gluteofemoral fat protects against CVD and has a beneficial adipokine secreting profile. HYPOTHESIS: Testosterone replacement therapy (TRT) may reduce the content of ectopic fat and improve the adipokine profile in men with T2D. DESIGN AND METHODS: A randomized, double-blinded, placebo-controlled study in 39 men aged 50-70 years with T2D and bioavailable testosterone levels <7...
May 18, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28508601/effects-of-anorexia-nervosa-on-the-endocrine-system
#5
Charumathi Baskaran, Madhusmita Misra, Anne Klibanski
Anorexia nervosa (AN) is characterized by severe undernutrition associated with alterations in multiple endocrine axes, which are primarily adaptive to the state of caloric deprivation. Hormonal changes include growth hormone (GH) resistance with low insulin like growth factor-1 (IGF-1) levels, hypothalamic hypogonadism, relative hypercortisolemia and changes in appetite regulating hormones, including leptin, ghrelin, and peptide YY. These alterations contribute to abnormalities in bone metabolism leading to low bone mass, impaired bone microarchitecture, and increased risk for fracture, and may also negatively impact cognition, emotions and mood...
March 2017: Pediatric Endocrinology Reviews: PER
https://www.readbyqxmd.com/read/28497912/testosterone-replacement-therapy-long-term-safety-and-efficacy
#6
REVIEW
Giovanni Corona, Alessandra Sforza, Mario Maggi
Recent position statements and guidelines have raised the distinction between a true and false, age-related hypogonadism (HG) or late-onset hypogonadism (LOH). The former is the consequence of congenital or acquired "organic" damage of the brain centers or of the testis. The latter is mainly secondary to age-related comorbidities and does not require testosterone (T) therapy (TTh). In addition, concerns related to cardiovascular (CV) safety have further increased the scepticism related to TTh. In this paper, we reviewed the available evidence supporting the efficacy of TTh in non-organic HG and its long term safety...
April 30, 2017: World Journal of Men's Health
https://www.readbyqxmd.com/read/28497534/effects-of-testosterone-replacement-therapy-on-metabolic-syndrome-among-japanese-hypogonadal-men-a-subanalysis-of-a-prospective-randomised-controlled-trial-earth-study
#7
K Shigehara, H Konaka, T Nohara, K Izumi, Y Kitagawa, Y Kadono, T Iwamoto, E Koh, A Mizokami, M Namiki
We investigated the effects of testosterone replacement therapy (TRT) on metabolic factors among hypogonadal men with a metabolic syndrome. From the study population of the EARTH study, which was a randomised controlled study in Japan, 65 hypogonadal patients with a metabolic syndrome, comprising the TRT group (n = 32) and controls (n = 33), were included in this study analysis. The TRT group was administered 250 mg of testosterone enanthate as an intramuscular injection every 4 weeks for 12 months...
May 12, 2017: Andrologia
https://www.readbyqxmd.com/read/28495834/testosterone-therapy-for-menopausal-women
#8
(no author information available yet)
It has been suggested that there is a link between low circulating concentrations of testosterone and reduced sexual functioning in postmenopausal women,(1) and it has been more than 60 years since the effects of testosterone therapy for the management of menopausal symptoms were first reported.(2) Since then, testosterone supplementation has received growing attention for its potential role in maintaining sexual function in menopausal women. The National Institute for Health and Care Excellence guideline on the diagnosis and management of menopause recommends considering testosterone supplementation for women with low sexual desire if hormone replacement therapy (HRT) alone has been ineffective...
May 2017: Drug and Therapeutics Bulletin
https://www.readbyqxmd.com/read/28487389/normalization-of-testosterone-levels-after-testosterone-replacement-therapy-is-associated-with-decreased-incidence-of-atrial-fibrillation
#9
Rishi Sharma, Olurinde A Oni, Kamal Gupta, Mukut Sharma, Ram Sharma, Vikas Singh, Deepak Parashara, Surineni Kamalakar, Buddhadeb Dawn, Guoqing Chen, John A Ambrose, Rajat S Barua
BACKGROUND: Atrial fibrillation (AF) is the most common cardiac dysrhythmia associated with significant morbidity and mortality. Several small studies have reported that low serum total testosterone (TT) levels were associated with a higher incidence of AF. In contrast, it is also reported that anabolic steroid use is associated with an increase in the risk of AF. To date, no study has explored the effect of testosterone normalization on new incidence of AF after testosterone replacement therapy (TRT) in patients with low testosterone...
May 9, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28487215/micturition-dysfunction-in-four-month-old-ovariectomized-rats-effects-of-testosterone-replacement
#10
Sandra M Bonilla-Becerra, Mariana G de Oliveira, Fabiano B Calmasini, Julio A Rojas-Moscoso, Angelina Zanesco, Edson Antunes
AIMS: Androgen deficiency has been implicated in urological complications of postmenopausal women. This study examined the effects of testosterone replacements on the lower urinary tract dysfunction in 4-month old ovariectomized (OVX) rats. MAIN METHODS: Sprague-Dawley female rats were OVX bilaterally. Three months later, rats received single intramuscular injections of testosterone undecanoate. Cystometric study, and bladder and urethra smooth muscle reactivities were evaluated...
May 6, 2017: Life Sciences
https://www.readbyqxmd.com/read/28485412/science-and-society-testosterone-replacement-therapy-and-the-knowledge-gap
#11
Yooni A Yi, James M Dupree
No abstract text is available yet for this article.
May 9, 2017: Nature Reviews. Urology
https://www.readbyqxmd.com/read/28472914/low-testosterone-levels-and-metabolic-syndrome-in-aging-male
#12
Rodrigo Blaya, Patrícia Blaya, Luiza Rhoden, Ernani Luis Rhoden
Advances in medicine and progressive improvements in the health of the general population in developed countries have led to considerable increases in life expectancy over recent years. Metabolic syndrome (MetS) affects approximately 25% of the adult population and its prevalence is increasing all over the world. Central obesity plays an important role in emergence of MetS. Some studies have suggested that there may be link between low Total Testosterone levels and emergence of MetS. The objective of this review is to analyze the complex network of interactions between MetS and low testosterone levels in elderly men, considering etiologic, diagnostic, and therapeutic aspects...
May 3, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28472278/dihydrotestosterone-biochemistry-physiology-and-clinical-implications-of-elevated-blood-levels
#13
Ronald S Swerdloff, Robert E Dudley, Stephanie T Page, Christina Wang, Wael A Salameh
This review on dihydrotestosterone (DHT) biochemistry, physiology, and clinical implications of elevated levels in blood clarifies concepts that are important in clinical practice. Benefits associated with lowered serum DHT levels after 5α-reductase inhibitor (5AR-I) therapy in men have contributed to a misconception that circulating DHT levels are an important stimulus for androgenic action in target tissues (e.g., prostate). Yet evidence from clinical studies indicate that intracellular concentrations of androgens (particularly in androgen-sensitive tissues) are essentially independent of circulating levels...
May 2, 2017: Endocrine Reviews
https://www.readbyqxmd.com/read/28469921/gonadotrophin-abnormalities-in-an-infant-with-lowe-syndrome
#14
Bronwen E Warner, Carol D Inward, Christine P Burren
SUMMARY: This case, presenting with bilateral impalpable testes, illustrates the relevance of a broad differential disorders of sex development case management. It provides new insights on hypothalamic-pituitary-gonadal (HPG) axis and testicular function abnormalities in the multisystem disorder of Lowe syndrome. Lowe syndrome, also known as oculocerebrorenal syndrome, is a rare disorder characterised by eye abnormalities, central nervous system involvement and proximal renal tubular acidosis...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28459143/testosterone-deficiency-and-nocturia-a-review
#15
REVIEW
Kazuyoshi Shigehara, Koji Izumi, Atsushi Mizokami, Mikio Namiki
Nocturia causes lack of sleep and excessive daytime somnolence, reducing overall well-being, vitality, productivity, and mental health. Nocturia is significantly associated with testosterone deficiency, lower urinary tract symptoms (LUTS), and sleep disorders. The development of LUTS is commonly associated with testosterone deficiency in elderly men, and recent studies have suggested that testosterone has an ameliorative effect on nocturia. In hypogonadal men with nocturia, a negative feedback cycle can arise, in which testosterone deficiency leads to the development of nocturia, and nocturia contributes to the decline in testosterone levels...
April 2017: World Journal of Men's Health
https://www.readbyqxmd.com/read/28447913/testosterone-replacement-therapy-and-risk-of-favorable-and-aggressive-prostate-cancer
#16
Stacy Loeb, Yasin Folkvaljon, Jan-Erik Damber, Joseph Alukal, Mats Lambe, Pär Stattin
Purpose The association between exposure to testosterone replacement therapy (TRT) and prostate cancer risk is controversial. The objective was to examine this association through nationwide, population-based registry data. Methods We performed a nested case-control study in the National Prostate Cancer Register of Sweden, which includes all 38,570 prostate cancer cases diagnosed from 2009 to 2012, and 192,838 age-matched men free of prostate cancer. Multivariable conditional logistic regression was used to examine associations between TRT and risk of prostate cancer (overall, favorable, and aggressive)...
May 1, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28401578/dual-action-of-high-estradiol-doses-on-mnu-induced-prostate-neoplasms-in-a-rodent-model-with-high-serum-testosterone-protective-effect-and-emergence-of-unstable-epithelial-microenvironment
#17
Bianca F Gonçalves, Silvana G P de Campos, Rejane M Góes, Wellerson R Scarano, Sebastião R Taboga, Patricia S L Vilamaior
BACKGROUND: Estrogens are critical players in prostate growth and disease. Estrogen therapy has been the standard treatment for advanced prostate cancer for several decades; however, it has currently been replaced by alternative anti-androgenic therapies. Additionally, studies of its action on prostate biology, resulting from an association between carcinogens and estrogen, at different stages of life are scarce or inconclusive about its protective and beneficial role on induced-carcinogenesis...
June 2017: Prostate
https://www.readbyqxmd.com/read/28392474/novel-fsh%C3%AE-mutation-in-a-male-patient-with-isolated-fsh-deficiency-and-infertility
#18
Junjie Zheng, Jiangfeng Mao, Mingxuan Cui, Zhaoxiang Liu, Xi Wang, Shuyu Xiong, Min Nie, Xueyan Wu
Isolated follicle stimulating hormone (FSH) deficiency due to mutations in FSHβ is an extremely rare autosomal recessive disease that has only been reported in ten patients to date. Symptoms of the disease include amenorrhoea and hypogonadism in women and azoospermia and normal testosterone levels in men. This study describes a Chinese male patient who presented with cryptorchidism and infertility. His serum hormonal profile revealed low FSH, elevated LH and normal testosterone levels. Sequence analysis identified a novel homozygous mutation in the FSHβ gene (c...
June 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28379671/ten-cases-with-46-xx-testicular-disorder-of-sex-development-single-center-experience
#19
Emre Can Akinsal, Numan Baydilli, Abdullah Demirtas, Cetin Saatci, Oguz Ekmekcioglu
OBJECTIVE: To present clinical, chromosomal and hormonal features of ten cases with SRY-positive 46,XX testicular disorder of sex development who were admitted to our infertility clinic. CASES AND METHODS: Records of the cases who were admitted to our infertility clinic between 2004 and 2015 were investigated. Ten 46,XX testicular disorder of sex development cases were detected. Clinical, hormonal and chromosomal assessments were analized. RESULTS: Mean age at diagnosis was 30...
April 6, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28379662/the-prostate-after-castration-and-hormone-replacement-in-a-rat-model-structural-and-ultrastructural-analysis
#20
Bruno Felix-Patrício, Alexandre F Miranda, Jorge L Medeiros, Carla B M Gallo, Bianca M Gregório, Diogo B Souza, Waldemar S Costa, Francisco J B Sampaio
PURPOSE: To evaluate if late hormonal replacement is able to recover the prostatic tissue modified by androgenic deprivation. MATERIALS AND METHODS: 24 rats were assigned into a Sham group; an androgen deficient group, submitted to bilateral orchiectomy (Orch); and a group submitted to bilateral orchiectomy followed by testosterone replacement therapy (Orch+T). After 60 days from surgery blood was collected for determination of testosterone levels and the ventral prostate was collected for quantitative and qualitative microscopic analysis...
April 6, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
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