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Latest & greatest articles for testosterone
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Testosterone Treatment Testosterone Treatment -- Clinical Recommendation Welcome Search Search Specify your search AAFP.org Patient Care Clinical Practice Guideline(s) Testosterone Treatment Testosterone Treatment in Adult Men with Age-Related Low Testosterone (Endorsed, May 2019) The guideline, Testosterone Treatment in Adult Men with Age-Related Low Testosterone , was developed by the American College of Physicians and endorsed by the American Academy of Family Physicians. Key Recommendations (...) For individuals with age-related low testosterone and sexual dysfunction who want to improve sexual function, the decision to initiate testosterone therapy should occur following a discussion of the potential benefits, harms, costs, and patient's preferences. For individuals with age-related low testosterone and sexual dysfunction who decide to initiate testosterone therapy, symptoms should be reevaluated within 12 months and treatment should be discontinued when there is no improvement in sexual function
Testosterone reduces the threat premium in competitive resource division. Like other animals, humans are sensitive to facial cues of threat. Recent evidence suggests that we use this information to dynamically calibrate competitive decision-making over resources, ceding more to high-threat individuals (who appear more willing/able to retaliate) and keeping more from low-threat individuals. Little is known, however, about the biological factors that support such threat assessment and decision (...) -making systems. In a pre-registered, double-blind, placebo-controlled, cross-over testosterone administration study ( n = 118 men), we show for the first time that testosterone reduces the effects of threat on decision-making: participants ceded more resources to high-threat (versus low-threat) individuals (replicating the 'threat premium'), but this effect was blunted by testosterone, which selectively reduced the amount of resources ceded to those highest in threat. Thus, our findings suggest
Exogenous Testosterone Does Not Influence 11-Oxygenated C19 Steroid Concentrations in Healthy Postmenopausal Women. 11β-Hydroxyandrostenedione (11OHA4), 11β-hydroxytestosterone (11OHT), and their respective peripheral derivatives, 11-ketoandrostenedione (11KA4) and 11-ketotesosterone (11KT), have been implicated in androgen-related physiopathology. Little is known of these steroids in postmenopausal women or whether exogenous testosterone therapy influences their levels.The impact of exogenous (...) testosterone on serum levels of 11-oxygenated steroids was determined in healthy postmenopausal women.Levels of 19-carbon (C19) steroids were measured by liquid chromatography-tandem mass spectrometry in serum obtained at baseline and at 12 and 26 weeks from 73 healthy postmenopausal women, aged 55 to 65 years, who participated in a randomized, double-blind, placebo-controlled clinical trial assessing the effects of transdermal testosterone on cognitive performance.Of the 11-oxygenated androgens, 11OHA4
Feedback on LH in Testosterone-Clamped Men Depends on the Mode of Testosterone Administration and Body Composition. Quantitative studies of the short-term feedback of testosterone (T) on luteinizing hormone (LH) secretion in healthy men are relatively rare. Such studies require the shutting down of endogenous T secretion and the imposition of experimentally controlled IV T addback.To evaluate whether pulsatile and continuous T delivery confers equivalent negative feedback on LH secretion.This
Increase in Osteocalcin Following Testosterone Therapy in Men With Type 2 Diabetes and Subnormal Free Testosterone. One-third of men with type 2 diabetes have subnormal free testosterone concentrations. We evaluated the following: (i) whether bone mineral density (BMD) and bone strength are affected by gonadal status in type 2 diabetes and (ii) the effect of testosterone replacement on markers of osteoblast and osteoclast activity.This is a secondary analysis of a previously completed (...) , randomized, placebo-controlled trial. Ninety-four men with type 2 diabetes were recruited; 44 had subnormal free testosterone concentrations. Men with subnormal free testosterone concentrations were randomized to receive intramuscular injections of testosterone or placebo every 2 weeks for 22 weeks. Dual energy X-ray absorptiometry scans were performed at baseline and at 23 weeks.Men with subnormal free testosterone had similar BMD compared with men with normal free testosterone. However, bone strength
Cardiovascular benefits and risks of testosterone replacement therapy in hypogonadal men with type 2 diabetes mellitus and/or the metabolic syndrome: a systematic review Cardiovascular benefits and risks of testosterone replacement therapy in hypogonadal men with type 2 diabetes mellitus and/or the metabolic syndrome: a systematic review | Quang | British Journal of Diabetes User Username Password Remember me 5th Joint Meeting of ABCD & The Renal Association 24/25 February 2021 All issues 2014 (...) -present Browse Search All issues from 2014 Refine 2001-2013 at OR View listing of all 2001-2013 issues . Click on the issue you want to view it at About The Authors Le Minh Quang CARDIFF DIABETES CENTRE FV HOSPITAL Viet Nam DIABETOLOGIST SENIOR PHYSICIAN CONSULTANT Atul Kalhan South Wales University Royal Glamorgan Hospital United Kingdom Hosted By Part of the > > Cardiovascular benefits and risks of testosterone replacement therapy in hypogonadal men with type 2 diabetes mellitus and/or the metabolic
Does Testosterone Therapy Increase Risk of Cardiovascular Events among Men? A Meta-analysis Does Testosterone Therapy Increase Risk of Cardiovascular Events among Men? A Meta-analysis | Cardiology and Angiology: An International Journal Quick jump to page content Toggle navigation Search Original Research Article Published Nov 1, 2018 DOI     Page: 1-16 Main Article Content Nader Makki Department of Cardiovascular Medicine, Ohio State Wexner Medical Center, Columbus, OH 43210 (...) , USA Wassef Karrowni Department of Cardiovascular Medicine, UnityPoint Clinic - St. Luke’s Hospital, Cedar Rapids, Iowa, USA Abstract Importance: There has been increasing interest in use of testosterone therapy (TT) beyond patients with hypogonadism to include younger men without documented hormone measurements for the purpose of improving libido, sexual function, bone density, and body mass. However, there is no conclusive data about safety of TT due to lack of adequately powered randomized
Multi-year patterns in testosterone, cortisol and corticosterone in baleen from adult males of three whale species Male baleen whales have long been suspected to have annual cycles in testosterone, but due to difficulty in collecting endocrine samples, little direct evidence exists to confirm this hypothesis. Potential influences of stress or adrenal stress hormones (cortisol, corticosterone) on male reproduction have also been difficult to study. Baleen has recently been shown to accumulate (...) steroid hormones during growth, such that a single baleen plate contains a continuous, multi-year retrospective record of the whale's endocrine history. As a preliminary investigation into potential testosterone cyclicity in male whales and influences of stress, we determined patterns in immunoreactive testosterone, two glucocorticoids (cortisol and corticosterone), and stable-isotope (SI) ratios, across the full length of baleen plates from a bowhead whale (Balaena mysticetus), a North Atlantic right
Testosterone Top results for testosterone - Trip Database or use your Google+ account Find evidence fast ALL of these words: Title only Anywhere in the document ANY of these words: Title only Anywhere in the document This EXACT phrase: Title only Anywhere in the document EXCLUDING words: Title only Anywhere in the document Timeframe: to: Combine searches by placing the search numbers in the top search box and pressing the search button. An example search might look like (#1 or #2) and (#3 or #4 (...) ) Loading history... Population: Intervention: Comparison: Outcome: Population: Intervention: Latest & greatest articles for testosterone The Trip Database is a leading resource to help health professionals find trustworthy answers to their clinical questions. Users can access the latest research evidence and guidance to answer their clinical questions. We have a large collection of systematic reviews, clinical guidelines, regulatory guidance, clinical trials and many other forms of evidence. If you
Estradiol Does Not Influence Lipid Measures and Inflammatory Markers in Testosterone-Clamped Healthy Men Experimentally controlled studies of estrogenic regulation of lipid measures and inflammatory cytokines in men are rare.To delineate the effect of estradiol (E2) on lipids and inflammatory markers.This was a placebo-controlled, single-masked, prospectively randomized study comprising experimentally degarelix-downregulated healthy men [n = 74; age 65 years (range, 57 to 77)] assigned to four (...) treatment groups: (1) IM saline and oral placebo; (2) IM testosterone and oral placebo; (3) IM testosterone and oral anastrozole (aromatase inhibitor); and (4) IM testosterone, oral anastrozole, and transdermal E2 for 22 (±1) days.Mean mass spectrometry-quantified serum E2 concentrations ranged from 1.2 to 82 pg/mL in the four treatment groups. E2 extremes did not alter total cholesterol, triglyceride, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein cholesterol (HDL-C) , non-HDL-C
Evaluation and Management of Testosterone Deficiency 1 Executive Summary Testosterone testing and prescriptions have nearly tripled in recent years; however, it is clear from clinical practice that there are many men using testosterone without a clear indication. 1-3 Some studies estimate that up to 25% of men who receive testosterone therapy do not have their testosterone tested prior to initiation of treatment. 2, 3 Of men who are treated with testosterone, nearly half do not have (...) their testosterone levels checked after therapy commences. 2, 3 While up to a third of men who are placed on testosterone therapy do not meet the criteria to be diagnosed as testosterone deficient, 2, 3 there are a large percentage of men in need of testosterone therapy who fail to receive it due to clinician concerns, mainly surrounding prostate cancer development and cardiovascular events, although current evidence fails to definitively support these concerns. Given the clinical and commercial testosterone
Suspected Testosterone-Producing Tumor in a Patient Taking Biotin Supplements A perimenopausal woman presented with palpitations, hirsutism, and inability to lose weight. Laboratory tests revealed an unusual endocrine hormonal profile including pituitary hormones (TSH, ACTH, and prolactin) below reference intervals and gonadal (testosterone) and adrenal (cortisol) hormones above reference intervals. Ultimately, after a comprehensive workup including a scheduled surgical procedure, abnormal (...) , but also in tests for gonadal steroids, adrenal, and pituitary hormones. Falsely high as well as falsely low results can be ascribed to biotin. Competitive immunoassays (Fig. 1A)- in this case, tests used initially for serum cortisol and testosterone- can demonstrate falsely high results. Interference falsely lowers the immunometric "sandwich" immunoassay (Fig. 1B)-in this case, TSH. Biotin effect on our patient's endocrine testing led to decidedly abnormal findings, unnecessary medical referrals
Association of serum testosterone and dehydroepiandrosterone sulfate with rheumatoid arthritis: a case control study It is supposed that hypoandrogenism may be involved in the pathogenesis of rheumatoid arthritis (RA). Testosterone and dehydroepiandrosterone sulfate (DHEAs) levels decrease in body fluids of patients with RA.The aim of this study was to determine the association of serum testosterone and DHEAs with RA.This case-control study was conducted on 59 patients with RA and 61 healthy (...) gender- and age-matched controls at Qazvin University of Medical Sciences, Qazvin, Iran, in 2014. Serum free testosterone and DHEAs levels were measured and compared between two groups. Serum testosterone levels lower than 0.029 ng/ml in females and 2.49 ng/ml in males were considered as abnormal. DHEAs levels lower than 18.9 μg/dl in females and 88.9 μg/dl in males were considered as abnormal. Data were analyzed using independent sample T-test, Chi-square test, and logistic regression analysis
Testosterone and All-Cause Mortality in Older Men: The Role of Metabolic Syndrome Previous studies have shown controversial results about the role of testosterone in all-cause mortality in elderly men. We hypothesized that metabolic syndrome (MetS) could partly explain this discrepancy. We therefore examined the association of all-cause mortality with total and bioavailable testosterone, taking into account the MetS. We used data from the Three-City Cohort (3C) study with 12-year follow-up (...) . The 3C study included 3650 men aged >65 years in three French cities. Hormone was measured in a random subsample of 444 men, and MetS was determined as stated by the International Diabetes Federation criteria. We used inverse-probability-weighted Cox regression to estimate hazard ratios (HRs) and 95% confidence intervals (95% CIs). Of 444 men included in the analysis, 106 (23.9%) had MetS at baseline, and 166 died over the follow-up. There was a significant interaction between testosterone level
Bioavailable Testosterone Is Positively Associated With Bone Mineral Density in Male Kidney Transplantation Candidates Low levels of sex hormones are common in patients with chronic kidney disease (CKD) and may be a contributing factor to bone fragility. We investigated associations between levels of sex hormones and bone mineral density (BMD) in adult kidney transplantation candidates.Volumetric BMD of spine and hip were measured by computed tomography. Parathyroid hormone (PTH), testosterone
Associations Between Low Serum Testosterone and All-Cause Mortality and Infection-Related Hospitalization in Male Hemodialysis Patients: A Prospective Cohort Study Infectious diseases are the second highest cause of death in patients on dialysis. In addition, testosterone deficiency or hypogonadism is prevalent in dialysis patients. However, to our knowledge, no studies have investigated the association between testosterone levels and infectious events. We aimed to evaluate whether serum (...) testosterone levels are associated with infection-related hospitalization in male hemodialysis patients in a prospective cohort study.We divided the study population into 3 groups based on serum testosterone levels. Associations between testosterone levels and clinical outcomes of infection-related hospitalization, all-cause mortality, and cardiovascular disease (CVD) events were analyzed using the Cox proportional hazard model.Nine hundred two male patients were enrolled and followed up for a median
Serum testosterone changes in patients treated with radiation therapy alone for prostate cancer on NRG oncology RTOG 9408 We reviewed testosterone changes for patients who were treated with radiation therapy (RT) alone on NRG oncology RTOG 9408.Patients (T1b-T2b, prostate-specific antigen <20 ng/mL) were randomized between RT alone and RT plus 4 months of androgen ablation. Serum testosterone (ST) levels were investigated at enrollment, RT completion, and the first follow-up 3 months after RT (...) . The Wilcoxon signed rank test was used to compare pre- and post-treatment ST levels in patients who were randomized to the RT-alone arm.Of 2028 patients enrolled, 992 patients were randomized to receive RT alone and 917 (92.4%) had baseline ST values available and completed RT. Of these 917 patients, immediate and 3-month post-RT testosterone levels were available for 447 and 373 patients, respectively. Excluding 2 patients who received hormonal therapy off protocol after RT, 447 and 371 patients
Serum Testosterone Concentrations Remain Stable Between Injections in Patients Receiving Subcutaneous Testosterone Intramuscular (IM) testosterone is the most common modality for testosterone therapy of both male hypogonadism and female-to-male (FTM) gender transition. However, IM injections can be painful and often are not self-administered by the patient. The objective of this study was to further characterize subcutaneous (SC) administration of testosterone as an effective and safe (...) alternative to IM injections by evaluating the pharmacodynamics of serum total and free testosterone concentrations between weekly testosterone injections.Eleven FTM transgender patients already receiving weekly SC testosterone cypionate with documented therapeutic levels prior to enrollment had free and total serum testosterone levels measured at eight different time points during a 1-week dosing interval.Mean levels of total and free testosterone were stable and remained well within the normal range
Testosterone Replacement Therapy and Risk of Favorable and Aggressive Prostate Cancer 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
Genetics of Sex Hormone-Binding Globulin and Testosterone Levels in Fertile and Infertile Men of Reproductive Age Testosterone (T) is a central androgenic hormone, and sex hormone-binding globulin (SHBG) is the major determinant of its bioactivity. There are no acknowledged genetic variants with clear-cut clinical implications, modulating T levels in men.To confirm genetic associations of top loci (SHBG, GCKR, SLCO1B1, and JMJD1C) from genome-wide association (GWA) studies for serum SHBG