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Mann A, Strange RC, König CS, Hackett G, Haider A, Haider KS, Desnerck P, Ramachandran S. Testosterone replacement therapy: association with mortality in high-risk patient subgroups. Andrology 2024; 12:1389-1397. [PMID: 38148671 DOI: 10.1111/andr.13582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/12/2023] [Accepted: 12/14/2023] [Indexed: 12/28/2023]
Abstract
OBJECTIVES We describe studies determining the association between testosterone therapy (TTh) and mortality. MATERIALS & METHODS We used a registry database of 737 men with adult-onset testosterone deficiency defined as presenting with low serum total testosterone (TT) levels ≤12.1 nmol/L and associated symptoms over a near 10-year follow-up. We compared associations between testosterone undecanoate (TU), cardio-metabolic risk factors and mortality using non-parametric statistics followed by separate Cox regression models to determine if any association between TU and morality was independent of age and cardio-metabolic risk factors. Finally, the association between TU and mortality was studied in men stratified by cardio-metabolic risk. RESULTS During a median follow-up interquartile range (IQR) of 114 (84-132) months, 94 of the 737 men died. TU (ref: non-treatment) was associated with mortality; hazard ratio = 0.23, 95% confidence intervals = 0.14-0.40. Cox's regression models showed the above association to be independent of baseline age, waist circumference, hemoglobin A1c, lipids, blood pressure, smoking, and type 2 diabetes. These variables remained associated with mortality. We finally stratified the men by the high-risk baseline variables and established that the association between mortality and TU was only evident in men at higher risk. A possible explanation could lie with the "law of initial value," where greater improvements are evident following treatment in patients with worse baseline values. CONCLUSIONS This study with long follow-up confirms that TTh is associated with lower mortality in men with adult-onset TD. This association was evident only in men with greater cardio-metabolic risk factors who demonstrated greater benefit.
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Affiliation(s)
- Amar Mann
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, West Midlands, UK
| | - Richard C Strange
- Institute for Science and Technology in Medicine, Keele University, Staffordshire, UK
| | - Carola S König
- Department of Mechanical and Aerospace Engineering, Brunel University London, London, UK
| | - Geoffrey Hackett
- School of Health and Life Sciences, Aston University, Birmingham, UK
| | - Ahmad Haider
- Urological Practice Dr. Haider, Bremerhaven, Germany
| | | | - Peter Desnerck
- Department of Engineering, University of Cambridge, Cambridge, UK
| | - Sudarshan Ramachandran
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, West Midlands, UK
- Institute for Science and Technology in Medicine, Keele University, Staffordshire, UK
- Department of Clinical Biochemistry, University Hospitals of North Midlands NHS Foundation Trust, Staffordshire, UK
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2
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Tishova Y, Kalinchenko S, Mskhalaya G, Hackett G, Livingston M, König C, Strange R, Zitzmann M, Mann A, Maarouf A, Ramachandran S. Testosterone therapy reduces insulin resistance in men with adult-onset testosterone deficiency and metabolic syndrome. Results from the Moscow Study, a randomized controlled trial with an open-label phase. Diabetes Obes Metab 2024; 26:2147-2157. [PMID: 38433502 DOI: 10.1111/dom.15520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/01/2024] [Accepted: 02/11/2024] [Indexed: 03/05/2024]
Abstract
AIMS To describe changes in homeostasis model assessment of insulin resistance index (HOMA-IR) following testosterone therapy in men with hypogonadism and metabolic syndrome (MetS). MATERIALS AND METHODS A randomized, placebo-controlled, double-blind randomized controlled trial (RCT) comprising 184 men with MetS and hypogonadism (testosterone undecanoate [TU]: 113 men, placebo: 71 men) was conducted. This was followed by an open-label phase in which all men were given TU. We focused on men who were not receiving antiglycaemic agents (TU: 81 men; placebo: 54 men) as these could affect HOMA-IR. Inter-group comparison of HOMA-IR was restricted to the RCT (30 weeks), whilst intra-group comparison was carried out on men provided TU during the RCT and open-label phases (study cohort) and men given placebo during the RCT and then switched to TU during the open-label phase (confirmatory cohort). Regression analysis was performed to identify factors associated with change in HOMA-IR (∆HOMA-IR). RESULTS The median HOMA-IR was significantly reduced at almost every time point (after 18 weeks) compared to baseline in men receiving TU in both the study and confirmatory cohorts. There was a significant decrease in median values of fasting glucose (30 weeks: -2.1%; 138 weeks: -4.9%) and insulin (30 weeks: -10.5%; 138 weeks: -35.5%) after TU treatment. Placebo was not associated with significant ∆HOMA-IR. The only consistent predictor of HOMA-IR decrease following TU treatment was baseline HOMA-IR (r2 ≥ 0.64). CONCLUSIONS Baseline HOMA-IR predicted ΔHOMA-IR, with a greater percentage change in insulin than in fasting glucose. In men with MetS/type 2 diabetes (T2DM) not on antiglycaemic therapy, improvements in HOMA-IR may be greater than suggested by change in fasting glucose. Our results suggest that hypogonadism screening be included in the management of men with MetS/T2DM.
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Affiliation(s)
- Yuliya Tishova
- Department of Endocrinology, Medical Clinic K-medicine, Moscow, Russia
| | - Svetlana Kalinchenko
- Department of Endocrinology, People's Friendship University of Russia, Moscow, Russia
| | - George Mskhalaya
- Department of Preventive Medicine, European Medical Center, Moscow, Russia
| | - Geoffrey Hackett
- School of Health and Life Sciences, Aston University, Birmingham, UK
| | - Mark Livingston
- Department of Clinical Biochemistry, Black Country Pathology Services, Walsall Manor Hospital, UK
- School of Medicine and Clinical Practice, Faculty of Science and Engineering, The University of Wolverhampton, Wolverhampton, UK
| | - Carola König
- Department of Mechanical and Aerospace Engineering, Brunel University, London, UK
| | - Richard Strange
- School of Pharmacy and Bioengineering, Keele University, Staffordshire, UK
| | - Michael Zitzmann
- Department of Clinical and Surgical Andrology, Centre of Reproductive Medicine and Andrology, Munster University Hospital, Munster, Germany
| | - Amar Mann
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, West Midlands, UK
| | - Amro Maarouf
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, West Midlands, UK
| | - Sudarshan Ramachandran
- Department of Mechanical and Aerospace Engineering, Brunel University, London, UK
- School of Pharmacy and Bioengineering, Keele University, Staffordshire, UK
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, West Midlands, UK
- Department of Clinical Biochemistry, University Hospitals of North Midlands NHS Foundation Trust, Staffordshire, UK
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3
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Livingston M, Heald AH. Adult Male Hypogonadism: A Laboratory Medicine Perspective on Its Diagnosis and Management. Diagnostics (Basel) 2023; 13:3650. [PMID: 38132234 PMCID: PMC10743125 DOI: 10.3390/diagnostics13243650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/13/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023] Open
Abstract
Testosterone (T), the principal androgen secreted by the testes, plays an essential role in male health. Male hypogonadism is diagnosed based on a combination of associated clinical signs and symptoms and laboratory confirmation of low circulating T levels. In this review, we have highlighted factors, both biological and analytical, that introduce variation into the measurement of serum T concentrations in men; these need to be considered when requesting T levels and interpreting results. There is an ongoing need for analytical standardisation of T assays and harmonisation of pre- and post-analytical laboratory practices, particularly in relation to the laboratory reference intervals provided to clinicians. Further, there is a need to share with service users the most up-to-date and evidence-based action thresholds for serum T as recommended in the literature. Estimation of free testosterone may be helpful. Causes of secondary hypogonadism should be considered. A comprehensive approach is required in the management of male hypogonadism, including lifestyle modification as well as medication where appropriate. The goal of treatment is the resolution of symptoms as well as the optimisation of metabolic, cardiovascular, and bone health. The advice of an endocrinologist should be sought when there is doubt about the cause and appropriate management of the hypogonadism.
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Affiliation(s)
- Mark Livingston
- Department of Clinical Biochemistry, Black Country Pathology Services, The Royal Wolverhampton NHS Trust, Wolverhampton WV10 0QP, UK
- School of Medicine and Clinical Practice, The University of Wolverhampton, Wolverhampton WV1 1LY, UK
| | - Adrian H. Heald
- The School of Medicine and Manchester Academic Health Sciences Centre, Manchester University, Manchester M13 9PL, UK;
- Department of Endocrinology and Diabetes, Salford Royal Hospital, Salford M6 8HD, UK
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König CS, Mann A, McFarlane R, Marriott J, Price M, Ramachandran S. Age and the Residual Risk of Cardiovascular Disease following Low Density Lipoprotein-Cholesterol Exposure. Biomedicines 2023; 11:3208. [PMID: 38137429 PMCID: PMC10740806 DOI: 10.3390/biomedicines11123208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
We believe that there is sufficient evidence from basic science, longitudinal cohort studies and randomised controlled trials which validates the low-density lipoprotein cholesterol (LDL-C) or lipid hypothesis. It is important that we can communicate details of the cardiovascular disease (CVD) risk reduction that the average patient could expect depending on the scale of LDL-C decrease following lipid lowering therapy. It is also essential that residual risk (ResR) of CVD be highlighted. To achieve this aim by using existing trial evidence, we developed mathematical models initially for relative risk reduction (RRR) and absolute risk (AR) reduction and then showed that despite optimising LDL-C levels, a considerable degree of ResR remains that is dependent on AR. Age is significantly associated with AR (odds ratio: 1.02, 95% confidence intervals: 1.01-1.04) as was previously demonstrated by analysing the Whickham study cohort using a logistic regression model (age remaining significant even when all the other significant risk factors such as sex, smoking, systolic blood pressure, diabetes and family history were included in the regression model). A discussion of a paper by Ference et al. provided detailed evidence of the relationship between age and AR, based on lifetime LDL-C exposure. Finally, we discussed non-traditional CVD risk factors that may contribute to ResR based on randomised controlled trials investigating drugs improving inflammation, thrombosis, metabolic and endothelial status.
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Affiliation(s)
- Carola S. König
- Department of Mechanical and Aerospace Engineering, Brunel University London, London UB8 3PH, UK
| | - Amar Mann
- Institute of Clinical Sciences, University of Birmingham, Birmingham B15 2TT, UK; (A.M.); (R.M.); (J.M.)
| | - Rob McFarlane
- Institute of Clinical Sciences, University of Birmingham, Birmingham B15 2TT, UK; (A.M.); (R.M.); (J.M.)
| | - John Marriott
- Institute of Clinical Sciences, University of Birmingham, Birmingham B15 2TT, UK; (A.M.); (R.M.); (J.M.)
| | - Malcolm Price
- Institute of Applied Health Research, University of Birmingham, Birmingham B15 2TT, UK;
| | - Sudarshan Ramachandran
- Department of Mechanical and Aerospace Engineering, Brunel University London, London UB8 3PH, UK
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2GW, UK
- Department of Clinical Biochemistry, University Hospitals of North Midlands, Staffordshire ST4 6QG, UK
- School of Medicine, Keele University, Staffordshire ST5 5BG, UK
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Heald A, Cook MJ, Antonio L, Tournoy J, Ghaffari P, Mannan F, Fachim H, Vanderschueren D, Laing I, Hackett G, Casanueva FF, Huhtaniemi IT, Maggi M, Rastrelli G, Slowikowska-Hilczer J, Wu F, O'Neill TW. Number of CAG repeats and mortality in middle aged and older men. Clin Endocrinol (Oxf) 2023; 99:559-565. [PMID: 37718889 DOI: 10.1111/cen.14962] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 08/07/2023] [Accepted: 08/10/2023] [Indexed: 09/19/2023]
Abstract
DESIGN The androgen receptor (AR) mediates peripheral effects of testosterone. Previous data suggests an association between the number of CAG repeats in exon-1 of the AR gene and AR transcriptional activity. The aim of this analysis was to determine the association between the number of AR CAG repeats and all-cause mortality in men and the influence of testosterone level on the association. PATIENTS AND MEASUREMENTS Follow-up data to 27 January 2018 were available for men aged 40-79 years recruited across six countries of the European Male Aging Study between 2003 and 2005. Cox proportional hazards modelling was used to determine the association between CAG repeat number/mortality. Results were expressed as hazard ratios (HR)/95% confidence intervals (CI). RESULTS One thousand nine hundred and seventy-seven men were followed up. Mean baseline age was 60 ± 11.1 years. Mean duration of follow-up was 12.2 years. At follow up 25.1% of men had died. CAG repeat length ranged from 6 to 39, with the highest proportion of CAG repeat number at 21 repeats (16.4%). In a multivariable model, compared to men with 22-23 AR CAG repeats: for men with <22 and >23 AR CAG HR, 95% CI for mortality were, <22 CAG repeats 1.17 (0.93-1.49) and >23 CAG repeats 1.14 (0.88-1.47). In a post-hoc analysis, the association was significant for men in the lowest tertile of baseline testosterone (<14.2 nmol/L) with >23 CAG repeats: in the adjusted model for <22 and >23 CAG repeats, respectively, 1.49 (0.97-2.27) and 1.68 (1.06-2.67) versus 22-23 repeats. CONCLUSIONS Our European-wide cohort data overall found no association of androgen receptor CAG repeat number and mortality in men. However, post hoc analysis suggested that an association might be present in men with lower baseline testosterone concentrations, which merits further investigation.
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Affiliation(s)
- Adrian Heald
- Department of Endocrinology and Diabetes, Salford Royal Hospital, Salford, UK
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Michael J Cook
- Centre for Health Informatics, Division of Informatics, Imaging and Data Science, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute for Health and Care Research Applied Research Collaboration Greater Manchester, Manchester, UK
| | - Leen Antonio
- Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
- Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
| | - Jos Tournoy
- Department of Public Health and Primary Care, Gerontology and Geriatrics Unit, KU Leuven-University of Leuven, Leuven, Belgium
- Department of Geriatric Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Parisa Ghaffari
- Department of Endocrinology and Diabetes, Salford Royal Hospital, Salford, UK
| | - Fahmida Mannan
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Helene Fachim
- Department of Endocrinology and Diabetes, Salford Royal Hospital, Salford, UK
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Dirk Vanderschueren
- Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
- Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
| | - Ian Laing
- Department of Biochemistry, Royal Preston Hospital, Preston, UK
| | | | - Felipe F Casanueva
- Department of Medicine, Santiagode Compostela University, Complejo Hospitalario Universitariode Santiago (CHUS), CIBER de Fisiopatología Obesidady Nutricion (CB06/03), Instituto Salud Carlos III, Santiago de Compostela, Spain
| | - Ilpo T Huhtaniemi
- Department of Metabolism, Institute of Reproductive and Developmental, Digestion and Reproduction, Imperial College London, London, UK
| | - Mario Maggi
- "Mario Serio" Department of Experimental and Clinical Biomedical Sciences, Endocrinology Unit, University of Florence, Florence, Italy
| | - Giulia Rastrelli
- "Mario Serio" Department of Experimental and Clinical Biomedical Sciences, Endocrinology Unit, University of Florence, Florence, Italy
| | | | - Fred Wu
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Department of Endocrinology, Manchester Royal Infirmary, The University of Manchester, Manchester, UK
| | - Terence W O'Neill
- Centre for Epidemiology Versus Arthritis, The University of Manchester, Manchester, UK
- Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Salford, UK
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6
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Traish AM. Major cardiovascular disease risk in men with testosterone deficiency (hypogonadism): appraisal of short, medium and long-term testosterone therapy - a narrative review. Sex Med Rev 2023; 11:384-394. [PMID: 37587664 DOI: 10.1093/sxmrev/qead031] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/29/2023] [Accepted: 07/04/2023] [Indexed: 08/18/2023]
Abstract
INTRODUCTION Low testosterone (T) levels are associated with obesity, metabolic syndrome, type 2 diabetes mellitus and altered lipid profiles, thus contributing to increased cardiovascular disease risk. Hence T deficiency has a detrimental effect on men's vascular health, quality of life and increased mortality. OBJECTIVES This review aims to present summary of data in the contemporary clinical literature pertaining to the benefits of T therapy in clinical studies with varying durations on vascular health in men with T deficiency. METHODS A Medline search using PubMed and EMBASE was performed using the following key words: "testosterone deficiency," "testosterone therapy," major cardiovascular adverse events", "cardiovascular disease". Relevant studies were extracted, evaluated, and analyzed. We evaluated findings from clinical trials, observational studies and systematic reviews and meta-analyses to develop a comprehensive account of the critical role of T in maintaining vascular health. RESULTS Considerable evidence beginning with studies published in 1940s concomitant with findings from the utmost recent clinical studies suggests a clinical value of T therapy in maintaining vascular health and reducing cardiovascular mortality. The current scientific and clinical evidence demonstrates strong relationship between low circulating T levels and risk of cardiovascular disease and T therapy is deemed safe in men with hypogonadism when given in the physiological range with no apparent harm. CONCLUSION What emerges from the current clinical literature is that, irrespective of the length of study durations, testosterone therapy provides significant health benefits and reduces risk of cardiovascular disease. More important is that data from many observational and registry studies, demonstrated that longer durations of testosterone therapy were associated with greater health benefits and reduced cardiovascular risk. T therapy in men with T deficiency reduces the incidence of major adverse cardiovascular events attributed to improving overall metabolic function.
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Affiliation(s)
- Abdulmaged M Traish
- Department of Biochemistry & Department of Urology, Boston University School of Medicine, Boston, MA 02118, United States
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7
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Hackett G, Kirby M, Rees RW, Jones TH, Muneer A, Livingston M, Ossei-Gerning N, David J, Foster J, Kalra PA, Ramachandran S. The British Society for Sexual Medicine Guidelines on Male Adult Testosterone Deficiency, with Statements for Practice. World J Mens Health 2023:41.e33. [PMID: 36876744 DOI: 10.5534/wjmh.221027] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/07/2022] [Accepted: 11/23/2022] [Indexed: 03/02/2023] Open
Abstract
Testosterone deficiency (TD) is an increasingly common problem with significant health implications, but its diagnosis and management can be challenging. A multi-disciplinary panel from BSSM reviewed the available literature on TD and provide evidence-based statements for clinical practice. Evidence was derived from Medline, EMBASE and Cochrane searches on hypogonadism, testosterone therapy (T Therapy) and cardiovascular safety from May 2017 to September 2022. This revealed 1,714 articles, including 52 clinical trials and 32 placebo-controlled randomised controlled trials. A total of twenty-five statements are provided, relating to five key areas: screening, diagnosis, initiating T Therapy, benefits and risks of T Therapy, and follow-up. Seven statements are supported by level 1 evidence, eight by level 2, five by level 3, and five by level 4. Recent studies have demonstrated that low levels of testosterone in men are associated with increased risk of incident type 2 diabetes mellitus, worse outcomes in chronic kidney disease and COVID 19 infection with increased all-cause mortality, along with significant quality of life implications. These guidelines should help practitioners to effectively diagnose and manage primary and age-related TD.
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Affiliation(s)
- Geoffrey Hackett
- Department of Urology, Spire Hospital, Little Aston, Birmingham, UK.,Department of Urology, Aston University, Birmingham, UK.
| | - Michael Kirby
- Trends in Urology and Men's Health, Letchworth, UK.,Faculty of Health & Human Sciences, University of Hertfordshire & The Prostate Centre, London, UK
| | - Rowland W Rees
- Department of Urology, University Hospital Southampton and UCLH, London, UK
| | - T Hugh Jones
- Department of Endocrinology, Barnsley Hospital, Barnsley, UK.,Department of Biochemistry, Royal Hallamshire Hospital, University of Sheffield Medical School, Sheffield, UK
| | - Asif Muneer
- Division of Surgery and Interventional Science, NIHR Biomedical Research Centre UCLH, London, UK
| | - Mark Livingston
- Department of Biochemistry, Black Country Pathology Services, Walsall Manor Hospital, Walsall, UK
| | - Nick Ossei-Gerning
- Cardiff and Vale NHS Trust, Cardiff, UK.,University of South Wales TDS, Bridgend, UK.,Department of Cardiology, University of Cape Coast, Cape Coast, Ghana
| | | | | | - Philip A Kalra
- Department of Nephrology, NCA, Salford Royal Hospital, Salford, UK
| | - Sudarshan Ramachandran
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Sutton Coldfield, West Midlands, UK
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8
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Liu J, Liu Z, Sun W, Luo L, An X, Yu D, Wang W. Role of sex hormones in diabetic nephropathy. Front Endocrinol (Lausanne) 2023; 14:1135530. [PMID: 37143724 PMCID: PMC10151816 DOI: 10.3389/fendo.2023.1135530] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 03/22/2023] [Indexed: 05/06/2023] Open
Abstract
Diabetic nephropathy (DN) is the most common microvascular complication in diabetes and one of the leading causes of end-stage renal disease. The standard treatments for patients with classic DN focus on blood glucose and blood pressure control, but these treatments can only slow the progression of DN instead of stopping or reversing the disease. In recent years, new drugs targeting the pathological mechanisms of DN (e.g., blocking oxidative stress or inflammation) have emerged, and new therapeutic strategies targeting pathological mechanisms are gaining increasing attention. A growing number of epidemiological and clinical studies suggest that sex hormones play an important role in the onset and progression of DN. Testosterone is the main sex hormone in males and is thought to accelerate the occurrence and progression of DN. Estrogen is the main sex hormone in females and is thought to have renoprotective effects. However, the underlying molecular mechanism by which sex hormones regulate DN has not been fully elucidated and summarized. This review aims to summarize the correlation between sex hormones and DN and evaluate the value of hormonotherapy in DN.
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Affiliation(s)
- Jiahui Liu
- Public Research Platform, First Hospital of Jilin University, Changchun, Jilin, China
| | - Zhe Liu
- College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Weixia Sun
- Nephrology Department, First Hospital of Jilin University, Changchun, Jilin, China
| | - Ling Luo
- Public Research Platform, First Hospital of Jilin University, Changchun, Jilin, China
| | - Xingna An
- Public Research Platform, First Hospital of Jilin University, Changchun, Jilin, China
| | - Dehai Yu
- Public Research Platform, First Hospital of Jilin University, Changchun, Jilin, China
- *Correspondence: Dehai Yu, ; Wanning Wang,
| | - Wanning Wang
- Nephrology Department, First Hospital of Jilin University, Changchun, Jilin, China
- *Correspondence: Dehai Yu, ; Wanning Wang,
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Fallara G, Pozzi E, Belladelli F, Corsini C, Boeri L, Capogrosso P, Montorsi F, Salonia A. Cardiovascular Morbidity and Mortality in Men – Findings From a Meta-analysis on the Time-related Measure of Risk of Exogenous Testosterone. J Sex Med 2022; 19:1243-1254. [DOI: 10.1016/j.jsxm.2022.05.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/22/2022] [Accepted: 05/27/2022] [Indexed: 11/26/2022]
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10
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Interactions between erectile dysfunction, cardiovascular disease and cardiovascular drugs. Nat Rev Cardiol 2022; 19:59-74. [PMID: 34331033 DOI: 10.1038/s41569-021-00593-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/21/2021] [Indexed: 02/06/2023]
Abstract
Sexual health has a fundamental role in overall health and well-being, and a healthy and dynamic sex life can make an important contribution to a good quality of life. Sexual dysfunction, and especially erectile dysfunction (ED) in men, is highly prevalent in patients with cardiovascular disease (CVD). CVD and ED have shared risk factors and pathophysiological links, such as endothelial dysfunction, inflammation and low plasma testosterone levels. ED has been shown to be an independent and early harbinger of future CVD events, providing an important window to initiate preventive measures. Therefore, screening and diagnosing ED is essential for the primary and secondary prevention of CVD because the assessment of ED offers an easy and low-cost prognostic tool that is an alternative to other investigational cardiovascular biomarkers. Moreover, ED is a major contributing factor to the discontinuation of, or poor adherence to, cardiovascular therapy. Cardiovascular drugs have divergent effects on erectile function, with diuretics and β-blockers having the worst profiles, and renin-angiotensin-aldosterone system inhibitors and nebivolol having the best profiles. Pharmacological treatment of ED has an equivocal effect on the risk of CVD, suggesting a complex interaction between ED and drugs for CVD. In this Review, we discuss how sexual function could be incorporated into the patient history taken by physicians treating individuals with CVD, not merely as part of the diagnostic work-up but as a means to pursue tangible and essential benefits in quality of life and cardiovascular outcomes.
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11
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Abildgaard J, Petersen JH, Bang AK, Aksglaede L, Christiansen P, Juul A, Jørgensen N. Long-term testosterone undecanoate treatment in the elderly testosterone deficient male: An observational cohort study. Andrology 2021; 10:322-332. [PMID: 34743411 DOI: 10.1111/andr.13124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 10/28/2021] [Accepted: 10/29/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Quarterly intramuscular injections with long-acting testosterone undecanoate (TU) provide stable serum testosterone concentrations over time and are therefore preferred by many testosterone-deficient patients. However, the use of long-acting TU in elderly patients is limited due to lack of safety and feasibility studies. OBJECTIVE To investigate long-acting TU pharmacokinetics and assess differences in treatment regimens and risk of adverse outcomes in younger versus elderly testosterone-deficient patients. MATERIALS AND METHODS Single-center longitudinal observational study. Patients who initiated long-acting TU treatment between 2005 and 2010 were included. Elderly patients were born before 1956 and younger patients between 1965 and 1985. TU dose was adjusted yearly through shortening or prolongation of time between injections. Treatment targets were as follows: (1) free testosterone between 0 and -1 SD from the age-adjusted mean, (2) no symptoms of testosterone deficiency, and (3) hematocrit within the normal range. RESULTS The study population consisted of 63 elderly and 63 younger patients. Median follow-up time during testosterone replacement was 12.1 years. Increasing intervals between TU injections were performed 44% more often in the elderly compared to younger patients and time between TU injections were prolonged 4% more in the elderly patients. The hematocrit, as well as the hematocrit for a given serum testosterone (hematocrit: testosterone ratio), increased with treatment time but did not differ between age groups. During follow-up, 40% of patients-both elderly and younger-experienced polycythemia. Risk of polycythemia did not differ with age. DISCUSSION AND CONCLUSION An increased number of adjustments of TU dose are necessary in elderly patients in order to reach treatment targets. TU treatment in elderly testosterone-deficient patients is not associated with an increased risk of polycythemia compared to younger patients if age-adjusted treatment targets are reached.
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Affiliation(s)
- Julie Abildgaard
- Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.,The Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Jørgen Holm Petersen
- Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.,Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
| | - Anne Kirstine Bang
- Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Lise Aksglaede
- Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Peter Christiansen
- Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Anders Juul
- Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Niels Jørgensen
- Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
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12
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Burte C, Lejeune H, Faix A, Desvaux P, Almont T, Cuzin B, Huyghe E. [Practical recommendations for the management of testosterone deficiency]. Prog Urol 2021; 31:458-476. [PMID: 34034926 DOI: 10.1016/j.purol.2020.09.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/16/2020] [Accepted: 09/20/2020] [Indexed: 01/08/2023]
Abstract
OBJECTIVES The Francophone Society of Sexual Medicine (SFMS) and the Andrology and Sexual Medicine Committee (CAMS) of the French Association of Urology (AFU) have brought together a panel of experts to develop French recommendations for the management of testosterone deficiency (TD). METHODS Systematic review of the literature between 01/2000 and 07/2019. Use of the method of recommendations for clinical practice (RPC) and the AGREE II grid. RESULTS TD is defined as the association of clinical signs and symptoms suggestive of TD with a decrease in testosterone levels or serum androgen activity. Diagnosis requires a T lower than the reference values in young men on 2 successive assays. Sexual disorders are often at the forefront, and concern the whole male sexual function (desire, arousal, pleasure and orgasm). The most evocative symptoms are: decrease in sexual desire, disappearance of nocturnal erections, fatigue, loss of muscle strength. Overweight, depressed mood, anxiety, irritability and malaise are also frequently found. TD is more common in cases of metabolic, cardiovascular, chronic, andrological diseases, and in cases of corticosteroid, opioid, antipsychotic, anticonvulsant, antiretroviral, or cancer treatment. Since SHBG is frequently abnormal, we recommend that free or bioavailable T is preferred over total T. The treatment of TD requires a prior clinical (DRE, breast examination) and biological (PSA, CBC) assessment. Contraindications to T treatment are: progressive prostate or breast cancer, severe heart failure or recent cardiovascular event, polycytemia, complicated BPH, paternity project. It is possible in cases of sleep apnea syndrome, psychiatric history, stable heart disease, prostate cancer under active surveillance and after one year of complete remission of a low or intermediate risk localized prostate cancer treated in a curative manner. It includes long-term testosterone supplementation and life-style counseling. Treatment is monitored at 3, 6, 12 months and annually thereafter. It is clinical (annual DRE) and biological (total T, PSA, CBC), the most frequent side effect being polyglobulia. CONCLUSION These recommendations should help improve the management of TD.
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Affiliation(s)
- C Burte
- Cabinet de médecine sexuelle, 4, rue des États-Unis, Cannes, France
| | - H Lejeune
- Service de médecine de la reproduction, hôpital Femme-Mère-Enfant, HCL, Bron, France
| | - A Faix
- Cabinet d'urologie, 265, avenue des États-du-Languedoc, Montpellier, France
| | - P Desvaux
- Cabinet de médecine sexuelle, 11, rue Magellan, 75008 Paris, France
| | - T Almont
- Service d'oncologie, CHU de Martinique, Fort-de-France, Martinique
| | - B Cuzin
- Service d'urologie, chirurgie de la transplantation, hôpital Édouard-Herriot, CHU de Lyon, France
| | - E Huyghe
- Médecine de la reproduction, CHU de Toulouse, site de Paule-de-Viguier, Toulouse, France; Département d'urologie, transplantation rénale et andrologie, hôpital Rangueil, CHU de Toulouse, France.
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13
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Heald AH, Stedman M, Whyte M, Livingston M, Albanese M, Ramachandran S, Hackett G. Lessons learnt from the variation across 6741 family/general practices in England in the use of treatments for hypogonadism. Clin Endocrinol (Oxf) 2021; 94:827-836. [PMID: 33420743 DOI: 10.1111/cen.14412] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 12/17/2022]
Abstract
INTRODUCTION We have previously reported rates of diagnosis of male hypogonadism in United Kingdom (UK) general practices. We aimed to identify factors associated with testosterone prescribing in UK general practice. METHODS We determined for 6741 general practices in England, the level of testosterone prescribing in men and the relation between volume of testosterone prescribing and (1) demographic characteristics of the practice, (2) % patients with specific comorbidities and (3) national GP patient survey results. RESULTS The largest volume (by prescribing volume) agents were injectable preparations at a total cost in the 12-month period 2018/19 of £8,172,519 with gel preparations in second place: total cost £4,795,057. Transdermal patches, once the only alternative to testosterone injections or implants, were little prescribed: total cost £222,022. The analysis accounted for 0.27 of the variance in testosterone prescribing between general practices. Thus, most of this variance was not accounted for by the analysis. There was a strong univariant relation (r = .95, P < .001) between PDE5-I prescribing and testosterone prescribing. Other multivariant factors independently linked with more testosterone prescribing were as follows: HIGHER proportion of men with type 2 diabetes(T2DM) on target control (HbA1c ≤ 58 mmol/mol) and HIGHER overall practice rating on the National Patient Survey for good experience, while non-white ethnicity and socio-economic deprivation were associated with less testosterone prescribing. There were a number of comorbidity factors associated with less prescribing of testosterone (such as T2DM, hypertension and stroke/TIA). CONCLUSION Our analysis has indicated that variation between general practices in testosterone prescribing in a well developed health economy is only related to small degree (r2 = 0.27) to factors that we can define. This suggests that variation in amount of testosterone prescribed is largely related to general practitioner choice/other factors not studied and may be amenable to measures to increase knowledge/awareness of male hypogonadism, with implications for men's health.
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Affiliation(s)
- Adrian H Heald
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Department of Diabetes and Endocrinology, Salford Royal Hospital, Salford, UK
| | | | - Martin Whyte
- Clinical and Experimental Medicine, University of Surrey, Surrey, UK
| | - Mark Livingston
- Department of Clinical Biochemistry, Black Country Pathology Services, Walsall, UK
- School of Medicine and Clinical Practice & Department of Biomedical Science and Physiology, Faculty of Science & Engineering, University of Wolverhampton, Wolverhampton, UK
| | - Marco Albanese
- Herzzentrum Hirslanden Zentralschweiz, Luzern, Switzerland
| | - Sud Ramachandran
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
- Department of Clinical Biochemistry, University Hospitals of North Midlands/Institute for Science and Technology in Medicine, Keele University, Staffordshire, UK
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14
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Yeo S, Holl K, Peñaherrera N, Wissinger U, Anstee K, Wyn R. Burden of Male Hypogonadism and Major Comorbidities, and the Clinical, Economic, and Humanistic Benefits of Testosterone Therapy: A Narrative Review. CLINICOECONOMICS AND OUTCOMES RESEARCH 2021; 13:31-38. [PMID: 33488103 PMCID: PMC7814241 DOI: 10.2147/ceor.s285434] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 12/03/2020] [Indexed: 01/10/2023] Open
Abstract
Male hypogonadism and major comorbidities such as type 2 diabetes mellitus, obesity, cardiovascular disease, and osteoporosis appear closely connected, forming a vicious cycle that leads to further hypogonadism. This narrative review provides a comprehensive overview of the current literature on the overall burden of male hypogonadism alongside related comorbidities, and how this may be alleviated through testosterone therapy. Observational and clinical data demonstrate that the interaction of male hypogonadism and its related comorbidities is associated with increased mortality, cardiovascular event risk and reduced quality of life. Evidence from epidemiological and registry-based studies shows that this clinical and humanistic burden translates to increased economic burden on health-care systems, through increased physician visits, medical claims, and drug costs. Male hypogonadism can be managed with testosterone therapy, which is intended to normalize testosterone concentrations and thereby reduce both hypogonadism symptoms and risk of comorbidities. Clinical and observational data suggest that in males with hypogonadism, testosterone therapy rapidly and sustainably improves glycemia, reduces risk of progression to diabetes, leads to significantly reduced waist circumference and fat mass, while providing significant positive effects on cardiovascular event risk and bone density. Significant and sustained improvement in patient-reported erectile function, urinary function, and aging male symptoms have also been shown. Economic evaluations have estimated that reduced comorbidity risk following testosterone therapy may lead to cost-savings, with one study estimating yearly inpatient savings of £3732 for treating comorbidities after intervention. A major unmet need exists in the area of male hypogonadism, particularly related to common comorbidities. Options for treatment include testosterone therapy, which has been shown to alleviate the clinical, economic, and humanistic burden associated with these conditions. As the prevalence of male hypogonadism is likely to increase globally, and this condition may be currently underdiagnosed, cost-saving testosterone therapies should be increasingly considered to manage hypogonadism.
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Affiliation(s)
- Sandy Yeo
- Real World Evidence, Bayer (South East Asia) Pte Ltd, Singapore
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15
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Yeo JL, Brady EM, McCann GP, Gulsin GS. Sex and ethnic differences in the cardiovascular complications of type 2 diabetes. Ther Adv Endocrinol Metab 2021; 12:20420188211034297. [PMID: 34408835 PMCID: PMC8365016 DOI: 10.1177/20420188211034297] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 07/05/2021] [Indexed: 12/14/2022] Open
Abstract
Diabetes mellitus represents a global health concern affecting 463 million adults and is projected to rapidly rise to 700 million people by 2045. Amongst those with type 2 diabetes (T2D), there are recognised differences in the impact of the disease on different sex and ethnic groups. The relative risk of cardiovascular complications between individuals with and without T2D is higher in females than males. People of South Asian heritage are two to four times more likely to develop T2D than white people, but conversely not more likely to experience cardiovascular complications. Differences in the pathophysiological responses in these groups may identify potential areas for intervention beyond glycaemic control. In this review, we highlight key differences of diabetes-associated cardiovascular complications by sex and ethnic background, with a particular emphasis on South Asians. Evidence assessing therapeutic efficacy of new glucose lowering drugs in minority groups is limited and many major cardiovascular outcomes trials do not report ethnic specific data. Conversely, lifestyle intervention and bariatric surgery appear to have similar benefits regardless of sex and ethnic groups. We encourage future studies with better representation of women and ethnic minorities that will provide valuable data to allow better risk stratification and tailored prevention and management strategies to improve cardiovascular outcomes in T2D.
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Affiliation(s)
- Jian L Yeo
- Department of Cardiovascular Sciences, University of Leicester and the Leicester NIHR Biomedical Research Centre, Glenfield Hospital, Groby Road, Leicester, LE3 9QP, UK
| | - Emer M Brady
- Department of Cardiovascular Sciences, University of Leicester and the Leicester NIHR Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Gerry P McCann
- Department of Cardiovascular Sciences, University of Leicester and the Leicester NIHR Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Gaurav S Gulsin
- Department of Cardiovascular Sciences, University of Leicester and the Leicester NIHR Biomedical Research Centre, Glenfield Hospital, Leicester, UK
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16
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Livingston M, Downie P, Hackett G, Marrington R, Heald A, Ramachandran S. An audit of the measurement and reporting of male testosterone levels in UK clinical biochemistry laboratories. Int J Clin Pract 2020; 74:e13607. [PMID: 32649008 DOI: 10.1111/ijcp.13607] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 07/06/2020] [Indexed: 12/17/2022] Open
Abstract
INTRODUCTION A number of guidance documents have been published in recent years for the diagnosis and management of hypogonadism (HG). Laboratory practice has a major role in supporting guidelines with accurate and precise serum total testosterone (TT) methods and standardised pre- and post-analytical protocols. Our study investigated whether laboratory practice currently supports the management guidelines for HG. METHODS An internet-based questionnaire survey of senior laboratory biochemists (UK/Republic of Ireland) was conducted (April-May 2018). Questions reflected sampling, laboratory practice, reference ranges and reporting of results. The results were analysed in conjunction with data obtained from the UK National External Quality Assurance Service (UK NEQAS) on testosterone assay performance. RESULTS Analyses of 96 laboratory surveys returned the following: 74 laboratories stated that the optimal sampling time was communicated to users; 81 laboratories used immunoassays; 76 laboratories included reference ranges for adult men (31 had dual/multiple age-related intervals). Wide variability in lower/upper limits was evident in the common immunoassays; the majority of reference ranges were from manufacturers (50.0%) or historical (18.8%). Action limits based on TT levels were used by 64 laboratories, but 63 did not report a borderline range as suggested by the guidelines. Protocols for cascading tests based on TT were evident in 58 laboratories, with 50 laboratories offering estimated free testosterone; interpretative comments were provided by 67 laboratories, but no references were made to the management guidelines. Data from UK NEQAS demonstrated considerable variation in testosterone assay performance. CONCLUSIONS Our survey has highlighted inconsistencies that could lead to HG (and other conditions requiring measurement of TT) not being managed appropriately. The results from this survey and from UK NEQAS reinforce the requirement for action to be considered regarding the standardisation of testosterone assays and harmonisation of laboratory practice.
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Affiliation(s)
- Mark Livingston
- Department of Clinical Biochemistry, Black Country Pathology Services, Walsall Manor Hospital, Walsall, UK
- The School of Medicine and Clinical Practice & Department of Biomedical Science and Physiology, The University of Wolverhampton, Wolverhampton, UK
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Paul Downie
- Department of Clinical Biochemistry, Bristol Royal Infirmary, Bristol, UK
| | - Geoff Hackett
- School of Health and Life Sciences, Aston University, Birmingham, UK
| | - Rachel Marrington
- Birmingham Quality (UK NEQAS) University Hospitals NHS Foundation Trust, Birmingham, UK
| | - Adrian Heald
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Department of Endocrinology and Diabetes, Salford Royal Hospital, Manchester, UK
| | - Sudarshan Ramachandran
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
- Department of Clinical Biochemistry, University Hospitals of North Midlands, Stoke-on-Trent, UK
- Institute of Science and Technology, Keele University, Keele, UK
- Faculty of Health Sciences, Staffordshire University, Staffordshire, UK
- College of Engineering, Design and Physical Sciences, Brunel University London, London, UK
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17
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Stedman M, Whyte MB, Lunt M, Albanese M, Livingston M, Gadsby R, Hackett G, Anderson SG, Heald AH. The treatment rate of erectile dysfunction (ED) in younger men with type 2 diabetes is up to four times higher than the equivalent non-diabetes population. Int J Clin Pract 2020; 74:e13538. [PMID: 32431020 DOI: 10.1111/ijcp.13538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 05/14/2020] [Indexed: 11/28/2022] Open
Abstract
INTRODUCTION Erectile dysfunction (ED) is common in older age and in diabetes mellitus (DM). Phosphodiesterase type 5-inhibitors (PDE5-is) are the first-line for ED. We investigated how the type of diabetes and age of males affect the PDE5-i use in the primary care setting. METHODS From 2018 to 2019, the general practice level quantity of all PDE5-i agents was taken from the general practice (GP) Prescribing Dataset in England. The variation in outcomes across practices was examined across one year, and for the same practice against the previous year. RESULTS We included 5761 larger practices supporting 25.8 million men of whom 4.2 million ≥65 years old. Of these, 1.4 million had T2DM, with 0.8 million of these >65. About 137 000 people had T1DM. About 28.8 million tablets of PDE5-i were prescribed within the 12 months (2018-2019) period in 3.7 million prescriptions (7.7 tablets/prescription), at total costs of £15.8 million (£0.55/tablet). The NHS ED limit of one tablet/user/wk suggests that 540 000 males are being prescribed a PDE5-i at a cost of £29/y each. With approximately 30 000 GPs practising, this is equivalent to one GP providing 2.5 prescriptions/wk to overall 18 males. There was a 3x variation between the highest decile of practices (2.6 tablets/male/y) and lowest decile (0.96 tablets/male/y). The statistical model captured 14% of this variation and showed that T1DM males were the largest users, while men age <65 with T2DM were being prescribed four times as much as non-DM. Those T2DM >65 were prescribed 80% of the non-DM amount. CONCLUSION There is a wide variation in the use of PDE5-is. With only 14% variance capture, other factors including wide variation in patient awareness, prescribing rules of local health providers, and recognition of the importance of male sexual health by GP prescribers might have a significant impact.
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Affiliation(s)
| | - Martin B Whyte
- Clinical and Experimental Medicine, University of Surrey, Guildford, UK
| | - Mark Lunt
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Marco Albanese
- Herzzentrum Hirslanden Zentralschweiz, Luzern, Switzerland
| | - Mark Livingston
- Black Country Pathology Services, Walsall Manor Hospital, Walsall, UK
| | - Roger Gadsby
- Warwick Medical School, University of Warwick, Coventry, UK
| | | | - Simon G Anderson
- The George Alleyne Chronic Disease Research Centre, Caribbean Institute of Health Research, University of the West Indies, Bridgetown, Barbados
- Division of Cardiovascular Sciences, University of Manchester, Manchester, UK
| | - Adrian H Heald
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Salford Royal Hospital, Salford, UK
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18
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Ramachandran S, Hackett GI, Strange RC. Testosterone replacement therapy: Pre-treatment sex hormone-binding globulin levels and age may identify clinical subgroups. Andrology 2020; 8:1222-1232. [PMID: 32384175 DOI: 10.1111/andr.12813] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 03/26/2020] [Accepted: 05/04/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Testosterone replacement therapy (TRT) improves health in some but not all men with type 2 diabetes (T2DM) and adult-onset testosterone deficiency (TD). Such heterogeneity is compatible with the concept of patient subgroups that respond differently to therapy. OBJECTIVES Use baseline SHBG and age to identify putative subgroups that demonstrate different responses in variables such as waist circumference and HbA1c following TRT. MATERIALS AND METHODS A randomized double-blind trial approach was used to recruit and randomize men with T2DM and adult-onset TD into placebo and TRT-treated groups. Multiple regression was used to study differences between groups. RESULTS Baseline SHBG and change in SHBG (∆SHBG) were inversely related in the TRT group. Both median values of SHBG and age mediated the effect of TRT on ∆SHBG depending on whether baseline values were ≤ or>median (28.1 nmol/L, 63 years, respectively). In men with both SHBG ≤ 28.1 nmol/L and age ≤ 63 years (subgroup 1), TRT was positively associated with ∆SHBG (c = 4.67, 95%CI 1.17-8.16, P = .010) while in those with SHBG > 28.1 nmol/L and age > 63.1 years (subgroup 4) the association was inverse (c = -7.07, 95%CI -11.64 to -2.49, P = .003). The association between TRT and change (∆) in waist circumference, HbA1c and International Index of Erectile Function (IIEF) score differed between subgroups; in subgroup 4 but not subgroup 1, the therapy was significantly associated with ∆waist circumference, ∆HbA1c and ∆IIEF. DISCUSSION Though the mechanism remains unclear, our finding of different responses to TRT in terms of change in waist circumference, HbA1c and IIEF score supports the concept of subgroups in men with T2DM and adult-onset TD. CONCLUSION Our approach may provide a basis for identifying men who will or will not derive benefit from TRT though a larger study is required.
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Affiliation(s)
- Sudarshan Ramachandran
- Department of Clinical Biochemistry, Faculty of Health Sciences, University Hospitals of North Midlands, Staffordshire University, Stoke-on-Trent, UK.,Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.,Department of Mechanical and Aerospace Engineering, Brunel University London, London, UK.,Institute for Science and Technology in Medicine, Keele University, Keele, UK
| | | | - Richard C Strange
- Institute for Science and Technology in Medicine, Keele University, Keele, UK
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19
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Hackett G. Should All Men with Type 2 Diabetes Be Routinely Prescribed a Phosphodiesterase Type 5 Inhibitor? World J Mens Health 2020; 38:271-284. [PMID: 32378365 PMCID: PMC7308237 DOI: 10.5534/wjmh.200027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 01/07/2020] [Accepted: 02/18/2020] [Indexed: 12/17/2022] Open
Abstract
Important health problems in men such as type 2 diabetes (T2DM), insulin resistance, erectile dysfunction, benign prostatic hyperplasia and depression have been shown to have to share common pathological processes, such as endothelial dysfunction and inflammation. This paper discusses the role of phosphodiesterase type 5 (PDE5) inhibitors, through beneficial effects on endothelial function and mediators of chronic inflammation and the possibility to treat or preventing these common conditions. We explore possible barriers to this approach, namely the lack of multiple product licences to treat each of these conditions and how these can be overcome by involving the patient in personalised decisions. We also discuss how opportunities are lost by patients with multiple medical conditions being referred to specialists, primarily interested in one specific problem, with little motivation to treat or prevent conditions outside their remit. We explore how these problems might be related to time and financial restraints or simply a lack of awareness of evidence published in journals related to other specialities. As specialists, we often pride ourselves on providing "personalised" or "patient centred" care, but we can only truly be doing so if we assess the specific needs of the patient across a range of conditions. As part of personalised care in T2DM, we routinely prescribe statins, angiotensin converting enzyme inhibitors and metformin, often with poor compliance. In this paper we explore whether the licensed daily PDE5 inhibitor tadalafil should be added routinely to this list as it will potentially improve and prevent bothersome symptoms and improve compliance with other medications.
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Affiliation(s)
- Geoffrey Hackett
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust, England, UK.,School of Health and Life Sciences, Aston University, England, UK.
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20
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Stedman M, Livingston M, Albanese M, Hackett G, Heald AH. Hypogonadism is not being sufficiently recognised in 99% of general practices/family doctor surgeries. Int J Clin Pract 2020; 74:e13445. [PMID: 31713967 DOI: 10.1111/ijcp.13445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
| | - Mark Livingston
- Black Country Pathology Services, Walsall Manor Hospital, Walsall, UK
| | - Marco Albanese
- Herzzentrum Hirslanden Zentralschweiz, Luzern, Switzerland
| | - Geoff Hackett
- Department of Sexual Urology, Heartlands Hospital, Birmingham, UK
| | - Adrian H Heald
- The School of Medicine and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Department of Diabetes and Endocrinology, Salford Royal Hospital, Salford, UK
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21
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Hassanabad MF, Fatehi M. Androgen Therapy in Male Patients Suffering from Type 2 Diabetes: A Review of Benefits and Risks. Curr Diabetes Rev 2020; 16:189-199. [PMID: 30073928 DOI: 10.2174/1573399814666180731125724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 07/23/2018] [Accepted: 07/29/2018] [Indexed: 12/18/2022]
Abstract
BACKGROUND The current estimated numbers of patients with Type 2 Diabetes (T2D) is believed to be close to 10% of the whole populations of many geographical regions, causing serious concerns over the resulting elevated morbidity and mortality as well as the impact on health care systems around the world. In addition to negatively affecting the quality of life, diabetes is associated with cardiovascular and cerebrovascular complications, indicating that appropriate drug therapy should not only deal with metabolic dysfunction but also protect the vascular system, kidney function and skeletal muscle mass from the effects of the epigenetic changes induced by hyperglycaemia. OBJECTIVE To provide an insight into the management of hypogonadism associated with T2D, this review focuses on clinical observations related to androgen therapy in qualified diabetic patients, and discusses the lines of evidence for its benefits and risks. The potential interactions of testosterone with medicines used by patients with T2D will also be discussed. CONCLUSION From recent clinical findings, it became evident that a considerable percentage of patients suffering from T2D manifested low serum testosterone and experienced diminished sexual activity, as well as reduced skeletal muscle mass and lower bone density. Although there are some controversies, Testosterone Replacement Therapy (TRT) for this particular population of patients appears to be beneficial overall only if it is implemented carefully and monitored regularly.
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Affiliation(s)
- Mortaza F Hassanabad
- Alberta Institute of Diabetes and Department of Pharmacology, Faculty of Sciences, University of Alberta, Edmonton, Canada
| | - Mohammad Fatehi
- Alberta Institute of Diabetes and Department of Pharmacology, Faculty of Medicine, University of Alberta, Edmonton, Canada
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22
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The Complex Relationship Between Erectile Dysfunction and Hypogonadism in Diabetes Mellitus. CURRENT SEXUAL HEALTH REPORTS 2019. [DOI: 10.1007/s11930-019-00216-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Corona G, Rastrelli G, Di Pasquale G, Sforza A, Mannucci E, Maggi M. Testosterone and Cardiovascular Risk: Meta-Analysis of Interventional Studies. J Sex Med 2019; 15:820-838. [PMID: 29803351 DOI: 10.1016/j.jsxm.2018.04.641] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 03/09/2018] [Accepted: 04/11/2018] [Indexed: 01/23/2023]
Abstract
BACKGROUND The relationship between testosterone (T) and cardiovascular (CV) risk in men is conflicting. AIM To verify whether T therapy (TTh) represents a possible risk factor for CV morbidity and mortality. METHODS We conducted a random effect meta-analysis considering all available data from pharmaco-epidemiological studies as well as randomized placebo-controlled trials (RCTs). OUTCOMES CV mortality and morbidity were investigated. RESULTS After screening, 15 pharmaco-epidemiological and 93 RCT studies were considered. The analysis of pharmaco-epidemiological studies documented that TTh reduces overall mortality and CV morbidity. Conversely, in RCTs, TTh had no clear effect, either beneficial or detrimental, on the incidence of CV events. However, a protective role of TTh on CV morbidity was observed when studies enrolling obese (body mass index >30 kg/m2) patients were scrutinized (Mantel-Haenszel odds ratio 0.51 [95% CI 0.27-0.96]; P = .04), although this association disappeared when only high-quality RCTs were considered (Mantel-Haenszel odds ratio 0.64 [95% CI 0.22-1.88]; P = .42). Finally, an increased risk of CV diseases was observed in RCTs when T preparations were prescribed at dosages above those normally recommended, or when frail men were considered. CLINICAL IMPLICATIONS Pharmaco-epidemiological studies showed that TTh might reduce CV risk, but this effect was not confirmed when RCTs were considered. STRENGTHS & LIMITATIONS Meta-analysis of pharmaco-epidemiological studies indicates that TTh reduces overall mortality and CV morbidity. In addition, even in RCTs, a protective role of TTh on CV morbidity was envisaged when studies enrolling obese (body mass index >30 kg/m2) patients were considered. Pharmaco-epidemiological studies should be considered with caution due to the lack of completeness of follow-up and of the management of missing data. In addition, properly powered placebo-controlled RCTs with a primary CV end point, in men with late-onset hypo-gonadism, are not yet available. Finally, the duration of all studies evaluated in the present meta-analysis is relatively short, reaching a maximum of 3 years. CONCLUSIONS Data from RCTs suggest that treatment with T is not effective in reducing CV risk, however, when TTh is correctly applied, it is not associated with an increase in CV risk and it may have a beneficial effect in some sub-populations. Corona G, Rastrelli G, Di Pasquale G, et al. Testosterone and Cardiovascular Risk: Meta-Analysis of Interventional Studies. J Sex Med 2018;15:820-838.
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Affiliation(s)
- Giovanni Corona
- Endocrinology Unit, Medical Department, Azienda USL, Maggiore-Bellaria Hospital, Bologna, Italy
| | - Giulia Rastrelli
- Sexual Medicine and Andrology Unit, Department of Experimental, Clinical, and Biomedical Sciences, University of Florence, Florence, Italy
| | - Giuseppe Di Pasquale
- Cardiology Unit, Medical Department, Azienda USL, Maggiore-Bellaria Hospital, Bologna, Italy
| | - Alessandra Sforza
- Endocrinology Unit, Medical Department, Azienda USL, Maggiore-Bellaria Hospital, Bologna, Italy
| | - Edoardo Mannucci
- Sexual Medicine and Andrology Unit, Department of Experimental, Clinical, and Biomedical Sciences, University of Florence, Florence, Italy; Diabetes Agency, Careggi Hospital, Florence, Italy
| | - Mario Maggi
- Sexual Medicine and Andrology Unit, Department of Experimental, Clinical, and Biomedical Sciences, University of Florence, Florence, Italy.
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Ramachandran S, Hackett GI, Strange RC. Sex Hormone Binding Globulin: A Review of its Interactions With Testosterone and Age, and its Impact on Mortality in Men With Type 2 Diabetes. Sex Med Rev 2019; 7:669-678. [DOI: 10.1016/j.sxmr.2019.06.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 06/04/2019] [Accepted: 06/11/2019] [Indexed: 12/12/2022]
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Two Birds with One Stone: Regular Use of PDE5 Inhibitors for Treating Male Patients with Erectile Dysfunction and Cardiovascular Diseases. Cardiovasc Drugs Ther 2019; 33:119-128. [PMID: 30675707 DOI: 10.1007/s10557-019-06851-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Patients with cardiovascular disease (CVD) frequently have erectile dysfunction (ED) because the two conditions have similar risk factors and potential mechanisms. The therapeutic effect of CVD is strongly dependent upon long-term management of the condition. Patients with CVD tend to have poor medication compliance, and the coexistence of ED often discourages patients with CVD from continuing their long-term CVD management, thus worsening CVD treatment compliance. The two major reasons for poor compliance are that (i) the adverse effects of cardiovascular medications on erectile function drive people to reduce the prescribed dosage or even stop taking the medications to obtain satisfactory sexual arousal and (ii) a worsening mental state due to ED reduces medication compliance. The regular administration of phosphodiesterase-5 inhibitors (PDE5is) guarantees that the prescribed medication dosages are easy to comply with and that they improve the mental status of patients by enhancing their erectile function, resulting in improved long-term management of CVD through medication compliance. PDE5is themselves also play a role in reducing cardiovascular events and improving the prognosis. We recommend prescribing PDE5is for ED and suggest that PDE5i administration is a promising strategy to improve the long-term management of patients with both ED and CVD.
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Kirby M, Hackett G, Ramachandran S. Testosterone and the Heart. Eur Cardiol 2019; 14:103-110. [PMID: 31360231 PMCID: PMC6659039 DOI: 10.15420/ecr.2019.13.1] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 05/14/2019] [Indexed: 02/06/2023] Open
Abstract
The development of a subnormal level of testosterone (T) is not universal in ageing men, with 75% of men retaining normal levels. However, a substantial number of men do develop T deficiency (TD), with many of them carrying a portfolio of cardiovascular (CV) risk factors, including type 2 diabetes (T2D) and the metabolic syndrome. TD increases the risk of CV disease (CVD) and the risk of developing T2D and the metabolic syndrome. The key symptoms suggesting low T are sexual in nature, including erectile dysfunction (ED), loss of night-time erections and reduced libido. Many men with heart disease, if asked, admit to ED being present; a problem that is often compounded by drugs used to treat CVD. A large number of studies and meta-analyses have provided evidence of the link between TD and an increase in CVD and total mortality. Patients with chronic heart failure (CHF) who have TD have a poor prognosis and this is associated with more frequent admissions and increased mortality compared with those who do not have TD. Conversely, in men with symptoms and documented TD, T therapy has been shown to have beneficial effects, namely improvement in exercise capacity in patients with CHF, improvement of myocardial ischaemia and coronary artery disease. Reductions in BMI and waist circumference, and improvements in glycaemic control and lipid profiles, are observed in T-deficient men receiving T therapy. These effects might be expected to translate into benefits and there are more than 100 studies showing CV benefit or improved CV risk factors with T therapy. There are flawed retrospective and prescribing data studies that have suggested increased mortality in treated men, which has led to regulatory warnings, and one placebo-controlled study demonstrating an increase in coronary artery non-calcified and total plaque volumes in men treated with T, which is open for debate. Men with ED and TD who fail to respond to phosphodiesterase type 5 (PDE5) inhibitors can be salvaged by treating the TD. There are data to suggest that T and PDE5 inhibitors may act synergistically to reduce CV risk.
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Affiliation(s)
| | - Geoffrey Hackett
- Spire Little Aston Hospital Sutton Coldfield, UK.,Aston University Birmingham, UK
| | - Sudarshan Ramachandran
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust Birmingham, UK.,Department of Clinical Biochemistry, University Hospitals of North Midlands/Keele University/Staffordshire University Staffordshire, UK
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Malipatil NS, Yadegarfar G, Lunt M, Keevil B, Siddals K, Livingston M, Roberts S, Narayanan P, Rutter M, Gibson JM, Donn R, Hackett G, Jones TH, Heald A. Male hypogonadism: 14-year prospective outcome in 550 men with type 2 diabetes. Endocrinol Diabetes Metab 2019; 2:e00064. [PMID: 31294081 PMCID: PMC6613223 DOI: 10.1002/edm2.64] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/01/2019] [Accepted: 02/02/2019] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION Hypogonadism is more prevalent in men with type 2 diabetes (T2DM) (25%-40%) than in men without T2DM. Hypogonadism has been associated with poorer glycaemic outcomes and increased cardiovascular morbidity/mortality. We report a 14-year follow-up study to evaluate the influence of baseline testosterone level on T2DM outcomes. RESEARCH DESIGN AND METHODS A total of 550 men with T2DM underwent baseline total testosterone and dihydrotestosterone measurement by tandem mass spectrometry. Mean age of the men was 59.7 ± 12 (mean ± SD) years. Sex hormone-binding globulin (SHBG) was measured and free testosterone estimated. Patients were followed up between 2002 and 2016. Mean follow-up period was 12.2 ± 4 years using the Salford (UK) Integrated Health Records system. RESULTS Mean baseline total testosterone was 13.7 ± 5.8 nmol/L, and mean free testosterone was 245.7 ± 88.0 pmol/L. Mean for low total testosterone (<10 nmol/L) was 7.6 ± 2.0 nmol/L (n = 154) and 142 men had a free testosterone <190 pmol/L. During the 14-year duration follow-up, 22% of men experienced a myocardial infarction, 18% experienced a stroke, 11% developed angina, 14% underwent coronary revascularization. About 38% of the men initially recruited died. A lower total testosterone was associated with a higher body mass index (kg/m2) at follow-up: regression coefficient -0.30 (95% CI -0.445 to -0.157), P = 0.0001. The mortality rate was higher in patients with lower total testosterone compared to normal baseline total testosterone (5.0% vs 2.8% per year, P < 0.0001). A similar phenomenon was seen for dihydrotestosterone (4.3% vs 2.9% per year, P = 0.002) for normal vs low dihydrotestosterone) and for lower SHBG. Over the whole follow-up period 36.1% (143/396), men with normal baseline testosterone died vs 55.8% (86/154) of hypogonadal men at baseline. In Cox regression, the age-adjusted hazard ratio (HR) for higher mortality associated with low total testosterone was 1.54 (95% CI: 1.2-2.0, P < 0.002), corresponding to a 3.2 year reduced life expectancy for hypogonadal T2DM men. CONCLUSION Low testosterone and dihydrotestosterone levels are associated with higher all-cause mortality in T2DM men. Hypogonadal men with T2DM should be considered as very high risk for cardiovascular events/death.
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Affiliation(s)
- Nagaraj S. Malipatil
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
- Department of Diabetes and EndocrinologySalford Royal HospitalSalfordUK
| | - Ghasem Yadegarfar
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
- Heart Failure Research Centre (HF/PROVE), School of Public HealthIsfahan University of Medical SciencesIsfahanIran
| | - Mark Lunt
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
| | - Brian Keevil
- University of South Manchester NHS Foundation TrustManchesterUK
| | - Kirk Siddals
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
| | | | - Siriol Roberts
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
| | - Prakash Narayanan
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
| | - Martin Rutter
- Faculty of Biology, Medicine and HealthUniversity of ManchesterManchesterUK
- Manchester University NHS Foundation TrustManchesterUK
| | - J. Martin Gibson
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
- Department of Diabetes and EndocrinologySalford Royal HospitalSalfordUK
| | - Rachelle Donn
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
| | - Geoff Hackett
- Department of Sexual MedicineHeartlands HospitalBirminghamUK
| | - T. Hugh Jones
- Department of Oncology and MetabolismUniversity of SheffieldSheffieldUK
| | - Adrian Heald
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
- Department of Diabetes and EndocrinologySalford Royal HospitalSalfordUK
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König CS, Balabani S, Hackett GI, Strange RC, Ramachandran S. Testosterone Therapy: An Assessment of the Clinical Consequences of Changes in Hematocrit and Blood Flow Characteristics. Sex Med Rev 2019; 7:650-660. [PMID: 30926458 DOI: 10.1016/j.sxmr.2019.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 01/19/2019] [Accepted: 01/23/2019] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Clinical guidelines indicate that hematocrit should be monitored during testosterone replacement therapy (TTh), with action taken if a level of 0.54 is exceeded. AIM To consider the extent of changes in hematocrit and putative effects on viscosity, blood flow, and mortality rates after TTh. METHODS We focused on literature describing benefits and possible pitfalls of TTh, including increased hematocrit. We used data from the BLAST RCT to determine change in hematocrit after 30 weeks of TTh and describe a clinical case showing the need for monitoring. We consider the validity of the current hematocrit cutoff value at which TTh may be modified. Ways in which hematocrit alters blood flow in the micro- and macro-vasculature are also considered. MAIN OUTCOME MEASURES The following measures were assessed: (i) change in hematocrit, (ii) corresponding actions taken in clinical practice, and (iii) possible blood flow changes following change in hematocrit. RESULTS Analysis of data from the BLAST RCT showed a significant increase in mean hematocrit of 0.01, the increase greater in men with lower baseline values. Although 0 of 61 men given TTh breached the suggested cutoff of 0.54 after 30 weeks, a clinical case demonstrates the need to monitor hematocrit. An association between hematocrit and morbidity and mortality appears likely but not proven and may be evident only in patient subgroups. The consequences of an increased hematocrit may be mediated by alterations in blood viscosity, oxygen delivery, and flow. Their relative impact may vary in different vascular beds. CONCLUSIONS TTh can effect an increased hematocrit via poorly understood mechanisms and may have harmful effects on blood flow that differ in patient subgroups. At present, there appears no scientific basis for using a hematocrit of 0.54 to modify TTh; other values may be more appropriate in particular patient groups. König CS, Balabani S, Hackett GI, et al. Testosterone Therapy: An Assessment of the Clinical Consequences of Changes in Hematocrit and Blood Flow Characteristics. Sex Med Rev 2019;7:650-660.
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Affiliation(s)
- Carola S König
- College of Engineering, Design & Physical Sciences, Brunel University, London, England, United Kingdom
| | - Stavroula Balabani
- Faculty of Engineering Sciences, University College London, London, United Kingdom
| | - Geoffrey I Hackett
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust, West Midlands, England, United Kingdom
| | - Richard C Strange
- Institute for Science and Technology in Medicine, Keele University, Staffordshire, England, United Kingdom
| | - Sudarshan Ramachandran
- College of Engineering, Design & Physical Sciences, Brunel University, London, England, United Kingdom; Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, West Midlands, England, United Kingdom; Department of Clinical Biochemistry, University Hospitals of North Midlands / Faculty of Health Sciences, Staffordshire University, Staffordshire, England, United Kingdom.
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Abstract
The cardiovascular system is particularly sensitive to androgens, but some controversies exist regarding the effect of testosterone on the heart. While among anabolic abusers, cases of sudden cardiac death have been described, recently it was reported that low serum level of testosterone was correlated with increased risk of cardiovascular diseases (CVD) and mortality rate. This review aims to evaluate the effect of testosterone on myocardial tissue function, coronary artery disease (CAD), and death. Low testosterone level is associated with increased incidence of CAD and mortality. Testosterone administration in hypogonadal elderly men and women has a positive effect on cardiovascular function and improved clinical outcomes and survival time. Although at supraphysiologic doses, androgen may have a toxic effect, and at physiological levels, testosterone is safe and exerts a beneficial effect on myocardial function including mechanisms at cellular and mitochondrial level. The interaction with free testosterone and estradiol should be considered. Further studies are necessary to better understand the interaction mechanisms for an optimal androgen therapy in CVD.
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Affiliation(s)
- Vittorio Emanuele Bianchi
- Clinical Center Stella Maris, Laboratory of Physiology of Exercise, Strada Rovereta 42, 47891, Falciano, Republic of San Marino.
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30
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Hackett G. Metabolic Effects of Testosterone Therapy in Men with Type 2 Diabetes and Metabolic Syndrome. Sex Med Rev 2019; 7:476-490. [PMID: 30803918 DOI: 10.1016/j.sxmr.2018.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 12/10/2018] [Accepted: 12/13/2018] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Up to 40% of men with type 2 diabetes (T2DM) and metabolic syndrome (MetS) have hypogonadotrophic hypogonadism (HH). Men with HH are at increased risk of cardiovascular (CV) and all-cause mortality, as well as of the development of incident T2DM. AIM To review the current literature on the metabolic effects of testosterone therapy (TTh) in men with T2DM and MetS. METHODS We searched MEDLINE, Embase, and Cochrane Reviews for articles on T2DM, HH, testosterone deficiency, and CV and all-cause mortality published between May 2005 and July 2018, yielding 1817 articles, including 54 clinical trials and 32 randomized controlled trials (RCTs). MAIN OUTCOME MEASURES The main outcomes were glycemic control, insulin resistance, lipid profile, and metabolic markers associated with increased CV risk. RESULTS RCTs of TTh suggest significant benefits for sexual function, quality of life, glycemic control, insulin sensitivity, anemia, bone density, and fat and lean muscle mass that might be expected to translate into reduced long-term morbidity and mortality. Several longitudinal and observational studies suggest long-term sustained improvements in metabolic parameters and a trend toward reduced CV and all-cause mortality, especially in men at increased CV risk, such as those with T2DM and MetS. The greatest benefit is seen in those men treated with TTh to target levels and for longer durations. CONCLUSION Meta-analyses of RCTs, rather than providing clarification, may have further confused the issue by including underpowered studies of inadequate duration, multiple therapy regimens, some obsolete or withdrawn, and built-in bias in terms of studies included or excluded from analysis. Hackett G. Metabolic Effects of Testosterone Therapy in Men with Type 2 Diabetes and Metabolic Syndrome. Sex Med Rev 2019;7:476-490.
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Affiliation(s)
- Geoffrey Hackett
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust and University of Aston, Birmingham, United Kingdom.
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31
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Hackett G, Cole N, Mulay A, Strange RC, Ramachandran S. Long-term testosterone therapy in type 2 diabetes is associated with reduced mortality without improvement in conventional cardiovascular risk factors. BJU Int 2018; 123:519-529. [PMID: 30216622 DOI: 10.1111/bju.14536] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES To further characterize the beneficial impact of testosterone replacement therapy (TRT) on the association between mortality and hypogonadism (HG) in men with type 2 diabetes (T2DM), by determining, firstly, if changes in cardiovascular disease (CVD) risk factors after TRT play a role, secondly, whether the reduction in mortality is lost when TRT is discontinued and, finally, the presence of subgroups where benefit may be greater. MATERIALS AND METHODS We studied 857 men with T2DM, screened for the BLAST randomized controlled trial, over 3.8 years of follow-up. The men were stratified first by testosterone levels: group 1: total testosterone (TT) >12 nmol/L and free testosterone (FT) >0.25 nmol/L; Group 2: TT ≤12 nmol/L or FT ≤0.25 nmol/L. Group 2 was further stratified into those not on TRT (Group 2a) and those on TRT (Group 2b). Group 2b was further stratified by whether TRT was discontinued (Group 2b1) or not (Group 2b2). The principal outcome, mortality, was studied using Cox regression. RESULTS We found that TRT was not associated with improvements in CVD risk factors. CVD risk factors (baseline and changes during follow-up) were not associated with mortality. Men in Group 1 and Group 2b were found to have lower mortality (reference: Group 2a), even with CVD risk factors included in the regression models. Mortality was lower in men in Group 2b1 (6.2%) and Group 2b2 (0%) compared with those in Group 2a (16.9%). The lower mortality associated with Group 1 and Group 2b was observed primarily in older (>64.6 years) and less overweight (≤93.8 kg) men. CONCLUSIONS The benefits associated with normal testosterone levels and TRT (even after discontinuation) do not appear to be related to improvements in the CVD risk factors studied. In view of TRT having greater impact in men of lower weight, better outcomes may be achieved with concurrent TRT and weight reduction programmes.
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Affiliation(s)
- Geoffrey Hackett
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.,School of Health and Life Sciences, Aston University, Birmingham, UK
| | - Nigel Cole
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | | | - Richard C Strange
- Institute for Science and Technology in Medicine, Keele University Medical School, Stoke-on-Trent, UK
| | - Sudarshan Ramachandran
- Department of Clinical Biochemistry, University Hospitals of North Midlands/Faculty of Health Sciences, Staffordshire University, Stoke-on-Trent, UK.,College of Engineering, Design & Physical Sciences, Brunel University London, London, UK
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Kloner RA, Goldstein I, Kirby MG, Parker JD, Sadovsky R. Cardiovascular Safety of Phosphodiesterase Type 5 Inhibitors After Nearly 2 Decades on the Market. Sex Med Rev 2018; 6:583-594. [DOI: 10.1016/j.sxmr.2018.03.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/16/2018] [Accepted: 03/29/2018] [Indexed: 12/23/2022]
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Hackett G, Cole N, Mulay A, Strange RC, Ramachandran S. Long-Term Testosterone Therapy in Type 2 Diabetes Is Associated with Decreasing Waist Circumference and Improving Erectile Function. World J Mens Health 2018; 38:68-77. [PMID: 30209900 PMCID: PMC6920065 DOI: 10.5534/wjmh.180052m] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 12/17/2022] Open
Abstract
PURPOSE To describe the 4-year metabolic follow-up results from the BLAST study. MATERIALS AND METHODS Baseline hemoglobin A1c (HbA1c), weight, and waist circumference (WC) data were recorded in 185 men recruited for the BLAST randomised controlled trial (RCT) and erectile function (EF) scores were also available in an additional 48 men screened for the RCT. Intra/inter-group associations between these parameters and testosterone replacement therapy (TRT) were assessed at 1) end of the RCT (30 weeks), 2) open-label phase (82 weeks), and 3) final assessment via non-parametric statistics. RESULTS Improvement in HbA1c and weight at the end of the RCT and open-label phase in men on TRT was not maintained long-term. The convergence in HbA1c could have been due to incentivised care with HbA1c targets. Interestingly those on TRT at final assessment required fewer anti-diabetic agents. The weight increase in routine care may have been due to changes in diabetes medication or an increase in lean muscle mass. WC continued to decrease in men on TRT indicating possible reduction in visceral fat. Improvement in EF scores continued with long-term TRT, this was abolished when TRT was discontinued. CONCLUSIONS This study hints at benefits in glycaemic control, weight and WC, and long-term RCTs studying mechanisms of benefit and clinical outcomes are necessary. Our results also show that EF scores continued to improve with long-term TRT, even beyond the 6 months that we previously reported in the BLAST RCT.
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Affiliation(s)
- Geoffrey Hackett
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust, England, UK.,School of Health and Life Sciences, Aston University, England, UK.
| | - Nigel Cole
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust, England, UK
| | | | - Richard C Strange
- Institute for Science and Technology in Medicine, Keele University Medical School, England, UK
| | - Sudarshan Ramachandran
- Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, England, UK.,College of Engineering, Design and Physical Sciences, Brunel University London, England, UK.,Department of Clinical Biochemistry, University Hospitals of North Midlands/Faculty of Health Sciences, Staffordshire University, England, UK
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Hackett G. Type 2 Diabetes and Testosterone Therapy. World J Mens Health 2018; 37:31-44. [PMID: 30079639 PMCID: PMC6305869 DOI: 10.5534/wjmh.180027] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/03/2018] [Accepted: 04/08/2018] [Indexed: 01/24/2023] Open
Abstract
A third of men with type 2 diabetes (T2DM) have hypogonadotrophic hypogonadism (HH) and associated increased risk of cardiovascular and all-cause mortality. Men with HH are at increased risk of developing incident T2DM. We conducted MEDLINE, EMBASE, and COCHRANE reviews on T2DM, HH, testosterone deficiency, cardiovascular and all-cause mortality from May 2005 to October 2017, yielding 1,714 articles, 52 clinical trials and 32 randomized controlled trials (RCT). Studies with testosterone therapy suggest significant benefits in sexual function, quality of life, glycaemic control, anaemia, bone density, fat, and lean muscle mass. Meta-analyses of RCT, rather than providing clarification, have further confused the issue by including under-powered studies of inadequate duration, multiple regimes, some discontinued, and inbuilt bias in terms of studies included or excluded from analysis.
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Affiliation(s)
- Geoffrey Hackett
- Department of Urology, Good Hope Hospital, Heart of England Foundation Trust and University of Aston, Birmingham, UK.
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35
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Ramachandran S, Strange RC, Fryer AA, Saad F, Hackett GI. The association of sex hormone-binding globulin with mortality is mediated by age and testosterone in men with type 2 diabetes. Andrology 2018; 6:846-853. [PMID: 30006962 DOI: 10.1111/andr.12520] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 06/06/2018] [Accepted: 06/12/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Serum sex hormone-binding globulin levels have been associated with mortality in adult men with type 2 diabetes (T2DM). OBJECTIVES To confirm the association of serum sex hormone-binding globulin with mortality and then determine whether this association is mediated by age and total testosterone concentration. MATERIALS AND METHODS We studied 364 men (median age: 66 years) with T2DM over a median follow-up of 4.3 years using the Cox regression to study associations between sex hormone-binding globulin, age, total testosterone, and mortality. RESULTS Mortality was significantly and independently associated with sex hormone-binding globulin, age, and total testosterone. In pairwise combinations of age and sex hormone-binding globulin dichotomized by median values, the association of sex hormone-binding globulin with mortality was age-dependent. Relative to the combination of age >66 years/SHBG >35 nmol/L (mortality 22.5%), the other combinations were associated with significantly less mortality (mortality in men ≤66 years/SHBG ≤ 35 nmol/L was 3.23%). In men >66 years, SHBG ≤ 35 nmol/L was associated with decreased mortality (HR: 0.41, p = 0.037) compared with SHBG > 35 nmol/L. In men ≤66 years, there was no significant difference between those with sex hormone-binding globulin above or below the median (HR: 1.73, p = 0.56, reference: SHBG ≤ 35 nmol/L). TT < 12 nmol/L was associated with increased mortality in both age categories. Men >66 years with the reference combination of SHBG > 35 nmol/L and TT < 12 nmol/L (36.84%) nmol/L had significantly higher mortality than those with SHBG > 35 nmol/L and TT ≥ 12 (18.06%) and those with SHBG ≤ 35 nmol/L and TT < 12 nmol/L (13.79%). DISCUSSION Our data suggest sex hormone-binding globulin and total testosterone have particular impact on mortality in men aged over 66 years. Further, in older men, the combination of high sex hormone-binding globulin levels and low total testosterone is associated with greater risk than either high sex hormone-binding globulin or low total testosterone individually. CONCLUSIONS Our findings are compatible with data suggesting the importance of sex hormone-binding globulin lies in mediating free testosterone levels.
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Affiliation(s)
- S Ramachandran
- Department of Clinical Biochemistry, University Hospitals of North Midlands/Faculty of Health Sciences, Staffordshire University, Staffordshire, UK.,College of Engineering, Design & Physical Sciences, Brunel University, London, UK.,Department of Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, West Midlands, UK
| | - R C Strange
- Institute for Science and Technology in Medicine, Keele University, Staffordshire, UK
| | - A A Fryer
- Department of Clinical Biochemistry, University Hospitals of North Midlands/Faculty of Health Sciences, Staffordshire University, Staffordshire, UK.,Institute for Science and Technology in Medicine, Keele University, Staffordshire, UK
| | - F Saad
- Medical Affairs Andrology, Bayer AG, Berlin, Germany.,Gulf Medical University School of Medicine, Ajman, United Arab Emirates
| | - G I Hackett
- Department of Urology, University Hospitals Birmingham NHS Foundation Trust, West Midlands, UK.,School of Health and Life Sciences, Aston University, Birmingham, UK
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36
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Abstract
OBJECTIVE The decrease in testosterone levels that occurs with aging has become an important clinical issue both due to the growth of the geriatric population and patient interest in testosterone therapy. The decision to assess for testosterone deficiency and the ability to determine whether the benefits exceed the risks require a comprehensive evaluation of the aging patient. This article is part of a series of papers focused on the endocrinology of aging. This review addresses common issues needed for clinical decision making, including how to interpret test results, differential diagnosis, potential impact of testosterone treatment on insulin resistance and cardiovascular disease, and options for therapy. METHODS Papers reviewed were identified through literature searches conducted on PubMed. RESULTS Assessment of testosterone levels in the geriatric male requires an understanding of the limitations of the assay that is used, the symptoms associated with low testosterone, the impact of comorbid conditions on levels, and risks of therapy. Successful treatment requires setting realistic expectations of the benefits of replacement therapy. CONCLUSION While the prevalence of low testosterone concentrations is increased with aging, the common comorbidities such as obesity and diabetes may contribute to changes in testosterone levels. Clinical trial evidence shows modest benefit for treatment of low testosterone in the presence of symptoms. Assessment of the geriatric male should include evaluation of their testosterone level in the context of their functional status and comorbidities. ABBREVIATIONS CDC = Centers for Disease Control and Prevention; CI = confidence interval; CVD = cardiovascular disease; DXA = dual-energy X-ray absorptiometry; EMAS = European Male Aging Study; FDA = U.S. Food and Drug Administration; FHS = Framingham Heart Study; HDL = high-density lipoprotein; HOMA-IR = homeostasis model assessment of insulin resistance; LH = luteinizing hormone; OR = odds ratio; PSA = prostate-specific antigen; SHBG = sex hormone-binding globulin; T2DM = type 2 diabetes mellitus; vBMD = volumetric bone mineral density.
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37
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Saad F. Testosterone Therapy and Glucose Homeostasis in Men with Testosterone Deficiency (Hypogonadism). ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1043:527-558. [PMID: 29224109 DOI: 10.1007/978-3-319-70178-3_23] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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. Androgen deprivation therapy, commonly used in men with advanced prostate cancer, increases the risk of incident T2DM significantly.While short-term studies of T therapy in hypogonadal men with T2DM show only minor effects, long-term administration of T leads to meaningful and sustained improvements of glycemic control with parallel reductions in body weight and waist circumference. The more insulin-resistant and obese a patient is at the time of initiation of T therapy, the more improvements are noted. The observed effects are likely mediated by the increase in lean body mass invariably achieved by T therapy, as well as the improvement in energy and motivation, referred to as the psychotropic effects of T. As recommended by various guidelines, measuring T levels and, if indicated, restoring men's T levels into the normal physiological range can have a substantial impact on ameliorating T2DM in hypogonadal men.
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Affiliation(s)
- Farid Saad
- Global Medical Affairs Andrology, Bayer AG, Berlin, Germany. .,Gulf Medical University School of Medicine, Ajman, United Arab Emirates.
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38
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Huang F. Is a Previously or Currently Reduced Testosterone Level in Male Patients with Type 2 Diabetes Mellitus a Risk Factor for the Development of Coronary Artery Disease? A Systematic Review and Meta-analysis. Diabetes Ther 2018; 9:1061-1072. [PMID: 29619752 PMCID: PMC5984918 DOI: 10.1007/s13300-018-0415-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Indexed: 01/04/2023] Open
Abstract
INTRODUCTION We aimed to systematically investigate the association between testosterone level and cardiovascular risk in male patients with type 2 diabetes mellitus (T2DM) by comparing male T2DM patients with low testosterone levels to male T2DM patients with normal testosterone levels at baseline in terms of the number of cases of coronary artery disease (CAD). METHODS Online databases were carefully searched for studies relating to testosterone, diabetes mellitus, and cardiovascular risk by using the search terms 'testosterone,' 'diabetes mellitus,' and 'coronary artery/cardiovascular disease.' The only endpoint in this analysis was CAD/atherosclerosis/coronary plaque/major adverse coronary event prior to or following testosterone reduction at baseline. The analytical parameters used in this analysis were the risk ratio (RR) with the 95% confidence interval (CI), as obtained using the RevMan 5.3 software. RESULTS 3467 male patients with T2DM (1079 patients with a low testosterone level versus 2388 patients with a normal testosterone level) were included. The results of this analysis showed that when a random effects model was used, a higher risk of CAD/cardiovascular disease was observed in diabetic patients with a low testosterone level than in those with a normal testosterone level (RR 1.24, 95% CI 0.94-1.63; P = 0.13). However, the difference in risk was not statistically significant. Similarly, with a fixed effects model, a low testosterone level was associated with a higher CAD/cardiovascular risk of disease (RR 1.12, 95% CI 0.98-1.34; P = 0.08); in this case, the difference in risk between the T2DM patients with low and normal testosterone levels approached statistical significance. CONCLUSION A previously or currently reduced testosterone level was not found to be statistically significantly associated with a high risk of CAD/cardiovascular disease in male patients with T2DM. However, the difference in risk between the T2DM patients with low and normal testosterone levels was observed to approach statistical significance.
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Affiliation(s)
- Feng Huang
- Institute of Cardiovascular Diseases and Guangxi Key Laboratory Base of Precision Medicine in Cardio-cerebrovascular Diseases Control and Prevention, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China.
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39
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Abstract
New insights into G protein coupled receptor regulation of glucose metabolism by β-cells, skeletal muscle and liver hepatocytes identify GPRC6A as a potential therapeutic target for treating type 2 diabetes mellitus (T2D). Activating GPRC6A with a small molecule drug represents a potential paradigm-shifting opportunity to make significant strides in regulating glucose homeostasis by simultaneously correcting multiple metabolic derangements that underlie T2D, including abnormalities in β-cell proliferation and insulin secretion and peripheral insulin resistance. Using a computational, structure-based high-throughput screening approach, we identified novel tri-phenyl compounds predicted to bind to the venus fly trap (VFT) and 7-transmembrane (7-TM) domains of GPRC6A. Experimental testing found that these compounds dose-dependently stimulated GPRC6A signaling in a heterologous cell expression system. Additional chemical modifications and functional analysis identified one tri-phenyl lead compound, DJ-V-159 that demonstrated the greatest potency in stimulating insulin secretion in β-cells and lowering serum glucose in wild-type mice. Collectively, these studies show that GPRC6A is a “druggable” target for developing chemical probes to treat T2DM.
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40
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Peterson MD, Belakovskiy A, McGrath R, Yarrow JF. Testosterone Deficiency, Weakness, and Multimorbidity in Men. Sci Rep 2018; 8:5897. [PMID: 29651127 PMCID: PMC5897450 DOI: 10.1038/s41598-018-24347-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 03/28/2018] [Indexed: 01/03/2023] Open
Abstract
The purposes of this study were to evaluate the association between total testosterone (TT) deficiency and weakness on multimorbidity in men. Analyses were performed to examine the prevalence of multimobidity among young, middle-aged, and older men, with and without testosterone deficiency. Multivariate logistic models were also used to determine the association between age-specific TT tertiles and multimorbidity, adjusting for key sociodemographic variables, as well as a secondary analysis adjusted for grip strength. Multimorbidity was more prevalent among men with testosterone deficiency, compared to normal TT in the entire group (36.6% vs 55.2%; p < 0.001); however, differences were only seen within young (testosterone deficiency: 36.4%; normal TT: 13.5%; p < 0.001) and older men (testosterone deficiency: 75.0%; normal TT: 61.5%; p < 0.001). Robust associations were found between the age-specific low-TT (OR: 2.87; 95%CI: 2.14–3.83) and moderate-TT (OR: 1.67; 95%CI: 1.27–2.20) tertiles (reference high-TT) and multimorbidity. Secondary analysis demonstrated that both low TT (OR: 1.82; 95%CI: 1.29–2.55) and moderate-TT (OR: 1.31; 95%CI: 1.01–1.69) were associated with multimorbidity, even after adjusting for obesity (OR: 1.75; 95%CI: 1.07–2.87) and NGS (OR: 1.21 per 0.05 unit lower NGS). Low TT and weakness in men were independently associated with multimorbidity at all ages; however, multimorbidity was more prevalent among young and older men with testosterone deficiency.
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Affiliation(s)
- Mark D Peterson
- Department of Physical Medicine & Rehabilitation, Michigan Medicine, University of Michigan, Ann Arbor, USA.
| | - Aleksandr Belakovskiy
- Department of Family Medicine, Michigan Medicine, University of Michigan Research Service, Ann Arbor, USA
| | - Ryan McGrath
- Department of Physical Medicine & Rehabilitation, Michigan Medicine, University of Michigan, Ann Arbor, USA
| | - Joshua F Yarrow
- Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, USA.,Division of Endocrinology, Diabetes, and Metabolism, University of Florida College of Medicine, Gainesville, USA
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41
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Chrysant SG, Chrysant GS. Cardiovascular benefits and risks of testosterone replacement therapy in older men with low testosterone. Hosp Pract (1995) 2018; 46:47-55. [PMID: 29478348 DOI: 10.1080/21548331.2018.1445405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Many studies have shown that low testosterone (T) levels have been associated with increased risk for cardiovascular (CV) events, type 2 diabetes mellitus (T2DM), and strokes. In contrast, many other studies have demonstrated that normal T levels or the normalization of low T levels with testosterone replacement therapy (TRT) is associated with decreased incidence of CV events, T2DM, and strokes, besides improving sexual function and the quality of life. However, recent studies have indicated that TRT could lead to increased incidence of CV events and strokes. These latter studies have created a great controversy among physicians regarding these findings, who question the validity of their results. In order to get a better perspective on the current status of TRT in hypogonadal men, a focused Medline and EMBASE search of the English language literature was conducted between 2010 and 2017 using the terms hypogonadism, low Testosterone, cardiovascular disease, testosterone replacement therapy, benefits, risks, older men, mechanism of action, and 58 papers with pertinent information were selected and 48 papers were rejected. The selected papers will be discussed in this review. In conclusion, based on the current status of TRT, the majority of studies indicate that TRT is safe and is associated with prevention of CVD and strokes in hypogonadal men. However, the evidence is not uniform and the therefore, decision to administer TRT should be discussed with the patient till more definitive information becomes available.
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Affiliation(s)
- Steven G Chrysant
- a Department of Cardiology , University of Oklahoma Health Sciences Center , Oklahoma City , OK , USA
| | - George S Chrysant
- b Department of Cardiology , INTEGRIS Baptist Medical Center , Oklahoma City , OK , USA
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42
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Hackett G, Kirby M, Wylie K, Heald A, Ossei-Gerning N, Edwards D, Muneer A. British Society for Sexual Medicine Guidelines on the Management of Erectile Dysfunction in Men—2017. J Sex Med 2018; 15:430-457. [DOI: 10.1016/j.jsxm.2018.01.023] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/05/2018] [Accepted: 01/08/2018] [Indexed: 12/25/2022]
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43
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Becher EF. PDE5i and Cardiac Health: Why Are We Still Worried After So Many Years? J Sex Med 2018; 15:428-429. [DOI: 10.1016/j.jsxm.2018.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 01/17/2018] [Accepted: 01/30/2018] [Indexed: 10/17/2022]
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44
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Hackett G, Kirby M. Erectile dysfunction and testosterone deficiency as cardiovascular risk factors? Int J Clin Pract 2018; 72. [PMID: 29381240 DOI: 10.1111/ijcp.13054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 12/14/2017] [Indexed: 12/18/2022] Open
Abstract
Graham Jackson introduced the concept that erectile dysfunction was a marker for undiagnosed cardiovascular disease and future events. Unfortunately this had had modest impact on CVD management as ED is not incorporated into current risk calculators. In this paper, we examine recent evidence as to whether ED should be upgraded to a risk factor, especially with the high predictive value in younger men. In the Princeton 3 guidelines, he recognised the important impact of testosterone deficiency (TD) on all-cause and cardiovascular mortality. Recent evidence suggests that testosterone therapy to target levels and for sufficient duration, reduces cardiovascular events. In this paper, we also produce a case for testosterone deficiency to be considered as an independent risk factor. The evidence for inclusion of both ED and TD may now be stronger than accepted risk factors and have the advantages of being easily assessed, being quantitative, symptomatic and clinically relevant, especially in younger men.
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Affiliation(s)
| | - Michael Kirby
- The Centre for Research in Primary and Community Care, University of Hertfordshire, Hatfield, UK
- The Prostate Centre, London, UK
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45
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Dedov II, Mel'nichenko GA, Shestakova MV, Rozhivanov RV, Terehova AL, Zilov AV, Ladygina DO, Kurbatov DG. Guidelines for the Diagnosis and Treatment of testosterone deficiency (hypogonadism) in male patients with diabetes mellitus. ACTA ACUST UNITED AC 2017. [DOI: 10.14341/omet2017483-92] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Hypogonadism in men, defined as a reduction in serum testosterone in combination with characteristic symptoms and/or signs (described in detail later), is common in diabetes mellitus (DM). These recommendations do not cover the whole range of pathologies that cause the development of testosterone deficiency (hypogonadism), but focus on its clinical variants and characteristic for men with diabetes. The recommendations provide data on the prevalence of hypogonadism in diabetes, its etiology. In the section "diagnostics" the features of anamnesis of patients with hypogonadism with diabetes, the necessary methods of physical and laboratory examination are presented in detail. The risk factors and clinical consequences of hypogonadism are separately examined. In the section "choice of treatment methods", there are possible treatment options for such patients using various androgenic therapies, taking into account the needs of the man, maintaining his reproductive function and risk factors. Particular attention is paid to indications, contraindications and risk factors for androgen therapy in men with diabetes, especially in old age. With this in mind, principles for monitoring the treatment are developed. Based on a large number of studies, favorable effects of androgen replacement therapy in men with hypogonadism and diabetes have been demonstrated.
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46
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British Society for Sexual Medicine Guidelines on Adult Testosterone Deficiency, With Statements for UK Practice. J Sex Med 2017; 14:1504-1523. [DOI: 10.1016/j.jsxm.2017.10.067] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 10/14/2017] [Accepted: 10/19/2017] [Indexed: 01/01/2023]
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47
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Traish AM. Benefits and Health Implications of Testosterone Therapy in Men With Testosterone Deficiency. Sex Med Rev 2017; 6:86-105. [PMID: 29128268 DOI: 10.1016/j.sxmr.2017.10.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/06/2017] [Accepted: 10/06/2017] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Testosterone (T) deficiency (TD; hypogonadism) has deleterious effects on men's health; negatively affects glycometabolic and cardiometabolic functions, body composition, and bone mineral density; contributes to anemia and sexual dysfunction; and lowers quality of life. T therapy (TTh) has been used for the past 8 decades to treat TD, with positive effects on signs and symptoms of TD. AIM To summarize the health benefits of TTh in men with TD. METHODS A comprehensive literature search was carried out using PubMed, articles relevant to TTh were accessed and evaluated, and a comprehensive summary was synthesized. MAIN OUTCOME MEASURES Improvements in signs and symptoms of TD reported in observational studies, registries, clinical trials, and meta-analyses were reviewed and summarized. RESULTS A large body of evidence provides significant valuable information pertaining to the therapeutic value of TTh in men with TD. TTh in men with TD provides real health benefits for bone mineral density, anemia, sexual function, glycometabolic and cardiometabolic function, and improvements in body composition, anthropometric parameters, and quality of life. CONCLUSION TTh in the physiologic range for men with TD is a safe and effective therapeutic modality and imparts great benefits on men's health and quality of life. Traish AM. Benefits and Health Implications of Testosterone Therapy in Men With Testosterone Deficiency. Sex Med Rev 2018;6:86-105.
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Affiliation(s)
- Abdulmaged M Traish
- Department of Urology, Boston University School of Medicine, Boson, MA, USA.
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48
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Livingston M, Kalansooriya A, Hartland AJ, Ramachandran S, Heald A. Serum testosterone levels in male hypogonadism: Why and when to check-A review. Int J Clin Pract 2017; 71:e12995. [PMID: 28980739 PMCID: PMC5698762 DOI: 10.1111/ijcp.12995] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 08/03/2017] [Indexed: 12/16/2022] Open
Abstract
AIM Although "late onset hypogonadism", a condition that includes low testosterone and symptoms, is common in men over the age of 40 years, diagnosis is not clear cut amongst non-specialists. It is the aim of this review to provide an up to date picture of how this state should be diagnosed and managed. METHODS We aim to describe how primary and secondary hypogonadism should be excluded before the diagnosis of late onset hypogonadism is reached. As laboratory testosterone measurements are essential the current pitfalls such as inappropriate sample collection and the use of population derived reference ranges are expanded. We review current evidence to determine associations between late onset hypogonadism and morbidity/mortality and benefits following testosterone replacement therapy. RESULTS A review of the current evidence shows that late onset hypogonadism is associated with a worse metabolic state and increased mortality. Longitudinal studies have suggested that significant reductions in both symptoms and mortality are seen, especially in patients with type 2 diabetes. DISCUSSION This review highlights the importance of diagnosing late onset hypogonadism due to its association with morbidity/mortality and benefits following testosterone replacement. Thus, after making recommendations to ensure correct diagnosis we speculate whether the time has come to move away from population derived testosterone levels towards evidence based action limits.
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Affiliation(s)
| | | | | | - Sudarshan Ramachandran
- Department of Clinical BiochemistryHeart of England NHS Foundation TrustSutton ColdfieldUK
| | - Adrian Heald
- Department of Endocrinology and DiabetesSalford Royal HospitalSalfordUK
- The School of Medicine and Manchester Academic Health Sciences CentreUniversity of ManchesterManchesterUK
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49
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Hackett G, Cole N, Saghir A, Jones P, Strange RC, Ramachandran S. Testosterone replacement therapy: improved sexual desire and erectile function in men with type 2 diabetes following a 30-week randomized placebo-controlled study. Andrology 2017; 5:905-913. [DOI: 10.1111/andr.12399] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 06/13/2017] [Accepted: 06/14/2017] [Indexed: 01/20/2023]
Affiliation(s)
- G. Hackett
- Heart of England Foundation NHS Trust; Sutton Coldfield UK
| | - N. Cole
- Heart of England Foundation NHS Trust; Sutton Coldfield UK
| | - A. Saghir
- University of Birmingham; Birmingham UK
| | - P. Jones
- Institute for Science and Technology in Medicine; Keele University Medical School; Stoke-on-Trent UK
| | - R. C. Strange
- Institute for Science and Technology in Medicine; Keele University Medical School; Stoke-on-Trent UK
| | - S. Ramachandran
- Heart of England Foundation NHS Trust; Sutton Coldfield UK
- Department of Clinical Biochemistry; University Hospitals of North Midlands; Stoke-on-Trent UK
- Faculty of Health Sciences; Staffordshire University; Stoke-on-Trent UK
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50
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Hackett G. The Graham Jackson Memorial Lecture ISSM 2016—“The Man Who Knew Too Much”: Time to Recognize Erectile Dysfunction and Low Testosterone as Independent Risk Factors for Cardiovascular Disease. Sex Med Rev 2017; 5:256-265. [DOI: 10.1016/j.sxmr.2017.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 02/11/2017] [Accepted: 02/13/2017] [Indexed: 12/27/2022]
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