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Testosterone and aging

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https://www.readbyqxmd.com/read/28098598/science-of-intracrinology-in-postmenopausal-women
#1
Fernand Labrie, Alain Bélanger, Georges Pelletier, Céline Martel, David F Archer, Wulf H Utian
OBJECTIVE: To illustrate the marked differences between classical endocrinology that distributes hormones to all tissues of the body through the bloodstream and the science of intracrinology, whereby each cell of each peripheral tissue makes a small and appropriate amount of estrogens and androgens from the inactive precursor dehydroepiandrosterone (DHEA), DHEA being mainly of adrenal origin. Because only the inactivated sex steroids are released in the blood, influence in the other tissues is avoided...
January 16, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28095043/serum-insulin-growth-factor-1-in-lebanese-schoolchildren-and-its-relation-to-vitamin-d-and-ferritin-levels
#2
Marie-Hélène Gannagé-Yared, Elise Chahine, Vanessa Farah, Tony Ibrahim, Nadia Asmar, Georges Halaby
OBJECTIVE: The aim of our study is to establish reference values for IGF-1 in Lebanese schoolchildren, and to evaluate the relationship between IGF-1 and age, gender, body mass index (BMI),vitamin D and ferritin. METHODS: In this cross-sectional study, 952 Lebanese schoolchildren (495 boys and 457 girls) aged 8-18 years, were included. Blood samples were taken from 10 schools of different socioeconomic status. Chemiluminescent immunoassays were used for IGF-1, 25(OH)D, testosterone and ferritin measurements...
January 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28095038/pure-androgen-producing-adrenal-tumor-clinical-features-and-pathogenesis
#3
Anli Tong, Jun Jiang, Fen Wang, Chunyan Li, Yushi Zhang, Xueyan Wu
OBJECTIVE: Pure androgen-secreting adrenal tumors (PASATs) are extremely rare, most reports involving only a single case. This study examined 9 cases of PASAT, with an attempt to characterize its clinical features and to explore their possible pathogenesis. METHODS: Clinical data of 9 patients with PASAT were retrospectively reviewed. Immunostaining were conducted, and Aryl hydrocarbon receptor-interacting protein (AIP) were amplified and directly sequenced. RESULTS: The onset age of the patients ranged from 3...
January 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28093793/the-sex-dependent-effects-of-letrozole-on-anxiety-in-middle-aged-rats
#4
Veronika Borbélyová, Emese Domonkos, Melinda Csongová, Mária Kačmárová, Daniela Ostatníková, Peter Celec, Július Hodosy
Aromatase catalyzes the conversion of testosterone to estradiol and is involved in physiological effects of sex hormones on brain functions. Animal experiments have shown that the aromatase inhibitor, letrozole, can induce anxiety in young ovariectomized females that are used as a model of aging. Whether or not these effects would be similar in intact middle-aged animals is unknown. The aim of our study was to analyze the effects of letrozole on anxiety in middle-aged rats of both sexes. Fifteen months old male and female rats were treated daily with either letrozole or vehicle for 2 weeks...
January 16, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28090348/changes-in-hba1c-and-circulating-and-adipose-tissue-androgen-levels-in-overweight-obese-women-with-polycystic-ovary-syndrome-in-response-to-electroacupuncture
#5
E Stener-Victorin, M Maliqueo, M Soligo, V Protto, L Manni, E Jerlhag, M Kokosar, A Sazonova, C J Behre, M Lind, C Ohlsson, K Højlund, A Benrick
AIM: Insulin sensitivity is ~40% lower in women with polycystic ovary syndrome (PCOS) than in controls. We tested the hypothesis that 5 weeks of electroacupuncture treatment improves glucose regulation and androgen levels in overweight/obese women with PCOS. MATERIAL AND METHODS: Seventeen women with PCOS, aged 18 to 38 years, with a body mass index (BMI) ≥25 kg/m(2) and diagnosed with PCOS were included in this experimental and feasibility study and subjected to five weeks of electroacupuncture treatments three times/week...
December 2016: Obesity Science & Practice
https://www.readbyqxmd.com/read/28081039/hiv-and-hypogonadism-a-new-challenge-for-young-aged-and-middle-aged-men-on-effective-antiretroviral-therapy
#6
Marie Lachâtre, Armelle Pasquet, Faïza Ajana, Benoit Soudan, Georges Lion, Laurence Bocket, Pauline Cornavin, Eric Senneville, Faroudy Boufassa, Antoine Chéret
Male hypogonadism is poorly defined in people living with HIV. Using a reliable free-testosterone assay, we examined the prevalence and risk factors of male hypogonadism among people living with HIV on effective antiretroviral therapy. Male hypogonadism was found in 12.4% of patients, twice the rate reported in the general population of the same age. Two risk thresholds, namely 5 years of antiretroviral therapy and 19% total body fat, may help to identify patients at risk.
January 28, 2017: AIDS
https://www.readbyqxmd.com/read/28079402/sexual-dysfunction-in-premenopausal-women-could-be-related-to-hormonal-profile
#7
Fabiene Bernardes Castro Vale, Bruna Barbosa Coimbra, Gerson Pereira Lopes, Selmo Geber
Female sexual dysfunction (FSD) is a public health problem that affects women's quality of life. Although the relationship between some hormones and the FSD has been described, it is not well established for all hormones. Therefore, the aim of our study was to evaluate the association between hormonal dysfunction and sexual dysfunction in premenopausal women. We performed a cross-sectional study with 60 patients with regular menstrual cycles, with age ranging from 18 to 44 years, with previous diagnosis of FSD...
January 12, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28078217/testosterone-replacement-in-the-infertile-man
#8
REVIEW
Ahmad Majzoub, Edmund Sabanegh
Hypogonadism is a common clinical condition affecting men of different age groups. In addition to its sexual consequences, it has several implications posing significant concerns for a man's health and well-being. Recent advances in testosterone (T) supplementation have facilitated hypogonadism treatment. Despite that, patients complaining of infertility or seeking conception are still hindered by the unfavorable effects supplemental T has on testicular function. Consequently, alternative approaches that can stimulate endogenous T production are favored...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28078213/adult-onset-hypogonadism-evaluation-and-role-of-testosterone-replacement-therapy
#9
REVIEW
Andrew J Davidiuk, Gregory A Broderick
Testosterone deficiency (TD) has become a growing concern in the field of men's sexual health, with an increasing number of men presenting for evaluation of this condition. Given the increasing demand for testosterone replacement therapy (TRT), a panel of experts met in August of 2015 to discuss the treatment of men who present for evaluation in the setting of low or normal gonadotropin levels and the associated signs and symptoms of hypogonadism. This constellation of factors can be associated with elements of both primary and secondary hypogonadism...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28078212/improvement-of-endothelial-function-following-initiation-of-testosterone-replacement-therapy
#10
Daniel A Shoskes, Barbara Tucky, Allan S Polackwich
BACKGROUND: Isolated recent studies have suggested an increased risk of heart attack as early as 3 months following testosterone replacement therapy (TRT). Such a rapid risk increase would likely require rapid deterioration of arterial endothelial function. Our goal was to assess arterial endothelial function in hypogonadal men prior to and at least 3 months after initiation of TRT. METHODS: Adult men were consented if they had symptoms of hypogonadism, a total testosterone <350 ng/dL, and planned to begin TRT...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28078211/a-case-series-of-the-safety-and-efficacy-of-testosterone-replacement-therapy-in-renal-failure-and-kidney-transplant-patients
#11
Ahmad Majzoub, Daniel A Shoskes
BACKGROUND: Hypogonadism is common in patients with renal dysfunction and does not always correct following transplantation. Recent studies show increased mortality for dialysis and transplant patients with low testosterone (T). These patients are often not treated due to concerns over efficacy and complications (both real and imagined). There is surprisingly scant literature supporting the use of T therapy in these patients. We wished to examine the results of T therapy in our patients with renal failure or following transplant...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28074679/vitamin-d-treatment-improves-levels-of-sexual-hormones-metabolic-parameters-and-erectile-function-in-middle-aged-vitamin-d-deficient-men
#12
Onder Canguven, Raidh A Talib, Walid El Ansari, Dany-Jan Yassin, Abdullah Al Naimi
BACKGROUND: The associations between serum vitamin D (VD), serum testosterone (TT) and metabolic syndrome are complex and with limited published research, particularly on the effects of VD treatment on sexual hormones, erectile function and the metabolic syndrome. OBJECTIVES: This study assessed whether a monthly high dose VD treatment for 12 months in VD deficient middle-aged men was associated with: changes in levels of sexual hormones, improvement of diabetes control and metabolic syndrome components, better erectile function [International Index of Erectile Function (IIEF)-5 questionnaire]; and changes in a prostate marker...
January 11, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28074436/intrafollicular-inflammatory-cytokines-but-not-steroid-hormone-concentrations-are-increased-in-naturally-matured-follicles-of-women-with-proven-endometriosis
#13
Gengxiang Wu, N A Bersinger, M D Mueller, M von Wolff
PURPOSE: The aim of this study was to assess whether the intrafollicular cytokine profile in naturally developed follicles is different in women with endometriosis, possibly explaining the lower reproductive outcome in endometriosis patients. METHODS: A matched case-control study was conducted at a university-based infertility and endometriosis centre. The study population included 17 patients with laparoscopically and histologically confirmed endometriosis (rAFS stages II-IV), each undergoing one natural cycle IVF (NC-IVF) treatment cycle between 2013 and 2015, and 17 age-matched NC-IVF women without diagnosed endometriosis (control group)...
January 10, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28074406/testosterone-and-jamaican-fathers-exploring-links-to-relationship-dynamics-and-paternal-care
#14
Peter B Gray, Jody Reece, Charlene Coore-Desai, Twana Dinall, Sydonnie Pellington, Maureen Samms-Vaughan
This paper investigates relationships between men's testosterone and family life in a sample of approximately 350 Jamaican fathers of children 18-24 months of age. The study recognizes the role of testosterone as a proximate mechanism coordinating and reflecting male life history allocations within specific family and cultural contexts. A sample of Jamaican fathers and/or father figures reported to an assessment center for an interview based on a standardized questionnaire and provided a saliva sample for measuring testosterone level...
January 10, 2017: Human Nature: An Interdisciplinary Biosocial Perspective
https://www.readbyqxmd.com/read/28073130/testosterone-plasma-concentration-is-associated-with-insulin-resistance-in-male-hypertensive-patients
#15
Gian Piero Carnevale Schianca, Gian Paolo Fra, Fabio Brustia, Mattia Bellan, Alice Pirovano, Alessandro Gualerzi, Michela Gentile, Antonello Gibbin, Mirta Menegatti, Ettore Bartoli, Mario Pirisi
Background: Low testosterone levels are a common finding among men with Type 2 Diabetes Mellitus (T2DM) and are inversely related to insulin resistance. Whether this relationship holds true in patients with hypertension, but normal glucose tolerance or prediabetes, is unclear. Methods: We recruited 87 male outpatients with essential arterial hypertension, aged 35-70 years. Anthropometric data were collected, an Oral Glucose Tolerance Test (OGTT) performed, and the homeostasis model assessment of insulin resistance (HOMA-IR) score calculated...
January 10, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28073108/salivary-testosterone-during-the-minipuberty-of-infancy%C3%A2
#16
Maria Contreras, Manish Raisingani, Donald Walt Chandler, William D Curtin, Julia Barillas, Preneet Cheema Brar, Kris Prasad, Bina Shah, Raphael David
BACKGROUND: The hypothalamic-pituitary-gonadal axis is transiently activated during the postnatal months in boys, a phenomenon termed "minipuberty" of infancy, when serum testosterone (T) increases to pubertal levels. Despite high circulating T there are no signs of virilization. We hypothesize that free T as measured in saliva is low, which would explain the absence of virilization. METHODS: We measured serum total T and free T in saliva using liquid chromatography-tandem mass spectrometry (LC-MS/MS) in 30 infant boys, aged 1-6 months, and in 12 adolescents, aged 11-17 years...
January 10, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28071240/teucrium-polium-hexane-extract-downregulated-androgen-receptor-in-testis-and-decreased-fertility-index-in-rats
#17
Aaa Al-Tikriti, E Al-Khateeb, M A Abbas
Teucrium polium L. (Lamiaceae) is a commonly used medicinal plant in folk medicine. Among several uses, T. polium is used to treat male fertility problems. This research was conducted to study the effect of T. polium on spermatogenesis, testosterone level, androgen receptor expression, and fertility in male rats. Administration of hexane extract for 6 days to aging rats increased testosterone level. When administered for 60 days, T. polium hexane extract downregulated androgen receptors, decreased sperm count without producing histological changes in different stages of spermatogenesis...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28071011/the-effects-of-a-low-calorie-diet-or-an-isocaloric-diet-combined-with-metformin-on-sex-hormones-in-obese-women-of-child-bearing-age
#18
Ewelina Swora-Cwynar, Magdalena Kujawska-Łuczak, Joanna Suliburska, Julita Reguła, Angelika Kargulewicz, Matylda Kręgielska-Narożna, Emilia Marcinkowska, Alina Kanikowska, Marzena Bielas, Marian Grzymisławski, Paweł Bogdański
BACKGROUND: The influence of weight loss treatment on sex hormones profile has been studied mainly in women with polycystic ovary syndrome (PCOS), but in obese premenopausal women without PCOS it still remains unclear. The aim of the study was to evaluate the effect of two approaches to obesity treatment on the serum level of sex hormones in obese women of child-bearing age without PCOS. METHODS: 77 obese Caucasian women (aged 31.2 ±8.3 years) were randomized into two groups: 39 women received a low-calorie diet (LC) and 38 received an isocaloric diet plus metformin (IM), for 12 weeks...
April 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28070801/a-comparison-of-sexual-function-in-women-with-polycystic-ovary-syndrome-pcos-whose-mothers-had-pcos-during-their-pregnancy-period-with-those-without-pcos
#19
Mahsa Noroozzadeh, Fahimeh Ramezani Tehrani, Mahnaz Bahri Khomami, Fereidoun Azizi
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in women during reproductive ages. Clinical symptoms associated with PCOS, such as hirsutism, acne, alopecia, obesity, and infertility, may lead to emotional morbidity and then impaired sexual function in those affected. During intrauterine development, the fetus may program the development of diseases during adulthood. In this study, we aimed to examine sexual function in women with PCOS, exposed to maternal androgen excess during their prenatal life compared to non-exposed PCOS patients...
January 9, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/28070708/delayed-treatment-of-undescended-testes-may-promote-hypogonadism-and-infertility
#20
Julia Rohayem, Alessandra Luberto, Eberhard Nieschlag, Michael Zitzmann, Sabine Kliesch
CONTEXT: Undescended testes at birth may be caused by testosterone deficiency during fetal development. It is unclear whether the process of failed descent contributes to permanent endocrine impairment. OBJECTIVES: To evaluate the impact of age at treatment of undescended testes on endocrine and spermatogenic testicular function in middle-aged men. PATIENTS AND METHODS: Reproductive hormone and semen data of 357 men with previously undescended testes were evaluated with respect to age at correction of testicular position and compared to those of 709 controls with eutopic testes at birth and normozoospermia...
January 9, 2017: Endocrine
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