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https://www.readbyqxmd.com/read/28078223/testosterone-therapy-and-prostate-cancer
#1
REVIEW
Alexander W Pastuszak, Katherine M Rodriguez, Taylor M Nguyen, Mohit Khera
The use of exogenous testosterone to treat hypogonadism in the men with a history of prostate cancer (CaP) remains controversial due to fears of cancer recurrence or progression. Due to the detrimental impact of hypogonadism on patient quality of life, recent work has examined the safety of testosterone therapy (TTh) in men with a history of CaP. In this review, we evaluate the literature with regards to the safety of TTh in men with a history of CaP. TTh results in improvements in quality of life with little evidence of biochemical recurrence or progression in men with a history of CaP, or de novo cancer in unaffected men...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28078222/testosterone-replacement-therapy-and-the-heart-friend-foe-or-bystander
#2
REVIEW
David S Lopez, Steven Canfield, Run Wang
The role of testosterone therapy (TTh) in cardiovascular disease (CVD) outcomes is still controversial, and it seems will remain inconclusive for the moment. An extensive body of literature has investigated the association of endogenous testosterone and use of TTh with CVD events including several meta-analyses. In some instances, a number of studies reported beneficial effects of TTh on CVD events and in other instances the body of literature reported detrimental effects or no effects at all. Yet, no review article has scrutinized this body of literature using the magnitude of associations and statistical significance reported from this relationship...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28078214/pharmacology-of-testosterone-replacement-therapy-preparations
#3
REVIEW
Jennifer J Shoskes, Meghan K Wilson, Michael L Spinner
The goal of testosterone replacement therapy (TRT) is to return serum testosterone levels to within physiologic range and improve symptoms in hypogonadal men. Some of the symptoms aimed to improve upon include decreased libido, erectile dysfunction, infertility, hot flashes, depressed mood, and loss of muscle mass or hair. Clinical use of testosterone for replacement therapy began approximately 70 years ago. Over the decades, numerous preparations and formulations have been developed primarily focusing on different routes of delivery and thus pharmacokinetics (PKs)...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28076306/parallel-diurnal-fluctuation-of-testosterone-androstenedione-dehydroepiandrosterone-and-17ohprogesterone-as-assessed-in-serum-and-saliva-validation-of-a-novel-liquid-chromatography-tandem-mass-spectrometry-method-for-salivary-steroid-profiling
#4
Marco Mezzullo, Alessia Fazzini, Alessandra Gambineri, Guido Di Dalmazi, Roberta Mazza, Carla Pelusi, Valentina Vicennati, Renato Pasquali, Uberto Pagotto, Flaminia Fanelli
BACKGROUND: Salivary androgen testing represents a valuable source of biological information. However, the proper measurement of such low levels is challenging for direct immunoassays, lacking adequate accuracy. In the last few years, many conflicting findings reporting low correlation with the serum counterparts have hampered the clinical application of salivary androgen testing. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) makes it possible to overcome previous analytical limits, providing new insights in endocrinology practice...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
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
#5
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/28073108/salivary-testosterone-during-the-minipuberty-of-infancy%C3%A2
#6
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/28067604/central-hypogonadism-due-to-a-giant-silent-fsh-secreting-atypical-pituitary-adenoma-effects-of-adenoma-dissection-and-short-term-leydig-cell-stimulation-by-luteinizing-hormone-lh-and-human-chorionic-gonadotropin-hcg
#7
Daniele Santi, Giorgia Spaggiari, Livio Casarini, Flaminia Fanelli, Marco Mezzullo, Uberto Pagotto, Antonio R M Granata, Cesare Carani, Manuela Simoni
We present a case report of an atypical giant pituitary adenoma secreting follicle-stimulating hormone (FSH). A 55-year-old patient presented for erectile dysfunction, loss of libido and fatigue. The biochemical evaluation showed very high FSH serum levels in the presence of central hypogonadism. Neither testicular enlargement nor increased sperm count was observed, thus a secretion of FSH with reduced biological activity was supposed. The histological examination after neuro-surgery showed an atypical pituitary adenoma with FSH-positive cells...
January 9, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28065723/social-context-dependent-relationships-between-mouse-dominance-rank-and-plasma-hormone-levels
#8
Cait M Williamson, Won Lee, Russell D Romeo, James P Curley
The associations between social status and endogenous testosterone and corticosterone have been well-studied across taxa, including rodents. Dominant social status is typically associated with higher levels of circulating testosterone and lower levels of circulating corticosterone but findings are mixed and depend upon numerous contextual factors. Here, we determine that the social environment is a key modulator of these relationships in Mus musculus. In groups of outbred CD-1 mice living in stable dominance hierarchies, we found no evidence of simple linear associations between social rank and corticosterone or testosterone plasma levels...
January 5, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28058854/effect-of-metformin-on-clinical-metabolic-and-endocrine-outcomes-in-women-with-polycystic-ovary-syndrome-a-meta-analysis-of-randomized-controlled-trial
#9
Roshni Patel, Gaurang Shah
OBJECTIVE: Metformin has been used as a treatment option for polycystic ovary syndrome (PCOS) since 1994; however, more than a hundred randomized clinical trials have reported controversial results regarding the efficacy of metformin in PCOS. This could be due to the small sample size and high variability in methodology between studies. The objective of the present meta-analysis was to determine the effect of metformin on clinical, metabolic, endocrine outcomes as compared to placebo in PCOS women...
January 6, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28056433/pelvic-organ-prolapse-and-endogenous-circulating-sex-steroids-in-postmenopausal-women-a-case-control-study
#10
Barbara Bodner-Adler, Klaus Bodner, Cora Schneidinger, Oliver Kimberger, Ksenia Halpern, Heinz Koelbl, Wolfgang Umek
OBJECTIVE: We compared sex steroid levels of postmenopausal patients with symptomatic pelvic organ prolapse (POP) with postmenopausal matched patients without any sign of POP. Furthermore, we evaluated a possible relationship between sex steroid levels and various urogynecologic parameters in cases with POP. Main outcome of interest were differences in circulating estradiol levels between the two groups. STUDY DESIGN: We conducted a case-control study and 46 postmenopausal women with symptomatic POP≥stage 2 were matched 1:1 with 46 urogynecologic healthy women...
December 26, 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28051945/sex-specific-effects-of-high-yolk-androgen-levels-on-constitutive-and-cell-mediated-immune-responses-in-nestlings-of-an-altricial-passerine
#11
Jaime Muriel, Lorenzo Pérez-Rodríguez, Manuel E Ortiz-Santaliestra, Marisa Puerta, Diego Gil
Avian embryos are exposed to yolk androgens that are incorporated into the egg by the ovulating female. These steroids can affect several aspects of embryo development, often resulting in increases in overall size or the speed of growth of different traits. However, several studies suggest that they also entail immune costs to the offspring. In this study, we explored whether variation in yolk androgen concentration affected several measures of the constitutive and cell-mediated immune axes in the spotless starling (Sturnus unicolor)...
January 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28051891/the-relationship-between-thyroid-function-and-metabolic-changes-in-chinese-women-with-polycystic-ovary-syndrome
#12
Dongmei Yin, Xiangyan Ruan, Xuanxuan Tian, Juan Du, Yue Zhao, Yamei Cui, Yanglu Li, Alfred O Mueck
OBJECTIVES: Aim was to evaluate endocrine, metabolic and thyroid parameters which could help to explore the relationship between thyroid function and metabolic changes in Chinese polycystic ovary syndrome (PCOS) patients. METHODS: Within a prospective study in PCOS patients compared with healthy women, thyroid parameters were assessed, as well as changes of endocrine, metabolic and clinical characteristics. RESULTS: 144 PCOS patients and 48 normo-ovulatory women matched by age as controls were included...
January 4, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28051885/elevated-serum-interferon-%C3%AE-inducible-protein-10-in-women-with-polycystic-ovary-syndrome
#13
Hongli Deng, Zhibo Li, Guang Liu, Xianhua Li, Yong Chen, Yong Zhang, Yifan Sun, Jinjian Fu
BACKGROUND: Interferon γ-induced protein 10 kDa (IP10/CXCL10) is a chemokine related to endocrine disorders; however, the serum concentrations of IP10 in women with polycystic ovary syndrome (PCOS) have not yet been reported. Therefore, we investigated whether IP10 is increased in PCOS patients and its potential clinical value in PCOS patients. METHODS: For this research, the serum IP10, glucose, insulin, high sensitivity C-reactive protein (hs-CRP), follicle-stimulating hormone (FSH), luteinizing hormone (LH) and total testosterone (TT) concentrations were measured in 60 women with PCOS and healthy controls...
January 4, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28044214/associations-of-obesity-and-physical-activity-with-serum-and-intratumoral-sex-steroid-hormone-levels-among-postmenopausal-women-with-breast-cancer-analysis-of-paired-serum-and-tumor-tissue-samples
#14
Yoichiro Kakugawa, Hiroshi Tada, Masaaki Kawai, Takashi Suzuki, Yoshikazu Nishino, Seiki Kanemura, Takanori Ishida, Noriaki Ohuchi, Yuko Minami
PURPOSE: It has been hypothesized that intratumoral estrogens may play important roles in the growth of breast cancer. However, few studies have investigated such intratumoral hormones, or their association with risk factors of breast cancer. METHODS: In this cross-sectional study, hormone levels in paired serum and tumor tissue samples from 146 postmenopausal women with breast cancer were measured by liquid chromatography-tandem mass spectrometry and compared between estrogen/progesterone (ER/PgR) subtypes...
January 2, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28044048/dietary-supplements-and-young-teens-misinformation-and-access-provided-by-retailers
#15
Maguire Herriman, Laura Fletcher, Alexis Tchaconas, Andrew Adesman, Ruth Milanaik
BACKGROUND AND OBJECTIVE: Despite the American Academy of Pediatrics' recommendations against pediatric use of creatine and testosterone boosters, research suggests that many young teenagers take these dietary supplements. Our objective was to determine to what extent health food stores would recommend and/or sell creatine and testosterone boosters to a 15-year-old boy customer. METHODS: Research personnel posing as 15-year-old high school athletes seeking to increase muscle strength contacted 244 health food stores in the United States via telephone...
January 2, 2017: Pediatrics
https://www.readbyqxmd.com/read/28043239/longitudinal-synergies-between-cortisol-reactivity-and-diurnal-testosterone-and-antisocial-behavior-in-young-adolescents
#16
Elizabeth J Susman, Melissa K Peckins, Jacey L Bowes, Lorah D Dorn
The aims were to identify the correspondence between simultaneous, longitudinal changes in cortisol reactivity and diurnal testosterone and to test the hypothesis that cortisol reactivity and diurnal testosterone interact so as to influence antisocial behavior. Participants were 135 children and young adolescents assessed at 6-month intervals over 1 year. Upon enrollment girls were age 8, 10, or 12 years (N = 69, M = 10.06 years) and boys were age 9, 11, or 13 years (N = 66, M = 10.94 years). Assessments included Tanner staging by a nurse, cortisol reactivity (Trier Social Stress Test for Children), diurnal testosterone, and interviews and questionnaires...
January 3, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28043110/obesity-as-a-risk-factor-for-prostatic-enlargement-a-retrospective-cohort-study-in-korea
#17
Jae Hung Jung, Song Vogue Ahn, Jae Mann Song, Se-Jin Chang, Kwang Jin Kim, Sung Won Kwon, Sang-Yoo Park, Sang-Baek Koh
PURPOSE: We aimed to evaluate obesity, a risk factor of metabolic syndrome, and its association with prostatic enlargement in a retrospective cohort in Korea. METHODS: Baseline data were obtained from the Korean Genome and Epidemiology Study on Atherosclerosis Risk of Rural Areas in the Korean General Population (KoGES-ARIRANG). Between March 2015 and November 2015, 2,127 male participants of KoGES-ARIRANG were invited to the Korean Prostate Health Council Screening Program, and 602 participants underwent urological examination, including serum prostate specific antigen measurement and transrectal ultrasonography, and completed the International Prostate Symptom Score questionnaire...
December 2016: International Neurourology Journal
https://www.readbyqxmd.com/read/28039871/high-salivary-testosterone-to-androstenedione-t-a4-ratio-and-adverse-metabolic-phenotypes-in-women-with-pcos
#18
J Münzker, L Lindheim, J Adaway, C Trummer, E Lerchbaum, T R Pieber, B Keevil, B Obermayer-Pietsch
BACKGROUND: Polycystic ovary syndrome (PCOS) is characterized by a combination of hormonal and metabolic disturbances, such as insulin resistance, glucose intolerance, anovulation and hyperandrogenism. Clinical phenotypes of PCOS show different patterns of steroid hormones that have been investigated to some extent. This study aimed to establish a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the quantification of salivary testosterone and androstenedione, and to describe the salivary testosterone to androstenedione (T/A4) ratio as a new tool for the assessment of hyperandrogenism and metabolic health...
December 31, 2016: Clinical Endocrinology
https://www.readbyqxmd.com/read/28039451/high-throughput-proteome-analysis-reveals-targeted-trpm8-degradation-in-prostate-cancer
#19
Swapna Asuthkar, Lusine Demirkhanyan, Samuel Robert Mueting, Alejandro Cohen, Eleonora Zakharian
The Ca2+-permeable ion channel TRPM8 is a hallmark of the prostate epithelium. We recently discovered that TRPM8 is an ionotropic testosterone receptor. This finding suggested that testosterone-induced TRPM8 activity regulates Ca2+ homeostasis in the prostate epithelium. Since androgens are significantly implicated in prostate cancer development, the role of the novel testosterone receptor TRPM8 in cancer was assessed in our study. Although TRPM8 mRNA levels increase at the early prostate cancer stages, we found that it is not proportionally translated into TRPM8 protein levels...
December 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/28018636/evolutionary-implications-of-interspecific-variation-in-a-maternal-effect-a-meta-analysis-of-yolk-testosterone-response-to-competition
#20
Alexandra B Bentz, Daniel J Becker, Kristen J Navara
Competition between conspecifics during the breeding season can result in behavioural and physiological programming of offspring via maternal effects. For birds, in which maternal effects are best studied, it has been claimed that exposure to increased competition causes greater deposition of testosterone into egg yolks, which creates faster growing, more aggressive offspring; such traits are thought to be beneficial for high-competition environments. Nevertheless, not all species show a positive relationship between competitive interactions and yolk testosterone, and an explanation for this interspecific variation is lacking...
November 2016: Royal Society Open Science
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