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Testosterone deficiency

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https://www.readbyqxmd.com/read/28195315/genetic-testing-facilitates-prepubertal-diagnosis-of-congenital-hypogonadotropic-hypogonadism
#1
Cheng Xu, Mariarosaria Lang-Muritano, Franziska Phan-Hug, Andrew A Dwyer, Gerasimos P Sykiotis, Daniele Cassatella, James Acierno, Moosa Mohammadi, Nelly Pitteloud
Neonatal micropenis and cryptorchidism raise the suspicion of congenital hypogonadotropic hypogonadism (CHH), a rare genetic disorder caused by GnRH deficiency. Low plasma testosterone levels and low gonadotropins during minipuberty provide a clinical diagnostic clue, yet these tests are seldomly performed in general practice. We report a male neonate with no family history of reproductive disorders who was born with micropenis and cryptorchidism. Hormonal testing at age 2.5 months showed low testosterone (0...
February 14, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28190856/virilism-and-ectopic-expression-of-hsd17b5-in-mature-cystic-teratoma
#2
Yohei Kawaguchi, Hiroko Mizuno, Mai Horikawa, Mayuko Kano, Kengo Yamada, Fumiko Yamakawa, Takashi Maekawa, Yuto Yamazaki, Keely M McNamara, Hironobu Sasano, Masayuki Hayashi
Mature cystic teratoma (MCT) is rarely involved in the overproduction of steroid hormones in contrast to sex cord stromal tumors. A 31-year-old woman visited our hospital with hirsutism, hoarseness, and hair loss from the scalp. Serum testosterone and free-testosterone levels were 7.3 ng/ml and 2.3 pg/ml, respectively, which were markedly in excess of the age adjusted female standard levels. Basal blood levels of steroid hormones and serum levels of 17-hydroxyprogesterone at 1 h after intravenous injection of adrenocorticotropic hormone demonstrated that 21-hydroxylase deficiency was not the underlying cause of her virilization...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28185917/increment-of-late-sodium-currents-in-the-left-atrial-myocytes-and-its-potential-contribution-to-the-increased-susceptibility-of-atrial-fibrillation-in-castrated-male-mice
#3
Yang Zhang, Hui-Min Wang, Ying-Zhe Wang, Yi-Yuan Zhang, Xue-Xin Jin, Yue Zhao, Jin Wang, Yi-Lin Sun, Gen-Long Xue, Peng-Hui Li, Qi-He Huang, Bao-Feng Yang, Zhen-Wei Pan
BACKGROUND: The incidence of atrial fibrillation (AF) is correlated with the declined levels of testosterone in elder men. Late sodium current may exert a role in AF pathogenesis. OBJECTIVE: In this study we explored the effect of testosterone deficiency on AF susceptibility and the therapeutic effect of late sodium current inhibitors in mice. METHODS: Male ICR mice (5-week old) were castrated to establish testosterone deficiency model. One month after castration, dihydrotestosterone (5mg/kg) was administered subcutaneously for 2 months...
February 6, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28183149/long-non-coding-rna-analysis-of-muscular-responses-to-testosterone-deficiency-in-huainan-male-pigs
#4
Baosong Xing, Xianxiao Bai, Hongxia Guo, Junfeng Chen, Liushuai Hua, Jiaqing Zhang, Qiang Ma, Qiaoling Ren, Huashuai Wang, Jing Wang
Long non-coding RNAs (lncRNAs) participated in growth and development of skeletal muscle; however, little is known about their response to testosterone deficiency in porcine skeletal muscle. We compared lean mass related carcass traits and lncRNAs expression files in Longissimus dorsi (LD) muscle between intact and castrated Huainan male pigs. The results showed that castration significantly reduced eye muscle area and lean meat percentage (P < 0.05), but increased the fat mass weight (P < 0.05). Meanwhile, 8946 lncRNAs, including 6743 intergenic lncRNAs (lincRNAs), 498 anti-sense lncRNAs, and 1705 intronic lncRNAs, were identified in porcine LD, among which, 385 lncRNAs were considered as the differentially expressed candidates between intact groups and castrated groups (q-value < 0...
February 9, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28179813/sex-differences-in-the-effects-of-androgens-acting-in-the-central-nervous-system-on-metabolism
#5
Jamie Morford, Franck Mauvais-Jarvis
One of the most sexually dimorphic aspects of metabolic regulation is the bidirectional modulation of glucose and energy homeostasis by testosterone in males and females. Testosterone deficiency predisposes men to metabolic dysfunction, with excess adiposity, insulin resistance, and type 2 diabetes, whereas androgen excess predisposes women to insulin resistance, adiposity, and type 2 diabetes. This review discusses how testosterone acts in the central nervous system, and especially the hypothalamus, to promote metabolic homeostasis or dysfunction in a sexually dimorphic manner...
December 2016: Dialogues in Clinical Neuroscience
https://www.readbyqxmd.com/read/28167128/testosterone-promotes-tube-formation-of-endothelial-cells-isolated-from-veins-via-activation-of-smad1-protein
#6
Pei Liu, Xiaosa Li, Fuhu Song, Ping Li, Jinzhi Wei, Qing Yan, Xingyan Xu, Jun Yang, Chuanxiang Li, Xiaodong Fu
Testosterone (T) deficiency is positively correlated with the increased incidence of cardiovascular disease. However, the effects of T on vascular endothelial cells remain obscure. Tube formation capacity is critical for vascular regeneration/repair and Smad1 plays an important role in these events. In this study, we investigated the effects of T on Smad1 activation and tube formation of cultured human umbilical endothelial cells (HUVECs). Our results showed that T rapidly increased endothelial Smad1 phosphorylation...
February 3, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28160246/hypogonadotropic-hypogonadism-in-males-with-glycogen-storage-disease-type-1
#7
Evelyn M Wong, Anna Lehman, Philip Acott, Jane Gillis, Daniel L Metzger, Sandra Sirrs
BACKGROUND: Glycogen storage disease type 1 is an autosomal recessive disorder with an incidence of 1 in 100,000. Long-term complications include chronic blood glucose lability, lactic academia, short stature, osteoporosis, delayed puberty, gout, progressive renal insufficiency, systemic or pulmonary hypertension, hepatic adenomas at risk for malignant transformation, anemia, vitamin D deficiency, hyperuricemic nephrocalcinosis, inflammatory bowel syndrome (type 1b), hypertriglyceridemia, and irregular menstrual cycles...
February 4, 2017: JIMD Reports
https://www.readbyqxmd.com/read/28141919/effect-of-corticosteroids-and-cyclophosphamide-on-sex-hormone-profiles-in-male-patients-with-systemic-lupus-erythematosus-and-systemic-sclerosis
#8
Laurent Arnaud, Annica Nordin, Hannes Lundholm, Elisabet Svenungsson, Erik Hellbacher, Johan Wikner, Agneta Zickert, Iva Gunnarsson
OBJECTIVE: Systemic Lupus Erythematosus (SLE) and Systemic Sclerosis (SSc) are predominantly female autoimmune diseases, therefore men are less well investigated. We analysed sex hormone levels in male patients with SLE and SSc comparatively to controls, in relation with use of corticosteroids and cyclophosphamide. METHODS: Sex hormone levels were measured from fasting blood samples in male patients with SLE (n=71), SSc (n=29) and compared to population-based age-matched male controls...
January 31, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28126642/effects-of-fenoterol-on-the-skeletal-system-depend-on-the-androgen-level
#9
Leszek Śliwiński, Urszula Cegieła, Maria Pytlik, Joanna Folwarczna, Aleksandra Janas, Małgorzata Zbrojkiewicz
BACKGROUND: The role of sympathetic nervous system in the osseous tissue remodeling is not clear enough. METHODS: The effects of fenoterol, a selective β2-adrenomimetic drug, on the skeletal system of normal and androgen deficient (orchidectomized) rats were studied in vivo. Osteoclastogenesis and mRNA expression in osteoblasts were investigated in vitro in mouse cell cultures. RESULTS: Fenoterol administered to animals with physiological androgen level unfavorably affected the skeletal system, damaging the bone microarchitecture...
September 29, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28118875/testosterone-deficiency-and-sleep-apnea
#10
REVIEW
Omar Burschtin, Jing Wang
Obstructive sleep apnea (OSA) is a common condition among middle-aged men and is often associated with reduced testosterone (T) levels. OSA can contribute to fatigue and sexual dysfunction in men. There is suggestion that T supplementation alters ventilatory responses, possibly through effects on central chemoreceptors. Traditionally, it has been recommended that T replacement therapy (TRT) be avoided in the presence of untreated severe sleep apnea. With OSA treatment, however, TRT may not only improve hypogonadism, but may also alleviate erectile/sexual dysfunction...
December 2016: Sleep Medicine Clinics
https://www.readbyqxmd.com/read/28097272/erratum-correction-of-the-references-for-figures-testosterone-therapy-in-men-with-testosterone-deficiency-are-we-beyond-the-point-of-no-return
#11
Abdulmaged Traish
[This corrects the article on p. 384 in vol. 57.].
January 2017: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/28090714/transplantation-of-cd51-stem-leydig-cells-a-new-strategy-for-the-treatment-of-testosterone-deficiency
#12
Zhi Jun Zang, Jiancheng Wang, Zhihong Chen, Yan Zhang, Yong Gao, Zhijian Su, Ying Tuo, Yan Liao, Min Zhang, Qunfang Yuan, Chunhua Deng, Mei Hua Jiang, Andy Peng Xiang
Stem Leydig cell (SLC) transplantation could provide a new strategy for treating the testosterone deficiency. Our previous study demonstrated that CD51 (also called integrin αv) might be a putative cell surface marker for SLCs, but the physiological function and efficacy of CD51(+) SLCs treatment remain unclear. Here, we explore the potential therapeutic benefits of CD51(+) SLCs transplantation and whether these transplanted cells can be regulated by the hypothalamic-pituitary-gonadal (HPG) axis. CD51(+) cells were isolated from the testes of 12-weeks-old C57BL/6 mice, and we showed that such cells expressed SLC markers and that they were capable of self-renewal, extensive proliferation, and differentiation into multiple mesenchymal cell lineages and LCs in vitro...
January 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/28086774/androgenic-effects-of-aqueous-and-methanolic-extracts-of-ficus-asperifolia-in-male-wistar-rats
#13
Pierre Watcho, Hermine Meli Watio, Modeste Wankeu-Nya, Esther Ngadjui, Patrick Deeh Defo, Pepin Alango Nkeng-Efouet, Telesphore Benoit Nguelefack, Albert Kamanyi
BACKGROUND: Androgen deficiency is a clinical syndrome resulting from the inability of the testes to produce physiological levels of testosterone due to a disturbance occurring at one or more levels of the hypothalamic-pituitary-testicular axis. The present study was undertaken to evaluate the androgenic properties of aqueous and methanolic extracts of Ficus asperifolia on normal and castrated immature rats. METHODS: Normal rats were treated either per os with aqueous or methanolic extract of Ficus asperifolia (100 mg/kg or 500 mg/kg b...
January 13, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28078216/testosterone-replacement-therapy-role-of-pituitary-and-thyroid-in-diagnosis-and-treatment
#14
REVIEW
Megan Crawford, Laurence Kennedy
Crosstalk among hormones characterizes endocrine function, and assessment of the hypogonadal man should take that into consideration. In men for whom testosterone deficiency is a concern, initial evaluation should include a thorough history and physical exam in which other endocrinopathies are being considered. Hypogonadism can be associated with both pituitary and thyroid dysfunction, for which appropriate biochemical evaluation should be undertaken in certain clinical scenarios. If low serum testosterone is confirmed measurement of luteinizing and follicle stimulating hormones (LH and FSH respectively) is essential to establish whether the hypogonadism is primary or secondary...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28078213/adult-onset-hypogonadism-evaluation-and-role-of-testosterone-replacement-therapy
#15
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/28074679/vitamin-d-treatment-improves-levels-of-sexual-hormones-metabolic-parameters-and-erectile-function-in-middle-aged-vitamin-d-deficient-men
#16
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/28070708/delayed-treatment-of-undescended-testes-may-promote-hypogonadism-and-infertility
#17
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
https://www.readbyqxmd.com/read/28065637/the-steroid-metabolite-16-%C3%AE-oh-androstenedione-generated-by-cyp21a2-serves-as-a-substrate-for-cyp19a1
#18
J Neunzig, M Milhim, L Schiffer, Y Khatri, J Zapp, A Sánchez-Guijo, M F Hartmann, S A Wudy, R Bernhardt
The 21-hydroxylase (CYP21A2) is a steroidogenic enzyme crucial for the synthesis of mineralo- and glucocorticoids. It is described to convert progesterone as well as 17-OH-progesterone, through a hydroxylation at position C21, into 11-deoxycorticosterone (DOC) and 11-deoxycortisol (RSS), respectively. In this study we unraveled CYP21A2 to have a broader steroid substrate spectrum than assumed. Utilizing a reconstituted in vitro system, consisting of purified human CYP21A2 and human cytochrome P450 reductase (CPR) we demonstrated that CYP21A2 is capable to metabolize DOC, RSS, androstenedione (A4) and testosterone (T)...
March 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28053949/effect-of-testosterone-replacement-therapy-on-cognitive-performance-and-depression-in-men-with-testosterone-deficiency-syndrome
#19
Hyun Jin Jung, Hong Seok Shin
PURPOSE: We aimed to evaluate the effect of testosterone replacement therapy (TRT) on cognitive function and depression in men with testosterone deficiency syndrome. MATERIALS AND METHODS: We carried out a prospective, placebo-controlled trial involving 106 men with total testosterone levels <3.3 ng/mL and symptoms of hypogonadism. Based on whether the patients received TRT (injection with 1,000 mg testosterone undecanoate) or a placebo (advice to modify lifestyle), the study population was divided into a TRT group (n=54) and a control group (n=52)...
December 2016: World Journal of Men's Health
https://www.readbyqxmd.com/read/28041602/serum-vitamin-d-and-sex-hormones-levels-in-men-and-women-the-multi-ethnic-study-of-atherosclerosis-mesa
#20
Di Zhao, Pamela Ouyang, Ian H de Boer, Pamela L Lutsey, Youssef M K Farag, Eliseo Guallar, David S Siscovick, Wendy S Post, Rita R Kalyani, Kevin L Billups, Erin D Michos
INTRODUCTION: 25-hydroxyvitamin D [25(OH)D] deficiency has been associated with low testosterone levels in men, but there are conflicting reports of its associations with sex hormones in women. Less is known about whether these associations are independent of adiposity and lifestyle factors, and whether they differ by race/ethnicity. AIM: To examine associations of 25(OH)D concentrations with sex hormone levels. METHODS: Cross-sectional analysis of 3017 men and 2929 women in a multi-ethnic cohort...
February 2017: Maturitas
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