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Testosterone deficiency

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https://www.readbyqxmd.com/read/27898988/lipid-accumulation-product-lap-as-an-index-of-metabolic-and-hormonal-disorders-in-aging-men
#1
I Rotter, A Rył, A Szylińska, W Pawlukowska, A Lubkowska, M Laszczyńska
Lipid accumulation product (LAP) is an index used for evaluating lipid overaccumulation in adults. Our study aimed at assessing associations between LAP and metabolic syndrome (MetS) and its components, age-related testosterone deficiency syndrome (TDS), low-density cholesterol (LDL), as well as HOMA-IR (insulin resistance ratio), insulin level in non-diabetics and total testosterone (TT), estradiol E2, dehydroepiandrosterone sulphate (DHEAs) and sex hormone-binding globulin (SHBG) in aging men.313 men aged 50-75 were surveyed with regard to the prevalence of diabetes (T2DM) and hypertension (HT)...
November 29, 2016: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/27897410/androgen-deprivation-causes-selective-deficits-in-the-biomechanical-leg-muscle-function-of-men-during-walking-a-prospective-case-control-study
#2
Ada S Cheung, Hans Gray, Anthony G Schache, Rudolf Hoermann, Daryl Lim Joon, Jeffrey D Zajac, Marcus G Pandy, Mathis Grossmann
BACKGROUND: Although muscle mass declines with testosterone deficiency in men, previous studies of muscle function have not demonstrated consistent deficits, likely due to relatively insensitive methodology. Our objective was to determine the effects of testosterone deprivation on the biomechanical function of individual lower-limb muscles. METHODS: We conducted a 12-month prospective, observational case-control study of 34 men newly commencing androgen deprivation treatment (ADT) for prostate cancer and 29 age-matched prostate cancer controls...
August 2, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27888021/heightened-aggressive-behavior-in-mice-deficient-in-aldo-keto-reductase-1a-akr1a
#3
Takujiro Homma, Ryusuke Akihara, Satoshi Okano, Mototada Shichiri, Yasukazu Yoshida, Ken-Ichi Yamada, Satoshi Miyata, Osamu Nakajima, Junichi Fujii
Aldehyde reductase (Akr1a) is involved in the synthesis of ascorbic acid (AsA) which may play a role in social behavior. In the current study, we performed analyses on Akr1a-deficient (Akr1a(-/-)) mice that synthesize about 10% as much AsA as wild-type mice from the viewpoint of intermale aggression. The use of the resident-intruder test revealed that the Akr1a(-/-) mice exhibited more aggressive phenotypes than wild-type control mice. Unexpectedly, however, the oral administration of additional AsA failed to reduce the aggressive behavior of Akr1a(-/-) mice, suggesting that the heightened aggression was independent of AsA biosynthesis...
November 22, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27872000/is-testosterone-a-food-for-the-brain
#4
REVIEW
Giacomo Ciocca, Erika Limoncin, Eleonora Carosa, Stefania Di Sante, Giovanni L Gravina, Daniele Mollaioli, Daniele Gianfrilli, Andrea Lenzi, Emmanuele A Jannini
INTRODUCTION: Testosterone is fundamental for psychological, sexological, cognitive, and reproductive aspects, and its lack or reduction largely impacts the quality of life in males and females. AIM: Therefore, the aim of this review is to describe the role of testosterone in the neurophysiology of the brain and related aspects regarding the quality of general and sexual life. METHODS: We listed and discussed the principal studies on the role of testosterone in the brain regarding sexual health, psychopathological conditions, and the elderly...
January 2016: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/27871967/prevalence-and-etiology-of-hypogonadism-in-young-men-with-chronic-spinal-cord-injury-a-cross-sectional-analysis-from-two-university-based-rehabilitation-centers
#5
Shannon D Sullivan, Mark S Nash, Eshetu Tefera, Emily Tinsley, Marc R Blackman, Suzanne Groah
BACKGROUND: Spinal cord injury (SCI) triggers an 'accelerated aging' process that may include development of hypogonadism, even among younger men with SCI; however, few studies have investigated the prevalence or etiology of hypogonadism in men with SCI. Young men with SCI are also at increased risk for developing metabolic dysfunction after injury, which may be exacerbated by concomitant testosterone (T) deficiency, thus identifying the prevalence and risk factors for T deficiency in men with SCI is important for their long-term health...
November 18, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/27856396/oestrogens-prolactin-hypothalamic-pituitary-gonadal-axis-and-schizophrenic-psychoses
#6
REVIEW
Anita Riecher-Rössler
Interest is growing in the potential effect of gonadal hormones, prolactin, and the hypothalamic-pituitary-gonadal axis in schizophrenic psychoses. Many studies from clinical, epidemiological, and fundamental research have confirmed that oestradiol, the main component of oestrogens, can have protective effects in schizophrenic psychoses. Furthermore, many patients with schizophrenic psychoses-even in the untreated prodromal stages-have hyperprolactinaemia and gonadal dysfunction, with oestrogen deficiency in women and testosterone deficiency in men...
November 11, 2016: Lancet Psychiatry
https://www.readbyqxmd.com/read/27855417/testosterone-deficiency-and-testosterone-treatment-in-older-men
#7
Farid Saad, Gabriele Röhrig, Stephan von Haehling, Abdulmaged Traish
Frailty is a clinical condition related to changes in metabolism, to sarcopenia, and to decline in muscle mass and strength, bone mineral density, and physical function with aging. The pathophysiology of frailty is multifactorial and associated with comorbidities. Testosterone is implicated in regulating metabolic functions, maintenance of muscle and bone, and inhibition of adipogenesis. In older individuals, reduced testosterone is thought to contribute to an altered state of metabolism, loss of muscle and bone, and increased fat, leading to sarcopenia, sarcopenic obesity, and frailty...
November 18, 2016: Gerontology
https://www.readbyqxmd.com/read/27853336/seventeen-alpha-hydroxylase-deficiency-associated-with-absent-gonads-and-myelolipoma-a-case-report-and-review-of-literature
#8
Mahmood Soveid, Ghanbar Ali Rais-Jalali
Congenital adrenal hyperplasia comprises a group of disorders resulting from defects in enzymes required for the synthesis of cortisol. The clinical presentation depends on the specific enzyme defect. We report a rare case of congenital adrenal hyperplasia due to 17 alpha-hydroxylase deficiency. A 26-year-old female patient referred with hypertension and hypokalemia. She also had primary amenorrhea and lack of sexual development. The karyotype was 46, XY. Hormonal evaluation showed low serum levels of all steroid hormones, requiring alpha-hydroxylation, which included cortisol, 17 alpha-hydroxy progesterone, dehydroepiandrosterone sulfate, estradiol, and testosterone...
November 2016: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/27852981/no-effect-of-testosterone-on-behavior-in-aged-wistar-rats
#9
Veronika Borbélyová, Emese Domonkos, Janka Bábíčková, Ľubomíra Tóthová, Martin Bosý, Július Hodosy, Peter Celec
In men, aging is accompanied by a gradual decline in androgen secretion. Studies suggest beneficial effects of endogenous and exogenous testosterone on affective behavior and cognitive functions. The aim of this study was to describe behavioral and cognitive sex differences and to analyze the effects of long-term androgen deficiency in aged male rats. Thirty-months old rats divided into three groups (males, females and males gonadectomized as young adults) underwent a battery of behavioral tests assessing locomotor activity, anxiety, memory, anhedonia, sociability and depression-like behavior...
November 12, 2016: Aging
https://www.readbyqxmd.com/read/27849622/novel-mutations-of-the-srd5a2-and-ar-genes-in-thai-patients-with-46-xy-disorders-of-sex-development
#10
Chupong Ittiwut, Jaturong Pratuangdejkul, Vichit Supornsilchai, Sasipa Muensri, Yodporn Hiranras, Taninee Sahakitrungruang, Suttipong Watcharasindhu, Kanya Suphapeetiporn, Vorasuk Shotelersuk
BACKGROUND: Abnormalities of dihydrotestosterone conversion [5α-reductase deficiency: online Mendelian inheritance in man (OMIM) 607306] or actions of androgens [partial androgen insensitivity syndrome (PAIS): OMIM 312300] during the 8th-12th weeks of gestation cause varying degrees of undervirilized external genitalia in 46, XY disorders of sex development (DSD) with increased testosterone production. The objective of the study was to determine clinical and genetic characteristics of Thai patients with 46, XY DSD...
November 16, 2016: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/27847912/testosterone-therapy-in-men-with-testosterone-deficiency-are-we-beyond-the-point-of-no-return
#11
REVIEW
Abdulmaged Traish
Although testosterone therapy in men with testosterone deficiency was introduced in the early 1940s, utilization of this effective treatment approach in hypogonadal men is met with considerable skepticism and resistance. Indeed, for decades, the fear that testosterone may cause prostate cancer has hampered clinical progress in this field. Nevertheless, even after considerable knowledge was acquired that this fear is unsubstantiated, many in the medical community remain hesitant to utilize this therapeutic approach to treat men with hypogonadism...
November 2016: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/27845128/re-fundamental-concepts-regarding-testosterone-deficiency-and-treatment-international-expert-consensus-resolutions
#12
Allen D Seftel
No abstract text is available yet for this article.
December 2016: Journal of Urology
https://www.readbyqxmd.com/read/27843074/testosterone-threshold-for-increased-cardiovascular-risk-in-middle-aged-and-elderly-men-a-locally-weighted-regression-analysis
#13
Pin-Wen Liao, Chia-Chang Wu, Kuan-Chou Chen, Fu-Shan Jaw, Hong-Jeng Yu, Shih-Ping Liu, Chen-Hsun Ho
INTRODUCTION: Although testosterone deficiency has a well-known association with increased risk of cardiovascular disease (CVD), the threshold remains to be determined. AIM: To investigate whether there is a discriminatory testosterone level below which the CVD risk increases. METHODS: The study included 876 men 45 to 74 years old who underwent a general health checkup. The Framingham Risk Score was used to estimate the 10-year CVD risk; a high-sensitivity C-reactive protein (hsCRP) level of at least 1 mg/L was considered an indicator of increased CVD risk...
November 11, 2016: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/27842977/reprint-of-steroid-5%C3%AE-reductase-2-deficiency
#14
REVIEW
Berenice B Mendonca, Rafael Loch Batista, Sorahia Domenice, Elaine M F Costa, Ivo J P Arnhold, David W Russell, Jean D Wilson
Dihydrotestosterone is a potent androgen metabolite formed from testosterone by action of 5α-reductase isoenzymes. Mutations in the type 2 isoenzyme cause a disorder of 46,XY sex development, termed 5α-reductase type 2 deficiency and that was described forty years ago. Many mutations in the encoding gene have been reported in different ethnic groups. In affected 46,XY individuals, female external genitalia are common, but Mullerian ducts regress, and the internal urogenital tract is male. Most affected males are raised as females, but virilization occurs at puberty, and male social sex develops thereafter with high frequency...
November 11, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27833295/successful-penile-reconstruction-following-prior-arteriovenous-loop-thrombosis-due-to-undiagnosed-protein-s-deficiency-and-exogenous-testosterone
#15
Parameswaran Anoop, Vithal Malmande, M N Prakash Kumar, Naveen Rao
Flap failure from microvascular thrombotic occlusion is a rare but significant cause for unsuccessful reconstructive surgery. We encountered thrombosis of arteriovenous loop in a patient undergoing phallus reconstruction. Further investigations revealed underlying previously asymptomatic hypercoagulable state due to protein-S deficiency in addition to long-term exogenous testosterone administration. Role of thrombophilia testing, thrombogenic potential of testosterone and the need for therapeutic perioperative anti-coagulation in such situations are described here...
May 2016: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/27832966/nonylphenol-induced-apoptosis-and-autophagy-involving-the-akt-mtor-pathway-in-prepubertal-sprague-dawley-male-rats-in-vivo-and-in-vitro
#16
Wenting Huang, Chao Quan, Peng Duan, Sha Tang, Wei Chen, Kedi Yang
This research explores the detrimental effect of nonylphenol (NP) to prepubertal Sprague-Dawley male rats in vivo and in vitro. Herein, forty-two 3-week-old rats were randomly divided into six groups, which were treated with NP (0, NAC, 25, 50, 100, 100+NACmg/kg/2d for 30 consecutive days) by intraperitoneal injection. NP induced a reduction in testosterone (15.58%, 17.23%, 13.38% in 25, 50, 100mg/kg group, respectively), triggered apoptosis related to oxidative stress, and disturbed mRNA and/or protein levels of PI3K, PTEN, PDK1, p-Akt, p-mTOR, p70S6K, caspase-3, LC3B...
December 12, 2016: Toxicology
https://www.readbyqxmd.com/read/27831823/aging-and-sex-hormones-in-males
#17
Maria Chiara Decaroli, Vincenzo Rochira
Several large cohort studies have disclosed the trajectories of sex steroids changes overtime in men and their clinical significance. In men the slow, physiological decline of serum testosterone (T) with advancing age overlaps with the clinical condition of overt, pathological hypogonadism. In addition, the increasing number of comorbidities, together with the high prevalence of chronic diseases, all further contribute to the decrease of serum T concentrations in the aging male. For all these reasons both the diagnosis of late-onset hypogonadism (LOH) in men and the decision about starting or not T replacement treatment remain challenging...
November 10, 2016: Virulence
https://www.readbyqxmd.com/read/27830100/scrotal-involvement-with-testicular-nonseminomatous-germ-cell-tumour
#18
C G O'Leary, J A Allen, F O'Brien, A Tuthill, D G Power
A 37-year-old male presented with a traumatic injury to the scrotal region necessitating emergency surgery. Evacuation of a haematoma and bilateral orchidectomy were performed. A left sided nonseminomatous germ cell tumour (NSGCT), predominantly yolk sac, was identified. Microscopic margins were positive for tumour. Initial tumour markers revealed an AFP of 22,854 ng/mL, HCG of <1 mIU/mL, and LDH of 463 IU/L. Eight weeks after surgery, AFP levels remained elevated at 11,646 ng/mL. Computed tomography (CT) scanning demonstrated left inguinal adenopathy, 1...
2016: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/27825414/surgical-therapy-of-17%C3%AE-hydroxylase-deficiency-in-30-patients
#19
Jian-Fa Jiang, Yan Deng, Wei Xue, Yan-Fang Wang, Qin-Jie Tian, Ai-Jun Sun
Objective To analyze the clinical features of 17α-hydroxylase deficiency and explore the appropriate timing and methods of surgical treatment. Methods We retrospectively analyzed the clinical data of patients with complete 17α-hydroxylase deficiency,containing Y chromosome material in their karyotype,adimitted to Peking Union Medical College Hospital from January 2004 to December 2014. Results Thirty patients with complete 17α-hydroxylase deficiency were included. Their social gender were all female and the mean age at diagnosis was (16...
October 10, 2016: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/27822338/stem-cell-therapy-for-the-treatment-of-leydig-cell-dysfunction-in-primary-hypogonadism
#20
REVIEW
Taylor C Peak, Nora M Haney, William Wang, Kenneth J DeLay, Wayne J Hellstrom
The production of testosterone occurs within the Leydig cells of the testes. When production fails at this level from either congenital, acquired, or systemic disorders, the result is primary hypogonadism. While numerous testosterone formulations have been developed, none are yet fully capable of replicating the physiological patterns of testosterone secretion. Multiple stem cell therapies to restore androgenic function of the testes are under investigation. Leydig cells derived from bone marrow, adipose tissue, umbilical cord, and the testes have shown promise for future therapy for primary hypogonadism...
October 26, 2016: World Journal of Stem Cells
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