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https://www.readbyqxmd.com/read/28214591/hyperglycemia-is-associated-with-reduced-testicular-function-and-activin-dysregulation-in-the-ins2-akita-mouse-model-of-type-1-diabetes
#1
Constanze C Maresch, Dina C Stute, Helen Ludlow, Hans-Peter Hammes, David M de Kretser, Mark P Hedger, Thomas Linn
Type 1 diabetes (T1D) is associated with subfertility in men. We hypothesised that this results from inhibitory effects of chronic hyperglycemia on testicular function and used the Ins2(Akita ±) mouse model to investigate this. Diabetic mice exhibited progressive testicular dysfunction, with a 30% reduction in testis weight at 24 weeks of age. Diabetic mice showed significantly reduced seminiferous tubule diameters and increased spermatogenic disruption, although testes morphology appeared grossly normal. Unexpectedly, serum LH and intra-testicular testosterone were similar in all groups...
February 15, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28214419/recommendations-for-gonadotoxicity-surveillance-in-male-childhood-adolescent-and-young-adult-cancer-survivors-a-report-from-the-international-late-effects-of-childhood-cancer-guideline-harmonization-group-in-collaboration-with-the-pancaresurfup-consortium
#2
REVIEW
Roderick Skinner, Renee L Mulder, Leontien C Kremer, Melissa M Hudson, Louis S Constine, Edit Bardi, Annelies Boekhout, Anja Borgmann-Staudt, Morven C Brown, Richard Cohn, Uta Dirksen, Alexsander Giwercman, Hiroyuki Ishiguro, Kirsi Jahnukainen, Lisa B Kenney, Jacqueline J Loonen, Lilian Meacham, Sebastian Neggers, Stephen Nussey, Cecilia Petersen, Margarett Shnorhavorian, Marry M van den Heuvel-Eibrink, Hanneke M van Santen, William H B Wallace, Daniel M Green
Treatment with chemotherapy, radiotherapy, or surgery that involves reproductive organs can cause impaired spermatogenesis, testosterone deficiency, and physical sexual dysfunction in male pubertal, adolescent, and young adult cancer survivors. Guidelines for surveillance and management of potential adverse effects could improve cancer survivors' health and quality of life. Surveillance recommendations vary considerably, causing uncertainty about optimum screening practices. This clinical practice guideline recommended by the International Late Effects of Childhood Cancer Guideline Harmonization Group in collaboration with the PanCareSurFup Consortium, developed using evidence-based methodology, critically synthesises surveillance recommendations for gonadotoxicity in male childhood, adolescent, and young adult (CAYA) cancer survivors...
February 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28202817/adaptive-shaping-of-the-behavioural-and-neuroendocrine-phenotype-during-adolescence
#3
Tobias D Zimmermann, Sylvia Kaiser, Michael B Hennessy, Norbert Sachser
Environmental conditions during early life can adaptively shape the phenotype for the prevailing environment. Recently, it has been suggested that adolescence represents an additional temporal window for adaptive developmental plasticity, though supporting evidence is scarce. Previous work has shown that male guinea pigs living in large mixed-sex colonies develop a low-aggressive phenotype as part of a queuing strategy that is adaptive for integrating into large unfamiliar colonies. By contrast, males living in pairs during adolescence become highly aggressive towards strangers...
February 22, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28186359/testosterone-supplementation-glucocorticoid-milieu-and-bone-homeostasis-in-the-ageing-male
#4
REVIEW
Vladimir Z Ajdžanović, Branko R Filipović, Branka T Šošić Jurjević, Verica Lj Milošević
Male ageing is entwined with a continuous fall in free testosterone levels, which contributes to the pathogenesis of bone loss. Glucocorticoid excess, either dependent on the ageing process or iatrogenically induced, was found to additionally impair the bone structure and metabolism. Cautious testosterone supplementation in this respect may positively affect the glucocorticoid milieu and bone homeostasis, while testosterone-induced changes in the glucocorticoid output could serve as a determinant of bone-related therapeutic outcome...
February 10, 2017: Fundamental & Clinical Pharmacology
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
#5
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/28185881/the-association-between-endogenous-testosterone-level-and-behavioral-flexibility-in-young-men-evidence-from-stimulus-outcome-reversal-learning
#6
Esther K Diekhof, Susanne Kraft
The capacity to flexibly adapt responding to unexpected changes in the environment is crucial for survival. Several neurotransmitters have been implicated in stimulus-outcome reversal learning. Yet, it remains an open question whether inter-individual differences in the neuroactive hormone testosterone may also be related to this type of behavioral flexibility. In this study we assessed the association between endogenous testosterone level and reversal learning in young healthy men. We used an observer reversal learning task, in which subjects viewed computer-based decisions between two stimuli, of which one was currently rewarded while the other one was punished...
February 6, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28178580/dual-hormone-stress-reactivity-predicts-downstream-war-zone-stress-evoked-ptsd
#7
Robert A Josephs, Adam R Cobb, Cynthia L Lancaster, Han-Joo Lee, Michael J Telch
BACKGROUND: The crucial role of the hypothalamic-pituitary-adrenal axis (HPA) in stress-related homeostasis suggests dysregulated HPA involvement in the pathogenesis of post-traumatic stress disorder (PTSD), yet most studies examining linkages between HPA axis measures and PTSD have yielded null findings. One untested explanation for this inconsistency is a failure to account for simultaneous adrenal and gonadal influence. Here we tested the singular and interactive effects of cortisol (CR) and testosterone (TR) reactivity as moderators of war-zone stress evoked PTSD emergence in the war-zone...
January 19, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28168722/androgen-deprivation-accelerates-the-prostatic-urethra-wound-healing-after-thulium-laser-resection-of-the-prostate-by-promoting-re-epithelialization-and-regulating-the-macrophage-polarization
#8
Xing-Jie Wang, Jian Zhuo, Guang-Heng Luo, Yi-Ping Zhu, Dian-Jun Yu, Rui-Zhe Zhao, Chen-Yi Jiang, Yun-Feng Shi, Hao Li, Lei Chen, Kui-Yuan Hao, Xia Han, Sheng Zhao, Xiao-Yu Bei, Yi-Feng Jing, Shu-Jie Xia
BACKGROUND: Complications after a thulium laser resection of the prostate (TmLRP) are related to re-epithelialization of the prostatic urethra. Since prostate growth and development are induced by androgen, the aim of this study was to determine the role and explore the mechanism of androgen in wound healing of the prostatic urethra. METHODS: Beagles that received TmLRPs were randomly distributed into a castration group, a testosterone undecanoate (TU) group, and a control group...
February 7, 2017: Prostate
https://www.readbyqxmd.com/read/28166959/the-effect-of-orexin-a-on-cyp17a1-and-cyp19a3-expression-and-on-oestradiol-oestrone-and-testosterone-secretion-in-the-porcine-uterus-during-early-pregnancy-and-the-oestrous-cycle
#9
Marta Kiezun, Nina Smolinska, Kamil Dobrzyn, Karol Szeszko, Edyta Rytelewska, Tadeusz Kaminski
Orexin A (OXA) is a hypothalamic neuropeptide known for its role in the regulation of food intake and arousal. It is also considered as a link between energy homeostasis and reproduction. Nevertheless, very little is known on the role of this peptide in the uterus. The objective of this study was to investigate OXA effect on oestradiol (E2), oestrone (E1), and testosterone (T) secretion by porcine endometrial and myometrial explants and gene expression of key steroidogenic enzymes involved in steroid production, namely cytochrome P450c17 (CYP17A1) and cytochrome P450 aromatase (CYP19A3), on days 10-11, 12 to 13, 15 to 16 and 27 to 28 of pregnancy and on days 10-11 of the cycle...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28166946/preventive-effects-of-supplemental-dietary-zinc-on-heat-induced-damage-in-the-epididymis-of-boars
#10
Zhaojian Li, Yansen Li, Xin Zhou, Yun Cao, Chunmei Li
Hyperthermia in boars reduces growth performance and sperm production. Zinc is an essential trace element in animal nutrition. Here we investigate the effects of dietary zinc on epididymal structure and function in Bama miniature pigs treated with heat exposure and investigate approaches to improve the reproductive performance in summer. Male Bama miniature pigs (n=18; aged 6 months; bodyweight=10.79±0.06kg) were randomly allocated to 3 groups: control group (Control), heat treatment group (HT), and the diet-supplemented and heat treatment group (H+Zn)...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28160669/effect-of-sex-hormone-levels-sex-body-mass-index-and-other-host-factors-on-human-craniofacial-bone-regeneration-with-bioactive-tricalcium-phosphate-grafts
#11
Christine Knabe, Aynur Mele, Peter Herbert Kann, Barbara Peleska, Doaa Adel-Khattab, Harald Renz, Alexander Reuss, Marc Bohner, Michael Stiller
Little is known regarding the associations between sex-hormone levels, sex, body mass index (BMI), age, other host factors and biomaterial stimulated bone regeneration in the human craniofacial skeleton. The aim of this study was to elucidate the associations between these factors and bone formation after sinus floor augmentation procedures (SFA) utilizing a bioactive tricalcium phosphate (TCP) bone grafting material. We conducted a prospective study in a human population in which 60 male and 60 female participants underwent SFA and dental implant placement using a staged approach...
January 28, 2017: Biomaterials
https://www.readbyqxmd.com/read/28149319/effects-of-the-social-environment-during-adolescence-on-the-development-of-social-behaviour-hormones-and-morphology-in-male-zebra-finches-taeniopygia-guttata
#12
Stefanie Bölting, Nikolaus von Engelhardt
BACKGROUND: Individual differences in behaviour are widespread in the animal kingdom and often influenced by the size or composition of the social group during early development. In many vertebrates the effects of social interactions early in life on adult behaviour are mediated by changes in maturation and physiology. Specifically, increases in androgens and glucocorticoids in response to social stimulation seem to play a prominent role in shaping behaviour during development. In addition to the prenatal and early postnatal phase, adolescence has more recently been identified as an important period during which adult behaviour and physiology are shaped by the social environment, which so far has been studied mostly in mammals...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28143456/short-term-effectiveness-of-low-dose-liraglutide-in-combination-with-metformin-versus-high-dose-liraglutide-alone-in-treatment-of-obese-pcos-randomized-trial
#13
RANDOMIZED CONTROLLED TRIAL
Mojca Jensterle, Nika Aleksandra Kravos, Katja Goričar, Andrej Janez
BACKGROUND: Liraglutide 3 mg was recently approved as an anti-obesity drug. Metformin is weight neutral, yet it could enhance the therapeutic index of GLP-1 agonist. We compared weight-lowering potential of liraglutide 1.2 mg in combination with metformin to liraglutide 3 mg monotherapy in obese PCOS. METHODS: Thirty obese women with PCOS (aged 33.1 ± 6.1 years, BMI 38.3 ± 5.4 kg/m(2)) were randomized to combination (COMBO) of metformin (MET) 1000 mg BID and liraglutide 1...
January 31, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28138310/efficacy-of-furosap-tm-a-novel-trigonella-foenum-graecum-seed-extract-in-enhancing-testosterone-level-and-improving-sperm-profile-in-male-volunteers
#14
Anuj Maheshwari, Narsingh Verma, Anand Swaroop, Manashi Bagchi, Harry G Preuss, Kiran Tiwari, Debasis Bagchi
Background: Dietary fiber rich fenugreek (Trigonella foenum-graecum) seeds have exhibited cardioprotective, hypolipidemic and other health benefits. Furosap (FS), an innovative, patented, 20% protodioscin-enriched extract was developed in our laboratory from fenugreek seeds. This study examined the free and total testosterone levels, sperm profile and morphology, sexual health, mood and mental alertness, and broad spectrum safety parameters of FS in 50 male volunteers following supplementation over a period of 12 weeks...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28133708/tadalafil-improves-lean-mass-and-endothelial-function-in-nonobese-men-with-mild-ed-luts-in-vivo-and-in-vitro-characterization
#15
Antonio Aversa, Simona Fittipaldi, Davide Francomano, Viviana M Bimonte, Emanuela A Greco, Clara Crescioli, Luigi Di Luigi, Andrea Lenzi, Silvia Migliaccio
PURPOSE: Phosphodiesterase type-5 inhibitor administration in diabetic men with erectile dysfunction (ED) is associated with reduced waist circumference. We evaluated potential effects of daily tadalafil administration on body composition and investigated its possible mechanism(s) of action in C2C12 skeletal muscle cells in vitro. METHODS: Forty-three men on stable caloric intake (mean age 48.5 ± 7; BMI 25.5 ± 0.9 kg/m(2)) complaining mild ED and/or low urinary tract symptoms (LUTS) were randomly assigned to receive tadalafil (TAD) 5 mg/daily (once-a-day=OAD-TAD; n = 23) or 20 mg on-demand (on-demand=OD-TAD; n = 20) for 2 months...
January 30, 2017: Endocrine
https://www.readbyqxmd.com/read/28130115/strategies-that-athletes-use-to-avoid-detection-of-androgenic-anabolic-steroid-doping-and-sanctions
#16
Hussain Alquraini, Richard J Auchus
Androgenic-anabolic steroids (AAS) are potent and widely used performance-enhancing substances (PES). Since the International Olympic Committee (IOC) began testing athletes for AAS in the 1970s, athletes and their teams have endeavored to beat the system to avoid doping violations and/or sanctions derived from positive test results. This review will discuss the strategies used to avoid detection based on the pharmacology, biochemistry, and genetics of AAS metabolism and testing principles. Another strategy used is to dope with testosterone under the guise that the athlete has a true medical condition that requires testosterone treatment, using the therapeutic use exemption (TUE) mechanism...
January 24, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28127501/hippocampal-serotonin-2a-receptor-immunoreactive-neurons-density-increases-after-testosterone-therapy-in-the-gonadectomized-male-mice
#17
Emsehgol Nikmahzar, Mehrdad Jahanshahi, Amir Ghaemi, Gholam Reza Naseri, Ali Reza Moharreri, Ahmad Ali Lotfinia
The change of steroid levels may also exert different modulatory effects on the number and class of serotonin receptors present in the plasma membrane. The effects of chronic treatment of testosterone for anxiety were examined and expression of 5-HT2A serotonergic receptor, neuron, astrocyte, and dark neuron density in the hippocampus of gonadectomized male mice was determined. Thirty-six adult male NMRI mice were randomly divided into six groups: intact-no testosterone treatment (No T), gonadectomy (GDX)-No T, GDX-Vehicle, GDX-6...
December 2016: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28126346/purification-and-identification-of-25-hydroxycholesterol-in-a-reptile-seasonal-variation-and-hormonal-regulation
#18
Varsha Singh, Manisha Priyam, Mamta Tripathy, Umesh Rai
The present in vitro study, for the first time, demonstrates the production of 25-hydroxycholestrol (25-HC) by testicular macrophages of a non-mammalian vertebrate. The ether extracts of testicular macrophage-conditioned medium (TMCM) were fractionated on a C18 reversed phase high-performance liquid chromatography (HPLC) column using methanol as the mobile phase. The mass spectrometry (MS) fragmentation pattern of HPLC-purified 25-HC was found to be identical to that of authentic 25-HC. Further, a significant seasonal variation in 25-HC concentration was observed with maximal level in regressed and minimal during breeding phase...
January 23, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28123489/hair-growth-effect-of-traditional-chinese-medicine-beautop-on-androgenetic-alopecia-patients-a-randomized-double-blind-placebo-controlled-clinical-trial
#19
Chien-Ying Lee, Cheng-Chung Wei, Min-Chien Yu, Ching-Che Lin, Shuenn-Jyi Sheu, Jen-Hung Yang, Chien-Ying Chiang, Kuang-Hua Huang, Yu-Hsiang Kuan
The aim of the present study was to evaluate the treatment effects of BeauTop in alopecia by observing its effectiveness in improving androgenetic alopecia. Hair growth was observed using a dermatoscope and clinical photos, and was scored by three dermatologists. Dermatologists evaluated and selected suitable participants for this study using the Norwood scale or Ludwig scale. A total of 40 participants with androgenetic alopecia were recruited in this study, and 32 participants completed the 6-month trial...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28102007/effects-of-diet-restriction-and-diet-complexity-on-life-history-strategies-in-side-blotched-lizards-uta-stansburiana
#20
Heather M Skinner, Andrew M Durso, Lorin A Neuman-Lee, Susan L Durham, Sarah D Mueller, Susannah S French
Organisms must balance energy invested into self-maintenance, reproduction, and somatic growth over their lifetime. In this study, the effects of diet restriction and diet complexity on side-blotched lizards (Uta stansburiana) were analyzed. Thirty male lizards, housed in the laboratory, were fed either an ad libitum or a restricted diet for 18 days (phase 1). Individuals from both treatments were then assigned to a diet of the same quantity of food that was either simple (only crickets) or complex (crickets, cockroaches, waxworms, and mealworms) for 35 days (phase 2)...
November 2016: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
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