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https://www.readbyqxmd.com/read/29334412/stallion-semen-quality-depends-on-mhc-matching-to-teaser-mare
#1
E Jeannerat, E Marti, C Berney, F Janett, H Bollwein, H Sieme, D Burger, C Wedekind
The major histocompatibility complex (MHC) has repeatedly been found to influence mate choice of vertebrates, with MHC-dissimilar mates typically being preferred over MHC-similar mates. We used horses (Equus caballus) to test whether MHC matching also affects male investment into ejaculates after short exposure to a female. Semen characteristics varied much among stallions. Controlling for this variance with a full-factorial within-subject experimental design, we found that a short exposure to an MHC-dissimilar mare enhanced male plasma testosterone and led to ejaculates with elevated sperm numbers as compared to exposure to an MHC-similar mare...
January 15, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29319776/hypercalcemia-and-acute-renal-insufficiency-following-use-of-a-veterinary-supplement
#2
Marcelo Fernando Ronsoni, Heloisa de Cassia Dos Santos, Bruno da Silveira Colombo, Carina Gabriela Correa, Ana Paula Gomes Moritz, Marisa Helena Cesar Coral, Simone Van de Sande-Lee, Alexandre Hohl
A previously healthy 24 yo male presented with a two-month history of epigastric pain, nausea, vomiting, fatigue and malaise. He reported abuse of different substances, including an injectable veterinary vitamin compound, which contains high doses of vitamin A, D and E, and an oily vehicle that induces local edema and enhances muscle volume. Serum creatinine was 3.1 mg/dL, alanine transaminase 160 mg/dL, aspartate transaminase 11 mg/dL, total testosterone 23 ng/dL, 25-OH-vitamin D >150 ng/mL (toxicity >100), 1,25-OH-vitamin D 80 pg/mL, vitamin A 0...
October 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/29309588/transmembrane-bax-inhibitor-motif-6-tmbim6-protects-against-cisplatin-induced-testicular-toxicity
#3
Hyun-Kyoung Kim, Raj Kumar Yadav, Kashi Raj Bhattarai, Han-Wool Jung, Hyung-Ryong Kim, Han-Jung Chae
STUDY QUESTION: Is the Transmembrane BAX Inhibitor Motif-6 (TMBIM6) involved in the molecular mechanism by which cisplatin causes reproductive toxicity? SUMMARY ANSWER: TMBIM6 protects against cisplatin-induced testicular toxicity through up-regulation of heme oxygenase-1 (HO-1),-which maintains the levels of steroidogenic enzymes by decreaseing oxidative stress in the endoplasmic reticulum (ER). WHAT IS KNOWN ALREADY: Testosterone production is highly suppressed as a main complication of cisplatin (cis-diamminedichloroplatinum) anticancer therapy...
January 4, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29308430/sex-specific-consequences-of-neonatal-stress-on-cardio-respiratory-inhibition-following-laryngeal-stimulation-in-rat-pups
#4
Cécile Baldy, Simon Chamberland, Stéphanie Fournier, Richard Kinkead
The presence of liquid near the larynx of immature mammals triggers prolonged apneas with significant O2 desaturations and bradycardias. When excessive, this reflex (the laryngeal chemoreflex; LCR) can be fatal. Our understanding of the origins of abnormal LCR are limited; however, perinatal stress and male sex are risk factors for cardio-respiratory failure in infants. Because exposure to stress during early life has deleterious and sex-specific consequences on brain development it is plausible that respiratory reflexes are vulnerable to neuroendocrine dysfunction...
November 2017: ENeuro
https://www.readbyqxmd.com/read/29303051/a-novel-function-of-geranylgeraniol-in-regulating-testosterone-production
#5
Hsin-Jung Ho, Hitoshi Shirakawa, Puspo E Giriwono, Asagi Ito, Michio Komai
Isoprenoids play widely differing roles in various physiological processes in animals and plants. Geranylgeraniol (GGOH) is an isoprenoid found in plants, and is an important metabolic derivative in the isoprenoid/cholesterol synthesis pathway. Earlier studies focused on GGOH's ability to improve the side effects of bisphosphonate therapy by regulating the mevalonate pathway. More recently, the mevalonate pathway-independent effects of GGOH have been described, including anti-inflammatory, anti-tumorigenic, and neuroprotective activities...
January 5, 2018: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29299171/melatonin-up-regulates-the-expression-of-the-gata-4-transcription-factor-and-increases-testosterone-secretion-from-leydig-cells-through-ror%C3%AE-signaling-in-an-in-vitro-goat-spermatogonial-stem-cell-differentiation-culture-system
#6
Shou-Long Deng, Yan Zhang, Kun Yu, Xiu-Xia Wang, Su-Ren Chen, De-Ping Han, C Yan Cheng, Zheng-Xing Lian, Yi-Xun Liu
Because androgen function is regulated by its receptors, androgen-androgen receptor signaling is crucial for regulating spermatogenesis. Androgen is mainly testosterone secreted by testis. Based on the results of early studies in goats, the administration of melatonin over an extended period of time increases steroid production, but the underlying mechanism remains unclear. Here, we report the expression of the melatonin membrane receptors MT1 and MT2 and the retinoic acid receptor-related orphan receptor-alpha (RORα) in the goat testis...
December 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/29289577/longitudinal-serum-and-urine-steroid-metabolite-profiling-in-a-46-xy-infant-with-prenatally-identified-por-deficiency
#7
Hiroyuki Ono, Chikahiko Numakura, Keiko Homma, Tomonobu Hasegawa, Seiji Tsutsumi, Fumiko Kato, Yasuko Fujisawa, Maki Fukami, Tsutomu Ogata
Although POR deficiency (PORD) is assumed to be accompanied by excessive placental androgen accumulation and enhanced adrenal and testicular androgen production via the backdoor pathway as well as compromised testicular androgen production via the frontdoor pathway, there is no direct evidence for the flux of excessive placental androgens into the fetal circulation and for the production of dihydrotestosterone (DHT) via the backdoor pathway. We examined longitudinal serum and urine steroid metabolite profiles in a 46,XY infant with PORD who was prenatally identified because of the progressive fetal masculinization and maternal virilization from the mid-gestation and the presence of fetal radio-humeral synostosis and was confirmed to have compound heterozygous mutations of POR (p...
December 28, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29277698/interactions-between-observer-and-stimuli-fertility-status-endocrine-and-perceptual-responses-to-intrasexual-vocal-fertility-cues
#8
Grant M Ostrander, R Nathan Pipitone, Melanie L Shoup-Knox
Both men and women find female voices more attractive at higher fertility times in the menstrual cycle, suggesting the voice is a cue to fertility and/or hormonal status. Preference for fertile females' voices provides males with an obvious reproduction advantage, however the advantage for female listeners is less clear. One possibility is that attention to the fertility status of potential rivals may enable women to enhance their own reproductive strategies through intrasexual competition. If so, the response to having high fertility voices should include hormonal changes that promote competitive behavior...
December 22, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29260891/tnf-%C3%AE-antagonism-with-etanercept-enhances-penile-nos-expression-cavernosal-reactivity-and-testosterone-levels-in-aged-rats
#9
Tuğçe Demirtaş Şahin, Yusufhan Yazir, Tijen Utkan, Gulcin Gacar, Selenay Furat Rençber, Semil Selcen Gocmez
Erectile dysfunction (ED) has been reported to be associated with inflammation. This study investigated the effects of tumor necrosis factor alpha (TNF-α) inhibitor etanercept on penile neuronal nitric oxide synthase (nNOS) and endothelial nitric oxide synthase (eNOS) expressions, testosterone concentrations, neurogenic and endothelium-dependent relaxations of corpus cavernosum (CC), and circulating and cavernosal levels of inflammatory markers in aged rats. Animals were separated into control, aged, and etanercept-treated aged groups...
December 20, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29248935/potential-of-moringa-oleifera-in-the-treatment-of-benign-prostate-hyperplasia-role-of-antioxidant-defence-systems
#10
Ismail Ishola, Charles Anunobi, Kayode Yemitan, Olasunmbo Afolayan, Tobi Durojaiye
OBJECTIVE: This study sought to evaluate the protective effect of ethanolic leaf extract of Moringa Oleifera (M. oleifera ) on testosterone-induced benign prostatic hyperplasia (BPH) in male Sprague-Dawley rats. MATERIALS AND METHODS: BPH was induced in rats by administration of testosterone propionate (3 mg/kg, s.c., in olive oil) for 4 weeks. M. oleifera (50, 100 or 200 mg/kg), celecoxib (20 mg/kg) or M. oleifera (50 mg/kg) + celecoxib (20 mg/kg) were orally administered daily 15 min before testosterone...
December 17, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/29247772/chrysin-attenuates-testosterone-induced-benign-prostate-hyperplasia-in-rats
#11
Sherif M Shoieb, Ahmed Esmat, Amani E Khalifa, Ashraf B Abdel-Naim
Benign prostate hyperplasia (BPH) is a common age-related health problem affecting almost 3 out of 4 men in their sixties. Chrysin is a dietary phytoestrogen found naturally in bee propolis and various plant extracts. It possesses antioxidant, anti-inflammatory and anti-proliferative properties. The current study was conducted to explore the role chrysin plays in protection against testosterone-induced BPH in rats. On grounds of a preliminary experiment, a dose of chrysin (50 mg/kg) was chosen for further investigation...
December 13, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29240236/evaluation-of-osteoblast-differentiation-and-function-when-cultured-on-mesoporous-bioactive-glass-adsorbed-with-testosterone
#12
Kai Gao, Xiaoyan Wang, Qianqian Liu, Wei Chen, Gan Wang, Dongyi Zhang, Long Liu
Mesoporous bioactive glass (MBG), a kind of porous materials with great osteoconductive and osteoinductive ability, shows promising application in bone tissue engineering due to its high specific surface area, orderly channel structure and large pore volume. Here we reported that the proliferation, differentiation and mineralization were promoted in MC3T3-E1 cells cultured on MBG which adsorbed with testosterone (MBG/T). We found that transcriptional activity of Runx2 which is a critical transcription factor is increased in MC3T3-E1 cells cultured on MBG/T...
December 14, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29238244/influence-of-a-thermogenic-dietary-supplement-on-safety-markers-body-composition-energy-expenditure-muscular-performance-and-hormone-concentrations-a-randomized-placebo-controlled-double-blind-trial
#13
Grant M Tinsley, Stacie Urbina, Jacy Mullins, Jordan Outlaw, Sara Hayward, Matt Stone, Cliffa Foster, Colin Wilborn, Lem Taylor
Dietary supplementation is commonly employed by individuals seeking to improve body composition and exercise performance. The purpose of the present study was to examine the safety and effectiveness of a commercially available dietary supplement designed to promote thermogenesis and fat loss. In a randomized double-blind trial, participants were assigned to consume placebo or a multi-ingredient supplement containing caffeine, green tea extract, l-carnitine, evodiamine and other ingredients that purportedly enhance thermogenesis...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29230883/real-time-homonuclear-broadband-decoupled-pure-shift-cosy
#14
Veera Mohana Rao Kakita, Jagadeesh Bharatam
The present manuscript reports development and applications of real-time homonuclear broadband decoupled pure shift version of in-phase zero-quantum filtered COSY (PS-IPZF-COSY) and clean in-phase COSY (PS-CLIP-COSY) pulse schemes. In contrast to the conventional COSY schemes, these PS-versions provide enhanced spectral resolution and simplify the chemical shift correlation analysis of scalar coupled spins in complex organic molecules, which are exemplified for erythromycin A, estradiol and a mixture of estradiol and testosterone...
December 12, 2017: Magnetic Resonance in Chemistry: MRC
https://www.readbyqxmd.com/read/29225554/recent-developments-in-psychopharmaceutical-approaches-to-treating-female-sexual-interest-and-arousal-disorder
#15
REVIEW
Stephanie Both
Purpose of Review: This review summarizes the recent literature and empirical studies on psychopharmacological approaches to treating female sexual interest/arousal disorder (FSIAD). Recent Findings: Several new drugs for FSIAD that are intended to increase sexual responsiveness by influencing central excitatory and inhibitory neuromodulatory processes are under development. Studies on flibanserin resulted in the first approved medication for the treatment of low sexual desire in premenopausal women...
2017: Current Sexual Health Reports
https://www.readbyqxmd.com/read/29224095/sex-differences-in-muscle-wasting
#16
Lindsey J Anderson, Haiming Liu, Jose M Garcia
With aging and other muscle wasting diseases, men and women undergo similar pathological changes in skeletal muscle: increased inflammation, enhanced oxidative stress, mitochondrial dysfunction, satellite cell senescence, elevated apoptosis and proteasome activity, and suppressed protein synthesis and myocyte regeneration. Decreased food intake and physical activity also indirectly contribute to muscle wasting. Sex hormones also play important roles in maintaining skeletal muscle homeostasis. Testosterone is a potent anabolic factor promoting muscle protein synthesis and muscular regeneration...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29220342/effect-of-penetration-enhancers-on-the-percuaneous-delivery-of-hormone-replacement-actives
#17
John O Trimble, Bob Light
Transdermal compositions for hormone replacement are comprised of exogenous hormones that are biochemically similar to those produced endogenously by the ovaries or elsewhere in the body. In this work, estradiol, estriol, and testosterone were loaded in transdermal vehicles, prepared using one of three selected penetration enhancer mixtures: Vehicle 1 (olive oil and oleic acid), Vehicle 2 (isopropyl palmitate and lecithin), and Vehicle 3 (isopropyl myristate and lecithin). The influence of penetration enhancers on transdermal delivery was evaluated using Franz-type diffusion cells and Normal Human 3D Model of Epidermal Tissue...
November 2017: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/29214690/%C3%AE-lipoic-acid-inhibits-testicular-and-epididymal-oxidative-damage-and-improves-fertility-efficacy-in-arsenic-intoxicated-rats
#18
Papisetty Prathima, Ramanadhapuram Pavani, Sadepalli Sukeerthi, Sri Bhashyam Sainath
The present study evaluates the protective effect of α-lipoic acid (LA) against arsenic-induced testicular and epididymal oxidative damage in rats. Arsenic caused significant reduction in the reproductive organ weights, serum testosterone levels, testicular daily sperm count, epididymal sperm count, sperm motility, sperm viability, and sperm membrane integrity. Significant reduction in the activity levels of superoxide dismutase, catalase, and glutathione levels with a concomitant increase in the lipid peroxidation and protein carbonyl content in the testis and the cauda epididymis of arsenic-exposed rats...
December 7, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29200669/adrenal-mass-unusual-presentation-and-outcome
#19
Raghu Sampally Ramareddy, Anand Alladi
Aim: Adrenal mass may be functioning or nonfunctioning with varied clinical presentations. This study aimed to report the nature and management of uncommon adrenal mass and to review literature. Materials and Methods: This was an retrospective observational analysis of children with uncommon adrenal mass admitted during 2009-2015. Clinical features, investigations, and management of patients were analyzed. Results: Among six, two each were adolescent and neonate, and one each was young infant and prenatal...
July 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29194990/effect-of-testosterone-supplementation-on-nitroso-redox-imbalance-cardiac-metabolism-markers-and-s100-proteins-expression-in-the-heart-of-castrated-male-rats
#20
N Regouat, A Cheboub, M Benahmed, A Belarbi, F Hadj-Bekkouche
The aim of this study was to investigate the effects of castration and testosterone supplementation on nitroso-redox status, cardiac metabolism markers, and S100 proteins expression in the heart of male rats. 50 male Wistar rats were randomized into five groups with ten animals each: group 1: control intact (CON); group 2: sham operated (Sh-O); group 3: sesame oil-treated rats (S-oil); group 4: gonadoectomized (GDX); and group 5: gonadoectomized rats treated with testosterone (GDX-T) for 8 weeks. Our results showed myofibrillar weaving, apoptosis, inflammation, and fibrosis (as reflected by increased activity of MMP 9 and MMP 2) in the heart of gonadoectomized rats...
December 1, 2017: Andrology
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