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https://www.readbyqxmd.com/read/28306393/circannual-rhythm-of-plasmatic-vitamin-d-levels-and-the-association-with-markers-of-psychophysical-stress-in-a-cohort-of-italian-professional-soccer-players
#1
Giovanni Lombardi, Jacopo Antonino Vitale, Sergio Logoluso, Giovanni Logoluso, Nino Cocco, Giulio Cocco, Antonino Cocco, Giuseppe Banfi
Adequate plasmatic Vitamin D levels are crucial to maintain calcium homeostasis and bone metabolism both in the general population and in athletes. Correct dietary supply and a regular sun exposure are fundamental for allowing the desired and effective fitness level. Past studies highlighted a scenario of Vitamin D insufficiency among professional soccer players in several countries, especially in North Europe, whilst a real deficiency in athletes is rare. The typical seasonal fluctuations of Vitamin D are wrongly described transversally in athletes belonging to teams that play at different latitudes and a chronobiologic approach studying the Vitamin D circannual rhythm in soccer players has not been described yet...
March 17, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28295950/sulforaphane-attenuates-di-n-butylphthalate-induced-reproductive-damage-in-pubertal-mice-involvement-of-the-nrf2-antioxidant-system
#2
Xu-Ping Jiang, Jing-Yuan Tang, Zhen Xu, Peng Han, Zhi-Qiang Qin, Cheng-di Yang, Shang-Qian Wang, Min Tang, Wei Wang, Chao Qin, Yang Xu, Bai-Xin Shen, Wei-Min Zhou, Wei Zhang
di-N-butylphthalate (DBP) is a ubiquitous environmental pollutant used for plastic coating and in the cosmetics industry. It has toxic effects on body health, especially the male reproductive system. Here, we investigated the effects of DBP on the male reproductive system of pubertal mice and explored the protective role of sulforaphane (SFN). The results showed that DBP significantly reduced the anogenital distance, testicular weight, sperm count and motility, and plasma and testicular testosterone levels and significantly increased the oxidative stress, sperm abnormalities, and testicular cell apoptosis...
March 15, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/28295634/the-utility-of-salivary-testosterone-and-cortisol-concentration-measures-for-assessing-the-stress-responses-of-junior-athletes-during-a-sporting-competition
#3
Blair T Crewther, Zbigniew Obmiński, Joanna Orysiak, Emad A S Al-Dujaili
BACKGROUND: This study examined the utility of salivary testosterone (T) and cortisol (C) concentration measures for assessing the acute stress responses of junior athletes during a sporting competition. METHODS: Paired capillary blood and saliva samples were taken from 71 junior athletes (45 males, 26 females) before and after a simulated Olympic weightlifting competition. The concentration measures of salivary T and C were referenced against blood total T (TT) and C (TC) concentrations...
March 13, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28295537/investigation-of-techniques-to-measure-cortisol-and-testosterone-concentrations-in-coyote-hair
#4
Christopher J Schell, Julie K Young, Elizabeth V Lonsdorf, Jill M Mateo, Rachel M Santymire
Long-term noninvasive sampling for endangered or elusive species is particularly difficult due to the challenge of collecting fecal samples before hormone metabolite desiccation, as well as the difficulty in collecting a large enough sample size from all individuals. Hair samples may provide an environmentally stable alternative that provides a long-term assessment of stress and reproductive hormone profiles for captive, zoo, and wild mammals. Here, we extracted and analyzed both cortisol and testosterone in coyote (Canis latrans) hair for the first time...
March 10, 2017: Zoo Biology
https://www.readbyqxmd.com/read/28295462/ferulic-acid-prevents-lead-induced-testicular-oxidative-stress-and-suppressed-spermatogenesis-in-rats
#5
P Hasanein, F Fazeli, M Parviz, M Roghani
Lead affects multiple organ systems including testis. We investigated the effects of ferulic acid (FA) on lead-induced oxidative stress and spermatogenesis suppression in rats. Animals received lead acetate (500 mg/L in drinking water) and/or FA (50 mg/kg, i.g.) for eight weeks. Lead increased testicular malondialdehyde (MDA) and nitrite levels and decreased glutathione (GSH) content and catalase (CAT) activity. Lead decreased testis weight and testosterone level. Sperm parameters decreased in lead group...
March 10, 2017: Andrologia
https://www.readbyqxmd.com/read/28290964/anabolic-adaptations-occur-in-conscripts-during-basic-military-training-despite-high-prevalence-of-vitamin-d-deficiency-and-decrease-in-iron-status
#6
Vahur Ööpik, Saima Timpmann, Leho Rips, Indrek Olveti, Kersti Kõiv, Martin Mooses, Hanno Mölder, Ahti Varblane, Hele-Reet Lille, Helena Gapeyeva
INTRODUCTION: In Estonian Defense Forces that are drawn up on the basis of the conscription model considerable numbers of young men are prematurely discharged from military service for medical reasons, but causes leading to premature dropout of conscripts have not been systematically studied. However, one of the factors involved could be relatively demanding physical training that starts at the beginning of military service in the form of basic military training (BMT). Cumulative training and nontraining stresses experienced by conscripts during BMT may exceed their physiological adaptability and increase the probability of becoming prematurely discharged...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28290940/effects-of-combat-deployment-on-anthropometrics-and-physiological-status-of-u-s-army-special-operations-forces-soldiers
#7
Emily K Farina, Jonathan C Taylor, Gary E Means, Kelly W Williams, Nancy E Murphy, Lee M Margolis, Stefan M Pasiakos, Harris R Lieberman, James P McClung
INTRODUCTION: U.S. Army Special Operations Forces (SOF) soldiers deploy frequently and conduct military operations through special warfare and surgical strike capabilities. Tasks required to execute these capabilities may induce physical and mental stress and have the potential to degrade soldier physiological status. No investigations have longitudinally characterized whether combat deployment alters anthropometrics or biochemical markers of physiological status in a SOF population of frequent deployers...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28285354/endocrine-disruption-oxidative-stress-and-testicular-damage-induced-by-4-nonylphenol-in-clarias-gariepinus-the-protective-role-of-cydonia-oblonga
#8
Alaa El-Din H Sayed, Rania F K Ismail
Exposure to xenoestrogens like 4-nonylphenol (NP) is recognized by disrupting endocrine functions and causes reproductive dysfunction in male fish. The present study aimed at investigating the 4-nonylphenol propensity to induce oxidative stress and hormonal disturbances in male catfish and at studying the protective role of quince (Cydonia oblonga). To fulfill this aim, catfish Clarias gariepinus were exposed to pure 100 μg/L 4-NP and to quince the leaf extract added to 4-NP, both for 15 days. The 4-NP exposure induced a marked increase in 17ß-estradiol (E2), LH, and cortisol, while thyroid hormone (TSH, T3), testosterone (T), and FSH levels noticeably decreased; however, 4-NP had no effect on T4 level...
March 11, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28277894/the-influence-of-comorbidities-on-the-aging-males-symptoms-scale-in-patients-with-erectile-dysfunction
#9
Jorge Panach-Navarrete, José María Martínez-Jabaloyas
OBJECTIVES: To investigate if certain common age-related comorbidities are related with a positive aging males' symptoms (AMS) test outcome. METHODS: This was a multicentric, transversal, observational study carried out in a male population with erectile dysfunction. Comorbidities and testosterone levels were registered. The relationship between comorbidities, testosterone levels, and the AMS test outcomes was studied using the global score and the sub-scale score components...
March 9, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28277426/effect-of-cold-water-immersion-performed-on-successive-days-on-physical-performance-muscle-damage-and-inflammatory-hormonal-and-oxidative-stress-markers-in-volleyball-players
#10
Victor H de Freitas, Solange P Ramos, Maurício G Bara-Filho, Daniel G S Freitas, Danilo R Coimbra, Rubens Cecchini, Flávia A Guarnier, Fábio Y Nakamura
The aim of this study was to investigate the effects of daily cold water immersion (CWI) on physical performance, muscle damage, and inflammatory, hormonal, and oxidative stress markers in volleyball. Six players were submitted to CWI and six players to a placebo, during 5 training days. Thigh circumference, squat jump, and agility were measured on the 1, 3 and 6 days. On the 1 and 6 days, blood and saliva were collected for analysis of oxidative stress, muscle damage, and inflammatory and hormonal levels. Muscle soreness and countermovement jump were quantified daily...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28266735/testosterone-in-human-studies-modest-associations-between-plasma-and-salivary-measurements
#11
A E de Wit, F J Bosker, E J Giltay, C S de Kloet, K Roelofs, J van Pelt, B W J H Penninx, R A Schoevers
Testosterone is involved in many processes like aggression and mood disorders. As it may easily diffuse from blood into saliva, salivary testosterone is thought to reflect plasma free testosterone level. If so, it would provide a welcome noninvasive and less stressful alternative to blood sampling. Past research did not reveal consensus regarding the strength of the association, but sample sizes were small. This study aimed to analyse the association in a large cohort. In total, 2,048 participants (age range 18-65 years; 696 males and 1,352 females) were included and saliva (using cotton Salivettes) and plasma were collected for testosterone measurements...
March 7, 2017: Andrologia
https://www.readbyqxmd.com/read/28261838/radiofrequency-electromagnetic-radiation-from-cell-phone-causes-defective-testicular-function-in-male-wistar-rats
#12
A O Oyewopo, S K Olaniyi, C I Oyewopo, A T Jimoh
Cell phones have become an integral part of everyday life. As cell phone usage has become more widespread, concerns have increased regarding the harmful effects of radiofrequency electromagnetic radiation from these devices. The current study was undertaken to investigate the effects of the emitted radiation by cell phones on testicular histomorphometry and biochemical analyses. Adult male Wistar rats weighing 180-200 g were randomly allotted to control, group A (switched off mode exposure), group B (1-hr exposure), group C (2-hr exposure) and group D (3-hr exposure)...
March 6, 2017: Andrologia
https://www.readbyqxmd.com/read/28257863/effects-of-selenium-on-the-proliferation-apoptosis-and-testosterone-production-of-sheep-leydig-cells-in%C3%A2-vitro
#13
Lei Shi, Ruigao Song, Xiaolei Yao, Youshe Ren
The objective of this study was to investigate the effects of selenium (Se) on in vitro proliferation, apoptosis and testosterone production of sheep Leydig cells and its underlying mechanism. Leydig cells were collected from 8-month-old sheep and divided into four treatment groups (0, 2.0, 4.0 and 8.0 μmol/L Se). After treatment with Se for 48 h, the MTT and flow cytometric assay were used to detect cell proliferation and apoptosis. Testosterone level in the culture medium was determined by ELISA. The mRNA expression and protein abundance of cell cycle, apoptosis and testosterone synthesis-related genes were detected using real-time PCR and western blot analysis...
April 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28241996/ginkgo-biloba-extract-alleviates-oxidative-stress-and-some-neurotransmitters-changes-induced-by-aluminum-chloride-in-rats
#14
Naglaa El-Shahat Mohamed, Ahmed E Abd El-Moneim
In the present study, twenty four adult male albino rats were classified into four groups. The control group received normal diet and water; the second group was treated daily with oral dose of Ginkgo biloba (200 mg/kg body weight [b.wt]) for 3 mo; the third group was treated daily with oral dose of aluminum chloride (10 mg/kg b.wt) for 3 mo; and the fourth group was treated with both Ginkgo biloba and aluminum chloride (200 and 10 mg/kg b.wt, respectively) using a stomach tube for 3 mo. The results showed that administration of AlCl3 to rats induced significant increase (P < 0...
March 2017: Nutrition
https://www.readbyqxmd.com/read/28237812/physiological-and-behavioral-effects-of-exogenous-corticosterone-in-a-free-ranging-ectotherm
#15
Natalie M Claunch, Julius A Frazier, Camilo Escallón, Ben J Vernasco, Ignacio T Moore, Emily N Taylor
In the face of global change, free-ranging organisms are expected to experience more unpredictable stressors. An understanding of how organisms with different life history strategies will respond to such changes is an integral part of biodiversity conservation. Corticosterone (CORT) levels are often used as metrics to assess the population health of wild vertebrates, despite the fact that the stress response and its effects on organismal function are highly variable. Our understanding of the stress response is primarily derived from studies on endotherms, leading to some contention on the effects of chronic stress across and within taxa...
February 22, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28236448/gradual-decrease-in-spermatogenesis-caused-by-chronic-stress
#16
Lizbeth Juárez-Rojas, Rosa María Vigueras-Villaseñor, Fahiel Casillas, Socorro Retana-Márquez
Chronic stress induces decreased sperm motility, viability and concentration in stressed males. Also, stress modifies oxidative status and causes apoptosis in testes, as well as a decrease in the epithelial area of seminiferous tubules. However, there are no studies that analyze the alterations caused by stress in testicular cells. Thus, in this study, alterations in the morphology of testicular germ cells caused by different days of chronic stress were assessed. Adult male rats were exposed to stress by immersion in cold water (ICW) daily for 3, 8, 20 or 50 consecutive days...
February 21, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28224697/antioxidant-treatment-ameliorates-diabetes-induced-dysfunction-of-the-vas-deferens-in-a-rat-model
#17
P Tsounapi, M Honda, F Dimitriadis, S Shimizu, T Shiomi, K Hikita, M Saito, S Tomita, N Sofikitis, A Takenaka
Diabetes mellitus (DM) affects the male ejaculatory function. This study was designed to evaluate the role of oxidative stress in the development of diabetes-induced dysfunction of vas deferens (VD) in the rat. DM was induced by streptozotocin in 40 male Wistar rats. Subsequently, the diabetic animals were divided into three groups: DM group, DM + Eda group and DM + Tau group. These groups were administered saline, edaravone and taurine, respectively, daily for 4 weeks. Another group of ten rats served as a control group...
February 22, 2017: Andrologia
https://www.readbyqxmd.com/read/28217495/prevalence-of-hypogonadism-in-male-type-2-diabetes-mellitus-patients-with-and-without-coronary-artery-disease
#18
S V Madhu, M Aslam, A J Aiman, A Siddiqui, S Dwivedi
AIM: The present study is carried out to investigate hypogonadism using serum testosterone levels in male Type 2 diabetes mellitus (T2DM) subjects with and without coronary artery disease (CAD). SUBJECTS AND METHODS: A total of 150 age and body mass index-matched male subjects in the age group of 30-70 years were recruited in three groups; Group A - subjects with normal glucose tolerance, Group B - T2DM subjects without CAD, and Group C - T2DM subjects with CAD (n = 50 each group)...
January 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28215833/effects-of-platelet-rich-plasma-against-experimental-ischemia-reperfusion-injury-in-rat-testis
#19
C A Sekerci, Y Tanidir, T E Sener, G Sener, O Cevik, A Yarat, B Alev-Tuzuner, S Cetinel, E Kervancioglu, A Sahan, C Akbal
BACKGROUND: Testicular torsion is a common problem and, to date, there is no agent to preserve testicular function following detorsion. Platelet-rich plasma (PRP), with its rich growth factor composition, has proven beneficial in regenerative therapy. It is believed that PRP has not been studied in testis for ischemia/reperfusion (I/R) injury. OBJECTIVE: This study investigated the effect of PRP in an I/R rat model 1 month after detorsion. STUDY DESIGN: Of 24 adult male Sprague-Dawley rats, 18 were randomly assigned into three groups, with six in each: control, I/R and I/R + PRP...
January 23, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28214680/exploring-the-role-of-testosterone-in-the-cerebellum-link-to-neuroticism-from-adolescence-to-early-adulthood
#20
Dennis J L G Schutter, Rosa Meuwese, Marieke G N Bos, Eveline A Crone, Jiska S Peper
Previous research has found an association between a smaller cerebellar volume and higher levels of neuroticism. The steroid hormone testosterone reduces stress responses and the susceptibility to negative mood. Together with in vitro studies showing a positive effect of testosterone on cerebellar gray matter volumes, we set out to explore the role of testosterone in the relation between cerebellar gray matter and neuroticism. Structural magnetic resonance imaging scans were acquired, and indices of neurotic personality traits were assessed by administering the depression and anxiety scale of the revised NEO personality inventory and Gray's behavioural avoidance in one hundred and forty-nine healthy volunteers between 12 and 27 years of age...
January 29, 2017: Psychoneuroendocrinology
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