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https://www.readbyqxmd.com/read/29136143/time-varying-cycle-average-and-daily-variation-in-ambient-air-pollution-and-fecundability
#1
Carrie J Nobles, Enrique F Schisterman, Sandie Ha, Germaine M Buck Louis, Seth Sherman, Pauline Mendola
STUDY QUESTION: Does ambient air pollution affect fecundability? SUMMARY ANSWER: While cycle-average air pollution exposure was not associated with fecundability, we observed some associations for acute exposure around ovulation and implantation with fecundability. WHAT IS KNOWN ALREADY: Ambient air pollution exposure has been associated with adverse pregnancy outcomes and decrements in semen quality. STUDY DESIGN, SIZE, DURATION: The LIFE study (2005-2009), a prospective time-to-pregnancy study, enrolled 501 couples who were followed for up to one year of attempting pregnancy...
November 10, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29133596/exposure-to-ambient-fine-particulate-matter-and-semen-quality-in-taiwan
#2
Xiang Qian Lao, Zilong Zhang, Alexis Kh Lau, Ta-Chien Chan, Yuan Chieh Chuang, Jimmy Chan, Changqing Lin, Cui Guo, Wun Kai Jiang, Tony Tam, Gerard Hoek, Haidong Kan, Eng-Kiong Yeoh, Ly-Yun Chang
OBJECTIVES: Environmental exposure to chemicals has been considered a potential factor contributing to deteriorated semen quality. However, previous literature on exposure to air pollution and semen quality is inconsistent. We therefore investigated the health effects of short-term and long-term exposure to fine particulate matter (PM2.5) on semen quality in Taiwanese men from the general population. METHODS: A cross-sectional study was conducted among 6475 male participants aged 15-49 years who participated in a standard medical examination programme in Taiwan between 2001 and 2014...
November 13, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29131658/measuring-male-to-male-differences-in-fertility-or-effects-of-semen-treatments
#3
Rupert P Amann, Richard G Saacke, Guy F Barbato, Dagmar Waberski
Fertility is a convenient but meaningless term unless the outcome measure is stipulated and accounts for dependence of male fertility on the female population. We describe outcome measures and detail the impacts of the physiological status of each female and her external environment, as well as management imposed by humans. We explain the dominant role of the female reproductive tract as a series of hurdles for sperm seeking an ovum. Each spermatozoon in an ejaculate is unique, although usually most are morphologically similar...
November 13, 2017: Annual Review of Animal Biosciences
https://www.readbyqxmd.com/read/29129515/amygdalin-improves-microcirculatory-disturbance-and-attenuates-pancreatic-fibrosis-by-regulating-the-expression-of-endothelin-1-and-calcitonin-gene-related-peptide-in-rats
#4
Xiangqun Zhang, Jiangong Hu, Yuzhen Zhuo, Lihua Cui, Caixia Li, Naiqiang Cui, Shukun Zhang
BACKGROUND: The pathogenesis of chronic pancreatitis (CP) is a complex process of interaction between tissue injury and repair, which involves microcirculatory disturbance. Amygdalin, an effective component extracted from Semen Persicae (a kind of Chinese herbal medicine), can decrease blood viscosity and improve microcirculation. In this study, we investigated the therapeutic effects of amygdalin on pancreatic fibrosis in rats with CP. METHODS: The rat CP model was induced by injecting dibutyltin dichloride (DBTC) into the right caudal vein...
November 9, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29129306/studies-of-the-cryopreservation-condition-of-gymnocypris-przewalskii-spermatozoa
#5
Fulei Wei, Luxian Yu, Ruihong Li, Xia Zhang, Xuehan Zhang, Ya Zhang, Yuqing Wang, Hongchao Wang, Jian Liang, Rui Ma, Hongfang Qi, Qiwei Qin, Rongqing Zhang, Shihai Zhu, Changzhong Li
The endemic naked carp (Gymnocypris przewalskii Kessler, 1876) plays an important role in the maintenance of the distinctive ecological system of Lake Qinghai at 3.2km altitude on the Qinghai-Tibet Plateau in China. This study aimed to develop a cryopreservation protocol for Gymnocypris przewalskii spermatozoa. Semen was collected from mature individuals during migration and frozen using the liquid nitrogen vapor method. The influence of different cryoprotectants and three extenders on the post-thaw quality of the sperm was analyzed...
November 7, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29128699/feasibility-of-semen-collection-in-red-winged-tinamou-rhynchotus-rufescens-by-manual-stimulation-and-sazonality-implications
#6
Cristiane Sella Paranzini, Luiz Eduardo Cruz Dos Santos Correia, Laiza Sartori de Camargo, Kelry Mayara Silva, Tatyana Mendes de França, Josineudson Augusto de Vasconcelos Silva, Nabor Veiga, Fabiana Ferreira de Souza
This study aimed to report in detail, the technique and challenges of cloacal massage, to collect and evaluate semen from red-winged tinamou (Rhynchotus rufescens) keep in captivity, performed by only one technician. Sixty-four semen collection attempts, from 16 adult males, during breeding season and 16 attempts form these same 16 males in non-breeding season, were performed. Prior to collection, all animals were conditioned to cloacal massage for 6 weeks and the ejaculates were succeed with viable spermatozoa and then, evaluated for feces, urine and mucus contamination, volume, concentration, sperm vigor, motility, morphological defects and acrosome integrity...
October 28, 2017: Theriogenology
https://www.readbyqxmd.com/read/29128698/seminal-plasma-antioxidants-are-directly-involved-in-boar-sperm-cryotolerance
#7
Junwei Li, Isabel Barranco, Asta Tvarijonaviciute, Manuel F Molina, Emilio A Martinez, Heriberto Rodriguez-Martinez, Inmaculada Parrilla, Jordi Roca
Boar ejaculates are ejected in fractions with a specific composition in terms of sperm numbers and seminal plasma (SP), which is reflected in the varying sperm cryotolerance observed among different fractions. As boar sperm are particularly sensitive to oxidative stress, this study evaluated the role of SP antioxidants in the observed differences in sperm cryotolerance among ejaculate fractions. Ten ejaculates from five boars were manually collected in fractions: the first 10 mL of the sperm-rich fraction (SRF), the rest of the SRF and the post-SRF...
October 31, 2017: Theriogenology
https://www.readbyqxmd.com/read/29128697/comparison-of-pregnancy-outcomes-using-either-an-ovsynch-or-a-cosynch-protocol-for-the-first-timed-ai-with-liquid-or-frozen-semen-in-lactating-dairy-cows
#8
S Borchardt, L Schüller, L Wolf, C Wesenauer, W Heuwieser
The objective of this study was to evaluate fertility to the first timed AI (TAI) using either liquid semen or frozen semen after an Ovsynch or a Cosynch protocol in lactating dairy cows. The hypothesis was that there is an increase in fertility to the first TAI when cows are inseminated with liquid semen compared to that when frozen semen is used in a Cosynch protocol. Lactating dairy cows (n = 1724; 540 primiparous, 1184 multiparous) from 9 commercial dairy farms were enrolled on a weekly basis to facilitate first timed AI...
November 9, 2017: Theriogenology
https://www.readbyqxmd.com/read/29128366/vaccarin-protects-human-microvascular-endothelial-cells-from-apoptosis-via-attenuation-of-hdac1-and-oxidative-stress
#9
Xuexue Zhu, Yueyue Lei, Fanggen Tan, Leilei Gong, Haifeng Gong, Wei Yang, Ting Chen, Zhixuan Zhang, Weiwei Cai, Bao Hou, Xu Wang, Haijian Sun, Yuetao Zhou, Liying Qiu
Vaccarin (VAC), an active flavonoid glycoside from vaccariae semen, exhibits extensive biological activities including vascular endothelial cell protective effects. Histone deacetylase1 (HDAC1) is an epigenetic regulator in cellular apoptosis. In this study, we evaluated the protective effects of VAC on high glucose (HG)-induced cell apoptosis in human microvascular endothelial cells (HMEC-1). The levels of reactive oxygen species, activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) were measured...
November 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29128269/post-orgasmic-illness-syndrome-a-review
#10
REVIEW
Hoang Minh Tue Nguyen, Areeg Bala, Andrew T Gabrielson, Wayne J G Hellstrom
INTRODUCTION: Post-orgasmic illness syndrome (POIS) is a rare but debilitating cluster of postejaculatory symptoms affecting men. It is a chronic disorder manifesting as a constellation of flulike and allergic symptoms within seconds, minutes, or hours after ejaculation. POIS can be followed by mental sequelae such as diminished concentration and irritability. POIS negatively affects the life of patients by limiting sexual encounters, dampening romantic prospects, creating internal struggles to avoid eroticism, and affecting patients' schedules...
November 8, 2017: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/29127940/deciphering-the-chemical-origin-of-the-semen-like-floral-scents-in-three-angiosperm-plants
#11
Xiaoping Zhang, Konstantin Chingin, Dacai Zhong, Liping Luo, Vladimir Frankevich, Huanwen Chen
The chemical origin and biological role of distinct semen-like odor occasionally found in some flowers are very curious but remain scarcely studied. Here, we used direct ambient corona discharge ionization mass spectrometry (MS) to study the volatile chemical composition behind the semen-like odor emitted by the fresh flowers of Photinia serrulata, Castanopsis sclerophylla and Stemona japonica without any chemical pretreatment. Chemical identification was performed using high-resolution MS analysis in combination with tandem MS analysis and whenever possible was confirmed by the analysis of standard reference compounds...
November 8, 2017: Phytochemistry
https://www.readbyqxmd.com/read/29126865/vitrification-of-dog-spermatozoa-effects-of-two-cryoprotectants-sucrose-or-trehalose-and-two-warming-procedures
#12
E Caturla-Sánchez, M J Sánchez-Calabuig, J F Pérez-Gutiérrez, J Cerdeira, C Castaño, J Santiago-Moreno
Sperm vitrification is a low cost and simple technique that does not require special equipment and may represent an attractive alternative to the costly and time consuming conventional dog spermatozoa cryopreservation techniques. The objective of this study was to evaluate different cryoprotectants and warming temperatures on the vitrification of dog spermatozoa. Pooled semen samples from 10 beagle dogs were vitrified with four extenders, based on Tris, citric acid and glucose, 20% egg yolk (TCG-20% EY) and different combinations of sucrose and/or trehalose: 250 mM sucrose; 250 mM trehalose; 125 mM sucrose + 125 mM trehalose; 250 mM sucrose + 250 mM trehalose...
November 7, 2017: Cryobiology
https://www.readbyqxmd.com/read/29126319/effects-of-vitamin-d-supplementation-on-semen-quality-reproductive-hormones-and-live-birth-rate-a-randomized-clinical-trial
#13
Martin Blomberg Jensen, Jacob Gerner Lawaetz, Jørgen Holm Petersen, Anders Juul, Niels Jørgensen
Context: Animal models and cross-sectional cohort studies have suggested a beneficial role for vitamin D in male reproduction. Objective: Determine the effect of vitamin D and calcium supplementation on semen quality in infertile men with serum 25-hydroxyvitamin-D (25OHD)≤ 50 nmol/l. Design: A single centre, triple-blinded, randomized clinical trial. Participants: 1427 infertile men were screened to include 330. 1002 men did not meet inclusion criteria and 95 did not wish to participate...
November 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29125963/a-capillary-electrophoresis-method-for-identifying-forensically-relevant-body-fluids-using-mirnas
#14
Carrie Mayes, Sarah Seashols-Williams, Sheree Hughes-Stamm
Body fluid identification (BFID) can provide crucial information during the course of an investigation. In recent years, microRNAs (miRNAs) have shown considerable body fluid specificity, are able to be co-extracted with DNA, and their small size (18-25 nucleotides) make them ideal for analyzing highly degraded forensic samples. In this study, we designed a preliminary 8-marker system for BFID including an endogenous reference gene (let-7g) to differentiate between venous blood (miR-451a and miR-142-3p), menstrual blood (miR-141-3p and miR-412-3p), semen (miR-891a and miR-10b), and saliva (miR-205) using a capillary electrophoresis approach...
October 31, 2017: Legal Medicine
https://www.readbyqxmd.com/read/29124782/the-effect-of-cigarette-smoking-on-human-seminal-parameters-sperm-chromatin-structure-and-condensation
#15
R M Mostafa, Y S Nasrallah, M M Hassan, A F Farrag, A Majzoub, A Agarwal
Considerable debate still exists regarding the effects of cigarette smoking on male fertility. This work aimed to explore effects of cigarette smoking on semen parameters and DNA fragmentation on 95 infertile patients who were divided into infertile male nonsmokers (45) and infertile male smokers (50). Smokers were subdivided according to a number of cigarettes smoked per day into mild (≤10), moderate (11-20) and heavy smokers (≥21). Semen analysis, sperm chromatin condensation integrity with aniline blue staining and sperm viability were compared between the study groups...
November 9, 2017: Andrologia
https://www.readbyqxmd.com/read/29124647/improvement-of-semen-parameters-after-antibiotic-therapy-in-asymptomatic-infertile-men-infected-with-mycoplasma-genitalium
#16
Mohammad Hossein Ahmadi, Akbar Mirsalehian, Mohammad Ali Sadighi Gilani, Abbas Bahador, Malihe Talebi
OBJECTIVES: To elucidate the association between asymptomatic infections caused by Mycoplasma genitalium and male infertility, and evaluate the role of antibiotic therapy in treatment of this failure. METHODS: A total of 165 infertile males having abnormal semen parameters (study group) and 165 healthy fertile men (control group) were included. Semen samples were taken from all participants and after analyzing for semen parameters, undergone real-time PCR, microbial culture, and reactive oxygen species (ROS), as well as total antioxidant capacity (TAC) assays...
November 9, 2017: Infection
https://www.readbyqxmd.com/read/29124237/oxidation-reduction-potential-as-a-new-marker-for-oxidative-stress-correlation-to-male-infertility
#17
REVIEW
Ashok Agarwal, Albert Danh Bui
Male infertility affects men worldwide. Oxidative stress (OS), characterized by an overabundance of reactive oxygen species (ROS) or a deficiency of antioxidants, is one of the major causes of male infertility. OS causes damage at the molecular level, which impairs lipids, proteins, and DNA. The cyclic cascade of redox reactions weakens sperm function which leads to poor semen parameters and eventual sterility. There is a need for advanced diagnostic tests that can quickly and accurately detect OS. Most commonly used assays can only measure single constituents of OS...
November 2017: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/29121862/human-papillomavirus-in-semen-and-the-risk-for-male-infertility-a-systematic-review-and-meta-analysis
#18
Zhangyan Lyu, Xiaoshuang Feng, Ni Li, Wei Zhao, Luopei Wei, Yuheng Chen, Wenjing Yang, Hongxia Ma, Bing Yao, Kai Zhang, Zhibin Hu, Hongbing Shen, Dong Hang, Min Dai
BACKGROUND: Human papillomavirus (HPV) is one of the most prevalent sexually transmitted viruses. Despite the increasing evidence of HPV prevalence in semen, the worldwide distribution of HPV types in semen and risk for male infertility remain inconclusive. METHODS: Four electronic databases were searched for English language studies conducted between January 1990 and December 2016 that reported HPV DNA prevalence in semen. Based on the PRISMA guidelines, HPV prevalence was estimated among general population and fertility clinic attendees, respectively, and heterogeneity testing was performed using Cochran's Q and I (2) statistics...
November 9, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29120706/administration-of-cloprostenol-and-oxytocin-before-electroejaculation-in-goat-bucks-reduces-the-needed-amount-of-electrical-stimulation-without-affecting-seminal-quality
#19
Rodolfo Ungerfeld, Daniela Casuriaga, Julia Giriboni, Aline Freitas-de-Melo, Patricia Silveira, Felipe Zandonadi Brandão
Electroejaculation (EE) is a widely used semen collection technique; but, it is stressful and painful for the animals. Considering these concerns, it may be important to develop practices to decrease the negative implications of EE on animals. Oxytocin and prostaglandin-F2alpha (PGF2α) stimulate the contractions of the muscles of the male genital tract. Therefore, the aim of this study was to analyze the effectiveness of the administration of oxytocin and/or a PGF2α analogue (cloprostenol) to bucks in relation to their stress response and sperm parameters before semen collection by EE was performed...
October 28, 2017: Theriogenology
https://www.readbyqxmd.com/read/29119858/eimeria-taggarti-n-sp-a-novel-coccidian-apicomplexa-eimeriorina-in-the-prostate-of-an-antechinus-flavipes
#20
Jemima Amery-Gale, Joanne Maree Devlin, Liliana Tatarczuch, David Augustine Taggart, David J Schultz, Jenny A Charles, Ian Beveridge
A novel coccidian species was discovered in the prostate of an Antechinus flavipes (yellow-footed antechinus) in South Australia, during the period of post-mating male antechinus immunosuppression and mortality. This novel coccidian is unusual because it develops extra-intestinally and sporulates endogenously within the prostate gland of its mammalian host. Histological examination of prostatic tissue revealed dense aggregations of spherical and thin-walled tetrasporocystic, dizoic sporulated coccidian oocysts within tubular lumina, with unsporulated oocysts and gamogonic stages within the cytoplasm of glandular epithelial cells...
November 10, 2017: Journal of Parasitology
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