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https://www.readbyqxmd.com/read/29242704/effects-of-prolonged-treatment-with-co-trimoxazole-on-the-thyroid-gland-liver-and-epididymal-sperm-reserve-in-dogs
#1
Davinson C Anyogu, Vincent So Shoyinka, John I Ihedioha
Co-trimoxazole is an antimicrobial drug gotten from potentiation of sulfamethoxazole with trimethoprim. It is widely used for the treatment of bacterial and protozoan infections in humans. It is also used in veterinary clinics against susceptible microorganisms, but thyroid dysfunction has raised concern especially in dogs. This study aimed to determine the effects of prolonged treatment with co-trimoxazole in euthyroid dogs. Dogs were given co-trimoxazole at 30, 60, and 120 mg/kg body weight at 12-hour intervals for 21 days...
2017: Clinical Medicine Insights. Pathology
https://www.readbyqxmd.com/read/29241080/paternal-urinary-concentrations-of-organophosphate-flame-retardant-metabolites-fertility-measures-and-pregnancy-outcomes-among-couples-undergoing-in-vitro-fertilization
#2
Courtney C Carignan, Lidia Mínguez-Alarcón, Paige L Williams, John D Meeker, Heather M Stapleton, Craig M Butt, Thomas L Toth, Jennifer B Ford, Russ Hauser
BACKGROUND: Use of organophosphate flame retardants (PFRs) has increased over the past decade following the phase out of some brominated flame retardants, leading to increased human exposure. We recently reported that increasing maternal PFR exposure is associated with poorer pregnancy outcomes among women from a fertility clinic. Because a small epidemiologic study previously reported an inverse association between male PFR exposures and sperm motility, we sought to examine associations of paternal urinary concentrations of PFR metabolites and their partner's pregnancy outcomes...
December 11, 2017: Environment International
https://www.readbyqxmd.com/read/29233211/toxicity-of-marine-pollutants-on-the-ascidian-oocyte-physiology-an-electrophysiological-approach
#3
Alessandra Gallo
In marine animals with external fertilization, gametes are released into seawater where fertilization and embryo development occur. Consequently, pollutants introduced into the marine environment by human activities may affect gametes and embryos. These xenobiotics can alter cell physiology with consequent reduction of fertilization success. Here the adverse effects on the reproductive processes of the marine invertebrate Ciona intestinalis (ascidian) of different xenobiotics: lead, zinc, an organic tin compound and a phenylurea herbicide were evaluated...
December 13, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/29230439/ex-vivo-detection-and-quantification-of-gold-nanoparticles-in-human-seminal-and-follicular-fluids
#4
Dimitrios Bitounis, Jean-Philippe Klein, Lionel Mery, Amira El-Merhie, Valérie Forest, Delphine Boudard, Jérémie Pourchez, Michèle Cottier
Increasing consumption of engineered nanoparticles and occupational exposure to novel, ultrafine airborne particles during the last decades has coincided with deterioration of sperm parameters and delayed fecundity. In order to prevent possible adverse health effects and ensure a sustainable growth for the nanoparticle industry, the ability to investigate the nanosized, mineralogical load of human reproductive systems is becoming a real clinical need. Toward this goal, the current study proposes two methods for the detection and quantification of engineered nanoparticles in human follicular and seminal fluid, developed with the use of well-defined 60 nm Au particles...
December 12, 2017: Analyst
https://www.readbyqxmd.com/read/29228106/proteomics-analysis-of-good-and-poor-quality-human-sperm-demonstrates-several-proteins-are-routinely-aberrantly-regulated
#5
J K Netherton, L Hetherington, R A Ogle, T Velkov, M A Baker
Male infertility is a complex condition, and for the most part, all men produce defective spermatozoa, but infertile men have a tendency to produce more. Despite attempts to classify infertility, there is no definitive test. One approach would be to use protein biomarkers, however as yet, we still do not understand proteins that are differentially expressed within defective spermatozoa. As such, we took nine men (fertility status unknown) and used Percoll density gradients to isolate a population of good and poor quality sperm...
December 7, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29222649/effect-of-oral-zinc-supplementation-on-the-thiol-oxido-reductive-index-and-thiol-related-enzymes-in-seminal-plasma-and-spermatozoa-of-iraqi-asthenospermic-patients
#6
Abdul Razzaq S Alsalman, Lamia A Almashhedy, Mahmoud Hussein Hadwan
A thiol group plays an essential role in sperm metabolism and the antioxidative defense state. Zinc is the second most abundant element in the human body, following iron. The present study was conducted to study the effect of zinc supplementation on the characteristics of semen along with thiol and thiol-related enzymes in semen of asthenospermic patients. Semen samples were obtained from 60 fertile and 60 asthenospermic men, from couples who had consulted the infertility clinic of Babil Hospital (Hillah city, Iraq)...
December 8, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29216539/influence-of-extracellular-environment-on-the-motility-and-structural-properties-of-spermatozoa-collected-from-hormonally-stimulated-panamanian-golden-frog-atelopus-zeteki
#7
Gina Della Togna, Brian Gratwicke, Matthew Evans, Lauren Augustine, Han Chia, Ed Bronikowski, James B Murphy, Pierre Comizzoli
A better understanding of the factors influencing the biology of amphibian spermatozoa after release from the testis is a prerequisite to the development of sperm preservation methods. The objective of the study was to determine the effect of extracellular conditions (exposure to water and different temperatures) over time on the sperm motility and structural properties (including morphology and DNA integrity) collected from hormonally stimulated Atelopus zeteki. Following intraperitoneal injection of gonadotropin-releasing hormone agonist (des-Gly10, D-Ala6, Pro-NHEt9 GnRH; 4 μg/g of body weight), human chorionic gonadotropin (hCG, 10 IU/gbw), or Amphiplex™ (0...
November 29, 2017: Theriogenology
https://www.readbyqxmd.com/read/29215767/exposure-to-levonorgestrel-increases-nest-acquisition-success-and-decreases-sperm-motility-in-the-male-fathead-minnow-pimephales-promelas
#8
Tyler Frankel, Lance Yonkos, Franklin Ampy, Jack Frankel
Progestins are utilized as a component of human contraceptives, and enter the environment via wastewater treatment plant effluent. Certain progestins activate fish androgen receptors and cause decreases in fecundity and masculinization of females. In this study, a nest acquisition assay and computer assisted sperm analysis (CASA) was used to examine the effects of levonorgestrel (LNG) on male fathead minnow (Pimephales promelas) reproductive fitness. Males were exposed to 0, 10, or 100ng/L LNG for 14d. Combinations of a control male and a male from one of the treatments were placed into a competitive nesting assay, and time each male spent holding the nest and time spent exhibiting aggressive behaviors were analyzed at 48hrs post-exposure...
December 7, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29214481/environmental-levels-of-triclosan-and-male-fertility
#9
Joanna Jurewicz, Michał Radwan, Bartosz Wielgomas, Paweł Kałużny, Anna Klimowska, Paweł Radwan, Wojciech Hanke
Triclosan is a synthetic chemical with broad antimicrobial activity that has been used extensively in consumer products, including personal care products, textiles, and plastic kitchenware, although the exposure which is widespread evidence from human studies is scarce. Our study aims to investigate the relationship between triclosan exposure and male fertility. Triclosan (TCS) urinary concentrations were measured using gas chromatography coupled with tandem mass spectrometry in 315 men recruited from a male reproductive health clinic with normal sperm concentration (≥ 15 mln/ml) (WHO 2010) under 45 years of age...
December 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29210252/property-control-and-separated-human-biomaterials
#10
Neil Maddox
This article examines the relationship between the existence of control rights and property in separated human biomaterials. Much of the theory as to what constitutes property is examined and it is contended that Article 22 of the Convention on Human Rights and Biomedicine does not presuppose property in such materials. An analysis is undertaken of the case-law relating to control and property in sperm and embryos from the UK, Australia and the US and the shortcomings of utilising the property paradigm in these disputes are highlighted...
March 2017: European Journal of Health Law
https://www.readbyqxmd.com/read/29208927/establishment-of-a-strain-of-haemophilia-a-pigs-by-xenografting-of-foetal-testicular-tissue-from-neonatally-moribund-cloned-pigs
#11
Hiroyuki Kaneko, Kazuhiro Kikuchi, Michiko Nakai, Daiichiro Fuchimoto, Shunichi Suzuki, Shoichiro Sembon, Junko Noguchi, Akira Onishi
Grafting of testicular tissue into immunodeficient mice makes it possible to obtain functional sperm from immature donor animals that cannot be used for reproduction. We have developed a porcine model of human haemophilia A (haemophilia-A pigs) by nuclear transfer cloning from foetal fibroblasts after disruption of the X-linked coagulation factor VIII (F8) gene. Despite having a recessive condition, female F8+/- cloned pigs died of severe bleeding at an early age, as was the case for male F8-/Y cloned pigs, thus making it impossible to obtain progeny...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29208065/use-of-confocal-microscopy-to-evaluate-equine-zygote-development-after-sperm-injection-of-oocytes-matured-in-vivo-or-in-vitro
#12
Elena Ruggeri, Keith F DeLuca, Cesare Galli, Giovanna Lazzari, Jennifer G DeLuca, Joanne E Stokes, Elaine M Carnevale
Confocal microscopy was used to image stages of equine zygote development, at timed intervals, after intracytoplasmic sperm injection (ICSI) of oocytes that were matured in vivo or in vitro. After fixation for 4, 6, 8, 12, or 16 h after ICSI, zygotes were incubated with α/β tubulin antibodies and human anticentromere antibody (CREST/ACA), washed, incubated in secondary antibodies, conjugated to either Alexa 488 or Alexa 647, and incubated with 561-Phalloidin and Hoechst 33258. An Olympus IX81 spinning disk confocal microscope was used for imaging...
December 6, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/29207656/ccr6-is-required-for-ligand-induced-catsper-activation-in-human-sperm
#13
Ruiying Diao, Tao Wang, Kin Lam Fok, Xiaofeng Li, Yechun Ruan, Mei Kuen Yu, Yimin Cheng, Ying Chen, Hao Chen, Lisha Mou, Xueyong Cai, Yan Wang, Zhiming Cai, Xuhui Zeng, Hsiao Chang Chan
CatSper channel has been considered the principal sperm Ca2+ channel responsible for the cytosolic Ca2+ elevation required for various sperm functions necessary for fertilization [1-4]. However, the mechanism underlying the activation of CatSper channel by various physiological ligands remain incompletely understood. We have recently demonstrated the expression of C-C chemokine receptor 6 (CCR6) in sperm and Ca2+ influx upon binding of human β-defensin 1 (DEFB1) to CCR6, which is important for sperm motility [5]...
October 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/29203468/edc-impact-reduced-sperm-counts-in-rats-exposed-to-human-relevant-mixtures-of-endocrine-disrupters
#14
Marta Axelstad, Ulla Hass, Martin Scholze, Sofie Christiansen, Andreas Kortenkamp, Julie Boberg
Human semen quality is declining in many parts of the world, but the causes are ill-defined. In rodents, impaired sperm production can be seen with early life exposure to certain endocrine disrupting chemicals, but the effects of combined exposures are not properly investigated. In this study, we examined the effects of early exposure to the painkiller paracetamol and mixtures of human relevant endocrine disrupting chemicals in rats. One mixture contained four estrogenic compounds, another contained eight anti-androgenic environmental chemicals, and a third mixture contained estrogens, anti-androgens and paracetamol...
December 4, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29199464/sperm-rna-elements-as-markers-of-health
#15
Rayanne B Burl, Stephanie Clough, Edward Sendler, Molly Estill, Stephen A Krawetz
Idiopathic infertility, an etiology not identified as part of standard clinical assessment, represents approximately 20% of all infertility cases. Current male infertility diagnosis focuses on the concentration, motility, and morphology of spermatozoa. This is of limited value when predicting birth success and of limited utility when selecting the optimum treatment. At fertilization, spermatozoa provide their genomic contribution, as well as a set of RNAs and proteins that have distinct roles in development...
December 3, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29198956/effects-of-staining-method-and-clinician-experience-on-the-evaluation-of-stallion-sperm-morphology
#16
Ruby Yoana Murcia-Robayo, Eleonore Jouanisson, Guy Beauchamp, Mouhamadou Diaw
Evaluation of sperm morphology is part of the assessment of fertility in human and animal reproduction. Analyses can be performed using different techniques, including the use of staining methods In our prospective study, the morphology of equine sperm was evaluated using 3 staining methods Diff-Quik, eosin-nigrosin, and SpermBlue, the latter being a relatively new stain commonly used for human sperm. Our hypotheses were that (1) SpermBlue allows easier assessment of horse sperm morphology and facilitates better identification of sperm abnormalities, and (2) sperm morphology classification differs depending on the evaluator's experience...
November 29, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29198470/parental-advisory-maternal-and-paternal-stress-can-impact-offspring-neurodevelopment
#17
REVIEW
Jennifer C Chan, Bridget M Nugent, Tracy L Bale
Parental stress exposures are implicated in the risk for offspring neurodevelopmental and neuropsychiatric disorders, prompting critical examination of preconception and prenatal periods as vulnerable to environmental insults such as stress. Evidence from human studies and animal models demonstrates the influence that both maternal and paternal stress exposures have in changing the course of offspring brain development. Mechanistic examination of modes of intergenerational transmission of exposure during pregnancy has pointed to alterations in placental signaling, including changes in inflammatory, nutrient-sensing, and epigenetic pathways...
October 13, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29197623/dual-effects-of-sulfasalazine-on-rat-sperm-characteristics-spermatogenesis-and-steroidogenesis-in-two-experimental-models
#18
Mohammad Mehdi Ommati, Reza Heidari, Akram Jamshidzadeh, Mohammad Javad Zamiri, Zilong Sun, Samira Sabouri, Jundong Wang, Fatemeh Ahmadi, Nafiseh Javanmard, Kazem Seifi, Saeed Mousapour, Babak Shirazi Yeganeh
There are reports of sulfasalazine (Salazosulfapyridine; SASP)-induced reproductive toxicity, but there it is not known whether the SASP molecule or its intestinal metabolites are responsible for this effect. Rats received SASP (150, 300, and 600mg/kg) for 60 consecutive days (in vivo). Additionally, epididymal sperm was isolated and incubated with SASP (10μM-1600μM) (in vitro). Markers of oxidative stress, mitochondrial function, and sperm functionality, along with testis histopathology as well as several steroidogenic genes and proteins, including steroidogenic acute regulatory (StAR) protein, cytochrome P450 side chain cleavage enzyme (P450scc; Cyp11a), 3β-hydroxysteroid dehydrogenase (3β-HSD), 17β-hydroxysteroid dehydrogenase (17β-HSD) were measured...
November 29, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29196809/melatonin-affects-membrane-integrity-intracellular-reactive-oxygen-species-caspase3-activity-and-akt-phosphorylation-in-frozen-thawed-human-sperm
#19
Atefeh Najafi, Emmanuel Adutwum, Abazar Yari, Ensieh Salehi, Saideh Mikaeili, Fariba Dashtestani, Farid Abolhassani, Leila Rashki, Setareh Shiasi, Ebrahim Asadi
Cryopreservation is known to induce oxidative stress in spermatozoa. Although melatonin has powerful antioxidant properties, little is known about its effects on human sperm quality during cryopreservation. The present study was undertaken to investigate the effects of melatonin treatment on human sperm parameters essential for fertilization. We first evaluated the effects of various concentrations of melatonin (0-15 mM) on human sperm parameters such as motility, viability and levels of intracellular reactive oxygen species during cryopreservation in order to identify an optimal dose with the greatest effects for further studies...
December 1, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29196300/mettl3-mutation-disrupts-gamete-maturation-and-reduces-fertility-in-zebrafish
#20
Hui Xia, Chengrong Zhong, Xingxing Wu, Ji Chen, Binbin Tao, Xiaoqin Xia, Mijuan Shi, Zuoyan Zhu, Vance L Trudeau, Wei Hu
N6-methyladenosine (m6A), catalyzed by Mettl3 methyltransferase, is a highly conserved epigenetic modification in eukaryotic mRNA. Previous studies have implicated m6A modification in multiple biological processes, but the in vivo function of m6A has been difficult to study, because mettl3 mutants are embryonic lethal in both mammals and plants. In this study, we have used transcription activator-like effector nucleases and generated viable zygotic mettl3 mutant, Zmettl3m/m , in zebrafish. We find that the oocytes in Zmettl3m/m adult females are stalled in early development and the ratio of full grown stage (FG) follicles is significantly lower than that of wild type...
December 1, 2017: Genetics
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