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https://www.readbyqxmd.com/read/28646801/the-effects-of-exposure-to-low-frequency-electromagnetic-fields-on-male-fertility
#1
Mahsa Darbandi, Sara Darbandi, Ashok Agarwal, Ralf Henkle, Mohammad Reza Sadeghi
Context • People are increasingly exposed to low frequency (LF) electromagnetic fields (EMFs), mainly from electricity distribution networks and electronic devices. Critics of this widespread exposure believe that it can have detrimental effects on the human body. On the other hand, many in vivo and in vitro studies have claimed that low frequency electromagnetic therapy can function as a form of alternative medicine and that therapists can treat disease by applying electromagnetic radiation or pulsed EMFs to the body or cells...
June 23, 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28646798/social-context-matters-ethnicity-discrimination-and-stress-reactivity
#2
David Busse, Ilona S Yim, Belinda Campos
Exposure to chronic discrimination is associated with increased morbidity and mortality. The study of biobehavioral pathways linking discrimination with health outcomes has mostly focused on the cardiovascular system, with fewer studies addressing the hypothalamus-pituitary-adrenal (HPA) axis. In this study we tested associations between Latino ethnicity, experiences of discrimination, and cortisol responses to an acute laboratory stressor. One hundred fifty eight individuals (92 female, 66 male) between the ages of 18 and 29 years participated in the study...
May 31, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28646780/sem-eds-and-optical-microscopy-analyses-of-microplastics-in-ocean-trawl-and-fish-guts
#3
Zhong-Min Wang, Jeff Wagner, Sutapa Ghosal, Gagandeep Bedi, Stephen Wall
Microplastic particles from Atlantic and Pacific Ocean trawls, lab-fed fish guts and ocean fish guts have been characterized using optical microscopy and SEM/EDS in terms of size, morphology, and chemistry. We assessed whether these measurements could serve as a rapid screening process for subsequent identification of the likely microplastic candidates by micro-spectroscopy. Optical microscopy enabled morphological classification of the types of particles or fibers present in the sample, as well as the quantification of particle size ranges and fiber lengths...
June 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28646769/health-benefit-from-decreasing-exposure-to-heavy-metals-and-metalloid-after-strict-pollution-control-measures-near-a-typical-river-basin-area-in-china
#4
Suzhen Cao, Xiaoli Duan, Yingqun Ma, Xiuge Zhao, Yanwen Qin, Yan Liu, Sai Li, Binghui Zheng, Fusheng Wei
The metal(loid) pollution still is a great concern due to the effects from urbanization and industrialization. While, the health risks from the toxic metal(loid)s could decrease if strict pollution control measures were adopted. However, few studies to date investigate the health risks of heavy metal(loid)s in a systematic river basin for the dependent residents, after taking pollution control measures. Thus, the contents of metal(loid)s (Cu, Pb, Zn, Cd, Mn, As) in surface water along a typical river basin were investigated in this study, and the potential non-carcinogenic and carcinogenic health risks posed to the residents were assessed...
June 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28646768/source-profiling-of-arsenic-and-heavy-metals-in-the-selangor-river-basin-and-their-maternal-and-cord-blood-levels-in-selangor-state-malaysia
#5
Nobumitsu Sakai, Zohour Alsaad, Nguyen Thi Thuong, Kenji Shiota, Minoru Yoneda, Mustafa Ali Mohd
Arsenic and 5 heavy metals (nickel, copper, zinc, cadmium and lead) were quantitated in surface water (n = 18) and soil/ore samples (n = 45) collected from 5 land uses (oil palm converted from forest, oil palm in peat swamp, bare land, quarry and forest) in the Selangor River basin by inductively coupled plasma mass spectrometry (ICP-MS). Geographic information system (GIS) was used as a spatial analytical tool to classify 4 land uses (forest, agriculture/peat, urban and bare land) from a satellite image taken by Landsat 8...
June 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28646736/cell-damage-caused-by-ultraviolet-b-radiation-in-the-desert-cyanobacterium-phormidium-tenue-and-its-recovery-process
#6
Gaohong Wang, Songqiang Deng, Jiafeng Liu, Chaoran Ye, Xiangjun Zhou, Lanzhou Chen
Phormidium tenue, a cyanobacterium that grows in the topsoil of biological soil crusts (BSCs), has the highest recovery rate among desert crust cyanobacteria after exposure to ultraviolet B (UV-B) radiation. However, the mechanism underlying its recovery process is unclear. To address this issue, we measured chlorophyll a fluorescence, generation of reactive oxygen species (ROS), lipid peroxidation, and repair of DNA breakage in P. tenue following exposure to UV-B. We found that UV-B radiation at all doses tested reduced photosynthesis and induced cell damage in P...
June 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28646724/zinc-and-calcium-alter-the-relationship-between-mitochondrial-respiration-ros-and-membrane-potential-in-rainbow-trout-oncorhynchus-mykiss-liver-mitochondria
#7
Mahmoud S Sharaf, Don Stevens, Collins Kamunde
At excess levels, zinc (Zn) disrupts mitochondrial functional integrity and induces oxidative stress in aquatic organisms. Although much is known about the modulation of Zn toxicity by calcium (Ca) in fish, their interactions at the mitochondrial level have scarcely been investigated. Here we assessed the individual and combined effects of Zn and Ca on the relationship between mitochondrial respiration, ROS and membrane potential (ΔΨmt) in rainbow trout liver mitochondria. We tested if cation uptake through the mitochondrial calcium uniporter (MCU) is a prerequisite for Zn- and/or Ca-induced alteration of mitochondrial function...
June 12, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28646709/association-between-father-involvement-and-attitudes-in-early-child-rearing-and-depressive-symptoms-in-the-pre-adolescent-period-in-a-uk-birth-cohort
#8
Charles Opondo, Maggie Redshaw, Maria A Quigley
BACKGROUND: Much of the research on parenting and its influence on child development has emphasised the mother's role. However, increasing evidence highlights the important role of fathers in the development, health and well-being of their children. We sought to explore the association between paternal involvement in early child-rearing and depressive symptoms in 9 and 11 year-old children. METHODS: We used data from the Avon Longitudinal Study of Parents and Children (ALSPAC) cohort recruited in the southwest of England...
June 15, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28646699/insulin-and-the-polycystic-ovary-syndrome
#9
REVIEW
Djuro Macut, Jelica Bjekić-Macut, Dario Rahelić, Mirjana Doknić
Polycystic ovary syndrome (PCOS) is the most prevalent endocrinopathy among women during reproductive age. PCOS is characterised by hyperandrogenaemia, hyperinsulinaemia, and deranged adipokines secretion from the adipose tissue. In addition to the reduced insulin sensitivity, PCOS women exhibit β-cell dysfunction as well. Low birth weight and foetal exposure to androgens may contribute to the development of the PCOS phenotype during life. Further metabolic complications lead to dyslipidaemia, worsening obesity and glucose tolerance, high prevalence of metabolic syndrome, and greater susceptibility to diabetes...
June 12, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28646689/association-between-maternal-urinary-chromium-and-premature-rupture-of-membranes-in-the-healthy-baby-cohort-study-in-china
#10
Sha Huang, Wei Xia, Yuanyuan Li, Bin Zhang, Aifen Zhou, Tongzhang Zheng, Zhengmin Qian, Zheng Huang, Shi Lu, Zhong Chen, Youjie Wang, Xinyun Pan, Wenqian Huo, Shuna Jin, Yangqian Jiang, Shunqing Xu
Chromium exposure from increasing industrial releases has become a threat for pregnant women due to the potential health effects on vulnerable embryos. Previous studies have suggested that maternal chromium exposure is associated with adverse birth outcomes, but no epidemiological research has been conducted to examine the relationship between chromium exposure and premature rupture of membranes (PROM). This study aimed at investigating the association of maternal urinary chromium exposure levels with PROM and was performed with 5408 pregnant women recruited from 2012 to 2014 in the city of Wuhan, China...
June 21, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28646679/hypoxia-induced-adam-17-expression-is-mediated-by-rsk1-dependent-c-ebp%C3%AE-activation-in-human-lung-fibroblasts
#11
Jing-Yun Chen, Chien-Huang Lin, Bing-Chang Chen
Hypoxia was identified as a mediator of lung fibrosis in patients with chronic obstructive asthma (COA). Overexpression of a disintegrin and metalloproteinase 17 (ADAM 17) and connective tissue growth factor (CTGF) leads to development of tissue fibrosis. However, the signaling pathway in hypoxia-induced ADAM 17 expression remains poorly defined. In this study, we investigated the roles that ribosomal S-6 kinase 1 (RSK1)/CCAAT/enhancer-binding protein β (C/EBPβ)-dependent ADAM 17 expression plays in hypoxia-induced CTGF expression in human lung fibroblasts...
June 21, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28646666/detection-of-mycobacterium-avium-subspecies-paratuberculosis-in-powdered-infant-formula-using-is900-quantitative-pcr-and-liquid-culture-media
#12
Kamal R Acharya, Navneet K Dhand, Richard J Whittington, Karren M Plain
Mycobacterium avium subspecies paratuberculosis (MAP) has been implicated in Crohn's disease in humans resulting in public concern over the presence of MAP in powdered infant formula, which could contribute towards early human exposure to MAP or MAP components. Testing of representative powdered infant formula samples using effective tests is required to provide information on contamination of infant formula with MAP, so that consumers can make informed decisions. This study aimed to test representative powdered infant formula samples for the presence of MAP using a quantitative PCR and liquid culture method...
June 8, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28646545/disruptions-in-emotion-regulation-as-a-mechanism-linking-community-violence-exposure-to-adolescent-internalizing-problems
#13
Charlotte Heleniak, Kevin M King, Katie A McLaughlin, Kathryn C Monahan
Although community violence is an established risk factor for youth aggression, less research has examined its relation with internalizing psychopathology. This study examined associations of community violence exposure with internalizing symptoms, and state and trait emotion dysregulation as mechanisms underlying these associations, in 287 adolescents aged 16-17 (45.6% male; 40.8% White). Community violence exposure was associated with internalizing symptoms, negative affect during peer evaluation, trait emotional reactivity, and infrequent problem solving...
June 23, 2017: Journal of Research on Adolescence: the Official Journal of the Society for Research on Adolescence
https://www.readbyqxmd.com/read/28646540/animal-embryotoxicity-studies-of-key-non-artemisinin-antimalarials-and-use-in-women-in-the-first-trimester
#14
REVIEW
Robert L Clark
The World Health Organization currently recommends quinine+clindamycin for use against malaria in the first trimester. This may soon change to recommending artemisinin-based combination therapies (standard duration of dosing = 3 days). The non-artemisinin partner drugs include amodiaquine, lumefantrine, mefloquine, piperaquine, sulfadoxine+pyrimethamine, and pyronaridine. For quinine, clindamycin, and mefloquine and the combinations of sulfadoxine+pyrimethamine and artemether+lumefantrine, there are reports (including studies without internal comparison groups) that combined describe 304 to >1100 exposures of women in the first trimester for each drug with no conclusive evidence of adverse effects on pregnancy at therapeutic doses...
June 24, 2017: Birth defects research
https://www.readbyqxmd.com/read/28646537/explaining-infant-feeding-the-role-of-previous-personal-and-vicarious-experience-on-attitudes-subjective-norms-self-efficacy-and-breastfeeding-outcomes
#15
Naomi C Bartle, Kate Harvey
OBJECTIVES: Breastfeeding confers important health benefits to both infants and their mothers, but rates are low in the United Kingdom and other developed countries despite widespread promotion. This study examined the relationships between personal and vicarious experience of infant feeding, self-efficacy, the theory of planned behaviour variables of attitudes and subjective norm, and the likelihood of breastfeeding at 6-8 weeks post-natally. DESIGN: A prospective questionnaire study of both first-time mothers (n = 77) and experienced breastfeeders (n = 72) recruited at an antenatal clinic in South East England...
June 23, 2017: British Journal of Health Psychology
https://www.readbyqxmd.com/read/28646532/acquired-bilateral-telangiectasia-macularis-eruptiva-perstans-a-unique-clinical-feature-of-photodamaging-rather-than-a-subtype-of-cutaneous-mastocytosis
#16
Hye-Rim Moon, Young Jae Kim, Joon Min Jung, Chong Hyun Won, Mi Woo Lee, Jee Ho Choi, Sung Eun Chang
Telangiectasia macularis eruptiva perstans (TMEP) is a rare subtype of cutaneous mastocytosis, characterized by telangiectatic tan to brown macules on the trunk and extremities. Although TMEP has been descried as an uncommon disease in the literature, we often encounter patients with TMEP lesions in the outpatient clinic. We aimed to assess the clinical and histopathological characteristics of acquired bilateral TMEP, and the pathophysiological mechanism of acquired bilateral TMEP among these patients. We retrospectively reviewed 30 patients (28 men and 2 women) with acquired bilateral TMEP; multiple telangiectatic dark red to brown macules that were symmetrically distributed...
June 23, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28646512/wmj-8-b-a-novel-hydroxamate-derivative-induces-mda-mb-231-breast-cancer-cell-death-via-shp-1-stat3-survivin-cascade
#17
Yu-Fan Chuang, Shiu-Wen Huang, Ya-Fen Hsu, Meng-Chieh Yu, George Ou, Wei-Jan Huang, Ming-Jen Hsu
BACKGROUND AND PURPOSE: Histone deacetylase (HDAC) inhibitors with broad-spectrum anti-tumor properties has been described and attracted lots of attention in the field of drug discovery. However, the underlying anti-tumor mechanisms of HDAC inhibitors remain incompletely understood. In this study, we aimed to characterize the underlying mechanisms of a novel hydroxamate-based HDAC inhibitor, WMJ-8-B, in inducing MDA-MB-231 breast cancer cell death. EXPERIMENTAL APPROACH: WMJ-8-B's effects on cell viability, cell cycle distribution, apoptosis, as well as signaling molecules modification and activation were analyzed by MTT assay, flowcytometric analysis, immunoblotting, reporter assay, ChIP analysis and siRNA strategy...
June 23, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28646502/the-liver-gut-microbiota-axis-modulates-hepatotoxicity-of-tacrine-in-the-rat
#18
Lian Yee Yip, Chiu Cheong Aw, Sze Han Lee, Yi Shuen Hong, Han Chen Ku, Winston Hecheng Xu, Jessalyn Mei Xuan Chan, Eleanor Jing Yi Cheong, Kern Rei Chng, Amanda Hui Qi Ng, Niranjan Nagarajan, Ratha Mahendran, Yuan Kun Lee, Edward R Browne, Eric Chun Yong Chan
The gut microbiota possesses diverse metabolic activities but its contribution towards heterogeneous toxicological responses is poorly understood. Here, we elucidate the role of the liver-gut microbiota axis in underpinning the hepatotoxicity of tacrine. We employed an integrated strategy combining pharmacokinetics, toxicology, metabonomics, genomics and metagenomics to elucidate and validate the mechanism of tacrine-induced hepatotoxicity in Lister hooded rats. Pharmacokinetic studies in rats demonstrated 3...
June 23, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28646492/prenatal-perinatal-and-neonatal-risk-factors-for-perinatal-arterial-ischaemic-stroke-a-systematic-review-and-meta-analysis
#19
REVIEW
C Li, J K Miao, Y Xu, Y Y Hua, Q Ma, L L Zhou, H J Liu, Q X Chen
The aim of the present study was to perform a meta-analysis of published data to determine the significance of clinical factors and exposures to the risk of perinatal arterial ischaemic stroke (PAIS) and provide guidance for clinical diagnosis and treatment. A comprehensive literature search of the PubMed, Embase, MEDLINE and Cochrane Library databases for relevant observational studies (cohort/case-control) from March 1984 to March 2016 was undertaken. Two review authors independently examined the full text records to determine which studies met the inclusion criteria and evaluated risk factors for PAIS...
June 24, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28646487/immunotoxic-effects-of-thymus-in-mice-following-exposure-to-nanoparticulate-tio2
#20
Fashui Hong, Yaoming Zhou, Yingjun Zhou, Ling Wang
Titanium dioxide nanoparticles (TiO2 NPs) have been extensively used in industry, medicine, and daily life, and have shown potential toxic effects for animals or humans. We noted that the effects of TiO2 NPs on the immune system and its mechanism of action in animals or humans have not been elucidated. Thus, mice were exposed to the TiO2 NPs (0, 1.25, 2.5, or 5 mg kg(-1) body weight) for 9 consecutive months. Exposure to TiO2 NPs was accumulated in the thymus, leading to a decrease in body weight and increases in the weight of the thymus or thymus indices...
June 24, 2017: Environmental Toxicology
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