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As one of the main environmental pollutants and occupational hazards, nickel has been reported to have mutagenic, carcinogenic, and teratogenic properties, as well as reproductive toxicity. However, how nickel affects human reproduction is still unclear. In this study, the toxicity of nickel on human sperm and the underlying mechanisms were evaluated in vitro. We found that NiCl2 (10, 50, and 250 μM) impaired sperm total motility and progressive motility in a dose- and time-dependent manner. In addition, sperm hyperactivation and the ability of human sperm to penetrate a viscous medium were found to be compromised after nickel exposure. Mechanically, NiCl2 significantly inhibited the basal intracellular Ca2+ signaling. Besides, reactive oxygen species (ROS), superoxide, and malondialdehyde levels were increased in human sperm after exposure to different concentrations of NiCl2. Consistently, eliminating excess ROS by N-acetyl-L-cysteine or tocopherol significantly alleviated nickel-impaired sperm motility. Taken together, these results revealed that nickel could compromise sperm functions by interfering with Ca2+ signaling and inducing excessive oxidative stress. These findings suggest that, in the high and occupational nickel exposure environments, the contribution of nickel toxicity to the males who wish to preserve their fertility is worthy of careful evaluation.1,2-Dichloroethane (1,2-DCE) is a pervasive environmental pollutant, and overexposure to this hazardous material causes brain edema and demyelination in humans. We found that 1,2-DCE inhibits aquaporin 4 (AQP4) and is a primary pathogenic effector of 1,2-DCE-induced brain edema in animals. However, AQP4 down-regulation's link with cortex demyelination after 1,2-DCE exposure remains unclear. Thus, we exposed wild-type (WT) CD-1 mice and AQP4 knockout (AQP4-KO) mice to 0, 100, 350 and 700 mg/m3 1,2-DCE by inhalation for 28 days. We applied label-free proteomics and a cell co-culture system to elucidate the role of AQP4 inhibition in 1,2-DCE-induced demyelination. selleck kinase inhibitor The results showed that 1,2-DCE down-regulated AQP4 in the WT mouse cortexes. Both 1,2-DCE exposure and AQP4 deletion induced neurotoxicity in mice, including increased brain water content, abnormal pathological vacuolations, and neurobehavioral damage. Tests for interaction of multiple regression analysis highlighted different effects of 1,2-DCE exposcortex demyelination by depressing MBP via AQP4 inhibition in the mice.The synthetic dyes used in the textile industry pollute a large amount of water. Textile dyes do not bind tightly to the fabric and are discharged as effluent into the aquatic environment. As a result, the continuous discharge of wastewater from a large number of textile industries without prior treatment has significant negative consequences on the environment and human health. Textile dyes contaminate aquatic habitats and have the potential to be toxic to aquatic organisms, which may enter the food chain. This review will discuss the effects of textile dyes on water bodies, aquatic flora, and human health. Textile dyes degrade the esthetic quality of bodies of water by increasing biochemical and chemical oxygen demand, impairing photosynthesis, inhibiting plant growth, entering the food chain, providing recalcitrance and bioaccumulation, and potentially promoting toxicity, mutagenicity, and carcinogenicity. Therefore, dye-containing wastewater should be effectively treated using eco-friendly technologies to avoid negative effects on the environment, human health, and natural water resources. This review compares the most recent technologies which are commonly used to remove dye from textile wastewater, with a focus on the advantages and drawbacks of these various approaches. This review is expected to spark great interest among the research community who wish to combat the widespread risk of toxic organic pollutants generated by the textile industries.Early diagnosis of kidney injuries caused by herbs is necessary to enable effective treatments, prevent kidney failure and promote the internationalization and modernization of herbal medicine. Whereas the toxic assessment evidence has not integrated yet, and the evaluation method has not been unanimously agreed. For example, the gold standard assessing toxicity in animals remains to be histopathology, but serum biochemical indexes are the primary measures for monitoring organs dysfunction in humans. In this study, using Sprague Dawley rats, we investigated whether integrated analyses of transcriptomic and metabolomic data with toxicological evidence chain (TEC) concept could identify indicators of injury and provide new insights into the mechanisms of nephrotoxicity. Firstly, the objective phenotype of the animals was observed in detail and the toxicity performance was collected after administration. Subsequently, histopathological examination and serum biochemical toxicity evidence were collected. Next, we xicity evidence, which is applicable to other toxicants originated from herbal medicine based on multi-omics data.
The evidence about the effect of essential trace element (ETE) mixture on cognitive function amongst older adults is limited. This study aims to evaluate the associations of single ETEs and ETE mixture with cognitive function using a representative sample of community-dwelling older adults in China.
A total of 3814 older adults were included in the study. Urinary concentrations of selenium (Se), vanadium (V), cobalt (Co), strontium (Sr), and molybdenum (Mo) were detected by inductively coupled plasma mass spectrometry. Cognitive function in older adults was assessed using the Chinese version of the Mini-Mental State Examination (MMSE). Linear regression and Bayesian kernel machine regression (BKMR) were performed to explore the associations of single ETEs and ETE mixture with cognitive function, respectively.
Linear regression showed that urinary levels of Se and V were positively associated with MMSE scores in the adjusted single-element models. BKMR also showed marginally positive associations of Se a cognitive function, with Se being the most important component within the mixture. Mixture analyses rather than single ETE analyses may provide a real-world perspective on the relationship between ETE mixture and cognitive function. Further cohort studies are needed to clarify the association of multiple ETEs with cognitive function.
Inter-arm blood pressure differences (IADs) are known to be associated with adverse cardiovascular outcomes. We evaluated the distribution of IADs in a large cohort of apparently healthy people and the association of IADs with brachial-ankle pulse wave velocity (baPWV) and coronary artery calcium (CAC).
Blood pressure was measured in both arms of 117,407 people who participated in the Kangbuk Samsung Health Study. IAD was defined as the absolute difference in systolic blood pressure in both arms and was confirmed by measuring the baPWV using an automatic oscillometric device. Arterial stiffness was measured by the baPWV, and CAC was assessed using multi-detector computed tomography.
The mean IAD in the overall subjects was 3.09±2.83mmHg, 6mmHg in the 90th percentile, 8mmHg in the 95th percentile, and 10mmHg in the 97th percentile. In the multivariable-adjusted analysis of 92,949 subjects excluding those with a history of HTN, DM, and cardiovascular disease (CVD), increasing IAD did not statistically increase the risk of developing a CAC >0. However, IAD was associated with a baPWV >1400cm/s (odds ratio [95% confidence interval], 1.23 [1.13-1.35] in the total cohort, 1.19 [1.08-1.31] in males, and 1.39 [1.11-1.73] in females).
More than 97% of all participants had an IAD of 10mmHg or less. IAD was significantly associated with arterial stiffness, reflecting arteriosclerosis, but not with the presence of CAC, reflecting atherosclerosis. IAD may be a valuable tool for the early detection of asymptomatic, low-risk individuals with subclinical arterial disease.
More than 97% of all participants had an IAD of 10 mmHg or less. IAD was significantly associated with arterial stiffness, reflecting arteriosclerosis, but not with the presence of CAC, reflecting atherosclerosis. IAD may be a valuable tool for the early detection of asymptomatic, low-risk individuals with subclinical arterial disease.
Healthcare professionals' high risk of infection and burnout in the first months of the COVID-19 pandemic probably hindered their much-needed preparedness to respond. We aimed to inform how individual and institutional factors contributed for the preparedness to respond during the first months of a public health emergency.
Cross-sectional study.
We surveyed healthcare workers from a Local Health Unit in Portugal, which comprises primary health care centers and hospital services, including public health units and intensive care units, in the second and third months of the COVID-19 epidemic in Portugal. The 460 answers, completed by 252 participants (about 10% of the healthcare workers), were analyzed using descriptive statistics and multiple logistic regressions. We estimated adjusted odds ratios for the readiness and willingness to respond.
Readiness to respond was associated with the perception of adequate infrastructures (aOR=4.04, P<0.005), lack of access to personal protective equipment (aOR=0. be taken into account in the planning of the response of healthcare institutions in future public health emergencies.
To understand the living conditions, changes in the service user profile, and needs of vulnerable migrants trying to access healthcare in the early stages of the COVID-19 pandemic.
Mixed methods study; using quantitative questionnaire data collected from migrant service users of Doctors of the World UK (DOTW UK) with qualitative data from free-text notes.
DOTW UK provides drop-in clinics to vulnerable migrants. Consultations switched to remote during the UK's first lockdown. We compared patient profile, well-being, healthcare access and reason for consultations of individuals attending the virtual clinic between March and September 2020 to those of the prepandemic periods between 2011 and 2018.
During the pandemic, consultations dropped to under half of the prepandemic numbers, with the shift to remote consultations attracting more users outside of London. DOTW UK's user base changed to include a greater proportion of asylum seekers, younger adults (18-34) and individuals reporting good health. Socio-economic conditions and housing stability deteriorated for the majority of users. Those in the greatest need of healthcare appeared to be less able to access remote services. General practitioner (GP) registration remained the most common reason for contacting the virtual clinic with a lack of knowledge of the healthcare system being the main barrier to access.
The shift to virtual consultations may have exacerbated existing inequalities in healthcare access for vulnerable migrants. Given that many clinical services continue to operate remotely, it is important to consider the impact such actions have on vulnerable migrants and find ways to support access.
The shift to virtual consultations may have exacerbated existing inequalities in healthcare access for vulnerable migrants. Given that many clinical services continue to operate remotely, it is important to consider the impact such actions have on vulnerable migrants and find ways to support access.
Homepage: https://www.selleckchem.com/products/AG-490.html
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