51,445 results match your criteria impact species


Microplastics from miscellaneous plastic wastes: Physico-chemical characterization and impact on fish and amphibian development.

Ecotoxicol Environ Saf 2021 Sep 15;225:112775. Epub 2021 Sep 15.

Department of Earth and Environmental Sciences, Research Centre POLARIS, University of Milano - Bicocca, Milano, Italy. Electronic address:

Microplastic pollution represents a global problem with negative impacts on aquatic environment and organisms' health. To date, most of the laboratory toxicological studies on microplastics (MPs) have made use of single commercial micro and nano-polymers, which do not reflect the heterogeneity of environmental MPs. To improve the relevance of the hazard assessment, micrometer-sized plastic particles of miscellaneous non-reusable waste plastics, with size <100 µm and <50 µm (waste microplastics, wMPs), were characterized by microscopic and spectroscopic techniques and tested on developing zebrafish and Xenopus laevis by FET and FETAX assays respectively. Read More

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September 2021

Peptide Presentations of Marsupial MHC Class I Visualize Immune Features of Lower Mammals Paralleled with Bats.

J Immunol 2021 Sep 17. Epub 2021 Sep 17.

School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China;

Marsupials are one of three major mammalian lineages that include the placental eutherians and the egg-laying monotremes. The marsupial brushtail possum is an important protected species in the Australian forest ecosystem. Molecules encoded by the MHC genes are essential mediators of adaptive immune responses in virus-host interactions. Read More

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September 2021

Evaluation of a novel controlled-atmosphere flexible microtube plasma soft ionization source for the determination of BTEX in olive oil by headspace-gas chromatography/mass spectrometry.

Anal Chim Acta 2021 Sep 7;1179:338835. Epub 2021 Jul 7.

ISAS-Leibniz-Institut für Analytische Wissenschaften, Dortmund, 44139, Germany.

Although electron impact ionization (EI) remains the standard ionization source for GC-MS, it presents extensive fragmentation as its main limitation. The potential of a novel plasma-based soft ionization source named controlled-atmosphere flexible microtube plasma (CA-FμTP) has been evaluated in this work for the determination of monoaromatic volatile BTEX group (namely benzene, toluene, ethylbenzene, and o-, m- and p-xylenes) in olive oil, based on headspace technique. The obtained results show an attractive advantage over EI due to no fragmentation was observed. Read More

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September 2021

Prevalence and risk factors associated with asymptomatic malaria among school children: repeated cross-sectional surveys of school children in two ecological zones in Ghana.

BMC Public Health 2021 Sep 17;21(1):1697. Epub 2021 Sep 17.

Department of Epidemiology, College of Health Sciences, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana.

Background: Asymptomatic Plasmodium infections significantly drive malaria transmission and impact control and elimination strategies, but are largely uncharacterized. We investigated the prevalence and risk factors of asymptomatic malaria infections to inform malaria control strategies in Ghana.

Method: Five cross-sectional surveys were conducted at the end of the peak transmission season (August-September) on 4892 school children aged between 6 and 14 years in two distinct ecological settings in Ghana between 2013 and 2017. Read More

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September 2021

Better together: Cross-tolerance induced by warm acclimation and nitrate exposure improved the aerobic capacity and stress tolerance of common carp Cyprinus carpio.

Ecotoxicol Environ Saf 2021 Sep 14;225:112777. Epub 2021 Sep 14.

University of Antwerp, Department of Biology, Systemic Physiological and Ecotoxicological Research (SPHERE), Groenenborgerlaan 171, 2020 Antwerp, Belgium.

Climate warming is a threat of imminent concern that may exacerbate the impact of nitrate pollution on fish fitness. These stressors can individually affect the aerobic capacity and stress tolerance of fish. In combination, they may interact in unexpected ways where exposure to one stressor may heighten or reduce the resilience to another stressor and their interactive effects may not be uniform across species. Read More

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September 2021

Fatty acid profile as an efficient bioindicator of PCB bioaccumulation in a freshwater lake food web: A stable isotope guided investigation.

J Hazard Mater 2021 Sep 6;423(Pt B):127121. Epub 2021 Sep 6.

National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address:

In past studies, the health and ecological risks of PCBs are well established. The impact of low-dose PCBs on aquatic ecosystems for an extended period is a matter of concern in the current era. The application of fatty acids (FAs) as bioindicators of pollution in the freshwater food web is almost unavailable. Read More

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September 2021

Putative neural consequences of captivity for elephants and cetaceans.

Rev Neurosci 2021 Sep 16. Epub 2021 Sep 16.

Whale Sanctuary Project, Kanab, UT, 84741, USA.

The present review assesses the potential neural impact of impoverished, captive environments on large-brained mammals, with a focus on elephants and cetaceans. These species share several characteristics, including being large, wide-ranging, long-lived, cognitively sophisticated, highly social, and large-brained mammals. Although the impact of the captive environment on physical and behavioral health has been well-documented, relatively little attention has been paid to the brain itself. Read More

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September 2021

Approaches to oocyte meiotic arrest in vitro and impact on oocyte developmental competence.

Biol Reprod 2021 Sep 17. Epub 2021 Sep 17.

Fertility & Research Centre, School of Women's & Children's Health, University of New South Wales Sydney, NSW 2052, Australia.

Oocytes are maintained in a state of meiotic arrest following the first meiotic division until ovulation is triggered. Within the antral follicle, meiotic arrest is actively suppressed in a process facilitated by the cyclic nucleotides cGMP and cAMP. If removed from this inhibitory follicular environment and cultured in vitro, mammalian oocytes undergo spontaneous meiotic resumption in the absence of the usual stimulatory follicular stimuli, leading to asynchronicity with oocyte cytoplasmic maturation and lower developmental competence. Read More

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September 2021

The evolutionary and physiological significance of the Hif pathway in teleost fishes.

J Exp Biol 2021 Sep 17;224(18). Epub 2021 Sep 17.

Department of Biology, University of Ottawa, 30 Marie Curie, Ottawa, ON, Canada, K1N 6N5.

The hypoxia-inducible factor (HIF) pathway is a key regulator of cellular O2 homeostasis and an important orchestrator of the physiological responses to hypoxia (low O2) in vertebrates. Fish can be exposed to significant and frequent changes in environmental O2, and increases in Hif-α (the hypoxia-sensitive subunit of the transcription factor Hif) have been documented in a number of species as a result of a decrease in O2. Here, we discuss the impact of the Hif pathway on the hypoxic response and the contribution to hypoxia tolerance, particularly in fishes of the cyprinid lineage, which includes the zebrafish (Danio rerio). Read More

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September 2021

Phenology and flowering overlap drive specialisation in plant-pollinator networks.

Ecol Lett 2021 Sep 17. Epub 2021 Sep 17.

Department of Environmental Science and Policy, University of California-Davis, Davis, California, USA.

Variation in dietary specialisation stems from fundamental interactions between species and their environment. Consequently, understanding the drivers of this variation is key to understanding ecological and evolutionary processes. Dietary specialisation in wild bees has received attention due to their close mutualistic dependence on plants, and because both groups are threatened by biodiversity loss. Read More

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September 2021

Differential Transcriptomic Regulation in Sweet Orange Fruit ( L. Osbeck) Following Dehydration and Rehydration Conditions Leading to Peel Damage.

Front Plant Sci 2021 31;12:732821. Epub 2021 Aug 31.

Department of Food Biotechnology, Institute of Agrochemistry and Food Technology-Consejo Superior de Investigaciones Cientificas (IATA-CSIC), Valencia, Spain.

Water stress is the most important environmental agent that contributes to the crop productivity and quality losses globally. In citrus, water stress is the main driver of the fruit peel disorders that impact the quality and market ability. An increasingly present post-harvest peel disorder is non-chilling peel pitting (NCPP). Read More

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The biogeographic differentiation of algal microbiomes in the upper ocean from pole to pole.

Nat Commun 2021 Sep 16;12(1):5483. Epub 2021 Sep 16.

U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.

Eukaryotic phytoplankton are responsible for at least 20% of annual global carbon fixation. Their diversity and activity are shaped by interactions with prokaryotes as part of complex microbiomes. Although differences in their local species diversity have been estimated, we still have a limited understanding of environmental conditions responsible for compositional differences between local species communities on a large scale from pole to pole. Read More

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September 2021

Ozone pollution, oxidative stress, synaptic plasticity, and neurodegeneration.

Neurologia (Engl Ed) 2021 Sep 13. Epub 2021 Sep 13.

Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico. Electronic address:

Introduction: Overpopulation and industrial growth result in an increase in air pollution, mainly due to suspended particulate matter and the formation of ozone. Repeated exposure to low doses of ozone, such as on a day with high air pollution levels, results in a state of chronic oxidative stress, causing the loss of dendritic spines, alterations in cerebral plasticity and in learning and memory mechanisms, and neuronal death and a loss of brain repair capacity. This has a direct impact on human health, increasing the incidence of chronic and degenerative diseases. Read More

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September 2021

Superparasitism and fitness parameters in three native wasp parasitoids (Braconidae: Opiinae) of the Mexican fruit fly, (Diptera: Tephritidae).

Bull Entomol Res 2021 Sep 17:1-8. Epub 2021 Sep 17.

Programa Moscafrut SENASICA-SADER, Camino a los Cacaotales S/N, Metapa de Domínguez, Chiapas, 30860, México.

Knowledge on reproductive strategies and host use in insect parasitoids is fundamental for biological control purposes. Superparasitism and multiparasitism, oviposition in a previously parasitized host by a female of the same or different species, respectively, may impact pest management decisions. Our objective was to determine the occurrence of superparasitism and multiparasitism in three species of native larval-pupal solitary endoparasitoids that attack Anastrepha Shiner species (Diptera: Tephritidae) in the Neotropical region, and the possible effect on offspring fitness parameters. Read More

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September 2021

N-acetyl cysteine ameliorates aortic fibrosis by promoting M2 macrophage polarization in aging mice.

Redox Rep 2021 Dec;26(1):170-175

Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China.

Vascular fibrosis is a universal phenomenon associated with aging, and oxidative stress plays an important role in the genesis of vascular damage in line with the aging process. However, whether antioxidants can ameliorate vascular fibrosis remains unclear. The present study was to determine antioxidant N-acetylcysteine (NAC) could ameliorates aortic fibrosis in aging wild-type C57BL/6 mice. Read More

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December 2021

Microbial adaptation and response to high ammonia concentrations and precipitates during anaerobic digestion under psychrophilic and mesophilic conditions.

Water Res 2021 Aug 26;204:117596. Epub 2021 Aug 26.

Institute for a Sustainable Environment, Clarkson University, Potsdam 13699, NY, USA; Civil and Environmental Engineering, Clarkson University, Potsdam 13699, NY, USA. Electronic address:

This study explored microbial adaptation to high ammonia concentrations (<1000 mg/L to 4000 mg/L) during anaerobic digestion (AD) under psychrophilic and mesophilic conditions, the latter of which yielded precipitates facilitating investigation of microbial response. The experimental setup was performed at bench-scale using microbial consortia from four different operating anaerobic digesters treating different organic wastes (WW-wastewater sludge, MN-manure, FW- food waste and CO-co-digestion (FW & MN)). Adaptation experiments were conducted with semi-continuous flow mode to resemble large-scale operation. Read More

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The impact of the gut microbiome on toxigenic bacteria.

Microb Pathog 2021 Sep 13;160:105188. Epub 2021 Sep 13.

Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran. Electronic address:

Millions of symbiotic and pathogenic microorganisms known as microbiota colonize the host body. The microbiome plays an important role in human health and colonizes hundreds of different species of multicellular organisms so that they are introduced as the metaorganisms. Changes in the microbial population of the gut microbiome may cause resistance to pathogenic bacteria-induced infection. Read More

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September 2021

Estimating the Number of Illnesses Caused by Agents Transmitted Commonly Through Food: A Scoping Review.

Foodborne Pathog Dis 2021 Sep 16. Epub 2021 Sep 16.

(Retired) Centers for Disease Control and Prevention, Atlanta, Georgia, USA.

Estimates of the overall human health impact of agents transmitted commonly through food complement surveillance and help guide food safety interventions and regulatory initiatives. The purpose of this scoping review was to summarize the methods and reporting practices used in studies that estimate the total number of illnesses caused by these agents. We identified and included 43 studies published from January 1, 1995, to December 31, 2019, by searching PubMed and screening selected articles for other relevant publications. Read More

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September 2021

Moving on up: Vertical distribution shifts in rocky reef fish species during climate-driven decline in dissolved oxygen from 1995 to 2009.

Glob Chang Biol 2021 Sep 16. Epub 2021 Sep 16.

Marine Science Institute, University of California, Santa Barbara, CA, USA.

Anthropogenic climate change has resulted in warming temperatures and reduced oxygen concentrations in the global oceans. Much remains unknown on the impacts of reduced oxygen concentrations on the biology and distribution of marine fishes. In the Southern California Channel Islands, visual fish surveys were conducted frequently in a manned submersible at three rocky reefs between 1995 and 2009. Read More

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September 2021

Crystallographic approach to fragment-based hit discovery against Schistosoma mansoni purine nucleoside phosphorylase.

Biochem J 2021 Sep 16. Epub 2021 Sep 16.

Universidade de Brasilia, Brasilia, Brazil.

Several Schistosoma species cause Schistosomiasis, an endemic disease in 78 countries that is ranked second amongst the parasitic diseases in terms of its socioeconomic impact and human health importance. The drug recommended for treatment by the WHO is praziquantel (PZQ), but there are concerns associated with PZQ, such as the lack of information about its exact mechanism of action, its high price, its effectiveness - which is limited to the parasite's adult form - and reports of resistance. The parasites lack the de novo purine pathway, rendering them dependent on the purine salvage pathway or host purine bases for nucleotide synthesis. Read More

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September 2021

Mesenchymal stromal cell-secreted CCL2 promotes antibacterial defense mechanisms through increased antimicrobial peptide expression in keratinocytes.

Stem Cells Transl Med 2021 Sep 16. Epub 2021 Sep 16.

Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA.

Mesenchymal stromal cells (MSCs) from both humans and horses, which represent a clinically relevant translation animal model for human cutaneous wound healing, were recently found to possess antimicrobial properties against planktonic bacteria, and in the case of equine MSCs, also against biofilms. This, together with previous findings that human and equine MSCs promote angiogenesis and wound healing, makes these cells an attractive approach to treat infected cutaneous wounds in both species. The anti-biofilm activities of equine MSC, via secretion of cysteine proteases, have only been demonstrated in vitro, thus lacking information about in vivo relevance. Read More

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September 2021

[Pulmonary artery denervation in pulmonary hypertension: physiological and clinical aspects].

Angiol Sosud Khir 2021 ;27(3):16-21

Laboratory of Physiology of Visceral Systems named after Academician K.M. Bykov, Institute of Experimental Medicine, Saint Petersburg, Russia.

This article is a review of the findings of experimental and clinical studies of a new method of treatment of pulmonary hypertension - pulmonary artery denervation with the help of radiofrequency ablation, cryodenervation and ultrasonic impact. Pulmonary artery denervation results in decreased neurogenic tonic sympathetic and, probably, increased parasympathetic effects on pulmonary vessels. On models of experimental monocrotaline-induced pulmonary hypertension in various-species animals, it was determined that pulmonary artery denervation is followed by decreased activity of local pulmonary renin-angiotensin system, slowed processes of remodeling of pulmonary vessels, hypertrophy and fibrosis of the right ventricle, with inhibition of progression of pulmonary hypertension by means of suppression of extracellular signal-regulated kinase 1/2 (ERK 1/2) which regulates differentiation, proliferation and migration of smooth muscle cells. Read More

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September 2021

Anticancer, anti-proliferative activity of plant extracts.

J Cancer Res Ther 2021 Jul-Sep;17(4):879-886

Department of Chemistry, College of Science, King Khalid University, Abha, Saudi Arabia.

Purpose: Medical halophytes plants are potent sources of bioactive secondary metabolite components used against different diseases. Avicenniamarina one of the typical halophytes plant species used in folk medicine to treat smallpox, rheumatism, and ulcer. Despite the richness of A. Read More

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September 2021

Pyridostigmine bromide, chlorpyrifos, and DEET combined Gulf War exposure insult depresses mitochondrial function in neuroblastoma cells.

J Biochem Mol Toxicol 2021 Sep 15:e22913. Epub 2021 Sep 15.

Laboratory of Molecular Biology, VA New Jersey Health Care System, Research & Development (Mailstop 15), East Orange, New Jersey, USA.

Gulf War Illness (GWI) is defined by the Centers for Disease Control and Prevention (CDC) as a multi-symptom illness having at least one symptom from two of three factors, which include: fatigue, mood-cognition problems, and musculoskeletal disorders. The cluster of long-term symptoms is unique to military personnel from coalition countries including United States, Australia, and the United Kingdom that served in Operation Desert Storm from 1990 to 1991. Reporting of these symptoms is much lower among soldiers deployed in other parts of the world like Bosnia during the same time period. Read More

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September 2021

Differences in faecal microbiome composition between adult patients with UCD and PKU and healthy control subjects.

Mol Genet Metab Rep 2021 Dec 8;29:100794. Epub 2021 Sep 8.

Department of Dietetics and Nutritional science and Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, Amsterdam, the Netherlands.

Urea cycle disorders (UCDs) are a group of rare inherited metabolic diseases causing hyperammonemic encephalopathy. Despite intensive dietary and pharmacological therapy, outcome is poor in a subset of UCD patients. Reducing ammonia production by changing faecal microbiome in UCD is an attractive treatment approach. Read More

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December 2021

Genetic Association in the Maintenance of the Mitochondrial Microenvironment and Sperm Capacity.

Oxid Med Cell Longev 2021 4;2021:5561395. Epub 2021 Sep 4.

School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan.

Sperm motility is one of the major determinants of male fertility. Since sperm need a great deal of energy to support their fast movement by active metabolism, they are thus extremely vulnerable to oxidative damage by the reactive oxygen species (ROS) and other free radicals generated as byproducts in the electron transport chain. The present study is aimed at understanding the impact of a mitochondrial oxidizing/reducing microenvironment in the etiopathology of male infertility. Read More

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September 2021

PacBio Single-Molecule Long-Read Sequencing Provides New Light on the Complexity of Full-Length Transcripts in Cattle.

Front Genet 2021 30;12:664974. Epub 2021 Aug 30.

Laboratory of Molecular Biology and Bovine Breeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.

Cattle () is one of the most widely distributed livestock species in the world, and provides us with high-quality milk and meat which have a huge impact on the quality of human life. Therefore, accurate and complete transcriptome and genome annotation are of great value to the research of cattle breeding. In this study, we used error-corrected PacBio single-molecule real-time (SMRT) data to perform whole-transcriptome profiling in cattle. Read More

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Review: Insights on Current FDA-Approved Monoclonal Antibodies Against Ebola Virus Infection.

Front Immunol 2021 30;12:721328. Epub 2021 Aug 30.

Global Medical Affairs, Ridgeback Biotherapeutics, Miami, FL, United States.

The unprecedented 2013-2016 West Africa Ebola outbreak accelerated several medical countermeasures (MCMs) against Ebola virus disease (EVD). Several investigational products (IPs) were used throughout the outbreak but were not conclusive for efficacy results. Only the Randomized Controlled Trial (RCT) on ZMapp was promising but inconclusive. Read More

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Environmental performance of blue foods.

Nature 2021 Sep 15;597(7876):360-365. Epub 2021 Sep 15.

Stockholm Resilience Centre, Stockholm, Sweden.

Fish and other aquatic foods (blue foods) present an opportunity for more sustainable diets. Yet comprehensive comparison has been limited due to sparse inclusion of blue foods in environmental impact studies relative to the vast diversity of production. Here we provide standardized estimates of greenhouse gas, nitrogen, phosphorus, freshwater and land stressors for species groups covering nearly three quarters of global production. Read More

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September 2021

Past environmental changes affected lemur population dynamics prior to human impact in Madagascar.

Commun Biol 2021 Sep 15;4(1):1084. Epub 2021 Sep 15.

Institute of Zoology, University of Veterinary Medicine Hannover, Bünteweg 17, 30559, Hannover, Germany.

Quaternary climatic changes have been invoked as important drivers of species diversification worldwide. However, the impact of such changes on vegetation and animal population dynamics in tropical regions remains debated. To overcome this uncertainty, we integrated high-resolution paleoenvironmental reconstructions from a sedimentary record covering the past 25,000 years with demographic inferences of a forest-dwelling primate species (Microcebus arnholdi), in northern Madagascar. Read More

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September 2021