17,398 results match your criteria ros addition

The Protective Effects of Alpha Lipoic Acid on Human Sperm Function During Freezing-Thawing.

Cryo Letters 2020 Nov-Dec;41(6):344-350

Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR; Isfahan Fertility and Infertility Center, Isfahan, Iran. and

Background: Sperm cryopreservation is presently used for conservation of male gametes in assisted reproduction technologies (ART). Despite the benefits of sperm banking, freeze-thawing process is injurious to sperm integrity due to induced oxidative stress by cold stress. Oxidative stress reduces sperm motility, viability and DNA integrity. Read More

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Eicosapentaenoic acid supplemented to in vitro maturation medium results in lesser lipid content and intracellular reactive oxygen species in blastocysts of cattle.

Anim Reprod Sci 2021 May 9;229:106765. Epub 2021 May 9.

IGEVET - Instituto de Genética Veterinaria "Ing. Fernando N Dulout"(UNLP-CONICET LA PLATA), Facultad de Ciencias Veterinarias UNLP, Calles 60 y 118, B1904AMA, La Plata, Buenos Aires, Argentina. Electronic address:

Sub-optimal cattle embryo development to the blastocyst stage still is a problem when conducting in vitro production (IVP) procedures. Supplementation of in vitro maturation (IVM) medium with omega 3-polyunsaturated eicosapentaenoic acid (EPA) is an approach that might have positive effects on lipid metabolism of cattle oocytes, potentially improving subsequent embryo development. The aim of this study was to evaluate effects of EPA addition to serum-free IVM medium on pronuclear formation after in vitro fertilization, cleavage, and blastocyst rates. Read More

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Inhibition of miR-1224 suppresses hypoxia/reoxygenation-induced oxidative stress and apoptosis in cardiomyocytes through targeting GPX4.

Exp Mol Pathol 2021 May 11:104645. Epub 2021 May 11.

Department of Cardiology, Zhuji People's Hospital of Zhejiang Province, Zhuji Affiliated Hospital of Shaoxing University, Zhuji, Zhejiang 311800, China. Electronic address:

We have focused on the underlying role of miR-1224 in cardiomyocyte injury stimulated by hypoxia/reoxygenation (H/R). In the current study, the rat cardiomyocyte cell line H9C2 was used to construct a H/R cell model to validate the cardioprotective effects of miR-1224. Data from the dual-luciferase assay revealed that the glutathione peroxidase 4 (GPX4) was a direct target of miR-1224. Read More

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Inter-domain horizontal gene transfer of nickel-binding superoxide dismutase.

Geobiology 2021 May 14. Epub 2021 May 14.

Department of Earth and Planetary Science, Harvard University, Cambridge, MA, USA.

The ability of aerobic microorganisms to regulate internal and external concentrations of the reactive oxygen species (ROS) superoxide directly influences the health and viability of cells. Superoxide dismutases (SODs) are the primary regulatory enzymes that are used by microorganisms to degrade superoxide. SOD is not one, but three separate, non-homologous enzymes that perform the same function. Read More

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Reactive Oxygen Species Link Gene Regulatory Networks During Root Development.

Front Plant Sci 2021 27;12:660274. Epub 2021 Apr 27.

Faculty of Agriculture, Meijo University, Nagoya, Japan.

Plant development under altered nutritional status and environmental conditions and during attack from invaders is highly regulated by plant hormones at the molecular level by various signaling pathways. Previously, reactive oxygen species (ROS) were believed to be harmful as they cause oxidative damage to cells; however, in the last decade, the essential role of ROS as signaling molecules regulating plant growth has been revealed. Plant roots accumulate relatively high levels of ROS, and thus, maintaining ROS homeostasis, which has been shown to regulate the balance between cell proliferation and differentiation at the root tip, is important for proper root growth. Read More

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-derived y-glutamylcysteine suppresses ER-mediated goblet cell stress and reduces TNBS-driven colonic inflammation.

Gut Microbes 2021 Jan-Dec;13(1):1-21

Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA.

Endoplasmic reticulum (ER) stress compromises the secretion of MUC2 from goblet cells and has been linked with inflammatory bowel disease (IBD). Although can beneficially modulate mucin production, little work has been done investigating the effects of on goblet cell ER stress. We hypothesized that secreted factors from downregulate ER stress genes and modulates the unfolded protein response (UPR) to promote MUC2 secretion. Read More

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Oleuropein attenuates the 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-perturbing effects on pancreatic β-cells.

J Environ Sci Health A Tox Hazard Subst Environ Eng 2021 May 13:1-10. Epub 2021 May 13.

Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea.

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is an endocrine disrupting compound and persistent organic pollutant that has been associated with diabetes in several epidemiological studies. Oleuropein, a major phenolic compound in olive fruit, is a superior antioxidant and radical scavenger. This study aimed to examine the effects of oleuropein against TCDD-induced stress response in a pancreatic beta cell line, INS-1 cells. Read More

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Toxic response of the freshwater green algae Chlorella pyrenoidosa to combined effect of flotation reagent butyl xanthate and nickel.

Environ Pollut 2021 May 3;286:117285. Epub 2021 May 3.

School of Water Resources and Environment, Research Center of Environmental Science and Engineering, China University of Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083, Beijing, China.

Butyl Xanthate (BX) is a typical flotation reagent used to extract non-ferrous nickel ores, discharged into the surrounding environment of mining areas in large quantities. However, few studies have focused on the toxicity of combined pollution of BX and nickel (Ni) on aquatic plants, especially phytoplankton, the main producer of aquatic ecosystems. The toxicity and potential mechanism of single and combined pollution of BX and Ni at different concentrations (0-20 mg L) on typical freshwater algae (Chlorella pyrenoidosa) were studied. Read More

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Exploring the toxic interactions between Bisphenol A and glutathione peroxidase 6 from Arabidopsis thaliana.

Spectrochim Acta A Mol Biomol Spectrosc 2021 Apr 30;259:119891. Epub 2021 Apr 30.

Shandong Province Key Laboratory of Applied Mycology, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China. Electronic address:

As primary industrial raw material, the widespread usage of bisphenol A (BPA) has resulted in sustained release and accumulation in the environment. Besides its endocrine-disrupting character, BPA was reported to generate excessive reactive oxygen species (ROS). However, the potential toxic mechanisms of the BPA-induced oxidative damage to plants were poorly understood. Read More

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A tubular ceramic membrane coated with TiO-P25 for radial addition of HO towards AMX removal from synthetic solutions and secondary urban wastewater.

Environ Sci Pollut Res Int 2021 May 13. Epub 2021 May 13.

Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.

This work aims to integrate several hydrogen peroxide (HO) activation mechanisms, photolysis (UVC irradiation), chemical electron transfer (TiO-P25 photocatalysis), and reaction with TiO-P25 in dark conditions, for reactive oxygen species (ROS) generation towards the removal of contaminants of emerging concern (CECs), in a single unit operated in continuous-flow mode. An HO stock solution is fed by the lumen side of a tubular ceramic membrane, delivering the oxidant to the (i) catalyst immobilized in the membrane shell-side and (ii) annular reaction zone (ARZ, space between membrane shell-side and outer quartz tube) where CECs contaminated water flows with a helix trajectory, being activated by UV light provided by four lamps placed symmetrically around the reactor. First, the effect of several parameters in the removal of a CEC target molecule, amoxicillin (AMX), was evaluated using a synthetic solution ([AMX] = 2. Read More

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Tea Polyphenols Prevent Sepsis-Induced Lung Injury via Promoting Translocation of DJ-1 to Mitochondria.

Front Cell Dev Biol 2021 26;9:622507. Epub 2021 Apr 26.

Emergency Department, Cangzhou Central Hospital, Cangzhou, China.

Background: Sepsis is the systemic inflammatory response syndrome caused by infection, which commonly targets on the lung. Tea polyphenols (TP) have many pharmacological activities, but their role in sepsis induced lung injury remains unclear.

Results: Injection of TP after cecal ligation and puncture (CLP) operation elevated the survival rate in a concentration dependent manner. Read More

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Antimicrobial peptide 17BIPHE2 inhibits the proliferation of lung cancer cells and by regulating the ERK signaling pathway.

Oncol Lett 2021 Jul 28;22(1):501. Epub 2021 Apr 28.

Department of Laboratory Medicine, College of Clinical Medicine, Shuangyi Campus, Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region 750004, P.R. China.

In 2018, there were 18.1 million new cancer cases and 9.6 million cancer-related deaths worldwide, among which the incidence rate of lung cancer (11. Read More

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Effects of Silver Nanoparticles and Silver Nitrate on mRNA and microRNA Expression in Human Hepatocellular Carcinoma Cells (HepG2).

J Nanosci Nanotechnol 2021 Nov;21(11):5414-5428

US Environmental Protection Agency, Retired from EPA, Durham NC 27709, USA.

In order to understand toxicity of nano silver, human hepatocellular carcinoma (HepG2) cells were treated either with silver nitrate (AgNO₃) or with nano silver capped with glutathione (Ag-S) at various concentration. Differentially expressed genelists for mRNA and microRNA were obtained through Illumina RNA sequencing and DEseq data analyses. Both treatments showed non-linear dose response relationships for mRNA and microRNA. Read More

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November 2021

Assessment of Mitochondrial Function and Developmental Potential of Mouse Oocytes after Mitoquinone Supplementation during Vitrification.

J Am Assoc Lab Anim Sci 2021 May 12. Epub 2021 May 12.

Vitrification negatively affects the mitochondrial membrane potential (ΔΨm) in oocytes while also leading to increased reactive oxygen species (ROS), ATP depletion and induction of apoptosis in oocytes. Mitoquinone (MitoQ) is an antioxidant that protects mitochondrial membrane integrity from ROS. This study examined the effect of adding MitoQ to vitrification medium on mitochondrial function and embryo development in vitrified oocytes. Read More

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The use of different sublethal endpoints to monitor atrazine toxicity in nematode Caenorhabditis elegans.

Chemosphere 2021 Jul 3;274:129845. Epub 2021 Feb 3.

Nanjing Institute of Environmental Science, Ministry of Ecology and Environment, Nanjing, 210042, China. Electronic address:

In this work, Caenorhabditis elegans was employed as an in vivo model to determine the toxic effects of atrazine at different concentrations. After the exposure period from the larval stage L1 to adulthood day 1, atrazine (10 mg/L) significantly decreased the body length and lifespan of nematodes. In addition, exposure to ≥0. Read More

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Crystalline ruthenium polypyridine nanoparticles: a targeted treatment of bacterial infection with multifunctional antibacterial, adhesion and surface-anchoring photosensitizer properties.

J Mater Chem B 2021 May;9(18):3808-3825

School of Life Sciences, Anhui Agricultural University, Hefei, 230036, China.

Photodynamic antibacterial therapy employs nanocomposites as an alternative to traditional antibiotics for the treatment of bacterial infections. However, many of these antibacterial materials are less effective towards bacteria than traditional drugs, either due to poor specificity or antibacterial activity. This can result in needless and excessive drug use in treatments. Read More

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Inhibition of γH2AX, COX-2 and regulation of antioxidant enzymes in MPP-exposed SH-SY5Y cells pre-treated with rutin.

Metab Brain Dis 2021 May 12. Epub 2021 May 12.

Department of Medical Biosciences, University of the Western Cape, Robert Sobukwe Road, Private Bag X17, Bellville, 7535, South Africa.

Many plant-derived bioactive compounds such as rutin are reportedly effective in attenuating neuronal death in most neurodegenerative disorders. Parkinson's disease (PD) is characterized by the gradual degeneration of dopaminergic neurons in the substantia nigra of the midbrain, and has previously been modelled in-vitro through the specific neurotoxic activity of 1-methyl-4-phenylpyridinium (MPP) on dopaminergic neurons. Rutin is a bioflavonoid with multiple pharmacological effects, and this study investigated the neuroprotective effects of rutin in the human dopaminergic SH-SY5Y cell line using the neurotoxin MPP. Read More

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Rotundic acid reduces LPS-induced acute lung injury in vitro and in vivo through regulating TLR4 dimer.

Phytother Res 2021 May 11. Epub 2021 May 11.

College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China.

Acute lung injury (ALI) is a serious clinical disease. Rotundic acid (RA), a natural ingredient isolated from Ilex rotunda Thunb, exhibits multiple pharmacological activities. However, RA's therapeutic effect and mechanism on ALI remain to be elucidated. Read More

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Cadmium inhibits neural stem/progenitor cells proliferation via MitoROS-dependent AKT/GSK-3β/β-catenin signaling pathway.

J Appl Toxicol 2021 May 11. Epub 2021 May 11.

School of Public Health and Key Laboratory of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, China.

Cadmium (Cd) is a toxic heavy metal widely found in the environment. Cd is also a potential neurotoxicant, and its exposure is associated with impairment of cognitive function. However, the underlying mechanisms by which Cd induces neurotoxicity are unclear. Read More

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Isolation, structural characterization and neuroprotective activity of exopolysaccharide from Paecilomyces cicada TJJ1213.

Int J Biol Macromol 2021 May 8;183:1034-1046. Epub 2021 May 8.

College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China. Electronic address:

Two exopolysaccharide fractions (EPS1 and EPS2) were obtained from Paecilomyces cicadae TJJ 1213, and their structures were elucidated. The EPS1 and EPS2 were mainly composed of mannose and galactose with molar ratios of 3.2: 1. Read More

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Dynamic changes in Beclin-1, LC3B and p62 at various time points in mice with temporary middle cerebral artery occlusion and reperfusion (tMCAO).

Brain Res Bull 2021 May 8. Epub 2021 May 8.

School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, PR China. Electronic address:

Ischaemic stroke is attributable to cerebrovascular disease and is associated with high morbidity, disability, mortality and recurrence. Autophagy is a critical mediator and plays dual roles in ischaemic stroke. Autophagy can protect against ischaemic brain injury during the early stage of ischaemic stroke, while excessive autophagy can induce apoptosis and exacerbate brain injury. Read More

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Cryopreservation of Dog Spermatozoa Using Essential and Non-Essential Amino Acids Solutions in An Egg Yolk-Free Polyvinyl Alcohol Extender.

Cryo Letters 2021 Jan-Feb;42(1):44-52

Laboratory of Theriogenology and Reproductive Biotechnology, College of Veterinary Medicine and Bio-safety Research Institute, Jeonbuk National University, Iksan, Republic of Korea.

Background: Amino acids (AAs) have been indicated to have cryoprotective and antioxidative effects on sperm freezing using egg yolk (EY)-based extender. However, EY-based extender is difficult to be standardized for the effect of amino acids because the EY composition varies with the animal's diet.

Objective: To test the effect of AAs in EY-free polyvinyl alcohol (EY-free PVA) extender and develop a chemically defined extender for dog sperm cryopreservation. Read More

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Protective effect of recombinant against HO-induced oxidative stress in HUVEC cells.

J Zhejiang Univ Sci B 2021 May;22(5):348-365

College of Veterinary Medicine, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China.

This study probed the protective effect of recombinant against hydrogen peroxide (HO)-induced oxidative stress in human umbilical vein endothelial cells (HUVECs). We constructed a new functional (NC8-pSIP409-alr-angiotensin-converting enzyme inhibitory peptide (ACEIP)) with a double-gene-labeled non-resistant screen as an expression vector. A 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) colorimetric assay was carried out to determine the cell viability of HUVEC cells following pretreatment with NC8-pSIP409-alr-ACEIP. Read More

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Theranostics of atherosclerosis by the indole molecule-templated self-assembly of probucol nanoparticles.

J Mater Chem B 2021 May 11. Epub 2021 May 11.

Pharmaceutical Engineering Research Center, College of Pharmacy, Chongqing Medical University, Chongqing 400000, China.

Atherosclerosis (AS) is a major cause of cardiovascular diseases, but its effective theranostic measure remains challenging thus far. Macrophages contribute to AS progress in diverse ways such as producing cytokines and reactive oxygen species (ROS), foaming macrophages, and differentiating into pro-inflammatory macrophages. With the aim of constructing a facile and efficacious theranostic system for diagnosis and treatment of AS, a templated self-assembly approach was developed. Read More

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FERONIA restricts Pseudomonas in the rhizosphere microbiome via regulation of reactive oxygen species.

Nat Plants 2021 May 10. Epub 2021 May 10.

Department of Microbiology and Immunology, The University of British Columbia, Vancouver, British Columbia, Canada.

Maintaining microbiome structure is critical for the health of both plants and animals. By re-screening a collection of Arabidopsis mutants affecting root immunity and hormone crosstalk, we identified a FERONIA (FER) receptor kinase mutant (fer-8) with a rhizosphere microbiome enriched in Pseudomonas fluorescens without phylum-level dysbiosis. Using microbiome transplant experiments, we found that the fer-8 microbiome was beneficial. Read More

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Effect of Mito-TEMPO Incorporated Semen Extender on Physico-morphological Attributes and Functional Membrane Integrity of Frozen Thawed Buffalo Spermatozoa.

Cryo Letters 2021 Mar-Apr;42(2):111-119

Division of Biochemistry, ICAR-Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, India.

Background: Sperm mitochondria are the major site of reactive oxygen species (ROS) production and excess production during freezing-thawing process inflicts oxidative damages to spermatozoa. Buffalo spermatozoa are more prone to oxidative damage due to inherently more polyunsaturated fatty acids and low cholesterol to phospholipids ratio in the plasma membrane. A mitochondrial targeted antioxidant, Mito-TEMPO was used in this study. Read More

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Withania coagulans extract attenuates oxidative stress-mediated apoptosis of cerebellar purkinje neurons after ischemia/reperfusion injury.

Metab Brain Dis 2021 May 10. Epub 2021 May 10.

Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, IR, Iran.

Cerebral ischemia/reperfusion (I/R) is known to increase reactive oxygen species (ROS) generation, consequences of oxidative stress (OS), and neuronal death in the susceptible brain areas including the cerebellum. Newly, remarkable attention has been paid to a natural diet with the capability to scavenge ROS. Withania coagulans root extract (WCE) is rich in components with antioxidants properties. Read More

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Oxidative Stress-Mediated YAP Dysregulation Contributes to the Pathogenesis of Pemphigus Vulgaris.

Front Immunol 2021 19;12:649502. Epub 2021 Apr 19.

Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, London, United Kingdom.

(PV) is a life-threatening autoimmune disease manifested with blisters in the skin and mucosa and caused by autoantibodies against adhesion protein desmoglein-3 (Dsg3) expressed in epithelial membrane linings of these tissues. Despite many studies, the pathogenesis of PV remains incompletely understood. Recently we have shown Dsg3 plays a role in regulating the yes-associated protein (YAP), a co-transcription factor and mechanical sensor, and constraining reactive oxygen species (ROS). Read More

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Agitation in a Microcarrier-based Spinner Flask Bioreactor Modulates Homeostasis of Human Mesenchymal Stem Cells.

Biochem Eng J 2021 Apr 27;168. Epub 2021 Jan 27.

Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, Florida, United States.

Human mesenchymal stem cells (hMSCs) are well known in cell therapy due to their secretion of trophic factors, multipotent differentiation potential, and ability for self-renewal. As a result, the number of clinical trials has been steadily increasing over the last decade highlighting the need for in vitro systems capable of producing large quantities of cells to meet growing demands. However, hMSCs are highly sensitive to microenvironment conditions, including shear stress caused by dynamic bioreactor systems, and can lead to alteration of cellular homeostasis. Read More

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The Warburg Effect: Historical Dogma Versus Current Rationale.

Adv Exp Med Biol 2021 ;1269:169-177

Center for Translational Cancer Research, Klinikum rechts der Isar, Technical University Munich, Munich, Germany.

Contrary to Warburg's original thesis, accelerated aerobic glycolysis is not a primary and permanent consequence of dysfunctional mitochondria compensating for a poor ATP yield per mole glucose. Instead, the Warburg effect is an essential part of a "selfish" metabolic reprogramming, which results from the interplay between (normoxic or hypoxic) HIF-1 overexpression, oncogene activation (cMyc, Ras), loss of function of tumor suppressors (mutant p53, mutant PTEN, microRNAs and sirtuins with suppressor functions), activated (PI3K/Akt/mTORC1, Ras/Raf/Mek/Erk/c-Myc) or deactivated (AMPK) signaling pathways, components of the tumor microenvironment, and HIF-1 cooperations with epigenetic mechanisms. Molecular and functional processes of the Warburg effect include (a) considerably accelerated glycolytic fluxes; (b) adequate ATP generation per unit time to maintain energy homeostasis; (c) backup and diversion of glycolytic intermediates facilitating the biosynthesis of nucleotides, nonessential amino acids, lipids, and hexosamines; (d) inhibition of pyruvate entry into mitochondria; (e) excessive formation and accumulation of lactate which stimulates tumor growth and suppression of antitumor immunity (in addition, lactate can serve as an energy source for normoxic cancer cells, contributes to extracellular acidosis, and thus drives malignant progression and resistances to conventional therapies); (f) maintenance of the cellular redox homeostasis and low ROS formation; and (g) HIF-1 overexpression, mutant p53, and mutant PTEN which inhibit mitochondrial biogenesis and functions, thus negatively impacting cellular respiration rate. Read More

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