228,439 results match your criteria animals oxygen


Bimetal (Fe/Zn) doped BiOI photocatalyst: An effective photodegradation of tetracycline and bacteria.

Chemosphere 2021 May 5;280:130803. Epub 2021 May 5.

Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepción, Concepción, 4070409, Chile. Electronic address:

Tetracycline (TC) is one of the most commonly used broad-spectrum antibiotics to treat the bacterial infection. TC antibiotics enter into the environment because of partial metabolism in the humans and animals, thereby increasing the environmental toxicity. Therefore, it is highly needed to treat TC antibiotics from the water system. Read More

View Article and Full-Text PDF

Photobiomodulation and Antiviral Photodynamic Therapy in COVID-19 Management.

Adv Exp Med Biol 2021 ;1318:517-547

Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, Johannesburg, South Africa.

Coronavirus disease 2019 (COVID-19) has shocked the world by its spread and contagiousness. There is no approved vaccine and no proven treatment for this infection. Some potential treatments that have already been associated with antiviral and anti-inflammatory effects are under investigation. Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

Regulatory signaling pathways in hematopoietic stem cell development.

Yi Chuan 2021 Apr;43(4):295-307

State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.

The blood system provides the body with oxygen and nutrients, maintains the homeostasis of the internal environment through material exchange, and keeps the body with immune defense and protection. Hematopoietic stem cells (HSCs), which are pluripotent adult stem cells with self-renewal and differentiation potential, are the origin of mature blood cells in the body. The production, development and maturation processes of HSCs and their derivatives are the so-called 'hematopoiesis', which begins in the early embryonic development and throughout the life course; any abnormality during these processes can cause the occurrence of hematological diseases. Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

Effects of omega 3 polyunsaturated fatty acids, antioxidants and/or non-steroidal inflammatory drugs in the brain of neonatal rats exposed to intermittent hypoxia.

Int J Dev Neurosci 2021 May 9. Epub 2021 May 9.

Department of Pediatrics, Division of Neonatal-Perinatal Medicine, State University of New York, Downstate Medical Center, Brooklyn, NY, 11203, USA.

Preterm infants experience frequent arterial oxygen desaturations during oxygen therapy, or intermittent hypoxia (IH). Neonatal IH increases oxidative distress which contributes to neuroinflammation and brain injury. We tested the hypotheses that exposure to neonatal IH is detrimental to the immature brain, and that early supplementation with antioxidants and/or omega 3 polyunsaturated fatty acids (n-3 PUFAs) combined with non-steroidal anti-inflammatory drugs (NSAIDs) is protective. Read More

View Article and Full-Text PDF

Assessment of Cerebral Blood Oxygenation by Near-Infrared Spectroscopy before and after Resuscitation in a Rat Asphyxia Cardiac Arrest Model.

Adv Exp Med Biol 2021 ;1269:311-315

Feinstein Institute for Medical Research, Northwell Health System, Manhasset, NY, USA.

Clinical investigators have focused on the real-time evaluation of cerebral blood oxygenation (CBO) by near-infrared spectroscopy (NIRS) during cardiopulmonary resuscitation (CPR). A previous study showed that an abrupt increase of oxy-hemoglobin (Hb) level and tissue oxygenation index (TOI) was associated with the timing of return of spontaneous circulation (ROSC). However, it is not clear how TOI alters before and after CPR including a period of cardiac arrest (CA). Read More

View Article and Full-Text PDF

Addition of Drag-Reducing Polymers to Colloid Resuscitation Fluid Enhances Cerebral Microcirculation and Tissue Oxygenation After Traumatic Brain Injury Complicated by Hemorrhagic Shock.

Adv Exp Med Biol 2021 ;1269:283-288

Department of Neurosurgery, University of New Mexico, Albuquerque, NM, USA.

Hemorrhagic shock (HS) is a severe complication of traumatic brain injury (TBI) that doubles mortality due to severely compromised microvascular cerebral blood flow (mvCBF) and oxygen delivery reduction, as a result of hypotension. Volume expansion with resuscitation fluids (RF) for HS does not improve microvascular CBF (mvCBF); moreover, it aggravates brain edema. We showed that the addition of drag-reducing polymers (DRP) to crystalloid RF (lactated Ringer's) significantly improves mvCBF, oxygen supply, and neuronal survival in rats suffering TBI+HS. Read More

View Article and Full-Text PDF

Altered Behavioral Performance in the Neuron-Specific HIF-1- and HIF-2-Deficient Mice Following Chronic Hypoxic Exposure.

Adv Exp Med Biol 2021 ;1269:271-276

Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, USA.

Hypoxia-inducible factors (HIFs) are transcriptional regulators that mediate in mice for HIF-1 and HIF-2. The objective of this study was to investigate the effect of neuronal deletion of HIF-1 and HIF-2 in hypoxic adaptation by using the neuron-specific knockout (KO) mice. The floxed control and KO mice were used. Read More

View Article and Full-Text PDF

Mechanisms of Sound-Induced Opening of the Blood-Brain Barrier.

Adv Exp Med Biol 2021 ;1269:197-202

Saratov State University, Saratov, Russia.

The blood-brain barrier (BBB) poses a significant challenge for drug delivery to the brain. The limitations of our knowledge about the nature of BBB explain the slow progress in the therapy of brain diseases and absence of methods for drug delivery to the brain in clinical practice. Here, we show that the BBB opens for high-molecular-weight compounds after exposure to loud sound (100 dB 370 Hz) in rats. Read More

View Article and Full-Text PDF

Transcranial Photobiomodulation of Clearance of Beta-Amyloid from the Mouse Brain: Effects on the Meningeal Lymphatic Drainage and Blood Oxygen Saturation of the Brain.

Adv Exp Med Biol 2021 ;1269:57-61

Saratov State University, Saratov, Russia.

Here, we demonstrate the therapeutic effects of transcranial photobiomodulation (tPBM, 1267 nm, 32 J/cm, a 9-day course) in mice with the injected model of Alzheimer's disease (AD) associated with accumulation of beta-amyloid (Aβ) in the brain resulting in neurocognitive deficit vs. the control group (CG) (the neurological severity score (NNS), AD 3.67 ± 0. Read More

View Article and Full-Text PDF

Systems Biology Model of Cerebral Oxygen Delivery and Metabolism During Therapeutic Hypothermia: Application to the Piglet Model.

Adv Exp Med Biol 2021 ;1269:31-38

Department of Medical Physics and Biomedical Engineering, University College London, London, UK.

Hypoxic ischaemic encephalopathy (HIE) is a significant cause of death and disability. Therapeutic hypothermia (TH) is the only available standard of treatment, but 45-55% of cases still result in death or neurodevelopmental disability following TH. This work has focussed on developing a new brain tissue physiology and biochemistry systems biology model that includes temperature effects, as well as a Bayesian framework for analysis of model parameter estimation. Read More

View Article and Full-Text PDF

Environmental Enrichment Improved Cognitive Performance in Mice under Normoxia and Hypoxia.

Adv Exp Med Biol 2021 ;1269:329-333

Department of Physiology & Biophysics, Case Western Reserve University, Cleveland, OH, USA.

The mammalian brain modulates its microvascular network to accommodate tissue energy demand in a process referred to as angioplasticity. There is an aging effect on cognitive function and adaptive responses to hypoxia. Hypoxia-induced angiogenesis is delayed in the aging mouse brain. Read More

View Article and Full-Text PDF

Effect of 3-Day and 21-Day Hypoxic Preconditioning on Recovery Following Cerebral Ischemia in Rats.

Adv Exp Med Biol 2021 ;1269:317-322

Departments of Physiology & Biophysics, Case Western Reserve University, Cleveland, OH, USA.

We have previously reported that in a rat model of chronic hypoxia, HIF-1α and its target genes have significantly accumulated by 3 days of exposure, whereas no significant increase in capillary density has occurred; there is a significant increase in capillary density at 21 days of chronic hypoxic exposure. In this study we hypothesize that by utilizing 3 days and 21 days of hypoxic preconditioning, we would distinguish between the relative neuroprotective contributions of the accumulation of HIF-1α and its target genes and angiogenic adaptation in a rat middle cerebral artery occlusion (MCAO) model. Rats were randomly assigned to either hypoxic precondition groups (3-day and 21-day hypoxia) or normoxic control group. Read More

View Article and Full-Text PDF

Evaluation of the Quality of Chest Compression with Oxyhemoglobin Level by Near-Infrared Spectroscopy in a Rat Asphyxia Cardiac Arrest Model.

Adv Exp Med Biol 2021 ;1269:265-269

Feinstein Institute for Medical Research, Northwell Health System, Manhasset, NY, USA.

The real-time evaluation of chest compression during cardiopulmonary resuscitation is important to increase the chances of survival from a cardiac arrest (CA). In addition, cerebral oxygen level measured by near-infrared spectroscopy (NIRS) plays an important role as an indicator of return of spontaneous circulation. Recently, we developed a new method to improve the quality of chest compression using a thoracic pump in conjunction with the classic cardiac pump in a rat asphyxia CA model. Read More

View Article and Full-Text PDF

Multimodal Measurements of Brain Tissue Metabolism and Perfusion in a Neonatal Model of Hypoxic-Ischaemic Injury.

Adv Exp Med Biol 2021 ;1269:203-208

Biomedical Optics Research Laboratory, University College London, London, UK.

This is the first multimodal study of cerebral tissue metabolism and perfusion post-hypoxic-ischaemic (HI) brain injury using broadband near-infrared spectroscopy (bNIRS), diffuse correlation spectroscopy (DCS), positron emission tomography (PET) and magnetic resonance spectroscopy (MRS). In seven piglet preclinical models of neonatal HI, we measured cerebral tissue saturation (StO), cerebral blood flow (CBF), cerebral oxygen metabolism (CMRO), changes in the mitochondrial oxidation state of cytochrome c oxidase (oxCCO), cerebral glucose metabolism (CMRglc) and tissue biochemistry (Lac+Thr/tNAA). At baseline, the parameters measured in the piglets that experience HI (not controls) were 64 ± 6% StO, 35 ± 11 ml/100 g/min CBF and 2. Read More

View Article and Full-Text PDF

Functional Impact of Acidosis-Regulated MicroRNAs on the Migration and Adhesion of Tumor Cells.

Adv Exp Med Biol 2021 ;1269:151-155

Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Halle (Saale), Germany.

Tumor tissue shows special features in metabolism in contrast to healthy tissue. Besides a distinctive oxygen deficiency, tumors often show a reduced extracellular pH (acidosis) resulting from an intensified glycolysis not only under hypoxic but also under normoxic conditions (Warburg effect). As shown in previous studies, cell migration is increased in AT1 prostate carcinoma cells after incubation at pH 6. Read More

View Article and Full-Text PDF

Lycopene prevents DEHP-induced hepatic oxidative stress damage by crosstalk between AHR-Nrf2 pathway.

Environ Pollut 2021 Apr 7;285:117080. Epub 2021 Apr 7.

College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, PR China. Electronic address:

Di (2-ethylhexyl) phthalate (DEHP) is a widespread plasticizer that persists in the environment and can significantly contribute to serious health hazards of liver especially oxidative stress injury. Lycopene (LYC) as a carotenoid has recently gained widespread attention because of antioxidant activity. However, the potential mechanism of DEHP-induced hepatotoxicity and antagonism effect of LYC on it are still unclear. Read More

View Article and Full-Text PDF

Cytotoxicity and anti-inflammatory effect of a novel diminazene aceturate derivative in bovine mammary epithelial cells.

Res Vet Sci 2021 Apr 22;137:102-110. Epub 2021 Apr 22.

Key Laboratory of the Ministry of Education for the Conservation and Utilization of Special Biological Resources of Western China, Ningxia University, Yinchuan, Ningxia 750021, China. Electronic address:

Diminazene aceturate (DA) has been used in the treatment of infections of trypanosomes in animals. Interestingly, its anti-inflammatory effect has recently gained increased interests. However, DA has been reported to have toxic side effects that limit its application. Read More

View Article and Full-Text PDF

Ophiocordyceps lanpingensis polysaccharides alleviate chronic kidney disease through MAPK/NF-κB pathway.

J Ethnopharmacol 2021 May 5:114189. Epub 2021 May 5.

Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China; Key Laboratory of Sustainable Utilization of Panax Notoginseng Resources of Yunnan Province, Kunming 650500, China. Electronic address:

Ethnopharmacological Relevance: Ophiocordyceps lanpingensis (O. lanpingensis) is a traditional ethno-medicine distributed in Eastern Himalayas, which has been used by local minorities to prevent and treat urinary diseases for hundreds of years. However, the corresponding active components and related pharmacological mechanism of such medication are not clear yet. Read More

View Article and Full-Text PDF

Energy management and mitochondrial dynamics in cerebral cortex during endotoxemia.

Arch Biochem Biophys 2021 May 6;705:108900. Epub 2021 May 6.

Universidad de Buenos Aires, CONICET, Instituto de Bioquímica y Medicina Molecular (IBIMOL), Facultad de Farmacia y Bioquímica, Junín 946, C1113AAD, CABA, Argentina; Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Química Analítica y Fisicoquímica, Cátedra de Fisicoquímica, Junín 946, C1113AAD, CABA, Argentina. Electronic address:

Mitochondria play an essential role in inflammatory processes such as sepsis or endotoxemia, contributing to organ-cellular redox metabolism, emerging as the energy hub of the cell, and as an important center of action of second messengers. In this work, we aimed to elucidate the energy state, redox balance, and mitochondrial remodeling status in cerebral cortex in an experimental model of endotoxemia. Female Sprague-Dawley rats were subjected to a single dose of LPS (ip 8 mg kg body weight) for 6 h. Read More

View Article and Full-Text PDF

Environmental oxygen regulates astrocyte proliferation to guide angiogenesis during retinal development.

Development 2021 May 7;148(9). Epub 2021 May 7.

Department of Neurobiology, Duke University School of Medicine, Durham, NC 27710, USA.

Angiogenesis in the developing mammalian retina requires patterning cues from astrocytes. Developmental disorders of retinal vasculature, such as retinopathy of prematurity (ROP), involve arrest or mispatterning of angiogenesis. Whether these vascular pathologies involve astrocyte dysfunction remains untested. Read More

View Article and Full-Text PDF

Evolutionary and functional analyses demonstrate conserved ferroptosis protection by Arabidopsis GPXs in mammalian cells.

FASEB J 2021 Jun;35(6):e21550

Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China.

Species have evolved unique mechanisms to combat the effects of oxidative stress inside cells. A particularly devastating consequence of an unhindered oxidation of membrane lipids in the presence of iron results in cell death, known as ferroptosis. Hallmarks of ferroptosis, including peroxidation of polyunsaturated fatty acids, are conserved among animals and plants, however, early divergence of an ancestral mammalian GPX4 (mGPX4) has complicated our understanding of mechanistic similarities between species. Read More

View Article and Full-Text PDF

Clinical Randomized Comparison of Medetomidine and Xylazine for Isoflurane Balanced Anesthesia in Horses.

Front Vet Sci 2021 20;8:603695. Epub 2021 Apr 20.

Section Anesthesiology, Department of Clinical Diagnostics and Services, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.

To assess drug plasma levels, preanesthetic sedation, cardiopulmonary effects during anesthesia and recovery in horses anesthetized with isoflurane combined with medetomidine or xylazine. Prospective blinded randomized clinical study. Sixty horses undergoing elective surgery. Read More

View Article and Full-Text PDF

No detectable effect on visual responses using functional MRI in a rodent model of α-synuclein expression.

eNeuro 2021 May 6. Epub 2021 May 6.

Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital - Amager and Hvidovre, Copenhagen, Denmark.

Parkinson's disease (PD) is a progressive neurodegenerative disease that is typically diagnosed late in its progression. There is a need for biomarkers suitable for monitoring the disease progression at earlier stages to guide the development of novel neuroprotective therapies. One potential biomarker, α-synuclein, has been found in both the familial cases of PD, as well as the sporadic cases and is considered a key feature of PD. Read More

View Article and Full-Text PDF

The effects of secondary iron overload and iron chelation on a radiation-induced acute myeloid leukemia mouse model.

BMC Cancer 2021 May 6;21(1):509. Epub 2021 May 6.

Biological Sciences, Sunnybrook Research Institute Sunnybrook Health Sciences Centre, Toronto, ON, Canada.

Background: Patients with myelodysplastic syndrome (MDS) require chronic red blood cell (RBC) transfusion due to anemia. Multiple RBC transfusions cause secondary iron overload and subsequent excessive generation of reactive oxygen species (ROS), which leads to mutations, cell death, organ failure, and inferior disease outcomes. We hypothesize that iron loading promotes AML development by increasing oxidative stress and disrupting important signaling pathways in the bone marrow cells (BMCs). Read More

View Article and Full-Text PDF

Metabolic engineering of Bacillus subtilis for enhancing riboflavin production by alleviating dissolved oxygen limitation.

Bioresour Technol 2021 Apr 29;333:125228. Epub 2021 Apr 29.

Key Laboratory of Industrial Biotechnology of the Ministry of Education, Laboratory of Applied Microorganisms and Metabolic Engineering, School of Biotechnology, Jiangnan University, Wuxi 214122, China. Electronic address:

Riboflavin, an essential vitamin for animals, is used widely in the pharmaceutical industry and as a food and feed additive. The microbial synthesis of riboflavin requires a large amount of oxygen, which limits the industrial-scale production of the vitamin. In this study, a metabolic engineering strategy based on transcriptome analysis was identified as effective in increasing riboflavin production. Read More

View Article and Full-Text PDF

Protective and therapeutic effects of ethanolic extract of (watercress) and vitamin E against bleomycin-induced pulmonary fibrosis in rats.

Res Pharm Sci 2021 Feb 30;16(1):94-102. Epub 2020 Dec 30.

Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, I.R. Iran.

Background And Purpose: Pulmonary fibrosis is a chronic disease of the lungs caused by inflammation, species of reactive oxygen, and immune defects. Antioxidant properties of has been reported in some studies. Therefore, the objective of the current study was to evaluate the effect of ethanolic extract of (EENO) on bleomycin (BLM)-induced lung fibrosis in rats. Read More

View Article and Full-Text PDF
February 2021

[The roles of gap junctional intercellular communication in non-alcoholic steatohepatitis (NASH) and liver fibrosis].

Authors:
Aya Naiki-Ito

Nihon Yakurigaku Zasshi 2021 ;156(3):152-156

Department of Experimental Pathology and Tumor Biology, Nagoya City University Graduate School of Medical Sciences.

Non-alcoholic steatohepatitis (NASH) is a common risk factor for fibrosis, cirrhosis, and a predisposing factor for the development of hepatocellular carcinoma. Recently, incidence of NASH has increased due to an increase in metabolic syndrome. Connexin (Cx)32, a hepatocyte gap-junction protein, plays an important role in liver tissue homeostasis; Cx32 dominant-negative transgenic rat (Cx32ΔTg) has much decreased gap-junctional intercellular communication, and high susceptibility to carcinogens. Read More

View Article and Full-Text PDF

Triple sulfur-oxygen-strontium isotopes probabilistic geographic assignment of archaeological remains using a novel sulfur isoscape of western Europe.

PLoS One 2021 5;16(5):e0250383. Epub 2021 May 5.

CNRS, CAGT, UMR 5288, Université Paul Sabatier, Toulouse, France.

Sulfur isotope composition of organic tissues is a commonly used tool for gathering information about provenance and diet in archaeology and paleoecology. However, the lack of maps predicting sulfur isotope variations on the landscape limits the possibility to use this isotopic system in quantitative geographic assignments. We compiled a database of 2,680 sulfur isotope analyses in the collagen of archaeological human and animal teeth from 221 individual locations across Western Europe. Read More

View Article and Full-Text PDF