Plasma levels of oxidative stress biomarkers and hospital mortality in severe head injury: A multivariate analysis

ObjectivesTo assess whether plasma biomarkers of oxidative stress predict diffusion-perfusion mismatch in patients with acute ischemic stroke (AIS).MethodsWe measured plasma levels of oxidative stress biomarkers such as F2-isoprostanes (F2-isoPs), total and perchloric acid Oxygen Radical Absorbance Capacity (ORACTOT and ORACPCA), urinary levels of 8-oxo-7,8-dihydro-2′-deoxyguoanosine, and inflammatory and tissue-damage biomarkers (high-sensitivity C-reactive protein, matrix metalloproteinase-2 and -9) in a prospective study of patients with AIS presenting within 9 hours of symptom onset. Diffusion-weighted (DWI) and perfusion-weighted (PWI) MRI sequences were analyzed with a semiautomated volumetric method. Mismatch was defined as baseline mean transit time volume minus DWI volume. A percent mismatch cutoff of >20% was considered clinically significant. A stricter definition of mismatch was also used. Mismatch salvage was the region free of overlap by final infarction.ResultsMismatch >20% was present in 153 of 216 (70.8%) patients (mean [±SD] age 69.2 ± 14.3 years, 41.2% women). Patients with mismatch >20% were more likely to have higher baseline plasma levels of ORACPCA (p = 0.020) and F2-isoPs (p = 0.145). Multivariate binary logistic regression demonstrated that lnF2-isoP (odds ratio [OR] 2.44, 95% confidence interval [CI] 1.19–4.98, p = 0.014) and lnORACPCA (OR 4.18, 95% CI 1.41–12.41, p = 0.010) were independent predictors of >20% PWI-DWI mismatch and the stricter mismatch definition, respectively. lnORACTOT significantly predicted mismatch salvage volume (>20% mismatch p = 0.010, stricter mismatch definition p = 0.003).ConclusionsElevated hyperacute plasma levels of F2-isoP and ORAC are associated with radiographic evidence of mismatch and mismatch salvage in patients with AIS. If validated, these findings may add to our understanding of the role of oxidative stress in cerebral tissue fate during acute ischemia.

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OXIDATIVE STRESS BIOMARKERS IN EXPIRATED AIR OF HEALTHY HUMANS AND PROMISING TECHNIQUES OF THEIR ANALYSIS DURING SPACE FLIGHT

Aerospace and Environmental Medicine ◽

10.21687/0233-528x-2020-54-3-5-21 ◽

2020 ◽

pp. 5-21

Author(s):

L.N. Mukhamedieva ◽

◽

D.S. Tsarkov ◽

D.S. Ozerov ◽

G.Yu. Grigoriev ◽

...

Keyword(s):

Oxidative Stress ◽

Space Flight ◽

Oxidative Stress Biomarkers ◽

Stress Biomarkers ◽

Healthy Humans

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Association between Vitamin D Status, Oxidative Stress Biomarkers and Viral Load in Human Immunodeficiency Virus Type 1 Infection

Current HIV Research ◽

10.2174/1570162x15666171005170227 ◽

2017 ◽

Vol 15 (5) ◽

Cited By ~ 4

Author(s):

Tamires Flauzino ◽

Andrea N.C. Simao ◽

Elaine R.D. de Almeida ◽

Helena K. Morimoto ◽

Sayonara R. Oliveira ◽

...

Keyword(s):

Oxidative Stress ◽

Vitamin D ◽

Human Immunodeficiency Virus ◽

Viral Load ◽

Human Immunodeficiency Virus Type ◽

Vitamin D Status ◽

Oxidative Stress Biomarkers ◽

Stress Biomarkers ◽

Immunodeficiency Virus

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Oxidative Stress Biomarkers in Urine of Metal Carpentry Workers Can Be Diagnostic for Occupational Exposure to Low Level of Welding Fumes from Associated Metals

Cancers ◽

10.3390/cancers13133167 ◽

2021 ◽

Vol 13 (13) ◽

pp. 3167

Author(s):

Flavia Buonaurio ◽

Maria Luisa Astolfi ◽

Daniela Pigini ◽

Giovanna Tranfo ◽

Silvia Canepari ◽

...

Keyword(s):

Oxidative Stress ◽

Occupational Exposure ◽

Oxidation Products ◽

Control Group ◽

Welding Fumes ◽

Oxidative Stress Biomarkers ◽

Limit Values ◽

Stress Biomarkers ◽

Specificity And Sensitivity ◽

The Impact

Urinary concentrations of 16 different exposure biomarkers to metals were determined at the beginning and at the end of a working shift on a group of workers in the metal carpentry industry. Five different oxidative stress biomarkers were also measured, such as the oxidation products of RNA and DNA metabolized and excreted in the urine. The results of workers exposed to metals were compared to those of a control group. The metal concentrations found in these workers were well below the occupational exposure limit values and exceeded the mean concentrations of the same metals in the urine of the control group by a factor of four at maximum. Barium (Ba), mercury (Hg), lead (Pb) and strontium (Sr) were correlated with the RNA oxidative stress biomarker, 8-oxo-7, 8-dihydroguanosine (8-oxoGuo), which was found able to discriminate exposed workers from controls with a high level of specificity and sensitivity. The power of this early diagnostic technique was assessed by means of the ROC curve. Ba, rubidium (Rb), Sr, tellurium (Te), and vanadium (V) were correlated with the level of the protein oxidation biomarker 3-Nitrotyrosine (3-NO2Tyr), and Ba, beryllium (Be), copper (Cu), and Rb with 5-methylcytidine (5-MeCyt), an epigenetic marker of RNA damage. These effect biomarkers can help in identifying those workers that can be defined as “occupationally exposed” even at low exposure levels, and they can provide information about the impact that such doses have on their health.

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Antioxidants, lysosomes and elements status during the life cycle of sea trout Salmo trutta m. trutta L.

Scientific Reports ◽

10.1038/s41598-021-85127-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Natalia Kurhaluk ◽

Halyna Tkachenko

Keyword(s):

Oxidative Stress ◽

Lipid Peroxidation ◽

Muscle Tissue ◽

Salmo Trutta ◽

Protein Carbonyl ◽

Oxidative Modification ◽

Oxidative Stress Biomarkers ◽

Development Stages ◽

Stress Biomarkers ◽

Element Contents

AbstractThe aim of our study was to elucidate the effects of both development stages (parr, smolt, adult, spawner), and kelt as a survival form and sex (male, female) on the functional stability of the lysosomal complex, biomarkers of oxidative stress, and element contents in the muscle tissue of the sea trout (Salmo trutta m. trutta L.) sampled in the Pomerania region (northern Poland). We have evaluated the maximal activities of lysosomal enzymes (alanyl aminopeptidase, leucyl aminopeptidase, β-N-acetylglucosaminidase, and acid phosphatase), lipid peroxidation level, and protein carbonyl derivatives as indices of muscle tissue degradation. The relationship between lysosomal activity and oxidative stress biomarkers estimated by the lipid peroxidation level and protein carbonyl derivatives was also assessed, as well as the relationships between element levels and oxidative stress biomarkers. Trends of the main effects (i.e., the development stages and sex alone, the interaction of the sex and development stage simultaneously) on oxidative stress biomarkers, lysosomal functioning, and element contents in the muscle tissue were evaluated. The study has shown sex-related relationships between the pro- and antioxidant balance and the tissue type in the adult stage as well as modifications in the lysosomal functioning induced by long-term environmental stress associated with changing the habitats from freshwater to seawater and intense migrations. The highest level of toxic products generated in oxidative reactions and oxidative modification of proteins was noted in both the spawner stage and the kelt form. The holistic model of analysis of all parameters of antioxidant defense in all development stages and sex demonstrated the following dependencies for the level of lipid peroxidation, oxidative modification of proteins, lysosomal activities, and element contents: TBARS > OMP KD > OMP AD > TAC, AcP > NAG > LAP > AAP and Cu > Fe > Ca > Mn > Zn > Mg, respectively.

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