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1,335 results for “oxidative stress”
Data accompanying "Oxidative stress changes interactions between two bacterial species from competitive to facilitative"
<p>Raw data used to generate all figures in the associated manuscript.</p>
Yasir- Coding of publications on Alzheimer's and Oxidative Stress
<div>This project is the first of its kind and can provide a workflow and an approach to study the basis of other pathogenic mechanisms. We explore what experimental evidence is at the basis of the theory that oxidative stress is associated with the pathogenesis of Alzheimer's. </div>
Supplementary material 1 from: Marinovska PG, Todorova TI, Boyadzhiev KP, Pisareva EI, Tomova AA, Parvanova PN, Dimitrova M, Chankova SG, Petrova VY (2022) Cellular susceptibility and oxidative stress response to menadione of logarithmic, quiescent, and nonquiescent Saccharomyces cerevisiae cell populations. In: Chankova S, Peneva V, Metcheva R, Beltcheva M, Vassilev K, Radeva G, Danova K (Eds) Current trends of ecology. BioRisk 17: 127-138. https://doi.org/10.3897/biorisk.17.77320
Figure S1
Raw data for research paper entitled "Effects of Acute Toluene Exposure on Oxidative Stress Parameters and Endothelial Markers in the Coronary Artery of Wistar Rats"
Open the record for dataset details and reuse information.
Fig. 2 in Oxidative stress parameters in juvenile Brazilian flounder Paralichthys orbignyanus (Valenciennes, 1839) (Pleuronectiformes: Paralichthyidae) exposed to cold and heat shocks
Fig. 2. (TBARS), (GST) and (CAT) activity in the gills of Paralichthys orbignyanus juveniles exposed to different temperatures (17.1, 23.0 and 28.8ºC) as a function of time exposition (72 h). Values are expressed as means ± SEM, N=5. aLower case letters indicate significantly different at the different temperatures and same time (P <0.05), determined by two-way ANOVA and by Dunnet test. ACapital letters indicate significantly different at the same temperatures and different times (P <0.05), determined by two-way ANOVA and by Dunnet test.
Figure 2 in Evaluation of nickel-induced brain injuries in rats via oxidative stress and apoptosis: attenuating effects of hyperoside
Figure 2. Effect of Hyp on brain antioxidant profile in rat: A) superoxide dismutase (SOD), B) glutathione peroxidase (GPx), C) catalase (CAT), and D) thiobarbituric acid reactive substances (TBARS). Data are presented as mean ± SEM (n = 7). a Significant differences between other groups studied and control (a1 P <0.05, a3 P <0.001, a4 P <0.0001). b Significant differences between other groups studied and Hyp group (b1 P <0.05, b2 P <0.01, b3 P <0.001, b4 P <0.0001). c Significant differences between other groups studied and Ni + Hyp group (c2 P <0.01, c3 P <0.001, c4 P <0.0001) by Tukey's multiple range tests.
Figure 6 in Evaluation of nickel-induced brain injuries in rats via oxidative stress and apoptosis: attenuating effects of hyperoside
Figure 6. (A) Neurons of brain tissue of control group (arrows). (B) Mild positive signs in neurons of Hyp-treated group (arrows). (C) Severe positive signs in neurons of Ni-treated group (arrows). (D) Mild positive signs in neurons of Ni + Hyptreated group (arrows) (IF, 20 µm).
Figure 4 in Short-time salinity fluctuations are strong activators of oxidative stress in Mediterranean mussel (Mytilus galloprovincialis)
Figure 4. Short-time salinity fluctuations modulate DNA damage in hemocytes of mussels. Mussels were acclimated to high (24-40 ‰, HS) and low (6-14‰, LS) environmental salinity. DNA damages in hemocytes were evaluated based on Comet assay. Bars indicate mean±SE. Results were considered significant when p<0.05 by Mann-Whitney test (n=10).
Fig. 4 in Oxidative stress biomarkers in the African sharptooth catfish, Clarias gariepinus, associated with infections by adult digeneans and water quality
Fig. 4. Monthly variation of stress biomarkers measured in the liver of Clarias gariepinus and body condition. A– Total protein (TP); B– Catalase (CAT); C– Glutathione reduced (GSH); D– Lipid peroxidation (LPX); E– Superoxide dismutase (SOD); F– body condition (KN). NC – no collection was performed; BD - below detection.
Fig. 3 in Oxidative stress biomarkers in the African sharptooth catfish, Clarias gariepinus, associated with infections by adult digeneans and water quality
Fig. 3. Monthly variation of prevalence (%), mean intensity and mean abundance. A– Masenia nkomatiensis; B– Glossidium pedatum. NC – no collection was performed.
Table 1 in Exogenous application of polyamines alleviates water stress-induced oxidative stress of Rosa damascena Miller var. trigintipetala Dieck
<p><b>Table 1</b> Effects of foliar application of spermine (Spm) and spermidine (Spd) on growth characters of <i>Rosa damascena</i> Miller var. <i>trigintipetala</i> Dieck plant grown under water stress (50% FC) or non-stress (100%FC) conditions.</p><table><tbody><tr><th>Treatments</th><th>Plant height (cm)</th><th>Plant FW (g)</th><th>Plant DW (g)</th></tr></tbody><tbody><tr><th>100% FC</th><td>Control</td><td>47.10 ± 0.85b</td><td>37.80 ± 0.72b</td><td>12.68 ± 0.45b</td></tr><tr><td>0.5 mM Spm</td><td>50.78 ± 0.38a</td><td>45.77 ± 1.66a</td><td>17.82 ± 0.64a</td></tr><tr><td>0.5 mM Spd</td><td>51.21 ± 1.07a</td><td>44.71 ± 0.50a</td><td>16.59 ± 0.52a</td></tr><tr><th>50% FC</th><td>Control</td><td>35.75 ± 0.66d</td><td>28.73 ± 0.64e</td><td>10.35 ± 0.59d</td></tr><tr><td>0.5 mM Spm</td><td>45.45 ± 0.78b</td><td>35.45 ± 1.72c</td><td>12.78 ± 0.27b</td></tr><tr><td>0.5 mM Spd</td><td>43.78 ± 0.70c</td><td>33.67 ± 2.08d</td><td>12.38 ± 0.15b</td></tr></tbody></table><p>Values are means ± S.D. (<i>n =</i> 8). Means within a column with different letters are significantly different from each other according to Duncan multiple range test at <i>P =</i> 0.05.</p>
Is there an oxidative cost of acute stress? Characterization, implication of glucocorticoids, and modulation by prior stress experience
<p>Acute rises in glucocorticoid hormones allow individuals to adaptively respond to environmental challenges but may also have negative consequences, including oxidative stress. While the effects of chronic glucocorticoid exposure on oxidative stress have been well characterized, those of acute stress or glucocorticoid exposure have mostly been overlooked. We examined the relationship between acute stress exposure, glucocorticoids, and oxidative stress in Japanese quail (Coturnix japonica). We (i) characterized the pattern of oxidative stress during an acute stressor in two phenotypically distinct breeds, (ii) determined whether corticosterone ingestion, in the absence of acute stress, increased oxidative stress, which we call Glucocorticoid-induced Oxidative Stress (GiOS), and (iii) explored how prior experience to stressful events affected GiOS. Both breeds exhibited an increase in oxidative stress in response to an acute stressor. Importantly, in the absence of acute stress, ingesting corticosterone caused an acute rise in plasma corticosterone and oxidative stress. Lastly, birds exposed to no previous acute stress or numerous stressful events had high levels of GiOS in response to acute stress, while birds with moderate prior exposure did not. Together, these findings suggest that an acute stress response results in GiOS, but prior experience to stressors may modulate that oxidative cost.</p>
Data from: Reproduction and maternal care increases oxidative stress in a mouthbrooding cichlid fish
Investment in reproduction and post-zygotic parental care is an energetically costly, yet fundamental aspect of the life history strategies in many species. Recently, oxidative stress has received attention as a potential mediator in the trade-off between reproduction, growth and survival. During activities that increase metabolic activity, such as providing offspring care, an overproduction of reactive oxygen species can occur that cannot be counteracted by antioxidants, leading to oxidative stress and tissue damage. Here, we investigated the oxidative costs of reproduction and maternal care over the course of the reproductive cycle in a mouthbrooding cichlid fish within socially stable and unstable environments. We manipulated social stability by disrupting the habitat in socially unstable tanks. We expected to see an increase in the burden of maternal care within unstable environments due to increased male harassment of females as a byproduct of increased male-male aggression. We found that brooding females have higher levels of oxidative stress than non-brooding females and oxidative stress fluctuates throughout the reproductive cycle. These fluctuations were driven by a spike in reactive oxygen metabolites at the beginning of brood care followed by an increase in antioxidant defense. Surprisingly, the link between reproduction and oxidative stress was not different between females from stable or unstable environments. Our study illustrates a more complete picture of the physiological costs of reproduction and parental care throughout different stages of care rather than a simplistic end-point observation of how reproduction and parental care affect an individual.
Figure 2 from: Kokanova-Nedialkova Z, Aluani D, Tzankova V, Nedialkov P (2021) Simultaneous quantification of the major flavonoids from wild spinach by UHPLC-HRMS and their neuroprotective effects in a model of H2O2-induced oxidative stress on SH-SY5Y cells. Pharmacia 68(3): 657-664. https://doi.org/10.3897/pharmacia.68.e71030
Figure 2 Effect of flavonoids and silibinin on the viability of neuroblastoma SH-SY5Y cells. Data are presented as means from three independent experiments ± SD (n = 8). *P < 0.05, ***P < 0.001, vs. untreated control (one-way analysis of variance with Dunnet's post hoc test).
Figure 3 from: Kokanova-Nedialkova Z, Aluani D, Tzankova V, Nedialkov P (2021) Simultaneous quantification of the major flavonoids from wild spinach by UHPLC-HRMS and their neuroprotective effects in a model of H2O2-induced oxidative stress on SH-SY5Y cells. Pharmacia 68(3): 657-664. https://doi.org/10.3897/pharmacia.68.e71030
Figure 3 Effect of flavonoids and silibinin on the viability of SH-SY5Y cells in a model of H2O2-induced toxicity. Data are presented as means from three independent experiments ± SD (n = 8). ***P < 0.001, vs. untreated control; +++P < 0.001, vs. H2O2 group. (one-way analysis of variance with Dunnet's post hoc test).
Figure 1 from: Althanoon ZA, Mahmood IH (2021) Effect of lisinopril therapy on serum leptin, oxidative stress and C-reactive protein in hypertensive patients. Pharmacia 68(3): 705-711. https://doi.org/10.3897/pharmacia.68.e73140
Figure 1 The difference in mean of measured parameters (MDA, hsCRP, TAC, and GSH) among the study sampled groups.
Exercise and biomakers of oxidative stress skeletal muscle
<p>Dataset - muscle skeletal oxidative stress biomakers</p>
Fig. 3 in Verniciflavanol A, a profisetinidin-type-4-arylflavan-3-ol from toxicodendron vernicifluum protects SH-SY5Y cells against H2O2-Induced oxidative stress
Fig. 3. Experimental ECD spectra of compound 9.
Fig. 2 in Verniciflavanol A, a profisetinidin-type-4-arylflavan-3-ol from toxicodendron vernicifluum protects SH-SY5Y cells against H2O2-Induced oxidative stress
Fig. 2. Key HMBC correlations of compounds 1–11.
Fig. 1 in Verniciflavanol A, a profisetinidin-type-4-arylflavan-3-ol from toxicodendron vernicifluum protects SH-SY5Y cells against H2O2-Induced oxidative stress
Fig. 1. The structures of compounds 1–19.
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