AI Article Synopsis
- Ozone oxidative preconditioning enhances the antioxidant balance in cells, protecting against oxidative stress by increasing the body’s internal antioxidant systems.
- The study aimed to evaluate how this preconditioning affects TNF-alpha levels in mice after exposure to lipopolysaccharide (LPS), a substance that can induce inflammation.
- Results showed that ozone treatment significantly reduced TNF-alpha levels in a dose-dependent manner, indicating that this preconditioning technique may inhibit the production of inflammatory markers following LPS administration.
Article Abstract
Ozone oxidative preconditioning is a prophylactic approach, which favors the antioxidant-prooxidant balance for preservation of the cell redox state by increasing antioxidant endogenous systems in both in vivo and in vitro experimental models. The aim of this study was to analyze the effect of ozone oxidative preconditioning on the level of tumor necrosis factor-alpha (TNF-alpha) in the serum of mice treated with lipopolysaccaride (LPS). Pretreatment with an ozone/oxygen gaseous mixture was administered intraperitoneally (0.2, 0.4 and 1.2 mg/kg) or by rectal application (0.2 and 0.4 mg/kg) once daily during five days before LPS (0.1 mg/kg, intraperitoneal). TNF-alpha was measured by cytotoxicity on L-929 cells. One hour after LPS injection, a significant mean increase of TNF-alpha in mouse serum was observed. Ozone/oxygen gaseous mixture reduced serum TNF-alpha levels in a dose-dependent manner. Statistically significant decreases in TNF-alpha levels after LPS injection were observed either with ozone intraperitoneal applications at 0.2 (78 %), 0.4 (98.5 %) and 1.2 (98.6 %) mg/ kg or by rectal application at 0.2 (46.2 %) and 0.4 (97.4 %) mg/kg. These results indicate that ozone oxidative preconditioning inhibits TNF-alpha production.
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| http://dx.doi.org/10.1055/s-0031-1297047 | DOI Listing |
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Article Synopsis
- Norfloxacin was ozonized in clay suspensions to study its toxicity on Lemna minor, which helps assess antibiotic impact in environments with clay.
- The study found that norfloxacin causes toxicity in Lemna minor through oxidative stress, worsened by ozonation, affecting growth and chlorophyll levels.
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