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Ozone oxidative preconditioning reduces nitrite levels in blood serum in LPS: induced endotoxic shock in mice

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Abstract

Objective and design

Reactive oxygen species, and also reactive species of nitrogen such as nitric oxide, play an important role in the pathogenesis of peritonitis and septic shock. Ozone oxidative preconditioning (OOP) has shown protective effects in various experimental models of peritonitis in rats and endotoxic shock in mice. Currently, strong evidence is available that this protective effect of OOP is due to its action on the balance between endogenous antioxidants and pro-oxidants, which is favorable for anti-oxidant defense. The aim of this research was to elucidate whether or not OOP is able to reduce nitrite levels in blood serum of mice treated with lipopolysaccharide (LPS). We used an experimental model of endotoxic shock induced by LPS in mice in which the animals were pre-treated with ozone/oxygen mixture for 5 days (once daily), with injection of LPS 24 h thereafter to induce endotoxic shock.

Results

Mice pretreated with OOP showed a significant decrease in nitrite levels with all three doses tested [0.2 mg/kg (50.91%), 0.4 mg/kg (47.3%) and 1.2 mg/kg (34.6%)].

Conclusions

Ozone oxidative preconditioning significantly reduced nitrite levels in blood serum of mice with endotoxic shock induced by LPS. We propose that OOP merits further testing in studies as a potential alternative treatment to reduce nitrite levels in patients with sepsis syndrome and septic shock.

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Authors and Affiliations

  1. Department of Biomedicine, Ozone Research Center (National Center for Scientific Research), P.O. Box 6414, Havana, Cuba

    Ricardo González Alvarez, Zullyt Barbara Zamora, Aluet Borrego & Yaima Alonso

  2. Department of Biomedicine, Center for Pharmaceutical Chemistry, Havana, Cuba

    René Delgado

  3. Veterinary Services and Laboratory Animal Medicine, Philipps-University of Marburg, Marburg, Germany

    Siegfried Schulz

  4. Laboratory of Biological Assays, Department of Biomedical Research, Ozone Research Center, P. O. Box 6414, Havana, Cuba

    Ricardo González Alvarez

Authors
  1. Ricardo González Alvarez
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  2. Zullyt Barbara Zamora
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  3. Aluet Borrego
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  4. René Delgado
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  5. Siegfried Schulz
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  6. Yaima Alonso
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Corresponding author

Correspondence to Zullyt Barbara Zamora.

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Responsible Editor: A. Bauhofer.

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Alvarez, R.G., Zamora, Z.B., Borrego, A. et al. Ozone oxidative preconditioning reduces nitrite levels in blood serum in LPS: induced endotoxic shock in mice. Inflamm. Res. 58, 441–443 (2009). https://doi.org/10.1007/s00011-009-0055-1

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  • DOI: https://doi.org/10.1007/s00011-009-0055-1

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