Abstract
Objective
We report the effects of the gastrin-releasing peptide (GRP) receptor antagonist RC-3095 in an acute inflammation model induced by carrageenan.
Methods
Male Wistar rats received saline or saline containing 2% λ-carrageenan into the pleural cavity, with some also receiving RC-3095 3 mg/kg subcutaneously, immediately after surgery. Four hours later, the rats were killed and pleural exudate was obtained for evaluation of total cell count, lactate dehydrogenase activity, total protein, cytokines analysis and nitrite/nitrate concentrations; myeloperoxidase (MPO) activity and oxidative stress were evaluated in the lung.
Results
RC-3095 exhibited pronounced anti-inflammatory actions by inhibition of leukocyte influx and blockade of MPO, nitrite/nitrate and cytokine levels. Moreover, the results showed that RC-3095 elicits action against oxidative damage in lipids and proteins, as well as increasing cell viability.
Conclusion
The present findings suggest that GRP plays a role in acute inflammation that can be related with the reduction of oxidative damage and that it could be effective in therapeutic applications.
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Acknowledgments
This work was supported by grants from Universidade do Extremo Sul Catarinense (UNESC), Coordenação de Aperfeiçoamento de Nível Superior (CAPES) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq).
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Petronilho, F., de Souza, B., Vuolo, F. et al. Protective effect of gastrin-releasing peptide receptor antagonist in carrageenan-induced pleural inflammation in rats. Inflamm. Res. 59, 783–789 (2010). https://doi.org/10.1007/s00011-010-0190-8
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DOI: https://doi.org/10.1007/s00011-010-0190-8