Innate inflammatory response to acute inhalation exposure of riot control agent oleoresin capsicum in female rats: An interplay between neutrophil mobilization and inflammatory markers.

Experimental Lung Research
Pompy PatowaryPronobesh Chattopadhyay

Abstract

Aim: The use of oleoresin capsicum (OC) sprays, due to their irreversible health effects has now grown into a matter of heated debate. In the present study, the early phase pulmonary events involving chemotactic and inflammatory mediators after short-exposure duration to OC have been presented.Materials and methods: Female Wistar rats used in the evaluation of respiratory parameters at 1 h, 3 h, and 24 h post-exposure, were sacrificed for the evaluation of blood cell counts, BALF cytokine estimation, lung capillary leakage, study of oxidative stress and histopathology of the lungs.Results: Results confirmed a dose-dependent effect of OC exposure on serum clinical chemistry and hematological parameters. Subsequent upregulation of IL-l and TNF-α indicated lung's responses to acute oxidant-induced injury and inflammation after OC exposure. Significant alterations in the pulmonary levels of reactive oxygen intermediates were seen following the inhalation of OC. Infiltration of polymorphonuclear leukocytes, mostly neutrophils, into the site of infection was evident in the cytocentrifuged samples of BALF. Histological samples of rat lung sections revealed the recruitment of inflammatory cells in the airways and around blood vessels i...Continue Reading

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