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Experimental Lung Research 2020-Mar

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

Rakstu tulkošanu var veikt tikai reģistrēti lietotāji
Ielogoties Reģistrēties
Saite tiek saglabāta starpliktuvē
Pompy Patowary
Manash Pathak
Kamaruz Zaman
Sanjai Dwivedi
Pronobesh Chattopadhyay

Atslēgvārdi

Abstrakts

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 in the subepithelium of conducting airways.Conclusion: Results of the present study demonstrated that, exposure to OC spray may mitigate inflammatory response and development of acute lung injury in rats. However, it can be concluded that although OC spray causes pulmonary hazards in the aforementioned concentrations, it can be used as a non-lethal riot control agent in minimal concentration. Understanding the in-depth mechanism of action in the molecular and receptor level will help in developing effective antagonist against OC.

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