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Discovery of Nitro-azolo1,5-apyrimidines with Anti-Inflammatory and Protective Activity against LPS-Induced Acute Lung Injury
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Discovery of Nitro-azolo1,5-apyrimidines with Anti-Inflammatory and Protective Activity against LPS-Induced Acute Lung Injury
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Journal Article
Discovery of Nitro-azolo1,5-apyrimidines with Anti-Inflammatory and Protective Activity against LPS-Induced Acute Lung Injury
2022
Overview
Acute lung injury remains a challenging clinical condition, necessitating the development of novel, safe and efficient treatments. The prevention of macrophage M1-polarization is a viable venue to tackle excessive inflammation. We performed a phenotypic screening campaign to identify azolopyrimidine compounds that effectively inhibit LPS-induced NO synthesis and interleukin 6 (IL-6) secretion. We identified lead compound 9g that inhibits IL-6 secretion with IC50 of 3.72 µM without apparent cytotoxicity and with minimal suppression of macrophage phagocytosis in contrast to dexamethasone. In a mouse model of LPS-induced acute lung injury, 30 mg/kg i.p. 9g ameliorated anxiety-like behavior, inhibited IL-6 release, and limited neutrophil infiltration and pulmonary edema. A histological study confirmed the protective activity of 9g. Treatment with compound 9g prevented the migration of CD68+ macrophages and the incidence of hemorrhage. Hence, we have identified a promising pharmacological approach for the treatment of acute lung injury that may hold promise for the development of novel drugs against cytokine-mediated complications of bacterial and viral infections.
Publisher
MDPI AG,MDPI
Subject
