Tropical Journal of Pharmaceutical Research

Original Research Article | OPEN ACCESS

Protective effects of 4, 5-O-dicaffeoylquinic acid against mouse sepsis via down-regulation of TNF-α, IL-6 and IL-8

XiaoBo Wang , JianHua Wu, BuKao Ni, Li Lin

Department of Critical Care Medicine, WenZhou Central Hospital, WenZhou, Zhejiang 325000, PR China;

For correspondence:- XiaoBo Wang Email: wangxb_12345@163.com Tel:+8657788053025

Accepted: 26 January 2020 Published: 29 April 2020

Citation: Wang X, Wu J, Ni B, Lin L. Protective effects of 4, 5-O-dicaffeoylquinic acid against mouse sepsis via down-regulation of TNF-α, IL-6 and IL-8. Trop J Pharm Res 2020; 19(4):715-720 doi: 10.4314/tjpr.v19i4.6

© 2020 The authors.
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Abstract

Purpose: To investigate the protective effects of 4, 5-O-dicaffeoylquinic acid (DCQA) isolated from Xanthium sibiricum Patr. against mouse sepsis caused by cecal ligation/puncture (CLP) in vivo, as well as the molecular mechanisms of action involved.

Methods: DCQA (7.5, 15, and 30 mg/kg/day) were administered to the mice with sepsis and the survival rate was obtained. Tumor necrosis factor (TNF)-α and interleukin (IL)-6 were examined by enzyme-linked immunosorbent assay (ELISA). Subsequently, the lipopolysaccharide (LPS) neutralizing ability of DCQA (2, 4, and 8 μg/mL) was measured using limulus amebocyte lysate (LAL) test in vitro. Furthermore, the effect of DCQA (10, 20, and 40 μg/mL) on mRNA expression of TNF-α, IL-6, and IL-8 in LPS (100 ng/mL)-treated RAW 264.7 cells was assessed using quantitative real time-polymerase chain reaction (RT-qPCR) assay.

Results: DCQA significantly improved the survival rate of mice with sepsis caused by CLP (35, 50, and 65 %, respectively vs. 15 % for control, p < 0.05). LPS levels fell on co-incubation with DCQA in vitro. Moreover, ELISA and RT-qPCR results revealed that DCQA treatment lowered tendency in the mRNA expression of TNF-α, IL-6, and IL-8 (p < 0.01).

Conclusion: DCQA exhibits protective effects against sepsis in mice mediated by downregulating TNF-α, IL-6, and IL-8. Further studies, in animals and humans are requied to determine the safety and efficacy of DCQA in both animal and clinical management of sepsis.

Keywords: Xanthium sibiricum, 4,5-O-Dicaffeoylquinic acid, Sepsis, Cecal ligation and puncture, Lipopolysaccharide, TNF-α, IL-6, IL-8