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Punicalin Ameliorates Cell Pyroptosis Induced by LPS/ATP Through Suppression of ROS/NLRP3 Pathway

Authors Shen R, Yin P, Yao H, Chen L, Chang X, Li H, Hou X

Received 30 December 2020

Accepted for publication 16 February 2021

Published 5 March 2021 Volume 2021:14 Pages 711—718


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Professor Ning Quan

Ruiting Shen,1,* Peng Yin,2,* Hua Yao,1,* Lu Chen,1 Xinyu Chang,1 Huanrong Li,1 Xiaolin Hou1

1Department of Veterinary Medicine, Beijing University of Agriculture, Beijing, 102206, People’s Republic of China; 2Institute of Microbiology Chinese Academy of Sciences, Beijing, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Xiaolin Hou Tel +86 10-80799397
Email [email protected]
Huanrong Li Email [email protected]

Purpose: Inflammation is the driving force of many inflammatory and autoimmune diseases, Pyroptosis is a process of cell death in response to excessive inflammation. Punicalin has been reported to have anti-inflammatory effects. However, the anti-pyroptosis is unknown. Hence, this study was aimed to research the inhibition of MG on LPS/ATP-induced pyroptosis in vitro.
Methods: Lipopolysaccharide (LPS)/ATP were used to simulate mouse J774A.1 cells to mimic the inflammatory response and the role of punicalin was examined. The secretion of proinflammatory cytokines was analyzed using enzyme-linked immunosorbent assay (ELISA). The expression of nucleotide-binding oligomerization domain-like receptor containing pyrin domain 3 (NLRP3), apoptosis-associated speck-like protein containing a caspase activation and recruitment domain (ASC), caspase-1, and GSDMD-N in LPS/ATP-stimulated cells were examined by Western blot. N-acetylcysteine (NAC) was used to validate the role of Punicalin.
Results: Punicalin significantly blocked the production of endogenous ROS, reduced LPS/ATP-induced activation of NLRP3, caspase 1, ASC and GSDMD-N, IL-1b and IL-18 protein levels. Furthermore, N-acetylcysteine (NAC), an ROS scavenger, inhibited the LPS/ATP-stimulated activation of NLRP3 inflammasome mediated inflammation and pyroptosis.
Conclusion: Punicalin ameliorates LPS/ATP-induced pyroptosis in J774A.1 macrophages, the mechanism may involve downregulation of the ROS/NLRP3 inflammasome signaling pathway.

Keywords: punicalin, NLRP3, pyroptosis, ROS

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