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Article Publish Status: FREE
Abstract Title:

Inhibitory Effect of Piceatannol onInfection Bothand.

Abstract Source:

Front Microbiol. 2020 ;11:593588. Epub 2020 Nov 27. PMID: 33329477

Abstract Author(s):

Guizhen Wang, Yawen Gao, Xiuhua Wu, Xiue Gao, Min Zhang, Hongmei Liu, Tianqi Fang

Article Affiliation:

Guizhen Wang

Abstract:

Suilysin (SLY) plays a critical role ininfections making it an ideal target to the combat infection caused by this pathogen. In the present study, we found that piceatannol (PN), a natural compound, inhibits pore-formation by blocking the oligomerization of SLY without affecting the growth ofand the expression of SLY. Furthermore, PN alleviated the J774 cell damage and the expression of the inflammatory cytokine tumor necrosis factor-α (TNF-α) and interleukin-1α (IL-1β) induced by. The computational biology and biochemistry results indicated that PN binds to the joint region of D2 and D4 in SLY, and Asn57, Pro58, Pro59, Glu76, Ile379, Glu380, and Glu418 were critical residues involved in the binding. The binding effect between PN and SLY hindered the SLY monomers from forming the oligomers, thereby weakening the hemolytic activity of SLY. This mechanism was also verified by hemolysis analysis and analysis offormation after site-specific mutagenesis. Furthermore, PN protected mice frominfections by reducing bacterial colony formation and the inflammatory response in target organs. These results indicate that PN is a feasible drug candidate to combatinfections.

Study Type : Animal Study, In Vitro Study

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