Antiviral activity of luteolin against porcine epidemic diarrhea virus in silico and in vitro
文献类型： 外文期刊
作者： Wang, Jieru 1 ; Zeng, Xiaoyu 1 ; Gou, Jiaojiao 1 ; Zhu, Xiaojie 2 ; Yin, Dongdong 1 ; Yin, Lei 1 ; Shen, Xuehuai 1 ; Dai, Yin 1 ; Pan, Xiaocheng 1 ;
作者机构： 1.Anhui Acad Agr Sci, Inst Anim Husb & Vet Sci, Livestock & Poultry Epidem Dis Res Ctr Anhui Prov, Key Lab Pig Mol Quantitat Genet Anhui Acad Agr Sci, Hefei 230031, Anhui, Peoples R China
2.China Inst Vet Drug Control, Beijing 100000, Peoples R China
关键词： PEDV; Luteolin; Porcine ACE2; Spike; Mpro; Pro-inflammatory cytokine; Drug resistant mutant
期刊名称：BMC VETERINARY RESEARCH （ 影响因子：2.3； 五年影响因子：2.6 ）
ISSN：
年卷期： 2024 年 20 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundPorcine epidemic diarrhea virus (PEDV) mainly causes acute and severe porcine epidemic diarrhea (PED), and is highly fatal in neonatal piglets. No reliable therapeutics against the infection exist, which poses a major global health issue for piglets. Luteolin is a flavonoid with anti-viral activity toward several viruses.ResultsWe evaluated anti-viral effects of luteolin in PEDV-infected Vero and IPEC-J2 cells, and identified IC50 values of 23.87 mu M and 68.5 mu M, respectively. And found PEDV internalization, replication and release were significantly reduced upon luteolin treatment. As luteolin could bind to human ACE2 and SARS-CoV-2 main protease (Mpro) to contribute viral entry, we first identified that luteolin shares the same core binding site on pACE2 with PEDV-S by molecular docking and exhibited positive pACE2 binding with an affinity constant of 71.6 mu M at dose-dependent increases by surface plasmon resonance (SPR) assay. However, pACE2 was incapable of binding to PEDV-S1. Therefore, luteolin inhibited PEDV internalization independent of PEDV-S binding to pACE2. Moreover, luteolin was firmly embedded in the groove of active pocket of Mpro in a three-dimensional docking model, and fluorescence resonance energy transfer (FRET) assays confirmed that luteolin inhibited PEDV Mpro activity. In addition, we also observed PEDV-induced pro-inflammatory cytokine inhibition and Nrf2-induced HO-1 expression. Finally, a drug resistant mutant was isolated after 10 cell culture passages concomitant with increasing luteolin concentrations, with reduced PEDV susceptibility to luteolin identified at passage 10.ConclusionsOur results push forward that anti-PEDV mechanisms and resistant-PEDV properties for luteolin, which may be used to combat PED.
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