Effect of EGCG Extracted from Green Tea against Largemouth Bass Virus Infection

被引：23

作者：

Cheng, Yuan ^{[1
]}

Liu, Mingzhu ^{[1
]}

Yu, Qing ^{[1
,2
]}

Huang, Shuaishuai ^{[1
]}

Han, Shuyu ^{[3
]}

Shi, Jingu ^{[4
]}

Wei, Hongling ^{[1
]}

Zou, Jianwei ^{[4
]}

Li, Pengfei ^{[1
,2
]}

机构：

[1] Guangxi Acad Sci, Guangxi Engn Res Ctr Fishery Major Dis Control & E, Guangxi Key Lab Aquat Biotechnol & Modern Ecol Aqu, Nanning 530000, Peoples R China

[2] China ASEAN Modern Fishery Ind Technol Transfer De, Nanning 530000, Peoples R China

[3] Guangxi Fisheries Technol Extens Stn, Nanning 530000, Peoples R China

[4] Beihai Fisheries Technol Extens Stn, Beihai 536001, Peoples R China

来源：

VIRUSES-BASEL | 2023年 / 15卷 / 01期

基金：

中国国家自然科学基金;

关键词：

antiviral activity; antiviral mechanism; aptamer; EGCG; largemouth bass virus; HEPATITIS-B-VIRUS; EPIGALLOCATECHIN GALLATE; GROUPER IRIDOVIRUS; DNA VACCINE; HOST-CELLS; IN-VITRO; ENTRY; POLYPHENOL; CYTOSKELETON; REPLICATION;

D O I：

10.3390/v15010151

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

(1) Background: Largemouth bass virus (LMBV) is a major viral pathogen in largemouth bass (Micropterus salmoides) aquaculture that often causes high mortality and heavy economic losses, thus developing treatments to combat this pathogen is of great commercial importance. Green tea is a well-known medicinal plant that contains active ingredients with antiviral, antibacterial, and other biological activities. The goals of this study were to explore the effect and mechanism of green tea source compounds on LMBV and provide data to serve as the basis for the screening of targeted drugs in the future. In this study, we evaluated the effects of the main component of green tea, epigallocatechin-3-gallate (EGCG), against LMBV infection. (2) Methods: The safe working concentration of EGCG was identified by cell viability detection and light microscopy. The antiviral activity and mechanism of action of EGCG against LMBV infection were evaluated with light microscopy, an aptamer 6-carboxy-fluorescein-based fluorescent molecular probe, and reverse transcription quantitative PCR. (3) Results: The safe working concentration of EGCG was <= 10 mu g/mL. EGCG showed significant anti-LMBV infection activity in a concentration-dependent manner, and it also destroyed the structure of virus particles. EGCG impacted the binding of virus particles to cell receptors and virus invasion into the host cells. Inhibitory effects of EGCG on LMBV particles, LMBV binding to the host-cell membrane, and LMBV invasion were 84.89%, 98.99%, and 95.23%, respectively. Meanwhile, the effects of EGCG subsequently were verified in vivo. The fatality rate of the LMBV + EGCG group was significantly lower than that of the LMBV group. (4) Conclusions: Our results suggest that EGCG has effective antiviral properties against LMBV and may be a candidate for the effective treatment and control of LMBV infections in largemouth bass aquaculture.

引用

页数：14