title: Differential autophagic effects triggered by five different vertebrate iridoviruses in a common, highly permissive mandarinfish fry (MFF-1) cell model.
abstract: Autophagy of five vertebrate iridoviruses, including one megalocytivirus (infectious spleen and kidney necrosis virus, ISKNV) and four ranaviruses (Chinese giant salamander iridovirus, CGSIV; Tiger frog virus, TFV; Grouper iridovirus, GIV; and Largemouth bass virus, LMBV) were investigated in a common, highly permissive mandarinfish fry (MFF-1) cell model. The results showed marked autophagosome formation in GIV- and LMBV-infected cells but not in ISKNV-, CGSIV- and TFV-infected MFF-1 cells. Strong evidence for the autophagosomes was provided by transmission electron microscopy, the detection of mandarinfish microtubule-associated protein 1 light chain 3B (mLC3)-based fluorescent dot formation and mLC3-I/mLC3-II conversion was provided by Western blotting. Pharmacological tests indicated that autophagy plays an antiviral role during GIV or LMBV infection. Collectively, our data are the first to show that antiviral autophagic effects can be triggered by GIV and LMBV but not by ISKNV, TFV and CGSIV in a common susceptible cell model. These results suggest that differential host-virus interaction strategies may be utilized against different vertebrate iridoviruses; they also indicate the potential effectiveness of an antiviral treatment that modulates autophagy to control iridoviral infections, such as GIV and LMBV.
authors.affiliation: State Key Laboratory for Bio-control, MOE Key Laboratory of Aquatic Food Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China.
authors.forename: Hemei
authors.initials: H
authors.lastname: Qi
authors.affiliation: State Key Laboratory for Bio-control, MOE Key Laboratory of Aquatic Food Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yi
authors.affiliation: State Key Laboratory for Bio-control, MOE Key Laboratory of Aquatic Food Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou 510275, PR China.
authors.forename: Shaoping
authors.initials: S
authors.lastname: Weng
authors.affiliation: State Key Laboratory for Bio-control, MOE Key Laboratory of Aquatic Food Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China.
authors.forename: Weibing
authors.initials: W
authors.lastname: Zou
authors.affiliation: State Key Laboratory for Bio-control, MOE Key Laboratory of Aquatic Food Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, 135 Xingang Road West, Guangzhou 510275, PR China. Electronic address: lsshjg@mail.sysu.edu.cn.
authors.forename: Jianguo
authors.initials: J
authors.lastname: He
authors.affiliation: State Key Laboratory for Bio-control, MOE Key Laboratory of Aquatic Food Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China; Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou 510275, PR China; Bairong Aquatic Breeding Products Co., Ltd, Xiaan, Danzhao Town, Nanhai District, Foshan 528000, PR China. Electronic address: dongchfu@mail.sysu.edu.cn.
authors.forename: Chuanfu
authors.initials: C
authors.lastname: Dong
mesh_terms: D000818:Animals; D001343:Autophagy; D002460:Cell Line; D004266:DNA Virus Infections / Q000276:immunology / Q000662:veterinary* / Q000821:virology; D005393:Fish Diseases / Q000276:immunology* / Q000821:virology; D017994:Iridovirus / Q000276:immunology*; D010473:Perciformes
keywords: Antiviral response; Autophagy; Chinese giant salamander iridovirus (CGSIV); Grouper iridovirus (GIV); Infectious spleen and kidney necrosis virus (ISKNV); Largemouth bass virus (LMBV); Tiger frog virus (TFV); Vertebrate iridovirus