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Aeromonas hydrophila suppresses complement pathways via degradation of complement C3 in bony fish by metalloprotease
Chen, Dan-Dan1,2; Li, Ji-Hong1,4; Yao, Yuan-Yuan1,4; Zhang, Yong-An1,3
2019-11-01
Source PublicationFISH & SHELLFISH IMMUNOLOGY
ISSN1050-4648
Volume94Issue:1Pages:739-745
Abstract

Aeromonas hydrophila is a pathogen that causes high mortality in the grass carp. The complement system, as a frontline defence of innate immunity, plays an important role in the immune response against pathogens. However, the immunity evasion mechanism of A. hydrophila against the complement system of grass carp remains unclear. In this study, we described an additional mechanism used by A. hydrophila GD18 to evade the complement system and survive in grass carp serum. First, A. hydrophila evaded the bactericidal activity of grass carp serum. Second, the haemolytic activity assays showed that A. hydrophila obviously suppressed the alternative pathway, which depended on preventing the formation or disabling the function of the membrane-attack complex (MAC). Further research indicated that A. hydrophila targeted complement C3, the central component of the three complement pathways, and degraded it in the grass carp serum, leading to the inhibition of the complement pathways, which resulted in the serum-resistance of A. hydrophila. Furthermore, cleavage analyses showed that extracellular proteases (ECPases) of A. hydrophila efficiently cleaved purified C3 as well as C3 in grass carp serum. Finally, protease inhibitor studies and mass spectrum analysis identified the secreted metalloprotease elastase (AhE), which was present in large amounts in crude ECPases, as the central molecule responsible for C3 cleavage. Compared to wild strain GD18, the AhE knockout, tahe was dramatically reduced in the ability of serum resistance. Our findings suggested that A. hydrophila escaped serum-killing by suppressing the complement pathways via the degradation of complement C3 in bony fish, which was related to secreted metalloproteases.

KeywordAeromonas hydrophila C3 degradation Complement evasion Metalloprotease Bony fish
DOI10.1016/j.fsi.2019.09.057
Funding OrganizationScience Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China
Indexed BySCI
Language英语
Funding ProjectScience Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China[2018CFA011]
WOS Research AreaFisheries ; Immunology ; Marine & Freshwater Biology ; Veterinary Sciences
WOS SubjectFisheries ; Immunology ; Marine & Freshwater Biology ; Veterinary Sciences
WOS IDWOS:000496892400078
WOS KeywordINNATE IMMUNITY ; TELEOST FISH ; EVASION ; SERUM ; EVOLUTION ; PROTEASE ; SYSTEM ; PATHOGENICITY ; COMPONENTS ; RESISTANCE
PublisherACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Funding OrganizationScience Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China ; Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei Province of China
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/34869
Collection淡水生态学研究中心_期刊论文
Corresponding AuthorZhang, Yong-An
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Hubei, Peoples R China
2.Minist Agr, Key Lab Aquaculture Dis Control, Wuhan, Hubei, Peoples R China
3.Huazhong Agr Univ, Coll Fisheries, State Key Lab Agr Microbiol, Wuhan, Hubei, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Chen, Dan-Dan,Li, Ji-Hong,Yao, Yuan-Yuan,et al. Aeromonas hydrophila suppresses complement pathways via degradation of complement C3 in bony fish by metalloprotease[J]. FISH & SHELLFISH IMMUNOLOGY,2019,94(1):739-745.
APA Chen, Dan-Dan,Li, Ji-Hong,Yao, Yuan-Yuan,&Zhang, Yong-An.(2019).Aeromonas hydrophila suppresses complement pathways via degradation of complement C3 in bony fish by metalloprotease.FISH & SHELLFISH IMMUNOLOGY,94(1),739-745.
MLA Chen, Dan-Dan,et al."Aeromonas hydrophila suppresses complement pathways via degradation of complement C3 in bony fish by metalloprotease".FISH & SHELLFISH IMMUNOLOGY 94.1(2019):739-745.
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