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2019 ; 42
(4
): 585-595
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Comparative transcriptome analysis reveals the role of p53 signalling pathway
during red-spotted grouper nervous necrosis virus infection in Lateolabrax
japonicus brain cells
#MMPMID30659619
Xiang Y
; Jia P
; Liu W
; Yi M
; Jia K
J Fish Dis
2019[Apr]; 42
(4
): 585-595
PMID30659619
show ga
Nervous necrosis virus (NNV) is one of the fish pathogens that have caused mass
mortalities of many marine and freshwater fishes in the world. To better
comprehend the molecular immune mechanism of sea perch (Lateolabrax japonicus)
against NNV infection, the comparative transcriptome analysis of red-spotted
grouper nervous necrosis virus (RGNNV)-infected or mock-infected L. japonicus
brain (LJB) cells was performed via RNA sequencing technology. Here, 1,969
up-regulated genes and 9,858 down-regulated genes, which were widely implicated
in immune response pathways, were identified. Furthermore, we confirmed that p53
signalling pathway was repressed at 48 hr post-RGNNV infection, as indicated by
up-regulation of Mdm2 and down-regulation of p53 and its downstream target genes,
including Bax, Casp8 and CytC. Overexpression of L. japonicus p53 (Ljp53)
significantly inhibited RGNNV replication and up-regulated the expression of
apoptosis-related genes, whereas the down-regulation caused by pifithrin-? led to
the opposite effect, suggesting Ljp53 might promote cell apoptosis to repress
virus replication. Luciferase assay indicated that Ljp53 could enhance the
promoter activities of zebrafish interferon (IFN)1, indicating that Ljp53 could
exert its anti-RGNNV activities by enforcing the type I IFN response. This study
revealed the potential antiviral role of p53 during NNV infection.