Project description:Hemorrhagic disease caused by grass carp reovirus (GCRV) infection is a major problem affecting the grass carp aquaculture industry. Therefore, inhibiting the spread of GCRV infection is of great economic significance. Herein, we sequenced five tissues (gill, liver, intestine, kidney, and muscle) from grass carp before and after GCRV infection using data-independent acquisition proteomic.
Project description:Few studies reported for obtaining the grass carp resistant to hemorrhagic disease via gene editing in commercial fish. Here, we demonstrate that the expression and activity of grass carp PI4KB (gcPI4KB) are vital for GCRV-I and GCRV-II replication. Due that obvious cytopathic effect (CPE) in the present available cell lines is only caused by GCRV-I, but GCRV-II is the current popular and fatal strain in grass carp, GCRV-I and GCRV-II are used in cell lines and in grass carp, respectively. The in vitro studies in CIK cells revealed that gcPI4KB interacted with NS80 and VP3 of GCRV-I, and that gcPI4KB was recruited by NS80 for promoting the generation of GCRV VIBs. Since the negative regulatory role of gcPI4KB in GCRV infection was confirmed by in vitro data,we performed gene editing of gcPI4KB in grass carp. We found that PI4KB F0 crispants juvenile grass carp have obvious advantages in promoting growth and in resisting GCRV-II infection. Compared with uninfected WT grass carp, the uninfected PI4KB F0 crispants juvenile grass carp exhibit a higher expression level of many genes involved in growth- and development-related metabolic pathways such as the FoxO signaling pathway and insulin signaling pathway. Compared with WT grass carp without infection, PI4KB F0 crispants juvenile grass carp without infection or WT grass carp infected with GCRV-II, higher expression levels for many genes involved in metabolic diseases and viral infection were observed in the liver from PI4KB F0 crispants juvenile grass carp infected with GCRV-II. Altogether, the present study suggests the mechanism of gcPI4KB in facilitating GCRV replication, the signaling pathways regulated by gcPI4KB, and the possibility to obtain the grass carp resistant to hemorrhagic disease via gene editing of PI4KB.
Project description:Effect of High Temperature on Immune Response of Grass Carp (Ctenopharyngodon idellus) by Transcriptome Analysis To understand the immune response mechanisms of this fish in high temperature circumstance, the transcriptomic profiles of the spleens from grass carp groups undergoing heat stress and normal temperature were investigated.