Dynamic changes of neutrophils against Vibrio parahaemolyticus in zebrafish larvae
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S941.4

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Scientific Research Foundation for Returned Scholars of the Ministry of Education of China

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    Abstract:

    Vibrio parahaemolyticus is a zoonotic pathogen that poses a serious threat to animal, fish and human health. In order to study the dynamic process of host neutrophils and bacteria infection, we established a model of local infection of the 48 hours post fertilization (hpf) zebrafish larvae otic vesicle infected with the V. parahaemolyticus strain labelled with red florescent protein (Vp57RFP) in this study, and the Escherichia coli Ec01 strain was used as a control to systematically compare the median lethal dose (LD50) and survival curves, infection process and dynamic process of interaction with neutrophils of V.parahaemolyticus and E. coli, respectively. RT-qPCR verified the expression levels of the inflammation-related genes il1b and il10. The results showed that the LD50 of E. coli and V.parahaemolyticus infected zebrafish larvae were 1.14×1011 CFU/mL and 7.90×107 CFU/mL, respectively. Compared to E. coli, V. parahaemolyticus recruited faster and more numerous neutrophils during dynamic infection imaging, and induced more il1b and il10 genes expression level that caused strong inflammatory response in zebra fish larvae at the same time point. Based on the above research, we successfully established the model of V.parahaemolyticus-otic vesicle zebrafish larvae infection, which provides a basis for further study of the dynamic process of neutrophil clearance of Vibrio parahaemolyticus infection and the in-depth revealing of the innate immune response mechanism.

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郭欣娅,季策,谢子健,季帆,祖尧,任建峰,张庆华.斑马鱼幼鱼嗜中性粒细胞对副溶血弧菌清除的动态变化[J].上海海洋大学学报,2020,29(2):180-188.
GUO Xinya, JI Ce, XIE Zijian, JI Fan, ZU Yao, REN Jianfeng, ZHANG Qinghua. Dynamic changes of neutrophils against Vibrio parahaemolyticus in zebrafish larvae[J]. Journal of Shanghai Ocean University,2020,29(2):180-188.

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History
  • Received:May 14,2019
  • Revised:September 18,2019
  • Adopted:September 25,2019
  • Online: April 14,2020
  • Published:
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