Prior exposure to ciprofloxacin disrupts intestinal homeostasis and predisposes ayu(Plecoglossus altivelis)to subsequent Pseudomonas plecoglossicida-induced infection  

作　　者：Xiang-Yu Wu Jin-Bo Xiong Chen-Jie Fei Ting Dai Ting-Fang Zhu Zi-Yue Zhao Jing Pan Li Nie Jiong Chen 

机构地区：[1]State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Ningbo University,Ningbo,Zhejiang 315211,China [2]Laboratory of Biochemistry and Molecular Biology,School of Marine Sciences,Meishan Campus,Ningbo University,Ningbo,Zhejiang 315211,China [3]Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture,School of Marine Sciences,Ningbo University,Ningbo,Zhejiang 315211,China

出　　处：《Zoological Research》2022年第4期648-665,共18页动物学研究（英文）

基　　金：supported by the Key Research and Development Project of Zhejiang Province(2021C02062);National Natural Science Foundation of China(32173004,31972821);Natural Science Foundation of Zhejiang Province(LZ18C190001);Natural Science Foundation of Ningbo City(202003N4011);Research Project of State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products(2010DS700124-ZZ2008)。

摘　　要：With the rapid development of intensive farming,the aquaculture industry uses a great many antibiotics for the prevention and treatment of bacterial diseases.Despite their therapeutic functions,the overuse and accumulation of antibiotics also pose a threat to aquaculture organisms.In the present study,ayu(Plecoglossus altivelis)was used as a fish model to study the impacts of ciprofloxacin(CIP)overuse on intestinal homeostasis and immune response during subsequent Pseudomonas plecoglossicida infection.Based on 16S rRNA gene amplification and Illumina sequencing,we found that CIP pre-exposure caused significant variation in intestinal microbiota,including increased species richness,altered microbiota composition and interaction networks,and increased metabolic dysfunction.Furthermore,immunohistochemical analysis indicated that CIP pre-exposure resulted in severe mucosal layer damage,goblet cell reduction,and epithelial cell necrosis of the intestinal barrier in infected ayu.Quantitative real-time polymerase chain reaction(qRT-PCR)showed that disruption of intestinal homeostasis impaired systemic antiinfection immune responses in the intestine,gill,spleen,and head kidney,while inhibiting IL-1β,TNF-α,and IL-10 expression and promoting TGF-βexpression.Our findings indicated that CIP administration can directly affect intestinal microbiota composition and intestinal integrity in ayu fish.This perturbation of intestinal homeostasis is likely responsible for the lower survival rate of hosts following subsequent infection as the capacity to mount an effective immune response is compromised.This study also provides preliminary clues for understanding the effects of antibiotic overuse on higher vertebrates through trophic transfer.

关 键 词：CIPROFLOXACIN MICROBIOTA Intestinal barrier Immune responses AYU 

分 类 号：S943[农业科学—水产养殖]