Taurine promotes Oreochromis niloticus survival against Edwardsiella tarda infection.

Taurine promotes Oreochromis niloticus survival against Edwardsiella tarda infection.
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牛磺酸促进尼罗罗非鱼抵抗迟缓爱德华氏菌感染的存活。

DOI:
10.1016/j.fsi.2022.08.065
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发表时间:
2022-08
期刊:
Elsevier
影响因子:
--
通讯作者:
Bo Peng
Bo Peng
中科院分区:
其他
文献类型:
--
作者:
Liaotian Peng;Dongqi Li;Dai-xiao Yang;Bo Peng

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迟缓爱德华氏菌是最重要的病原体之一,可感染包括水生动物和人类在内的多种宿主。在水产养殖中,迟缓爱德华氏菌感染的爆发屡有报道,造成了巨大的经济损失。由于抗生素耐药性的广泛存在,可用于治疗细菌感染的抗生素十分有限。因此,提高水生动物在迟缓爱德华氏菌感染下的存活率成为一个紧迫问题。在本研究中,我们剖析了感染迟缓爱德华氏菌后濒死和存活罗非鱼之间的代谢组变化。濒死和存活的鱼呈现出不同的代谢反应,据此我们鉴定出一种关键代谢物——牛磺酸,其在存活组和濒死组中的含量均有所增加,但在存活组中增加得更为显著。外源添加牛磺酸可使感染迟缓爱德华氏菌的罗非鱼存活率提高37.5%。进一步的定量PCR分析表明,牛磺酸可提高肝脏、脾脏和头肾中免疫基因的表达。因此,我们的研究展示了一种增强鱼类对细菌感染免疫反应的新策略。
Edwardsiella tarda represents one of the most important pathogens that infects a variety of hosts including aquatic animals and humans. The outbreak of E. tarda infection is frequently reported in aquaculture that causes huge economic loss. Due to the widespread of antibiotic resistance, available antibiotics to treat bacterial infection are limited. Therefore, enhancing aquatic animals to survive upon E. tarda infection become an urgent issue. In this study, we profiled the metabolomic change of tilapia in-between the dying and survival fish upon E. tarda infection. The dying and survival fish mounts differential metabolic response, from which we identify a key metabolite, taurine, whose abundance is increased in both the survival group and the dying group but is more significant in the survival group. Exogenous taurine increases tilapia survival rate by 37.5% upon E. tarda infection. Further quantitative PCR analysis demonstrate taurine increases the expression of immune genes in liver, spleen and head kidney. Therefore, our study shows a new strategy to enhance fish immune response against bacterial infection.
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