期刊
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
卷 105, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dci.2019.103582
关键词
Litopenaeus vannamei; Laccase; Oxidative stress; NF-E2-related factor 2
资金
- National Natural Science Foundation of China [31472301]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2015A030306030]
- Special Support Program of Science and Technology Innovation of Young Talents [2015TQ01N220]
Laccases (Lacs) are copper-containing oxidase enzymes that are found in various plants, fungi, and microorganisms. For invertebrates, particularly insects and crustaceans, Lacs have been shown to be involved in immune responses. In shrimp, a Lac gene has been cloned and functionally characterized, which revealed that it is involved in shrimp anti-pathogen infection. In the present study, a novel Lac gene (LvLac2) was cloned from Litopenaeus vannamei. Real-time RT-PCR analysis showed that LvLac2 is induced by white spot syndrome virus (WSSV)- or Vibrio alginolyticus infection. In addition, the downregulated expression of LvLac2 decreased the cumulative mortality of WSSV- or V. alginolyticus infected shrimps. Moreover, LvLac2 is also induced by oxidative stress. Knocking down the expression of LvLac2 decreased the severity of hepatopancreatic injury caused by oxidative stress, as well as reduced the cumulative shrimp mortality during oxidative stress. Furthermore, gene reporter assays showed that the expression of LvLac2 is regulated by NF-E2-related factor 2, which is the key transcription factor of the oxidative stress response signaling pathway. Our study revealed that LvLac2 not only participates in immune responses against infections in L. vannamei but is also involved in oxidative stress responses.
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