https://scholars.lib.ntu.edu.tw/handle/123456789/606201
標題: | A novel C-type lectin LvCTL 4.2 has antibacterial activity but facilitates WSSV infection in shrimp (L. vannamei) | 作者: | Huang Y.-H Kumar R Liu C.-H Lin S.-S Wang H.-C. SHIH-SHUN LIN |
關鍵字: | Antibacterial activity;C-type lectin;Litopenaeus vannamei;LvCTL 4.2;WSSV infection | 公開日期: | 2022 | 卷: | 126 | 來源出版物: | Developmental and Comparative Immunology | 摘要: | Glycan-binding protein C-type lectin (CTL), one of the pattern recognition receptors (PRRs), binds to carbohydrates on the surface of pathogens and elicits antimicrobial responses in shrimp innate immunity. The objective was to identify and characterize a novel C-type lectin LvCTL 4.2 in Litopenaeus vannamei. The LvCTL 4.2 protein consisted of a signal peptide at the N terminal and a carbohydrate-recognition domain (CRD) with a mutated mannose-binding (Glu-Pro-Ala; EPA) motif at the C terminal, and thereby has a putative secreted mannose-binding C-type lectin architecture. LvCTL 4.2 was highly expressed in nervous tissue and stomach. Infection with white spot syndrome virus (WSSV) induced expression of LvCTL 4.2 in shrimp stomach at 12 h post infection. Conversely, there was no obvious upregulation in expression of LvCTL 4.2 in stomach or hepatopancreas of shrimp with AHPND (acute hepatopancreas necrosis disease). Pathogen binding assays confirmed recombinant LvCTL 4.2 protein (rLvCTL 4.2) had significant binding ability with the WSSV virion, Gram-negative, and Gram-positive bacteria. Moreover, rLvCTL 4.2 had strong growth inhibition of Vibrio parahaemolyticus. Silencing LvCTL 4.2 suppressed WSSV replication, whereas pretreatment of WSSV with rLvCTL 4.2 facilitated viral replication in vivo. In conclusion, LvCTL 4.2 acted as a PRR that inhibited AHPND-causing bacteria, but facilitated WSSV pathogenesis. ? 2021 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114167684&doi=10.1016%2fj.dci.2021.104239&partnerID=40&md5=be9e955e05d0bb4db3c290d5d52cf54c https://scholars.lib.ntu.edu.tw/handle/123456789/606201 |
ISSN: | 0145305X | DOI: | 10.1016/j.dci.2021.104239 |
顯示於: | 生物科技研究所 |
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