IFN-gamma in turtle: Conservation in sequence and signalling and role in inhibiting iridovirus replication in Chinese soft-shelled turtle Pelodiscus sinensis
文献类型: 外文期刊
作者: Fu, Jian Ping 1 ; Chen, Shan Nan 1 ; Zou, Peng Fei 1 ; Huang, Bei 3 ; Guo, Zheng 1 ; Zeng, Ling Bing 4 ; Qin, Qi Wei 5 ;
作者机构: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei Province, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Jimei Univ, Coll Fisheries, Xiamen 361021, Fujian Province, Peoples R China
4.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Hubei Province, Peoples R China
5.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources &
关键词: IFN-gamma;IFN-gamma stimulated gene;Iridovirus;Antiviral activity;Turtle
期刊名称:DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY ( 影响因子:3.636; 五年影响因子:3.654 )
ISSN: 0145-305X
年卷期: 2014 年 43 卷 1 期
页码:
收录情况: SCI
摘要: The IFN-gamma gene was identified in a turtle, the Chinese soft-shelled turtle, Pelodiscus sinensis, with its genome consisting of 4 exons and 3 introns. The deduced amino acid sequence of this gene contains a signal peptide, an IFN-gamma family signature motif (130)IQRKAVNELFPT, an NLS motif (KRKR)-K-155 and three potential N-glycosylation sites. As revealed by real-time quantitative PCR, the gene was constitutively expressed in all tested organs/tissues, with higher level observed in blood, intestine and thymus. An induced expression of IFN-gamma at mRNA level was observed in peripheral blood leucocytes (PBLs) in response to in vitro stimulation of LPS and PolyI:C. The overexpression of IFN-gamma in the Chinese soft-shelled turtle artery (STA) cell line resulted in the increase in the expression of transcriptional regulators, such as IRF1, IRF7 and STAT1, and antiviral genes, such as Mx, PKR, implying possibly the existence of a conserved signalling network and role for IFN-gamma in the turtle. Furthermore, the infection of soft-shelled turtle iridovirus (STIV) in the cell line transfected with IFN-gamma may cause the cell death as demonstrated with the elevated lactate dehydrogenase (LDH) level and cell mortality. However, the mechanism involved in the antiviral activity may require further investigation. (C) 2013 Elsevier Ltd. All rights reserved.
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