期刊
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
卷 78, 期 -, 页码 52-60出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dci.2017.09.011
关键词
DAK; Negative regulation; microRNA-122; RIG-I signaling pathway
资金
- Natural Science Foundation of Zhejiang Province [LR14C040001]
- National Natural Science Foundation of China [31370049, 31672682]
MicroRNA-122 (miR-122) was originally identified in mouse and then lots of researches on miR-122 had been performed in mammals. However, the functional study of miR-122 were restricted in fish. In miiuy croaker, miR-122 is sensitive to poly(I:C) stimulation. In this study, a combination of bioinformatics and experimental techniques were used to investigate the functions of miR-122. DAK is a putative target gene of miR-122 which was predicted by bioinformatics, and further the luciferase reporter assays were used to confirm the target sites in DAK 3'untranslated region. The inhibiting effect of miR-122 mimics or pre-miR-122 on DAK presented the dose and time dependent manners, and the pre-miR-122 showed stronger inhibiting effect on DAK than the miR-122 mimics. Therefore, the miR-122 participate in regulating RIG-I-like receptors signaling pathway via inhibiting DAK which is the inhibitors of MDA5. The expression of miR-122 and DAK showed negative relationship in both miiuy croaker spleen and macrophages, which imply that miR-122 may regulate DAK at the post-transcriptional level. These results will enhance our understanding about the regulation of miRNAs on immune response in fish. (C) 2017 Elsevier Ltd. All rights reserved.
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