Two myeloid differentiation factor 88 (MyD88) isoforms identified in ducks

文献类型： 外文期刊

第一作者： Cheng, Yuqiang

作者： Cheng, Yuqiang;Wang, Hengan;Yan, Yaxian;Sun, Jianhe;Ding, Chan

作者机构：

关键词： Duck;Innate immunity;MyD88;NF-kappa B;IL-6;Newcastle disease virus

期刊名称：DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY （ 影响因子：3.636； 五年影响因子：3.654 ）

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收录情况： SCI

摘要： MyD88 is an adaptor protein involved in the interleukin-1 receptor-induced and Toll-like receptor (TLR)-induced activation of nuclear factor-kappa B (NF-kappa B). In this study, we identified two isoforms of MyD88 gene, designated DuMyD88-X1 and DuMyD88-X2, from duck cells. Both variants were determined to have a death domain at the N-terminal and a Toll/IL-1R (TIR) domain at the C-terminal: however, the TIR domain of DuMyD88-X2 was incomplete and was 81 amino acids shorter than DuMyD88-X1. Quantitative real-time reverse transcription PCR revealed broad expression of both MyD88s. During Newcastle disease virus (NDV) challenge experiments, expression of the two genes increased significantly, with DuMyD88-X1 having a larger amplitude and longer duration. Overexpression of DuMyD88-X1 and DuMyD88-X2 induced the activation of NF-kappa B and IL-6 in vitro, suggesting that DuMyD88-X1 and DuMyD88-X2 may be important in the innate immune response. The results verify the existence of a MyD88-dependent signaling pathway in ducks and contribute to understanding the potential role of MyD88s in the innate immune response. (C) 2015 Elsevier Ltd. All rights reserved.

分类号： R392

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