Inability of rat DPP4 to allow MERS-CoV infection revealed by using a VSV pseudotype bearing truncated MERS-CoV spike protein.

Inability of rat DPP4 to allow MERS-CoV infection revealed by using a VSV pseudotype bearing truncated MERS-CoV spike protein.
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DOI:
10.1007/s00705-015-2506-z
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发表时间:
2015-09
影响因子:
2.7
通讯作者:
Fukushi S
Fukushi S
中科院分区:
医学4区
文献类型:
--
作者:
Fukuma A;Tani H;Taniguchi S;Shimojima M;Saijo M;Fukushi S

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中东呼吸综合征(MERS)冠状病毒(Co-V)含有一个单一的刺突(S)蛋白,它与受体分子二肽基肽酶4(DPP 4;也称为CD 26)结合,并作为中和抗原。假型病毒可用于测量针对高感染性病毒的中和滴度以及用于研究它们的进入机制。在这项研究中,我们构建了一系列的MERS-CoV S的胞质缺失突变体,并比较了它们与水泡性口炎病毒形成假型的效率。携带C-末端16个氨基酸缺失的S蛋白的假型(MERSpv-St 16)达到最大滴度,其比携带非截短全长S蛋白的假型高约10倍。使用MERSpv-St 16,我们证明了大鼠DPP 4不能作为MERS-CoV的功能性受体,表明大鼠对MERS-CoV感染不敏感。这项研究提供了新的信息,增强了我们对MERS-CoV宿主范围的理解。本文的在线版本(doi:10.1007/s 00705 -015-2506-z)包含补充材料,可供授权用户使用。
Middle East respiratory syndrome (MERS) coronavirus (Co-V) contains a single spike (S) protein, which binds to a receptor molecule, dipeptidyl peptidase 4 (DPP4; also known as CD26), and serves as a neutralizing antigen. Pseudotyped viruses are useful for measuring neutralization titers against highly infectious viruses as well as for studying their mechanism of entry. In this study, we constructed a series of cytoplasmic deletion mutants of MERS-CoV S and compared the efficiency with which they formed pseudotypes with vesicular stomatitis virus. A pseudotype bearing an S protein with the C-terminal 16 amino acids deleted (MERSpv-St16) reached a maximum titer that was approximately tenfold higher than that of a pseudotype bearing a non-truncated full-length S protein. Using MERSpv-St16, we demonstrated the inability of rat DPP4 to serve as a functional receptor for MERS-CoV, suggesting that rats are not susceptible to MERS-CoV infection. This study provides novel information that enhances our understanding of the host range of MERS-CoV. The online version of this article (doi:10.1007/s00705-015-2506-z) contains supplementary material, which is available to authorized users.
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期刊: EUROSURVEILLANCE
影响因子: 19
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