PMID: 30004199Nov 1, 2016Paper

Expression of Type-Ι Interferon Production Pathway-Related Genes Induced by Infection Due to Enterovirus 71 or Coxsackievirus A16 in Normal Human Airway Epithelial Cells

Bing du xue bao = Chinese journal of virology
Jie SongLongding Liu

Abstract

Hand, foot, and mouth disease(HFMD)is caused by mainly enterovirus 71(EV-A71)and coxsackievirus A16(CV-A16),and is a serious healthcare problem worldwide.EV-A71 infection is thought to progress readily to serious complications whereas CV-A16 infection, in general, results in mild symptoms and presents repeatedly. However, the underlying mechanisms leading to these differences are not known. We compared changes in expression of type-I interferon(IFN-I)-related genes in normal human bronchial epithelial(16HBE) cells. Gene-expression levels of TLR3,MAVS,MDA5,MyD88,IRF7,IFNαand IFNβwere elevated significantly after EVA71 infection.MDA5expression was increased markedly, and that of TLR3 and IRF3was decreased obviously after CV-A16 infection, but that of MAVS,MyD88,IFNαand IFNβdid not show significant differences. Viral copy number and viral titers suggested that CV-A16 replicates more efficiently than EV-A71 in 16HBE.These results suggest that IFN-I production pathway-related genes in response to infection by EV-A71 and CV-A16 have notable discrepancies. Such information could shine a light on the different manifestations caused by EV-A71 and CV-A16,and the mechanism of repeat infection by CV-A16.

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