Author: Zhou, Jie; Li, Cun; Sachs, Norman; Chiu, Man Chun; Wong, Bosco Ho-Yin; Chu, Hin; Poon, Vincent Kwok-Man; Wang, Dong; Zhao, Xiaoyu; Wen, Lei; Song, Wenjun; Yuan, Shuofeng; Wong, Kenneth Kak-Yuen; Chan, Jasper Fuk-Woo; To, Kelvin Kai-Wang; Chen, Honglin; Clevers, Hans; Yuen, Kwok-Yung
Title: Differentiated human airway organoids to assess infectivity of emerging influenza virus Document date: 2018_6_26
ID: z637eh2z_10
Snippet: We isolated, plaque-purified, and genotyped these cocirculating viruses. We chose to compare the infectivity of H7N2 with that of H7N9/Ah in the PD organoids as a proof of concept, to verify that the differentiated AOs can indeed simulate human airway epithelium in the context of influenza virus infection. Fig. 4 shows that viral loads in the cell lysate and medium of H7N9/ Ah-infected organoids increased gradually after inoculation; the viral t.....
Document: We isolated, plaque-purified, and genotyped these cocirculating viruses. We chose to compare the infectivity of H7N2 with that of H7N9/Ah in the PD organoids as a proof of concept, to verify that the differentiated AOs can indeed simulate human airway epithelium in the context of influenza virus infection. Fig. 4 shows that viral loads in the cell lysate and medium of H7N9/ Ah-infected organoids increased gradually after inoculation; the viral titer increased more than 3 log 10 units within 24 h, indicating a robust viral replication. The addition of the serine protease inhibitor AEBSF significantly restricted the active replication of H7N9/Ah virus, highlighting the importance of elevated serine proteases for viral replication. In contrast, H7N2 propagated modestly, with viral titer 2-3 log 10 units lower than H7N9/Ah. Thus, the distinct efficiencies of H7N9/Ah and H7N2 to infect and replicate in the PD AOs can recapitulate the infectivity of these viruses in humans.
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