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. 2021 Jan 14;11:603830. doi: 10.3389/fphar.2020.603830

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Copyright © 2021 Liang, Qiu, Niu, Ma, Zhou, Chen, Zhang, Chen, Yang, Liu and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Inhibitory activity of HP-OVA against SARS-CoV-2 S-mediated cell-cell fusion. Images were captured at 12 h after treatment with HP-OVA or OVA on SARS-CoV-2 S protein-mediated cell-cell fusion. The syncytia of Vero E6 cells (A) or Huh 7 cells (B) and HEK293T cells with SARS-CoV-2 overexpression are marked in the pictures. Representative results from three fields were selected randomly from each sample with scale bars of 50 μm (C, D) The number of syncytia was counted under an inverted fluorescence microscope, and the percentage of inhibition was calculated as described in the Methods. Data are presented as the mean ± SD of triplicate samples from a representative experiment (*p < 0.05, **p < 0.01, ***p < 0.001).