We would like to thank Institute of Pathogenic Biology, Medical College, University of South China. Funding. This work is supported by the grant from the National Natural Science Foundation of China (31570179), the Foundation of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control (No. 2014-5), the National student's innovation and entrepreneurship training program (201810555018). The Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study (2015-351).