Not applicable. FUNDING This work has been supported by the National Natural Science Foundation of China (81770454 to ZH.Tang), the Key Project of the Education Department of Hunan Province (18A241 to LS. Liu), International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province (2018WK4031), the first-class discipline in Hunan Province, Scientific Research Fund of Hunan Provincial Education Department (20C1612), Hunan Provincial Innovation Foundation for Postgraduate (CX20190747) and Undergraduate Innovative Experiment Project (2018XJXZ366, 2018XJXZ369, S201910555135).