Antagonism of betulinic acid on LPS-mediated inhibition of ABCA1 and cholesterol efflux through inhibiting nuclear factor-kappaB signaling pathway and miR-33 expression. oleh Guo-Jun Zhao, Shi-Lin Tang, Yun-Cheng Lv, Xin-Ping Ouyang, Ping-Ping He, Feng Yao, Wu-Jun Chen, Qian Lu, Yan-Yan Tang, Min Zhang, Yuchang Fu, Da-Wei Zhang, Kai Yin, Chao-Ke Tang