PAPP-A negatively regulates ABCA1, ABCG1 and SR-B1 expression by inhibiting LXRalpha through the IGF-I-mediated signaling pathway - Tang, S L; Chen, W J; Yin, K; Zhao, G J; Mo, Z C; Lv, Y C; Ouyang, X P; Yu, X H; Kuang, H J; Jiang, Z S; Fu, Y C; Tang, C K (Atherosclerosis, 2012)