Inhibitory effects of guggulsterone on TO901317 induced expressions of SHP1, LRH-1 and apoM in Caco-2 cells. Caco-2 cells were cultured with 5 μM TO901317 together with 3.0 μg/ml guggulsterone for 24 hrs. The mRNA levels of ABCA1, apoA1, SHP1, LRH-1 and apoM were determined by real-time RT-PCR in triplicates. The cells cultured with TO901317 alone were represented as 100%. Data represents one of two similar experiments (means ± SE, n = 4-6). *p < 0.05; **p < 0.01; ***p < 0.001 vs. controls.