Figure 7. The effect of L-THP on the antitumor efficiency of OXA in HT29 (a) and SW620 cells (b) and on antitumour efficiency (c) or OXA accumulation in tumours (d) in HT29 tumour-bearing nude mice. Data are expressed as the mean ± SEM, n = 6 for the study in cells and n = 8 for that in nude mice. Compared with the vehicle group,###P < 0.001.