Bestatin suppresses the BLT1-ERK1/2 signaling pathway in CRC patients. (a–c) mRNA levels of BLT1, c-Myc, and Ki-67 in human CRC patient tissues were analyzed by quantitative PCR (qPCR). Relative mRNA levels were normalized against GAPDH. The data are shown as mean values ± S.E. from triplicate experiments and the asterisks (**, ***) indicate a significant (p < .01, p < .001) decrease in tissues from the group treated with bestatin compared with the untreated group. (d) Immunohistochemistry analysis was used to determine the expression of BLT1, p-ERK1/2 (Thr202/Tyr204), c-Myc,and Ki-67 in patients treated with bestatin compared with untreated patients. The asterisks (*, **, ***) indicate a significant (p < .05, p < .01, p < .001, respectively) decrease in protein expression in the bestatin-treated group compared with the untreated group (scale bar, 100 μm). (e) The expression of BLT1, p-MEK (Ser217/221), p-ERK1/2 (Thr202/Tyr204), c-Myc, and Ki-67 was also determined by Western blot.