Figure 5. TCF4 interacted with INTU and IFT88 promoters and mediated their gene expression. (A, B) The binding between TCF4 and INTU and IFT88 promoters was detected in NCI-H1975 (A) and AN3 CA (B) cells. n = 3 biological replicates. Each n represents an independent preparation of ChIP samples. Error bars represent S.E.M. Statistical analysis was performed using two-tailed unpaired Student’s t-test. * denotes p < 0.05 and ** denotes p < 0.01. (C, D) Knockdown of TCF4 downregulated the transcript levels of INTU and IFT88 in NCI-H1975 (C) and AN3 CA (D) cells. n = 3 biological replicates. Each n represents an independent preparation of RNA and protein samples. Error bars represent S.E.M. Statistical analysis was performed using two-tailed unpaired Student’s t-test. *denotes p < 0.05, **denotes p < 0.01 and ***denotes p < 0.001.