Fig. 7

SNHG1 participates in epigenetic repression of KLF2 and CDKN2B by interacting with PRC2. a GSEA showed a significant correlation between the SNHG1 and genes in PRC2 related pathway. b Scatter plot showing the expression relationship among SNHG1, EZH2, SUZ12 and EED in colorectal tumor tissues from TCGA database. The upper right squares show the Pearson correlation between each other. c RIPs experiments for EZH2, SUZ12 and EED were performed and the coprecipitated RNA was subjected to qRT-PCR for SNHG1. GAPDH was employed as a negative control. d RNA pull-down was used to examine the association of SNHG1 and EZH2. AR binding to HuR was used as a positive control. e PRC2 target genes expression was detected by qRT-PCR in SNHG1 siRNAs transfected HCT-116 cells. f CDKN2B and KLF2 expression was detected by qRT-PCR in SNHG1 vector transfected or SNHG1 vector and EZH2 siRNAs co-transfected CRC cells. g CDKN2B and KLF2 protein levels were detected by western blot in indicated conditions. h ChIP assays were performed to detect EZH2 and H3K27me3 occupancy in the CDKN2B promoter region. i ChIP assays were performed to detect EZH2 and H3K27me3 occupancy in the KLF2 promoter region. *P < 0.05, **P < 0.01 and ***P < 0.001