The correlation between COL1A1 expression and the transcriptional levels of circCSPP1 and miR-193a-5p was then tested in CRC tissues, and the results showed that COL1A1 was positively correlated with circCSPP1 and negatively correlated with miR-193a-5p at the RNA level (Figures 7A,B). Here, COL1A1 is linked to colorectal carcinoma.