MEIS1 and colorectal cancer: LncRNA ELFN1-AS1 promotes DNA methylation and H3K27me3 in the promoter region of MEIS1 by guiding EZH2-DNMT3 a to locate in the promoter region of MEIS1, inhibits the transcription of MEIS1, and thus promotes oxaliplatin resistance in colorectal cancer by preventing DNA damage repair [23].