Long intergenic non-protein coding RNA 649 (LINC00649)

Long intergenic non-protein coding RNA 649 (LINC00649) is a long noncoding RNA found predominantly in the cytoplasm, where it functions as a microRNA sponge, forming part of competitive endogenous RNA networks[1][4]. LINC00649 is aberrantly expressed in multiple cancers including colorectal cancer, bladder cancer, and acute myeloid leukemia, where its overexpression has been associated with enhanced cell proliferation, migration, invasion, and poor patient prognosis[1][2][4]. In cancer biology, LINC00649 acts by binding specific microRNAs (e.g., miR-432-5p and miR-15a-5p), thereby releasing the inhibition on target mRNAs such as HDGF and HMGA1, which promote malignancy[1][4]. Its expression level and methylation profile are under investigation as diagnostic and prognostic biomarkers, particularly in AML[2]. Current research positions LINC00649 as a promising therapeutic target for several malignancies, though no approved drugs target this molecule directly.

Other names

TCONS_00028768lnc-ITSN1-2LINC00650Long intergenic non-protein coding RNA 650LOC101928126

Functions as a competitive endogenous RNA (ceRNA) interacting with microRNAs to regulate mRNA expression (e.g., sequestering miR-432-5p to upregulate HDGF in colorectal cancer[1]; miR-15a-5p to regulate HMGA1 in bladder cancer[4]); Modulates expression of downstream effectors involved in tumor growth and progression (e.g., HDGF, HMGA1[1][4])