Long intergenic non-protein coding RNA 221 (LINC00221)

Long intergenic non-protein coding RNA 221 (LINC00221) is a long non-coding RNA molecule that does not encode a protein, but exerts regulatory effects on gene expression at the post-transcriptional level. It is involved in modulating cellular proliferation and apoptosis by acting as a molecular sponge for specific microRNAs, including miR-152-3p and let-7a-5p. In leukemia, LINC00221 is downregulated and, when overexpressed, it suppresses cell proliferation and promotes apoptosis via the miR-152-3p/ATP2A2 axis. In hepatocellular carcinoma, LINC00221 is upregulated and promotes tumor progression through the let-7a-5p/MMP11 axis. LINC00221 has also been implicated in chemoresistance (cisplatin resistance) and may serve as a prognostic biomarker in certain cancer types. Although not a classical therapeutic target or receptor, LINC00221 plays an important role in disease pathogenesis and may offer future opportunities for RNA-based therapeutic interventions.

Other names

C14orf98NCRNA00221Putative uncharacterized protein HCG2042090LINC00221

None known, as there are no drugs directly targeting LINC00221. As a regulatory RNA, its mechanism in disease is primarily through RNA-RNA interactions that modulate mRNA availability by sequestering or "sponging" specific microRNAs, affecting downstream gene expression (e.g., sponging miR-152-3p to upregulate ATP2A2 in leukemia, or let-7a-5p to increase MMP11 in hepatocellular carcinoma).