MIR621 (MicroRNA 621)

Drug sensitivity analysis showed that the risk score was significantly correlated with the sensitivity to various chemotherapeutic drugs (e.g., Methotrexate, Paclitaxel). This study established a reliable prognostic risk scoring model for HCC by screening differentially expressed glycolysis-related miRNAs, which effectively distinguishes between high-risk and low-risk patients and predicts patient survival. Additionally, the model is closely associated with the immune microenvironment and drug sensitivity, offering strong support for personalized treatment and clinical decision-making in HCC.

MiR-621 is a vital tumor suppressor in CRC and could be a promising anti-cancer therapeutic target.

Mechanistically, circ_0000705 acted as a ceRNA by sponging miR-621, thereby facilitating PYCR1 expression in ESCC cells. In conclusion, circ_0000705 promoted proline metabolism and malignant progression of ESCC by regulating the miR‑621/PYCR1 axis.

Circ_0000064 can participate in the GC progression via modulating miR-621/SYF2 axis. This implies that circ_0000064 may be a new diagnosed biomarker or a new therapeutic target of GC.

In addition, SNHG10 overexpression significantly promoted BMMNC proliferation, whereas miR-621 overexpression inhibited BMMNC proliferation and abolished the effect of SNHG10 overexpression on BMMNC proliferation. miR-621 targets SNHG10 to suppress cell proliferation in AML.

In addition, AURKA overexpression reversed the effect of miR-621 on the growth of cancer cells. Taken together, our results suggest that miR-621 is an important tumor suppressor in gastric cancer and could be a promising target for the cancer treatment.