Altogether, our study unveils a previously unrecognized HIF-1α–UBE2V1 positive feedback loop that is self-reinforcing and critically sustains the hypoxic microenvironment to drive HCC progression, highlighting UBE2V1 as both a promising prognostic biomarker and a compelling therapeutic target for HCC. The gene discussed is HIF1A; the disease is hepatocellular carcinoma.