PLK1 and hepatocellular carcinoma: The elevation of E3 ubiquitin ligase F-box/SPRY domain-containing protein 1 (FBXO45) promotes hepatocellular carcinoma (HCC) tumorigenesis through IGF2BP1 ubiquitination and activation, resulting in the upregulation of polo-like kinase (PLK1) expression, suggesting possibility of a new therapeutic regimen for HCC that targets the FBXO45/IGF2BP1/PLK1 axis [91].