Based on limited published evidence, PCNX3 is a protein with demonstrated binding capability. In lung cancer, PCNX functions as a competitive endogenous RNA (ceRNA) that regulates S-phase kinase associated protein 2 (Skp2) through miRNA-dependent mechanisms involving miR-26, miR-182, miR-340, and miR-506 1. PCNX3's 3' UTR promotes lung cancer cell growth, proliferation, and cell cycle progression while suppressing apoptosis, suggesting an oncogenic role in non-small cell lung cancer 1.