PDAP1 (PDGFA-associated protein 1) is a multifunctional phosphoprotein with context-dependent roles in cell growth, translation, and disease pathogenesis. As an eIF4E-binding protein, PDAP1 regulates cap-independent translation and is essential for hepatovirus protein synthesis and stress-resistant translation during endoplasmic reticulum stress 1. PDAP1 also functions as an RNA-binding protein that restrains T-cell proliferation through the miR-150/PDAP1 axis controlled by RFX transcription factors 2. In cancer biology, PDAP1 promotes colorectal cancer progression by interacting with EGFR's juxtamembrane domain and activating EGFR-MAPK signaling downstream of c-Myc transcriptional control 3. PDAP1 depletion suppresses basal-like breast tumor growth and is identified as a ferroptosis repressor 4. Additionally, PDAP1 mediates gemcitabine resistance in pancreatic cancer through LINC00460-regulated PDGFA/PDGFR signaling in cancer-associated fibroblasts 5. Clinically, elevated PDAP1 associates with poor prognosis and accelerated cellular senescence 6. PDAP1 upregulation is linked to COPD pathogenesis and disulfidptosis-related mechanisms 7. PDAP1 knockdown enhances chemotherapy sensitivity in acute lymphoblastic leukemia by disrupting STAT6-ERK-NF-κB signaling networks 8. These findings position PDAP1 as a potential therapeutic target across multiple disease contexts.