CKAP2 (cytoskeleton associated protein 2) is a microtubule-stabilizing protein that plays critical roles in cell cycle regulation, proliferation, and disease pathogenesis. The protein functions as a regulator of cellular senescence, with siRNA knockdown studies demonstrating that CKAP2 depletion induces senescence markers including p16/p21 activation and morphological changes characteristic of senescent cells 1. CKAP2 operates through multiple mechanisms including regulation of cell cycle progression, mitosis, and cellular proliferation 1. In colorectal cancer, CKAP2 is regulated by transcription factor TFDP1 and promotes tumor metastasis and proliferation by affecting the tumor microenvironment, including M2 macrophage polarization and angiogenesis 2. The protein shows significant disease relevance across multiple conditions. In rheumatoid arthritis, CKAP2 is highly expressed in synovial tissues and promotes proliferation, migration, and invasion of synovial cells through the IL-6/JAK/STAT3 pathway 3. Genome-wide association studies have identified CKAP2 as a susceptibility locus for irritable bowel syndrome 4. Clinically, CKAP2 demonstrates diagnostic and prognostic potential across several diseases, serving as a biomarker for rheumatoid arthritis 3, ARDS in elderly patients 5, and gastric cancer where elevated expression correlates with favorable prognosis 6.