CCDC88B (coiled-coil and HOOK domain protein 88B) is a cytoskeletal scaffold protein that serves as a critical regulator of immune cell function and inflammatory responses. The protein acts as a positive regulator of T-cell maturation, activation, proliferation, and cytokine production in both CD4+ and CD8+ compartments 1. CCDC88B enhances dendritic cell (DC) migration and motility through interactions with ARHGEF2 and RASAL3, which regulate RHOA activation and cytoskeletal dynamics 2. Loss of CCDC88B impairs DC migration to lymph nodes and reduces contact hypersensitivity reactions 3. The protein also enhances NK cell cytotoxicity by regulating microtubule-organizing center polarization and lytic granule transport. CCDC88B demonstrates significant clinical relevance, as it is associated with susceptibility to multiple inflammatory and autoimmune diseases including inflammatory bowel disease 4, primary sclerosing cholangitis 5, and potentially Alzheimer's disease 6. Expression levels correlate with disease risk in Crohn's disease patients, and the gene maps to the 11q13 locus linked to various inflammatory disorders 1. CCDC88B represents a potential therapeutic target for inflammatory diseases due to its central role in coordinating immune cell functions.