WHIM syndrome: Immunopathogenesis, treatment and cure strategies.

WHIM syndrome is a rare, autosomal dominant immunodeficiency which is named for the four key manifestations: Warts, Hypogammaglobulinemia, Infections, and Myelokathexis. It results from heterozygous gain-of-function mutations in the chemokine receptor CXCR4 which is widely expressed on leukocytes and has profound influences on immune system homeostasis and organogenesis. New treatments for the disease using drugs to reduce CXCR4 function are excellent examples of precision medicine. Since CXCR4 and its ligand CXCL12 play an important role in a variety of infectious, inflammatory, autoimmune, and malignant diseases, the study of WHIM syndrome provides important insights into both the physiologic and disease roles of these molecules.