IGF1 and B-cell chronic lymphocytic leukemia: The expression of related genes, such as cell migration [insulin-like growth factor-1 (IGF-1) and fibroblast growth factor-2 (FGF-2)], survival, antiapoptosis [IGF-1, B-cell chronic lymphocytic leukemia/lymphoma-2 (BCL-2) and survival protein], cell proliferation (IGF-1, FGF-2 and proliferating cell nuclear antigen, proliferation nuclear antigen) and periodontal ligament matrix formation (extracellular matrix protein, collagen, and periosteal protein) genes, was continuously promoted.