The present invention is directed to methods of treating T-cell acute lymphoblastic leukemia. This method involves selecting a subject having T-cell acute lymphoblastic leukemia and administering, to the selected subject, a therapeutic agent that inhibits CXCR4-CXCL12 signaling at a dosage effective to treat the T-cell acute lymphoblastic leukemia in the subject. A method of inhibiting T-cell acute lymphoblastic leukemia cell proliferation and/or survival is also disclosed.
