The treatment of acute lymphoblastic leukemia (ALL) is one of the great success stories in oncology. However, patients who fail to achieve remission or relapse after chemotherapy continue to have a very poor prognosis, and the mechanisms underlying therapy failures are largely unknown. A new study suggests that gain-of-function mutations in NT5C2, a gene that encodes an enzyme that metabolizes chemotherapeutic drugs used against ALL, contribute to chemotherapy resistance (pages 368–371).
- Jon C. Aster
- Daniel J. DeAngelo
