[Genetic polymorphism of glutathione-S-transferase M1 and T1 in children with acute lymphoblastic leukemia].

Children with acute lymphoblastic leukemia (ALL) and deletions of glutathione-S-transferase M1 (GSTMI) and glutathione-S-transferase T1 (GSTT1) have better event-free survival and lower rates of relapses than those with GSTM1 and/or GSTT1. It is concluded that deletions of GSTM1 and/or GSTT1, double-null genotype are closely associated with the good prognosis of childhood ALL treated according to the ALL-BFM 90 and ALL-MB 91 protocols.