Polymorphisms in genes involved in vincristine pharmacokinetics or pharmacodynamics are not related to impaired motor performance in children with leukemia

Introduction: Impaired motor performance in children who completed treatment for acute lymphoblastic leukemia (ALL) may be related to polymorphisms of the metabolising gene CYP3A5 or vincristine toxicity related genes MDR-1 and MAPT. Methods: Motor performance was measured with the Movement Assessment Battery for Children (movement-ABC). DNA, from mononuclear blood cells was genotyped for CYP3A5, MDR-1 and MAPT polymorphisms. Results: Motor performance was not significantly affected by CYP3A5 *3/*3 and CYP3A5*1*3 genotypes, MDR-1 polymorphisms or MAPT haplotype. Conclusion: Our data did not show that CYP3A5, MDR-1 or MAPT polymorphisms are linked to impaired motor performance in children after treatment for ALL.