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The influence of cyclin D1 (CCND1) 870A>G polymorphism and CCND1-thymidylate synthase (TS) gene-gene interaction on the outcome of childhood acute lymphoblastic leukaemia

, : The influence of cyclin D1 (CCND1) 870A>G polymorphism and CCND1-thymidylate synthase (TS) gene-gene interaction on the outcome of childhood acute lymphoblastic leukaemia. Pharmacogenetics 13(9): 577-580

The 870A>G polymorphism in the cyclin D1 (CCND1) gene modulates mRNA splicing, leading to altered protein that may affect the regulation of the G1/S cell-cycle checkpoint. This polymorphism has been reported to influence susceptibility to and progression of several malignancies. Furthermore, the change of retinoblastoma protein regulation mediated by CCND1 may play a role in the development of methotrexate (MTX) resistance via an associated higher activity of enzymes that are inhibited by MTX. This study shows that children with acute lymphoblastic leukaemia (ALL) who are homozygous for the CCND1 A variant have a lower probability of event-free survival (P = 0.006) compared to carriers of the G variant. A significant result is retained in the presence of other prognostic factors. This impact is even more apparent in individuals who are also homozygous for thymidylate synthase (TS) triple repeat (P < 0.00005), which has previously been shown to influence the outcome of childhood ALL.


PMID: 12972956

DOI: 10.1097/01.fpc.0000054123.14659.57

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