Publication: Effect of genetic alterations of cytarabine-metabolizing enzymes in childhood acute lymphoblastic leukemia
Issued Date
2010-01-01
Resource Type
ISSN
16583876
Other identifier(s)
2-s2.0-79551637167
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Hematology/ Oncology and Stem Cell Therapy. Vol.3, No.3 (2010), 103-108
Suggested Citation
Chumphorn Banklaui, Sumalee Jindadamrongwech, Ruchchadol Sawangpanich, Suntaree Apibal, Suradej Hongeng, Karan Paisooksantivatana, Samart Pakakasama Effect of genetic alterations of cytarabine-metabolizing enzymes in childhood acute lymphoblastic leukemia. Hematology/ Oncology and Stem Cell Therapy. Vol.3, No.3 (2010), 103-108. doi:10.5144/1658-3876.2010.103 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/29825
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Effect of genetic alterations of cytarabine-metabolizing enzymes in childhood acute lymphoblastic leukemia
Other Contributor(s)
Abstract
BACKGROUND: Single nucleotide polymorphisms (SNPs) of deoxycytidine kinase (dCK) and cytidine deaminase (CDA) are known to alter their enzymatic activities, which affect the metabolism of cytarabine. Currently, treatment of childhood acute lymphoblastic leukemia (ALL) includes cytarabine, especially in high-risk patients. Therefore, we hypothesized that a genetic variation of dCK and CDA genes may influence the risk of cytarabine-related toxicities and early response to treatment. PATIENTS AND METHODS: We included children diagnosed with ALL and lymphoblastic lymphoma (LL) stage III and IV. The patients received a modified St Jude Total Therapy Study XV protocol. Cytarabine was used during induction remission (low-dose cytarabine) and reinduction II (high-dose cytarabine) phases. Genotyping of dCK -360C>G and -201C>T and CDA 79A>C and 208G>A was performed. Minimal residual disease (MRD) at the end of the induction phase was measured using flow cytometry. RESULTS: Ninety-four children with ALL (n=90) and LL (n=4) were analyzed. The median age at diagnosis was 5.8 years (range, 0.4-15 years). All four SNPs showed predominant wild type alleles. There was no CDA-208A allele in our population. Children with dCK-360G allele were at risk of mucositis after receiving low-dose cytarabine (OR=3.7; 95%CI, 1.2--11.3). Neither dCK nor CDA polymorphisms affected the MRD status at the end of induction phase. CONCLUSION: The dCK-360G allele was found to increase the risk of mucositis after exposure to low-dose cytarabine in childhood ALL therapy.