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17 December 2016 : Clinical Research

Effect of the Polymorphism of Folylpolyglutamate Synthetase on Treatment of High-Dose Methotrexate in Pediatric Patients with Acute Lymphocytic Leukemia

Zhen Huang1AE, Hong-Fei Tong2BCD, Yuan Li1F, Jiang-Chao Qian1A, Ju-Xiang Wang1F, Zhe Wang3A, Ji-Chen Ruan1AG*

DOI: 10.12659/MSM.899021

Med Sci Monit 2016; 22:4967-4973

Abstract

BACKGROUND: The aim of this study was to investigate the association of the polymorphism of folylpolyglutamate synthetase (FPGS) with the dynamic plasma concentration of methotrexate (MTX) in pediatric patients with acute lymphocytic leukemia (ALL), as well as the prognosis.

MATERIAL AND METHODS: 57 ALL patients and 31 age and sex-matched children (control) were included in this study. Polymerase chain reaction-restriction fragment length polymorphism was performed for the analysis of the genotype of FPGS rs1544105 and high-performance liquid chromatography for measurement of MTX plasma concentration after 24-h and 44-h treatment. Overall survival was analyzed by Kaplan-Meier method.

RESULTS: No differences were observed between patients and controls regarding the distribution frequency of genotype and alleles of rs1544105. Patients carrying AA genotype had a significantly higher plasma concentration of MTX after 24 h than those carrying GG or GA (P<0.05) and no differences were found after 44 h. Kaplan-Meier survival analysis showed a longer median survival time in patients with AA than other genotypes with significant difference in overall survival.

CONCLUSIONS: Polymorphism of FPGS rs1544105 might be used as an effective approach for prediction of the treatment outcome of MTX.

Keywords: gamma-Glutamyl Hydrolase, Polymorphism, Single Nucleotide, Precursor Cell Lymphoblastic Leukemia-Lymphoma

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750