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Contribution of Matrix Metalloproteinase-7 Genotypes to the Risk of Non-solid Tumor, Childhood Leukemia.

Anticancer Research 2017 December
BACKGROUND/AIM: The matrix metalloproteinases (MMPs) are important in inflammation and carcinogenesis, and the genotypic role of MMP7 has never been examined in leukemia to date. Therefore, in this study we aimed to evaluate the contribution of the genotypic variants in the promoter region of MMP7 (A-181G and C-153T) to childhood acute lymphoblastic leukemia (ALL) risk in Taiwan.

MATERIALS AND METHODS: In this case-control study, 266 patients with childhood ALL and 266 non-cancer controls were genotyped by polymerase chain reaction-restriction fragment length polymorphism methodology.

RESULTS: The distribution of AA, AG and GG for MMP7 promoter A-181G genotype was 83.5, 12.0 and 4.5% in the childhood ALL group and 89.8%, 9.4 and 0.8% in the non-cancer control group, respectively (p for trend=0.0134), significantly differentially distributed between childhood ALL and control groups. The comparisons in allelic frequency distribution also support the findings that G appears to be the risky allele in childhood ALL. In genotype and gender interaction analysis, it was found that boys carrying the MMP7 A-181G GG and AG+GG genotypes had 9.05- and 2.45-fold odds ratios (ORs) (p=0.0135 and 0.0142, respectively) for childhood ALL compared to those carrying wild-type AA genotype. But these differences were not found in girls. Analysis of genotype interaction with age of onset age showed those aged less than 3.5 years at onset carrying the GG or AG+GG genotypes also had elevated ORs of 8.79- and 2.04-fold (p=0.0150 and 0.0413, respectively) for childhood ALL, but there was no such difference for those having an age at onset of 3.5 years or more.

CONCLUSION: Our results indicate that the MMP7 A-181G genotype interacts with age and gender and may serve as an early and predictive biomarker for childhood ALL.

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