Document Type : Research Articles
Department of Biomedical Science, Faculty of Science, Rangsit University, Pathumthani, Thailand.
Hematology unit, Pediatric departments, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand.
Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Microbiology unit, Department of Biomedical Science, Faculty of Science, Rangsit University, Pathumthani, Thailand.
Objectives: This study assessed associations of the miR196a2 (rs11614913) T>C polymorphism withsusceptibility to childhood acute lymphoblastic leukemia (ALL) and clinical outcomes. Materials and Methods: Blood DNA samples from 104 childhood ALL patients and 180 healthy children were studied for the miR-196a2 (rs11614913) polymorphism using a polymerase chain reaction-restriction fragment-length polymorphism (PCR-RFLP) approach. Results: The frequency of the miR-196a2 (rs11614913) T allele in controls was 0.51 compared with 0.33 in ALL cases. In this study, CC, TC heterozygote and CC/TC genotypes were significantly associated with increase childhood ALL susceptibility compared with the TT wild type (OR =4.321, 95% CI = 2.091-8.930 p=0.000, OR = 2.248, 95% CI =1.103-4.579, p=0.024, OR = 2.921, 95% CI = 1.504-5.673 p=0.001, respectively). However, the miR-196a2 (rs11614913) T>C polymorphism was not associated with demographic data or clinico-pathological data in ALL cases. Conclusion: CC, TC and CC+TC genotypes of miR-196a2 (rs11614913) was significantly associated with increased susceptibility in Thai childhood ALL but not with clinical variables.