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학술저널
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김혜란 (동신대학교) 강민구 (광양사랑병원) Young Eun Lee (전남대학교) 나보람 (전남대학교병원) 노민선 (전남대학교) 양승현 (전남대학교) 신종희 (전남대학교) 신명근 (전남대학교)
저널정보
대한혈액학회 Blood Research Blood Research Vol.53 No.3
발행연도
2018.1
수록면
240 - 249 (10page)

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Background Mitochondrial DNA (mtDNA) mutations may regulate the progression and chemo-sensitivity of leukemia. Few studies regarding mitochondrial aberrations and hap-logroups in acute myeloid leukemia (AML) and their clinical impacts have been reported. Therefore, we focused on the mtDNA length heteroplasmies minisatellite instability (MSI), copy number alterations, and distribution of mitochondrial haplogroups in Korean patients with AML. Methods This study investigated 74 adult patients with AML and 70 controls to evaluate mtDNA sequence alterations, MSI, mtDNA copy number, haplogroups, and their clinical implications. The hypervariable (HV) control regions (HV1 and HV2), tRNAleu1gene, and cytochrome b gene of mtDNA were analyzed. Two mtDNA minisatellite markers, 16189 poly-C (16184CCCCCTCCCC16193, 5CT4C) and 303 poly-C (303CCCCCCCTCCCCC315, 7CT5C), were used to examine the mtDNA MSI. Results In AML, most mtDNA sequence variants were single nucleotide substitutions, but there were no significant differences compared to those in controls. The number of mtMSI pat-terns increased in AML. The mean mtDNA copy number of AML patients increased ap-proximately 9-fold compared to that of controls (P<0.0001). Haplogroup D4 was found in AML with a higher frequency compared to that in controls (31.0% vs. 15.7%, P=0.046). None of the aforementioned factors showed significant impacts on the outcomes. Conclusion AML cells disclosed more heterogeneous patterns with the mtMSI markers and had in-creased mtDNA copy numbers. These findings implicate mitochondrial genome in-stability in primary AML cells. Therefore, mtDNA haplogroup D4 might be associated with AML risk among Koreans.

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