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논문 기본 정보

자료유형
학술저널
저자정보
Dong Jin Park (Seoul St. Mary’s Hospital) Ahlm Kwon (Seoul St. Mary’s Hospital) Byung-Sik Cho (Catholic Blood and Marrow Transplantation Center) Hee-Je Kim (Catholic Blood and Marrow Transplantation Center) Kyung-Ah Hwang (Genetree Research Seoul) Myungshin Kim (Seoul St. Mary’s Hospital) Yonggoo Kim (Seoul St. Mary’s Hospital)
저널정보
대한혈액학회 Blood Research Blood Research Vol.55 No.1
발행연도
2020.1
수록면
17 - 26 (10page)

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DNMT3A mutations occur in approximately 20% of AML cases and are associated with changes in DNA methylation. CDKN2B plays an important role in the regulation of hema-topoietic progenitor cells and DNMT3A mutation is associated with CDKN2B promoter methylation. We analyzed the characteristics of DNMT3A mutations including their clin-ical significance in AML and their influence on promoter methylation and CDKN2Bexpression.MethodsA total of 142 adults, recently diagnosed with de novo AML, were enrolled in the study. Mutations in DNMT3A, CEBPA, and NPM1 were analyzed by bidirectional Sanger sequencing. We evaluated CDKN2B promoter methylation and expression using py-rosequencing and RT-qPCR.ResultsWe identified DNMT3A mutations in 19.7% (N=28) of enrolled patients with AML, which increased to 29.5% when analysis was restricted to cytogenetically normal-AML. Mutations were located on exons from 8‒23, and the majority, including R882, were found to be present on exon 23. We also identified a novel frameshift mutation, c.1590delC, in AML with biallelic mutation of CEBPA. There was no significant difference in CDKN2B promoter methylation according to the presence or type of DNMT3Amutations. CDKN2B expression inversely correlated with CDKN2B promoter methyl-ation and was significantly higher in AML with R882H mutation in DNMT3A. We demon-strated that DNMT3A mutation was associated with poor AML outcomes, especially in cytogenetically normal-AML. The DNMT3A mutation remained as the independent un-favorable prognostic factor after multivariate analysis.ConclusionWe characterized DNMT3A mutations in AML and revealed the association between the DNMT3A mutation and CDKN2B expression and clinical outcome.

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