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논문 기본 정보

자료유형
학술저널
저자정보
Miyoung Kim (University of Ulsan College of Medicine) Nan Young Kim (Hallym University Medical Center) Sangkyoon Hong (Hallym University Medical Center) Jiwon Lee (Green Cross Laboratories) Yonggeun Cho (Hallym University College of Medicine) Han-Sung Kim (Hallym University College of Medicine) Hee Jung Kang (Hallym University College of Medicine) Young Kyung Lee (Hallym University College of Medicine)
저널정보
대한임상검사정도관리협회 Journal of Laboratory Medicine And Quality Assurance Laboratory Medicine and Quality Assurance 제44권 제2호
발행연도
2022.6
수록면
76 - 81 (6page)
DOI
10.15263/jlmqa.2022.44.2.76

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Background: The ASXL1 codon 646 variant is the most common ASXL1 variant that negatively impacts the prognoses of patients with myeloid malignancies, particularly those with myelodysplastic syndromes and acute myeloid leukemia. However, it has been suggested that this mutation is not somatic but rather an artifact of next-generation sequencing (NGS) owing to its location in an 8 bp guanine mononucleotide repeat. In this study, we evaluated the performance of amplicon-based NGS in discriminating the ASXL1 codon 646 variant. Methods: Amplicon-based NGS was performed on the Myeloid DNA Reference Standard HD829 in varying reference material dilution ratios using the TruSight Myeloid panel and a MiSeqDx system. Results: The expected and measured variant allele frequencies (VAFs) of the ASXL1 codon 646 mutation in the reference material were 40.00% and 18.65%, respectively. The measured VAFs in reference materials serially diluted at 1:1, 1:2, 1:4, and 1:8 were 9.09%, 5.82%, 1.92%, and 2.87%, respectively (y=0.4391x+0.8642; r 2=0.9846). Most of the other variants showed VAFs comparable to expected VAFs. Conclusions: The measured allele frequencies of the ASXL1 codon 646 variant in the serially diluted reference materials were approximately half their expected values, suggesting difficulties in the correct detection of the variant using amplicon-based NGS.

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