Ion Torrent PGMTM测序在急性髓系白血病检测中的应用
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国家临床重点专科建设项目经费资助;南方医院院长基金(2012C010)。


Preliminary application of Ion Torrent PGMTM sequencing technology in the diagnosis of acute myeloid leukemia
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    摘要:

    摘要:目的:探讨Ion Torrent PGMTM测序平台用于急性髓系白血病(AML)患者基因突变检测的可行性。 方法: 提取27例AML患者初次治疗前的骨髓DNA,用Ion Torrent PGMTM测序仪对50个常见的肿瘤基因热点突变区进行检测,同时用Sanger测序法检测FMS样酪氨酸激酶3(FLT3)和核仁磷蛋白1(NPM1)基因的突变情况以进行验证。 结果:50个目标基因中检出17个基因共29个突变位点,单个基因有多种突变方式,以单碱基替换为主。突变频率最高的是NPM1(22.2%)和FLT3(18.5%)。用Sanger测序法验证,NPM1两种方法检测的吻合度为100%,在FLT3验证中,其中有1例Sanger测序为阳性,而Ion Torrent PGMTM检测为阴性。 结论:Ion Torrent PGMTM能够在短时间内得到AML患者的基因突变谱,但其在检测长片段插入/缺失中的缺陷仍需改进。

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    Abstract: Objective:To evaluate the feasibility of the Ion Torrent PGMTM sequencing technology for detecting gene mutation in patients with acute myeloid leukemia (AML). Methods: Mutational hotspots of 50 cancer related genes in pretherapeutic bone marrow DNA samples from 27 AML patients were detected by Ion Torrent PGMTM technology. Then, Sanger sequencing was used to verify the corresponding mutations in FMS-related tyrosine kinase 3 (FLT3) and nucleophosmin 1 (NPM1) genes. Results:Twenty nine mutational sites from 17 of 50 cancer related genes were identified by Ion Torrent PGMTM technology. There were multiple mutations in the same gene, and most of them were single base substitution. The highest mutation frequency was from NPM1 gene (22.2%) and the following by FLT3 (18.5%). The consistency of Ion Torrent PGMTM and Sanger sequencing was 100% in NPM1 gene, while in FLT3, one positive for Sanger sequencing but negative for Ion Torrent PGMTM. Conclusion:Mutation spectrum of AML patients may be obtained during short time by Ion Torrent PGMTM technology. However, the detection of long fragment insertion or deletion by Ion Torrent PGMTM needs to be improved.

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阴常欣,吴福群,曹睿,江雪杰,余国攀,何涵,孟凡义. Ion Torrent PGMTM测序在急性髓系白血病检测中的应用[J].临床检验杂志,2015,(5):333-336

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  • 收稿日期:2015-01-19
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  • 在线发布日期: 2015-07-22
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