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急性髓系白血病患者白血病衍生外泌体富集及共分离双链DNA测序的可行性:新型白血病生物标志物检测的概念验证

Feasibility of Leukemia-Derived Exosome Enrichment and Co-isolated dsDNA Sequencing in Acute Myeloid Leukemia Patients: A Proof of Concept for New Leukemia Biomarkers Detection.

作者信息

Bernardi Simona, Farina Mirko, Bosio Katia, Di Lucanardo Anna, Leoni Alessandro, Re Federica, Polverelli Nicola, Turra Alessandro, Morello Enrico, Accorsi Buttini Eugenia, Zollner Tatiana, Bonvicini Cristian, Malagola Michele, Russo Domenico

机构信息

Department of Clinical and Experimental Sciences, University of Brescia, Bone Marrow Transplant Unit, ASST Spedali Civili, 25123 Brescia, Italy.

Centro di Ricerca Emato-Oncologica AIL (CREA), ASST Spedali Civili, 25123 Brescia, Italy.

出版信息

Cancers (Basel). 2022 Sep 16;14(18):4504. doi: 10.3390/cancers14184504.

Abstract

Exosomes are extracellular vesicles playing a pivotal role in the intercellular communication. They shuttle different cargoes, including nucleic acids from their cell of origin. For this reason, they have been studied as carriers of tumor markers in different liquid biopsy approaches, in particular for solid tumors. Few data are available concerning exosomes as markers of myeloid neoplasia. To better understand their real potential and the best approach to investigate leukemic exosomes, we present the results of a pilot feasibility study evaluating the application of next-generation sequencing analysis of dsDNA derived from exosomes isolated in 14 adult patients affected by acute myeloid leukemias. In particular, leukemia-derived exosome fractions have been analyzed. The concentration of dsDNA co-extracted with exosomes and the number and types of mutations detected were considered and compared with ones identified in the Bone Marrow (BM) and Peripheral Blood (PB) cells. Exosomal DNA concentration, both considering the cargo and the DNA surrounding the lipid membrane resulted in a linear correlation with leukemic burden. Moreover, exosomal DNA mutation status presented 86.5% of homology with BM and 75% with PB. The results of this pilot study confirmed the feasibility of a leukemia-derived exosome enrichment approach followed by exosomal dsDNA NGS analysis for AML biomarker detection. These data point to the use of liquid biopsy in myeloid neoplasia for the detection of active leukemic cells resident in the BM via a painless procedure.

摘要

外泌体是细胞外囊泡,在细胞间通讯中起关键作用。它们运输不同的物质,包括来自其起源细胞的核酸。因此,在不同的液体活检方法中,尤其是针对实体瘤,外泌体已被作为肿瘤标志物的载体进行研究。关于外泌体作为髓系肿瘤标志物的数据很少。为了更好地了解它们的实际潜力以及研究白血病外泌体的最佳方法,我们展示了一项初步可行性研究的结果,该研究评估了对14例成年急性髓系白血病患者分离出的外泌体来源的双链DNA进行下一代测序分析的应用。特别是,对白血病来源的外泌体组分进行了分析。考虑并比较了与外泌体共提取的双链DNA的浓度以及检测到的突变数量和类型,与在骨髓(BM)和外周血(PB)细胞中鉴定出的结果进行比较。无论是考虑外泌体携带的物质还是脂质膜周围的DNA,外泌体DNA浓度都与白血病负担呈线性相关。此外,外泌体DNA突变状态与骨髓的同源性为86.5%,与外周血的同源性为75%。这项初步研究的结果证实了白血病来源的外泌体富集方法结合外泌体双链DNA NGS分析用于急性髓系白血病生物标志物检测的可行性。这些数据表明,在髓系肿瘤中使用液体活检通过无痛程序检测骨髓中存在的活跃白血病细胞。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5294/9497185/171659914725/cancers-14-04504-g001.jpg

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