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Comparison of Automated and Manual DNA Isolation Methods of Liquid-Based Cytology Samples.
Biopreservation and Biobanking ( IF 1.6 ) Pub Date : 2019-09-26 , DOI: 10.1089/bio.2018.0148
Irma G Domínguez-Vigil 1, 2 , Víctor H Barajas-Olmos 1 , Lenny Gallardo-Alvarado 3 , Antonio A Pérez-Maya 1 , Maria L Garza-Rodríguez 4 , Gerardo I Magallanes-Garza 5 , Servando Cardona-Huerta 5 , Daniel H Méndez-Lozano 6 , Oscar Vidal-Gutiérrez 4 , David F Cantú De León 3 , Hugo A Barrera-Saldaña 1, 7, 8
Affiliation  

Liquid-based cytology (LBC) has been used as a diagnostic tool for cervical cancer for years and is now being adopted for other gynecological cancers. LBC represents an important challenge to ensure that the process yields representative biospecimens for quality control (QC) of diagnostic procedures. In this study, we compare QC parameters (integrity, yield and purity, and polymerase chain reaction [PCR] amplification) of DNA isolated from LBC (N = 296) using two different nucleic acid isolation methods, manual (n = 233) or automated (n = 63). We also evaluated two different types of cytological brushes for sampling from the cervix. Our results suggest that manual isolation (yield 22.81 ± 1.92 μg) resulted in increased DNA recovery when compared with automated isolation (yield 9.96 ± 1.11 μg) from LBC samples, with a p-value of <0.0003. We estimated that 98% (53/54) of the samples preserved the integrity of DNA and were suitable for standard molecular biology analyses. The β-globin gene was amplified in 100% (296/296) of the DNA samples by endpoint PCR. We found no significant difference between the performance of the cytological brushes (p value of <0.6711) in a general overview. However, when looking at the results from using each brush individually, the manual isolation method was statistically superior to the automated method. Our work illustrates the impact of good QC of preanalytic conditions, which will be important for the application of LBC for developing early detection methods for gynecological cancers.

中文翻译:

液基细胞学样品自动和手动DNA分离方法的比较。

液基细胞学(LBC)多年来一直用作宫颈癌的诊断工具,现在正被其他妇科癌症所采用。LBC代表着一项重要挑战,要确保该过程产生具有代表性的生物标本以用于诊断程序的质量控制(QC)。在这项研究中,我们比较了使用两种不同的核酸分离方法(手动(n = 233)或自动)从LBC(N = 296)分离的DNA的QC参数(完整性,产率和纯度以及聚合酶链反应[PCR]扩增) (n = 63)。我们还评估了两种不同类型的细胞刷以从子宫颈取样。我们的结果表明,与从LBC样品中自动分离(产量9.96±1.11μg)相比,手动分离(产量22.81±1.92μg)可提高DNA回收率,p值<0.0003。我们估计98%(53/54)的样品保留了DNA的完整性,适合进行标准分子生物学分析。通过终点PCR在100%(296/296)的DNA样品中扩增了β-珠蛋白基因。在总体概述中,我们发现细胞刷的性能之间没有显着差异(p值<0.6711)。但是,从单独使用每个画笔的结果看,手动隔离方法在统计上优于自动方法。我们的工作说明了分析前条件良好QC的影响,这对于LBC在开发妇科癌症早期检测方法中的应用将至关重要。通过终点PCR在100%(296/296)的DNA样品中扩增了β-珠蛋白基因。在总体概述中,我们发现细胞刷的性能之间没有显着差异(p值<0.6711)。但是,从单独使用每个画笔的结果看,手动隔离方法在统计上优于自动方法。我们的工作说明了分析前条件良好QC的影响,这对于LBC在开发妇科癌症早期检测方法中的应用将至关重要。通过终点PCR在100%(296/296)的DNA样品中扩增了β-珠蛋白基因。在总体概述中,我们发现细胞刷的性能之间没有显着差异(p值<0.6711)。但是,从单独使用每个画笔的结果看,手动隔离方法在统计上优于自动方法。我们的工作说明了分析前条件良好QC的影响,这对于LBC在开发妇科癌症早期检测方法中的应用将至关重要。在统计上,手动隔离方法优于自动方法。我们的工作说明了分析前条件良好QC的影响,这对于LBC在开发妇科癌症早期检测方法中的应用将至关重要。在统计上,手动隔离方法优于自动方法。我们的工作说明了分析前条件良好QC的影响,这对于LBC在开发妇科癌症早期检测方法中的应用将至关重要。
更新日期:2019-11-01
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