Summary
Abstract
Introduction
Protocol
Representative Results
Discussion
Acknowledgements
Materials
References
Cancer Research
ERRATUM NOTICE
Important: There has been an erratum issued for this article. Read more …提出的诊断FL-DNA试剂盒是一种节省时间和用户友好的方法,用于确定存在结肠直肠癌病变的可靠概率。
如今,凳子DNA可以通过几种方法进行分离和分析。通过qPCR测定可以检测粪便中DNA的长片段,它提供了出现前肿瘤或肿瘤性结肠直肠病变的可靠概率。这种方法,称为荧光长DNA(FL-DNA),是一个快速,非侵入性的程序,是一个改善的主要预防系统。该方法基于对基因组DNA特定靶点进行定量扩增,对粪便DNA完整性进行评估。特别是,对超过200bp的DNA片段的评估可以检测出具有极高特异性的结肠直肠病变患者。然而,该系统和所有目前可用的粪便DNA测试提出了一些需要解决的一般问题(例如,应进行测试的频率和在每个时间点为每个个体收集的粪便样本的最佳数量)。然而,FL-DNA的主要优点是有可能将其与目前用于CRC筛查程序的测试(称为免疫化学基粪便隐匿血测试(iFOBT)结合使用。事实上,两个测试都可以在同一样本上进行,从而降低成本,并更好地预测结肠直肠病变的最终存在。
结肠直肠癌(CRC)源于一个多步骤的过程,其中健康的上皮慢慢发展成腺瘤或息肉,随着时间的推移,它逐渐发展成恶性癌。,2尽管CRC的发病率很高,但在过去十年中,死亡人数呈下降趋势。事实上,筛查计划采用的早期诊断工具已导致早期发现和去除肿瘤前腺瘤或息肉4。然而,由于不同的技术限制,这些方法都不是最佳的。事实上,为了提高灵敏度和特异性,许多粪便DNA测试都是单独提出的,或与当前常规诊断测试55、66结合提出。
通常,健康的粘血症会排入粪便流中凋亡的结肠细胞,而患病的粘卵菌会去角质非凋亡结肠细胞。长度为200bp或以上的片段是非凋亡DNA的特征。这种DNA被称为长DNA(L-DNA),已成为CRC早期诊断的可利用生物标志物。L-DNA可以从粪便标本中分离出来,并使用体外诊断FL-DNA试剂盒77、8、9、10、11、128,9,
2013年至2015年,在梅尔多拉(FC,意大利FC)的科罗马诺洛科学组织(IRST)招募了患者。注册患者进入 IRSTB002 协议,经 IRST 道德委员会 - IRCCS AVR (25/10/2012,第 1 条) 批准。所有方法均按照相关准则和条例执行。所有患者均获得书面知情同意。
1. 从凳子中提取DNA
Name | Company | Catalog Number | Comments |
1.5 mL and 2 mL polypropylene twist-lock tubes (DNase-, RNase-, DNA-, PCR inhibitor-free) | Consumables required for DNA extraction and Real Time PCR | ||
Absolute Ethanol (quality of analytical degree) | Reagent required for DNA extraction | ||
Benchtop centrifuge | Maximum speed of 20000 x g. Instrument required for DNA extraction | ||
EasyPGX analysis software version 2.0.0 | Diatech Pharmacogenetics | RT800-SW | Analysis software |
EasyPGX centrifuge/vortex 8-well strips | Diatech Pharmacogenetics | RT803 | Instrument recommended for the Real Time PCR assay |
EasyPGX qPCR instrument 96 | Diatech Pharmacogenetics | RT800-96 | Instrument recommended for the Real Time PCR assay |
EasyPGX ready FL-DNA | Diatech Pharmacogenetics | RT029 | Kit required for the Real Time PCR assay |
Micropipettes (volumes from 1 to 1.000 µL) | Consumables required for DNA extraction and Real Time PCR | ||
Powder-free disposable gloves | Consumables required for DNA extraction and Real Time PCR | ||
QIAamp Fast DNA Stool | Qiagen | 51604 | Kit recommended for the DNA extraction and purification from stool |
Sterile filter tips DNase-, RNase-free (volumes from 1 to 1.000 µL) | Consumables required for DNA extraction and Real Time PCR | ||
Thermal block e.g. EasyPGX dry block | Diatech Pharmacogenetics | RT801 | Instrument required for DNA extraction |
Vortex e.g. EasyPGX centrifuge/vortex 1.5 ml | Diatech Pharmacogenetics | RT802 | Instrument required for DNA extraction |
Erratum
Erratum: Evaluation of Colorectal Cancer Risk and Prevalence by Stool DNA Integrity DetectionAn erratum was issued for: Evaluation of Colorectal Cancer Risk and Prevalence by Stool DNA Integrity Detection. An affiliation was updated.
The first affiliation was updated from:
Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST)
to:
Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
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