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Microchip Module for Blood Sample Preparation and Nucleic Acid Amplification Reactions

机译:用于血液样品制备和核酸扩增反应的Microchip模块

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摘要

A computer numerical control-machined plexiglas-based microchip module was designed and constructed for the integration of blood sample preparation and nucleic acid amplification reactions. The microchip module is comprised of a custom-made heater-cooler for thermal cycling, a series of 254 μm × 254 μm microchannels for transporting human whole blood and reagents in and out of an 8–9 μL dual-purpose (cell isolation and PCR) glass-silicon microchip. White blood cells were first isolated from a small volume of human whole blood (<3 μL) in an integrated cell isolation–PCR microchip containing a series of 3.5-μm feature-sized “weir-type” filters, formed by an etched silicon dam spanning the flow chamber. A genomic target, a region in the human coagulation Factor V gene (226-bp), was subsequently directly amplified by microchip-based PCR on DNA released from white blood cells isolated on the filter section of the microchip mounted onto the microchip module. The microchip module provides a convenient means to simplify nucleic acid analyses by integrating two key steps in genetic testing procedures, cell isolation and PCR and promises to be adaptable for additional types of integrated assays.
机译:设计并构建了一个基于计算机数控加工的有机玻璃微芯片模块,用于整合血样制备和核酸扩增反应。微芯片模块包括一个用于热循环的定制加热器-冷却器,一系列254μm××254μm微通道,用于将人类全血和试剂运入和运出8–9μL双重用途(细胞分离和PCR) )玻璃-硅微芯片。首先在集成的细胞分离-PCR微芯片中从少量的人类全血(<3μL)中分离白细胞,该微芯片包含一系列由蚀刻的硅坝形成的3.5μm特征尺寸的“怪异型”滤膜。跨越流动室。随后,通过基于微芯片的PCR对从白细胞释放的DNA上直接扩增的基因组靶标(人类凝血因子V基因中的一个区域(226-bp))从白细胞上分离出来,该白细胞分离自安装在微芯片模块上的微芯片的过滤器部分。微芯片模块通过整合遗传测试程序中的两个关键步骤(细胞分离和PCR),提供了一种简化核酸分析的简便方法,并且有望适用于其他类型的整合测定。

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