Integrated, DC voltage-driven nucleic acid diagnostic platform for real sample analysis: Detection of oral cancer

TALANTA

卷:145

Article

Slouka, Zdenek^1,2  Senapati, Satyajyoti¹  Shah, Sunny¹  Lawler, Robin¹  Shi, Zonggao^3,4  Stack, M. Sharon^3,4  Chang, Hsueh-Chia¹ 

[1] Univ Notre Dame, Dept Chem & Biomol Engn, Notre Dame, IN 46556 USA

[2] Univ Chem & Technol, Dept Chem Engn, Tech 3, Prague 16628 6, Czech Republic

[3] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA

[4] Univ Notre Dame, Harper Canc Res Inst, Notre Dame, IN 46556 USA

关键词: Point-of-care diagnostics;    Ion exchange membranes;    Oral cancer;    Electrokinetics;    Integrated platform technology;    Sample-to-answer detection;   

DOI  :  10.1016/j.talanta.2015.04.083

来源: Elsevier

【 摘 要 】

We present an integrated and low-cost microfluidic platform capable of extraction of nucleic acids from real biological samples. We demonstrate the application of this platform in pathogen detection and cancer screening. The integrated platform consists of three units including a pretreatment unit for separation of nucleic acids from lysates, a preconcentration unit for concentration of isolated nucleic acids and a sensing unit localized at a designated position on the chip for specific detection of the target nucleic acid. The platform is based on various electrokinetic phenomena exhibited by ion exchange membranes in a DC electrical field that allow them to serve as molecular filters, analyte preconcentrators and sensors. In this manuscript, we describe each unit of the integrated chip separately and show specific detection of a microRNA (miRNA 146a) biomarker associated with oral cancer as a proof-of-concept experiment. This platform technology can easily be extended to other targets of interest by optimizing the properties of the ion exchange membranes and the specific probes functionalized onto the sensors. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free