Journal article
Amplification-by-Polymerization in Biosensing for Human Genomic DNA Detection
ACS sensors, v 4(4), pp 992-1000
26 Apr 2019
PMID: 30942069
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
A polymerization reaction was employed as a signal amplification method to realize direct visualization of gender-specific DNA extracted from human blood in a polymerase chain reaction (PCR)-free fashion. Clear distinction between X and Y chromosomes was observed by naked eyes for detector-free sensing purposes. The grown polymer films atop X and Y chromosomes were quantitatively measured by ellipsometry for thickness readings. Detection assays have been optimized for genomic DNA recognition to a maximum extent by varying the selection of the proper blocking reagents, the annealing temperature, and the annealing time. Traditional PCR and gel electrophoresis for amplicon identification were conducted in parallel for performance comparison. In the blind test for blood samples examined by the new approach, 25 out of 26 were correct and one was false negative, which was comparable to, if not better than, the PCR results. This is the first time our amplification-by-polymerization technique is being used for chromosome DNA analysis. The potential of adopting the described sensing technique without PCR was demonstrated, which could further promote the development of a portable, PCR-free DNA sensing device for point-of-need applications.
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Details
- Title
- Amplification-by-Polymerization in Biosensing for Human Genomic DNA Detection
- Creators
- Peng He - North Carolina Agricultural and Technical State UniversityXinhui Lou - Capital Normal UniversitySusan M Woody - North Carolina State UniversityLin He - Drexel University
- Publication Details
- ACS sensors, v 4(4), pp 992-1000
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000466442500027
- Scopus ID
- 2-s2.0-85064937915
- Other Identifier
- 991019168262804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Analytical
- Chemistry, Multidisciplinary
- Nanoscience & Nanotechnology