期刊
ACS NANO
卷 3, 期 10, 页码 3207-3213出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn900733d
关键词
electrochemical biosensing; nanostructures; biomarker; diagnostic; microchip
类别
资金
- Genome Canada
- Ontario Ministry of Research and Innovation
- Prostate Cancer Research Foundation
- Ontario Centres of Excellence
- NSERC
- Ontario Institute of Cancer Research
- Canada Foundation for Innovation
- Cancer Research Society
The analysis of panels of nucleic acid biomarkers offers valuable diagnostic and prognostic information for cancer management, A cost-effective, highly sensitive electronic chip would offer an ideal platform for clinical biomarker readout and would have maximal utility if it was (i) multiplexed, enabling on-chip assays of multiple biomarkers, and (ii) able to perform direct (PCR-free) readout of disease-related genes. Here we report a chip onto which we integrate novel nanostructured microelectrodes and with which we directly detect cancer biomarkers in heterogeneous biological samples-both cell extracts and tumor tissues. Coarse photolithographic microfabrication defines a multiplexed sensing array; bottom-up fabrication of nanostructured microelectrodes then provides sensing elements. We analyzed a panel of mRNA samples for prostate cancer related gene fusions using the chip. We accurately identified gene fusions that correlate with aggressive prostate cancer and distinguished these from fusions associated with slower-progressing forms of the disease. The multiplexed nanostructured microelectrode integrated circuit reported herein provides direct, amplification-free, sample-to-answer in under 1 h using the 10 ng of mRNA readily available in biopsy samples.
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