期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 113, 期 42, 页码 14021-14025出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp908225f
关键词
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资金
- CFSE [NIH-NC1 5RO3CA12134702]
- Bilsland Fellowship
- Purdue University
We demonstrate a surface-enhanced Raman spectroscopy (SERS) based array platform to monitor gene expression in cancer cells in a Multiplex and quantitative format without amplification steps. A strategy comprising DNA/RNA hybridization, SI nuclease digestion, and alkaline hydrolysis was adopted to obtain DNA targets specific to two splice junction variants, Delta(9, 10) and Delta(5), of the breast cancer susceptibility gene 1 from MCF-7 and MDA-MB-231 breast cancer cell lines. These two targets were identified simultaneously, and their absolute quantities were estimated by a SERS strategy utilizing the inherent plasmon-phonon Raman mode of gold nanoparticle probes as a self-referencing standard to correct for the variability in surface enhancement. The results were then validated by reverse-transcription polymerase chain reaction. Our proposed methodology could be expanded to a higher level of multiplexing for quantitative gene expression analysis of any gene without ail amplification steps.
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