PCR-free quantification of multiple splice variants in a cancer gene by surface-enhanced Raman spectroscopy.
PCR-free quantification of multiple splice variants in a cancer gene by surface-enhanced Raman spectroscopy.
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DOI:
10.1021/jp908225f
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发表时间:
2009-10-22
期刊:
影响因子:
--
通讯作者:
Irudayaraj J
中科院分区:
文献类型:
--
作者:
Sun L;Irudayaraj J
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 of DNA/RNA hybridization, S1 nuclease digestion, and alkaline hydrolysis was adopted to obtain DNA targets specific to two splice junction variants Δ(9, 10) and Δ(5) of the breast cancer susceptibility gene 1 (BRCA1) 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 variability in surface enhancement. Results were then validated by reverse transcription PCR (RT-PCR). Our proposed methodology could be expanded to a higher level of multiplexing for quantitative gene expression analysis of any gene without any amplification steps.
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