Surface Plasmon Resonance Detection of Transgenic Cry1Ac Cotton (Gossypium spp.)
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- 作者：Zhuoya Zhao ; Yanshan Chen ; Wenzhong Xu ; Mi Ma
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2013
- 出版时间：March 27, 2013
- 年：2013
- 卷：61
- 期：12
- 页码：2964-2969
- 全文大小：234K
- 年卷期：v.61,no.12(March 27, 2013)
- ISSN：1520-5118
文摘
The detection and identification of genetically modified (GM) plants are challenging issues that have arisen from the potential negative impacts of extensive cultivation of transgenic plants. The screening process is a long-term focus and needs specific detection strategies. Surface plasmon resonance (SPR) has been used to detect a variety of biomolecules including proteins and nucleic acids due to its ability to monitor specific intermolecular interactions. In the present study, two high-throughput, label-free, and specific methods based on SPR technology were developed to detect transgenic Cry1Ac cotton (Gossypium spp.) by separately targeting protein and DNA. In the protein-based detection system, monoclonal anti-Cry1Ac antibodies were immobilized on the surface of a CM5 sensor chip. Conventional cotton samples were used to define the detection threshold. Transgenic cotton was easily identified within 5 min per sample. For the DNA-based model, a 25-mer biotinylated oligonucleotide probe was immobilized on an SA sensor chip. PCR products of Cry1Ac (230 bp) were used to investigate the reaction conditions. The sensitivity of the constructed sensor chip was identified at concentrations as low as 0.1 nM based on its complementary base pairing.