Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (10): 1965.

• Articles • Previous Articles     Next Articles

Label-free Colorimetric Assay Based on Gold Nanoparticles in Detection of NOS1AP with Single Nucleotide Polymorphism

GUO Qing-Chuan1,2, WANG Xiang1, LOU Xin-Hui1, MAO Hong-Ju1*, JIA Jie3*, JIN Qing-Hui1, ZHAO Jian-Long1, ZHANG Feng3   

  1. 1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
    2. Department of Rehabilitation, Third Hospital, Xinxiang Medical College, Xinxiang 453003, China;
    3. Department of Rehabilitation, Huashan Hospital, Fudan University, Shanghai 200040, China
  • Received:2009-12-30 Online:2010-10-10 Published:2010-10-10
  • Contact: MAO Hong-Ju, E-mail: hjmao@mail.sim.ac.cn; JIA Jie, E-mail: drjiajie@163.com
  • Supported by:

    国家重大科学计划项目(批准号: 2009ZX10004-105)和上海市科委纳米专项基金(批准号: 0952nm05700)资助.

Abstract: A gold nanoparticles’ colorimetry-based assay for detection of NOS1AP gene with single nucleotide polymorphism was established, which profited from the dissimilar electrostatic interactions between single-stranded oligonucleotides and double-stranded oligonucleotides. The detection probes, the oligonucleotides with their perfectly complementary sequence, and the sequence with a single mismatched base were designed according to the NOS1AP gene sequence. The detection probes were hybridized with their complementary oligonucleotides and single-base-mismatch oligonucleotides, respectively. Then, gold nanoparticles solutions and NaCl solutions were added, respectively. Different color appeared obviously by naked eye which showed an evident change in UV-Vis absorption spectroscopy similarly. The results indicate that with the presence of the appropriate concentration of NaCl, the gold nanoparticles solutions with double-stranded oligonucleotides are distinguished from gold nanoparticles solutions with single mismatched oligonucleotides by colormetric assay. This method enables a simple, rapid and efficient detection that could have potential and possible application prospects in medical diagnosis.

Key words: Gold nanoparticle, NOS1AP, Single nucleotide polymorphism, Colorimetric assay

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