Assembly-disassembly of DNAs and gold nanoparticles: A strategy of intervention based on oligonucleotides and restriction enzymes

I. Im S. Lim, Uma Chandrachud, Lingyan Wang, Susannah Gal, Chuan Jian Zhong

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The ability to manipulate and intervene in the processes of assembly and disassembly of DNAs and nanoparticles is important for the exploitation of nanoparticles in medical diagnostics and drug delivery. This report describes the results of an investigation of a strategy to intervene in the assembly and disassembly processes of DNAs and gold nanoparticles based on two approaches. The first approach explores the viability of molecular intervention to the assembly-disassembly-reassembly process. The temperature-induced assembly and disassembly processes of DNAs and gold nanoparticles were studied as a model system to illustrate this approach. The introduction of a molecular recognition probe leads to intervention in the assembly-disassembly process depending on its specific biorecognition. This process was detected by monitoring the change in the optical properties of gold nanoparticles and their DNA assemblies. The second approach involves the disassembly of the DNA-linked assembly of nanoparticles using restriction enzymes (e.g., MspI). The presence of the double stranded DNAs in the nanoparticle assembly was also substantiated by a Southern blot. Implications of the results to exploration of the molecular intervention for fine-tuning interfacial reactivities in DNA-based bioassays are also discussed.

Original languageEnglish (US)
Pages (from-to)6038-6044
Number of pages7
JournalAnalytical chemistry
Volume80
Issue number15
DOIs
StatePublished - Aug 1 2008

Fingerprint

Oligonucleotides
Gold
Nanoparticles
DNA
Enzymes
Molecular recognition
Bioassay
Drug delivery
Optical properties
Tuning
Monitoring

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

Lim, I. Im S. ; Chandrachud, Uma ; Wang, Lingyan ; Gal, Susannah ; Zhong, Chuan Jian. / Assembly-disassembly of DNAs and gold nanoparticles : A strategy of intervention based on oligonucleotides and restriction enzymes. In: Analytical chemistry. 2008 ; Vol. 80, No. 15. pp. 6038-6044.
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Assembly-disassembly of DNAs and gold nanoparticles : A strategy of intervention based on oligonucleotides and restriction enzymes. / Lim, I. Im S.; Chandrachud, Uma; Wang, Lingyan; Gal, Susannah; Zhong, Chuan Jian.

In: Analytical chemistry, Vol. 80, No. 15, 01.08.2008, p. 6038-6044.

Research output: Contribution to journalArticle

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