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Solid-Phase Nucleic Acid Sequence-Based Amplification and Length-Scale Effects during RNA Amplification.

Youlong Ma1, Feiyue Teng1, Matthew Libera1

  • 1Department of Chemical Engineering and Materials Science , Stevens Institute of Technology , Hoboken , New Jersey 07030 , United States.

Analytical Chemistry
|April 14, 2018
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Solid-phase nucleic acid sequence-based amplification (SP-NASBA) was developed to improve next-generation sequencing and diagnostics. Amplification efficiency decreases with higher tethering density due to probe hybridization and enzyme activity limitations.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Nanotechnology

Background:

  • Solid-phase oligonucleotide amplification offers potential for advanced applications like next-generation sequencing and diagnostics.
  • Current solid-phase methods face efficiency challenges compared to traditional liquid-phase amplification.

Purpose of the Study:

  • To demonstrate solid-phase nucleic acid sequence-based amplification (SP-NASBA).
  • To investigate the impact of tethering density on SP-NASBA efficiency.

Main Methods:

  • Developed SP-NASBA using avian myeloblastosis virus reverse transcriptase (AMV-RT), RNase H, and T7 RNA polymerase.
  • Created microgels on silicon surfaces via electron-beam patterning of poly(ethylene glycol) blends.
  • Tethered primers and molecular beacon probes to streptavidin-activated microgels, controlling density via PEG-B concentration.

Main Results:

  • SP-NASBA demonstrated high efficiency at low tethering densities.
  • Amplification efficiency significantly decreased as tethering density increased.
  • Reduced probe hybridization and T7 RNA polymerase efficiency were identified as key limiting factors.

Conclusions:

  • SP-NASBA is a viable method for solid-phase amplification.
  • Tethering density critically influences SP-NASBA efficiency, with optimal performance at lower densities.
  • Further optimization is needed to overcome limitations associated with high tethering densities.