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Magnetic-assisted rapid aptamer selection (MARAS) for generating high-affinity DNA aptamer using rotating magnetic
1Graduate Institute of Biomedical Engineering, National Chung Hsing University , Taichung, 402 Taiwan, R.O.C.
ACS Combinatorial Science
|May 13, 2014
Summary
A novel magnetic-assisted rapid aptamer selection (MARAS) method efficiently develops DNA aptamers. This technique generates high-affinity aptamers for C-reactive protein, a cardiovascular disease biomarker, with tunable binding capabilities.
Area of Science:
- Biotechnology
- Molecular Biology
- Biochemistry
Background:
- Aptamers are crucial for molecular diagnostics and therapeutics.
- Developing high-affinity and specific aptamers efficiently remains a challenge.
- C-reactive protein (CRP) is a key biomarker for cardiovascular diseases.
Purpose of the Study:
- To introduce a new DNA aptamer development protocol, magnetic-assisted rapid aptamer selection (MARAS).
- To demonstrate the MARAS protocol's efficiency in selecting high-affinity and specific aptamers.
- To investigate the tunability of aptamer binding affinities using MARAS.
Main Methods:
- The MARAS protocol utilizes magnetic beads and a rotating magnetic field for competitive aptamer selection.
- The method allows for the selection of aptamers with varying affinities towards a molecular target.
- DNA aptamers were generated and selected for C-reactive protein.
Main Results:
- The MARAS protocol successfully generated DNA aptamers with high affinity and specificity for C-reactive protein.
- Aptamer binding affinities were tunable by adjusting the frequency of the rotating magnetic field.
- Selected aptamers demonstrated low-nanomolar dissociation constants, indicating strong binding.
Conclusions:
- MARAS is an efficient and versatile SELEX protocol for DNA aptamer development.
- The protocol enables the generation of high-affinity aptamers with controllable binding characteristics.
- MARAS holds promise for developing novel diagnostic and therapeutic tools, particularly for cardiovascular disease biomarkers like CRP.
