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Related Experiment Video

Updated: Jan 21, 2026

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Biophysical Characterization of Aptamer-Target Interactions.

Maximilian Plach1, Thomas Schubert2

  • 12bind GmbH, Regensburg, Germany.

Advances in Biochemical Engineering/Biotechnology
|August 4, 2019
PubMed
Summary

Aptamers, or nucleic acid ligands, bind targets with high specificity. This review covers biophysical methods for characterizing aptamer-target interactions, crucial for diagnostics and therapeutics.

Keywords:
AffinityBinding parametersBiolayer InterferometryBiophysical characterizationEMSAFilter-Binding AssayFlow CytometryFluorescence PolarizationIsothermal Titration CalorimetryKineticsMicroScale ThermophoresisSurface Plasmon ResonanceSwitchSenseThermodynamics

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Biophysics

Background:

  • Aptamers are single-stranded nucleic acids with defined 3D structures.
  • They exhibit high affinity and specificity for diverse targets, including proteins, cells, and viruses.
  • Their applications span diagnostics and therapeutics, necessitating detailed biophysical characterization.

Purpose of the Study:

  • To provide an overview of current technologies for studying aptamer-target interactions.
  • To discuss the advantages and disadvantages of various biophysical characterization methods.
  • To address essential aspects of aptamer characterization strategies and data comparability.

Main Methods:

  • Review of state-of-the-art biophysical techniques for aptamer-target interaction analysis.
  • Discussion of methods for measuring binding affinity and kinetics.
  • Comparative analysis of different characterization technologies.

Main Results:

  • Aptamer-target binding parameters like affinity and kinetics are critical for applications.
  • Numerous biophysical methods exist, each with unique features and limitations.
  • Comparability of binding data across different technologies remains a challenge.

Conclusions:

  • Thorough biophysical characterization is essential for the successful application of aptamers.
  • Understanding the strengths and weaknesses of each method is key to selecting appropriate techniques.
  • Standardization and inter-method validation are crucial for reliable aptamer data.