The characterization and validation of 17β-estradiol binding aptamers

Area of Science:

• Biochemistry
• Analytical Chemistry
• Molecular Biology

Background:

• Small molecule detection is crucial and increasingly demands sensitive, rapid methods.
• Aptamers are promising alternatives to traditional antibody-based assays and chromatographic techniques.
• Characterizing aptamer-small molecule interactions requires efficient, high-throughput analysis.

Purpose of the Study:

• To develop and evaluate methodologies for analyzing aptamer-small molecule interactions.
• To assess aptamer binding properties, including affinity and specificity.
• To establish rapid, high-throughput techniques for aptamer characterization.

Main Methods:

• Microscale thermophoresis (MST) was employed to analyze binding kinetics.
• Apta-polymerase chain reaction (apta-PCR) was used for affinity measurements.
• Surface plasmon resonance (SPR) was utilized to evaluate binding properties.
• 17β-estradiol aptamers served as the model system for validation.

Main Results:

• The developed methodologies successfully characterized aptamer-small molecule interactions.
• MST, apta-PCR, and SPR demonstrated efficacy in assessing aptamer affinity and specificity.
• The study validated the use of these techniques for analyzing steroid aptamers.

Conclusions:

• Methodologies for evaluating aptamer-small molecule interactions were successfully established.
• Microscale thermophoresis, apta-PCR, and SPR are effective tools for rapid, high-throughput aptamer analysis.
• These techniques provide valuable insights into aptamer binding kinetics and affinity.