Next-Generation Nucleic Acid Aptamers with Two-Base-Modified Nucleotides Have Improved Binding Affinity and Potency.

Area of Science:

• Biotechnology
• Molecular Biology
• Nucleic Acid Chemistry

Background:

• Nucleic acid aptamers are crucial in diagnostics and therapeutics.
• Existing aptamers often face limitations in stability and binding characteristics.
• Development of aptamers with superior properties is an ongoing research area.

Purpose of the Study:

• To engineer novel nucleic acid aptamers with improved binding affinity and specificity.
• To enhance the epitope coverage and nuclease resistance of aptamers.
• To explore the impact of specific base modifications on aptamer performance.

Main Methods:

• Utilized oligonucleotide libraries for aptamer development.
• Incorporated modifications at two bases within the pyrimidine nucleotide.
• Screened and characterized modified aptamers for binding affinity, specificity, and nuclease resistance.

Main Results:

• Developed aptamers exhibiting significantly higher binding affinity compared to unmodified counterparts.
• Achieved enhanced specificity, ensuring precise target recognition.
• Demonstrated superior nuclease resistance and broader epitope coverage.

Conclusions:

• The developed modified nucleic acid aptamers possess enhanced functional properties.
• Pyrimidine base modification is an effective strategy for improving aptamer performance.
• These aptamers hold promise for advanced applications in biotechnology and medicine.