Development of Aptamer-Based TID Assays Using Thermophoresis and Microarrays

Area of Science:

• Biochemistry
• Molecular Biology
• Biotechnology

Background:

• Aptamers are single-stranded DNA or RNA molecules that bind targets with high affinity, similar to antibodies.
• Vascular Endothelial Growth Factor (VEGF) is a critical protein in angiogenesis and implicated in various diseases, including cancer, age-related macular degeneration, and diabetes.
• Accurate detection of VEGF is vital for medical research and diagnostics.

Purpose of the Study:

• To develop and validate a novel biosensing assay for detecting VEGF using aptamers.
• To investigate the application of aptamer-microarrays combined with target-induced dissociation (TID) for protein detection.
• To establish a systematic method for developing TID assays using VEGF as a model system.

Main Methods:

• Utilized aptamers specifically designed to bind VEGF.
• Developed a target-induced dissociation (TID) assay.
• Integrated aptamer-microarrays with thermophoresis for signal detection.

Main Results:

• Successfully established an aptamer-microarray system for VEGF detection.
• Achieved detection of VEGF at concentrations as low as 0.1 nM.
• Demonstrated the efficacy of the TID method using VEGF as a model.

Conclusions:

• The developed aptamer-microarray TID assay is a sensitive and effective method for detecting VEGF.
• This systematic approach provides a foundation for creating TID assays for other protein biomarkers.
• The findings have significant implications for advancing medical diagnostics and research.