Development of single-stranded DNA aptamers for specific Bisphenol a detection

Area of Science:

• Biotechnology
• Analytical Chemistry
• Environmental Science

Background:

• High-affinity and specific reagents are essential for detecting small molecules like toxicants.
• Aptamers, short single-stranded DNA (ssDNA) oligonucleotides, offer high affinity for target molecule recognition.

Purpose of the Study:

• To select and characterize ssDNA aptamers that specifically bind to Bisphenol A (BPA).
• To develop a novel aptamer-based detection method for BPA in environmental samples.

Main Methods:

• Systematic Evolution of Ligands by Exponential Enrichment (SELEX) process was employed to isolate BPA-binding aptamers.
• Selected aptamers were tested for specificity against structurally similar compounds.
• An aptamer-based sol-gel biochip was constructed for BPA detection.

Main Results:

• High-affinity ssDNA aptamers recognizing BPA were successfully selected from a large library.
• The selected aptamers demonstrated high specificity for BPA, distinguishing it from similar molecules like Bisphenol B.
• A functional aptamer-based sol-gel biochip was developed, enabling BPA detection in water.

Conclusions:

• Novel ssDNA aptamers with high affinity and specificity for BPA have been developed.
• The aptamer-based sol-gel biochip provides a sensitive platform for BPA detection.
• This approach holds potential for the universal, high-specificity detection of various small molecules.