Visible Genotype Sensor Array

Area of Science:

• Genomics and Molecular Biology
• Biotechnology
• Sensor Technology

Background:

• Genotyping of single nucleotide polymorphisms (SNPs) is crucial for genetic research and diagnostics.
• Existing SNP genotyping methods can be time-consuming, require specialized equipment, or lack visual output.
• There is a need for accessible, rapid, and visually interpretable SNP genotyping systems.

Approach:

• Development of a visible sensor array system on a novel plastic base with specific surface chemistry.
• Utilizing allele-specific extension reactions with immobilized oligonucleotide primers modified with locked nucleic acid (LNA) for enhanced allelic discrimination.
• Employing biotin-dUTPs and alkaline phosphatase-mediated precipitation to generate visible colorimetric signals for direct observation and digital recording.

Key Points:

• Simultaneous multiple SNP genotyping is achieved with high efficiency.
• Locked nucleic acid modification of primers significantly improves allelic discrimination.
• Visible precipitates allow for naked-eye inspection and mobile phone-based digital recording of results.
• The system supports analysis of up to four individuals per array and can be performed within one hour.

Conclusions:

• The developed visible genotype sensor array offers a rapid, cost-effective, and user-friendly solution for SNP genotyping.
• This technology is well-suited for
• focused genomics
• applications, bridging the gap between comprehensive genomic studies and targeted genetic analysis.