A multistage volumetric bar chart chip for visualized quantification of DNA

Area of Science:

• Biotechnology
• Analytical Chemistry
• Molecular Diagnostics

Background:

• Nucleic acid detection is vital for disease diagnosis, environmental monitoring, and forensics.
• Existing DNA quantification methods often rely on expensive and complex instrumentation.
• There is a need for accessible, visualized DNA detection technologies.

Purpose of the Study:

• To develop a cost-effective, visualized method for multiplexed and quantitative DNA detection.
• To demonstrate the capability of the MV-Chip for sensitive DNA analysis.
• To overcome limitations of current DNA detection instrumentation.

Main Methods:

• Development of a multistage propelled volumetric bar chart chip (MV-Chip).
• Utilizing a platinum-catalyzed propulsion reaction for cascade amplification.
• Direct visual readout of ink bar charts without sophisticated equipment.
• Testing with single-nucleotide polymorphism and multiplex DNA detection.

Main Results:

• The MV-Chip achieved sensitive DNA detection down to 20 pM.
• The 'rocket-like' propelling reaction enabled cascade amplification.
• Visualized ink bar charts were directly readable by the naked eye.
• The method demonstrated minimal interference from serum components.

Conclusions:

• The MV-Chip provides a powerful, low-cost platform for quantitative DNA detection.
• This technology can be applied to various fields including diagnostics and environmental testing.
• Naked-eye visualization simplifies DNA analysis, enhancing accessibility.