Multiplexed detection of nucleic acids in a combinatorial screening chip

Area of Science:

• Biotechnology
• Molecular Diagnostics
• Microfluidics

Background:

• Current diagnostic tests often analyze single markers, increasing time and cost.
• Multiplexed testing offers improved efficiency for disease diagnosis and treatment decisions.
• Developing parallel screening for infectious disease markers is crucial for global health.

Purpose of the Study:

• To develop and validate a microfluidic chip for multiplexed nucleic acid detection.
• To demonstrate simultaneous screening of multiple viral disease markers using molecular beacons and TIRFM.
• To establish a versatile platform for advanced clinical diagnostics.

Main Methods:

• Utilized a microfluidic chip with a 4x4 array of 200 pL wells.
• Employed molecular beacons and total internal reflection fluorescence microscopy (TIRFM) for detection.
• Screened for four viral targets: human immunodeficiency virus-1 (HIV-1), human papillomavirus (HPV), Hepatitis A (Hep A), and Hepatitis B (Hep B).

Main Results:

• Accurate detection and discrimination of target oligonucleotides against non-target sequences.
• Successful multiplexed detection of four common viral nucleic acid markers.
• Demonstrated the capability of the microfluidic platform for simultaneous screening.

Conclusions:

• The developed combinatorial chip is a versatile platform for multiplexed diagnostic testing.
• This approach enables simultaneous screening, detection, and monitoring of diverse disease markers.
• The technology has the potential to significantly advance clinical diagnostics using minimal sample volumes.