Related Experiment Video
Updated: Apr 16, 2026
10:01
The Visual Colorimetric Detection of Multi-nucleotide Polymorphisms on a Pneumatic Droplet Manipulation Platform
Published on: September 27, 2016
8.0K
Single nucleotide polymorphism detection using gold nanoprobes and bio-microfluidic platform with embedded
Iwona Bernacka-Wojcik1, Hugo Águas, Fabio Ferreira Carlos
1Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, CENIMAT/I3N, Caparica, 2829-516, Portugal. ib@uninova.pt.
Biotechnology and Bioengineering
|March 14, 2015
Summary
This study introduces a novel bio-microfluidic platform with gold nanoprobe assays for detecting the FTO gene variant linked to obesity. The system offers improved sensitivity and reduced sample volume for precise molecular biosensing.
Area of Science:
- Biotechnology
- Nanotechnology
- Molecular Diagnostics
Background:
- Microfluidics and gold nanoparticles are key in molecular biosensing.
- Detecting genetic variants like FTO rs9939609 is crucial for obesity risk assessment.
Purpose of the Study:
- To develop and optimize a bio-microfluidic platform for sensitive detection of the FTO gene polymorphism.
- To enhance colorimetric gold nanoprobe assays for improved molecular detection.
Main Methods:
- Utilized a bio-microfluidic chip coupled with a non-cross-linking colorimetric gold nanoprobe assay.
- Incorporated planar microlenses and an optoelectronic acquisition system for signal enhancement.
- Integrated a miniature fiber spectrometer and optical microscopy for comprehensive analysis.
Main Results:
- Achieved significant discrimination of FTO rs9939609 DNA with 5 ng/µL, below the microplate reader limit.
- Reduced solution volume by 10-fold (3 µL) and improved colorimetric analysis by 160%.
- Enhanced signal-to-loss ratio by 6x with microlenses and improved accuracy with an optoelectronic system.
Conclusions:
- The optimized bio-microfluidic platform provides a sensitive, accurate, and efficient method for genetic variant detection.
- This approach holds promise for advancing molecular diagnostics and personalized risk assessment for obesity.
