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Published on: February 28, 2015
Aptamer/AuNP Biosensor for Colorimetric Profiling of Exosomal Proteins
Ying Jiang1,2, Muling Shi1,2, Yuan Liu1,2
1Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Life Sciences, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan, 410082, China.
This study introduces a novel sensor for rapid, naked-eye detection of cancer biomarkers on exosomes. The platform uses gold nanoparticles and aptamers to identify exosome surface proteins, aiding in cancer diagnosis.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cancer Diagnostics
Background:
- Exosomes are valuable biomarkers for cancer diagnosis due to their carried proteins.
- Profiling exosome surface proteins is crucial for identifying diagnostic marker combinations.
- Current methods for exosome analysis can be time-consuming.
Purpose of the Study:
- To develop a rapid, naked-eye sensor platform for profiling exosome surface proteins.
- To enable quick identification of multiple protein biomarkers on exosomes for cancer diagnosis.
Main Methods:
- A sensor platform utilizing gold nanoparticles (AuNPs) complexed with aptamers was designed.
- Aptamer-AuNP complexation prevents aggregation in high-salt solutions.
- Exosomes disrupt aptamer-AuNP binding, causing AuNP aggregation and a visible color change.
Main Results:
- The sensor platform successfully profiles exosome surface proteins within minutes.
- The system allows for naked-eye identification of protein patterns indicative of exosomes.
- This method facilitates the detection of multiple exosome surface proteins simultaneously.
Conclusions:
- The developed sensor offers a fast and accessible method for exosome surface protein profiling.
- This technology has significant potential for early cancer diagnosis and biomarker discovery.
- The naked-eye detection capability makes the platform suitable for various diagnostic settings.
