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A Biofunctional Molecular Beacon for Detecting Single Base Mutations in Cancer Cells
Haiyan Dong1,2, Ji Ma1, Jie Wang1
1Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China.
A novel label-free multifunctional molecular beacon (LMMB) simplifies DNA detection for genetic disease therapy. This cost-effective biosensing system offers high sensitivity and rapid results, overcoming limitations of traditional methods.
Area of Science:
- Biotechnology
- Molecular Biology
- Genetic Engineering
Background:
- Developing convenient and sensitive biosensing systems for DNA detection is crucial for genetic disease therapy.
- Traditional molecular beacon (MB) methods face challenges like high cost, complex modifications, and operational difficulties.
Purpose of the Study:
- To develop a simple, cost-effective, label-free multifunctional molecular beacon (LMMB) for sensitive DNA detection.
- To integrate multiple DNA detection functionalities into a single molecular entity.
Main Methods:
- Designed LMMB incorporating primer, template, target recognition, and G-quadruplex elements.
- Utilized a G-hairpin structure for target DNA recognition and conformational changes.
- Employed isothermal circular strand-displacement polymerization for signal amplification and DNA extension.
Main Results:
- Achieved sensitive DNA detection with a limit of 250 pmol/L and a linear range of 2–100 nmol/L.
- Demonstrated ability to detect single-base mutations and differentiate between mutant and wild-type DNA.
- Completed preparation and assaying in just 25 minutes with a relative standard deviation of 7.98%.
Conclusions:
- The LMMB system offers a promising, efficient, and cost-effective approach for DNA and mutation detection.
- This technology has significant potential for advancing genetic disease diagnosis and therapy.
- The LMMB system overcomes limitations of conventional DNA detection methods, paving new avenues in biosensing.
