Portable fluorescence-based microRNA detection system based on isothermal signal amplification technology

Area of Science:

• Biotechnology
• Molecular Diagnostics
• Cancer Research

Background:

• MicroRNA (miRNA) diagnostics are crucial for disease detection and monitoring.
• Traditional miRNA detection methods require specialized equipment and expertise, limiting their use in resource-limited settings.
• There is a need for rapid, affordable, and portable miRNA detection systems for point-of-care applications.

Purpose of the Study:

• To develop a portable and affordable fluorescence-based system for miRNA detection.
• To utilize isothermal signal amplification technology with SYBR Green II for sensitive detection.
• To validate the system's performance against real-time PCR and its utility in hepatocellular carcinoma (HCC) diagnosis.

Main Methods:

• Designed a portable fluorescence detection system using an LED light source and a custom optical path.
• Employed isothermal signal amplification with SYBR Green II for miRNA detection.
• Validated the system by detecting miR-183 in patient tissues and blood samples from hepatocellular carcinoma (HCC) cases.

Main Results:

• The portable system demonstrated results consistent with real-time PCR.
• Achieved a limit of detection of approximately 2 fmol for miR-183.
• Successfully identified hepatocellular carcinoma (HCC) using miR-183 fluorescence signals, correlating with cancer progression.

Conclusions:

• The developed portable system offers a rapid, affordable, and sensitive method for miRNA detection.
• This technology shows promise for point-of-care diagnostics, particularly for diseases like HCC.
• miR-183 detection using this system can aid in identifying HCC and assessing cancer progression.