Multiplexed microRNA Detection Using Metal-Organic Framework for Signal Output

Area of Science:

• Biochemistry
• Materials Science
• Analytical Chemistry

Background:

• MicroRNAs (miRNAs) play crucial roles in gene regulation.
• Developing sensitive and specific detection methods for miRNAs is essential for biological research and diagnostics.
• Existing methods often face challenges with specificity, sensitivity, or multiplexing capabilities.

Purpose of the Study:

• To develop a novel fluorescence platform for sequence-specific microRNA (miRNA) detection.
• To utilize fluorophore-labeled DNA and metal-organic frameworks (MOFs) for enhanced miRNA sensing.
• To achieve simultaneous detection of multiple miRNAs with high specificity and sensitivity.

Main Methods:

• A fluorescence platform was designed using fluorophore-labeled single-strand oligodeoxynucleotides (ssODNs) and a specific metal-organic framework, Ni-IRMOF-74-II.
• Ni-IRMOF-74-II was employed to quench the fluorescence of the labeled ssODNs.
• Fluorescence recovery upon binding of target miRNAs was monitored in specific detection channels.

Main Results:

• The developed platform demonstrated effective quenching of fluorescence by Ni-IRMOF-74-II.
• Specific fluorescence recovery was observed in the presence of target miRNAs, enabling their detection.
• A linear relationship was established between recovered fluorescence intensity and miRNA concentration (1.25–100 nM).
• The platform successfully detected multiple miRNAs simultaneously with high specificity and minimal cross-reactivity.

Conclusions:

• The developed fluorescence sensor platform provides a robust method for sequence-specific miRNA detection.
• The use of MOFs offers a promising strategy for sensitive and multiplexed miRNA analysis.
• This platform holds potential for various applications in biological research and diagnostics requiring precise miRNA quantification.