One-pot ligation-PCR for universal RNA biomarker detection

Area of Science:

• Molecular Biology
• Biochemistry
• Genomics

Background:

• Conventional RNA detection methods like reverse transcription-PCR (RT-PCR) and ligation-PCR have limitations.
• RT-PCR struggles with complex RNA targets, while ligation-PCR involves multi-step processes increasing contamination risk.
• Existing methods lack efficiency and precision for detecting RNA biomarkers, especially those with high sequence similarity.

Purpose of the Study:

• To develop an improved, one-pot ligation-PCR assay for sensitive and specific RNA biomarker detection.
• To overcome the limitations of conventional RT-PCR and two-step ligation-PCR workflows.
• To create a streamlined, closed-tube system for RNA analysis, reducing handling and contamination.

Main Methods:

• Developed a glyoxal-assisted one-pot ligation-PCR assay integrating probe ligation and PCR amplification.
• Utilized thermally responsive glyoxal-caged primers for controlled primer activation during PCR cycling.
• Validated the assay on mRNA splice variants and explored its application for microRNA detection.

Main Results:

• The one-pot assay demonstrated sensitivity comparable to conventional two-step ligation-PCR.
• Achieved significantly improved discrimination among closely related mRNA splice isoforms.
• Successfully extended the strategy for microRNA detection, showcasing its versatility.

Conclusions:

• The glyoxal-assisted one-pot ligation-PCR assay offers a simplified, robust, and efficient alternative for RNA biomarker detection.
• This streamlined approach minimizes operational complexity and contamination risk.
• The adaptable framework facilitates precise RNA analysis for various targets, including splice variants and microRNAs.