Recent advances in rolling circle amplification-based biosensing strategies-A review

Area of Science:

• Molecular Biology
• Biotechnology
• Biochemistry

Background:

• Rolling circle amplification (RCA) is an isothermal enzymatic reaction that amplifies circular nucleic acid templates.
• It mimics natural rolling circle replication, producing long tandem DNA or RNA strands without thermal cycling.
• RCA offers advantages over other amplification methods, including high specificity, sensitivity, and customizable product generation.

Purpose of the Study:

• To provide a comprehensive overview of Rolling Circle Amplification (RCA) technology.
• To summarize RCA principles based on initiation, amplification, and signal output modes.
• To discuss the recent applications of RCA-based biosensors for biomarker detection.

Main Methods:

• Review of fundamental principles of Rolling Circle Amplification (RCA).
• Categorization of RCA based on initiation, amplification, and signal output modes.
• Analysis of recent literature on RCA-based biosensor applications.

Main Results:

• RCA provides high specificity due to padlock probe ligation, enabling single base mismatch detection.
• Exponential amplification and high sensitivity are achievable by introducing multiple primers.
• RCA products can be engineered to create functional nucleic acids like aptamers and DNAzymes.
• The reaction's biocompatibility makes it suitable for in situ detection.

Conclusions:

• Rolling Circle Amplification (RCA) is a versatile and efficient tool for molecular biology.
• Its high specificity, sensitivity, and adaptability make it ideal for developing advanced biosensors.
• RCA shows significant potential for highly sensitive biomarker detection and in situ diagnostics.