RNA internal standard synthesis by nucleic acid sequence-based amplification for competitive quantitative...

Area of Science:

• Molecular Biology
• Biotechnology
• Nucleic Acid Amplification

Background:

• Nucleic Acid Sequence-Based Amplification (NASBA) allows for sequence synthesis via deletion and insertion.
• Quantitative analysis of nucleic acids often requires internal standards for accurate measurement.

Purpose of the Study:

• To develop a rapid method for synthesizing RNA internal standards using NASBA.
• To demonstrate the utility of these internal standards in competitive amplification reactions for quantitative analysis.

Main Methods:

• Two RNA internal standards were synthesized using sequential NASBA reactions with E. coli clpB mRNA as a model.
• Internal standards were designed to be amplifiable with wild-type primers but detectable via a unique inserted sequence.
• Verification of internal standards was performed using electrochemiluminescence and RNA lateral-flow biosensor analysis.

Main Results:

• Successfully synthesized two RNA internal standards using a novel NASBA-based construction method.
• Demonstrated the functionality of an internal standard in a competitive NASBA reaction with the wild-type sequence.
• The method proved effective without requiring traditional cloning or thermocyclers, completing in under 4 hours.

Conclusions:

• A rapid and efficient NASBA-based method for constructing RNA internal standards has been established.
• This technique offers significant advantages over traditional methods, including speed and reduced procedural complexity.
• The synthesized internal standards are suitable for quantitative analysis in competitive amplification assays.