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Related Experiment Videos

Development of an improved product enhanced reverse transcriptase assay

A Chang1, J M Ostrove, R E Bird

  • 1Microbiological Associates, Rockville, MD 20850, USA. achang@microbio.com

Journal of Virological Methods
|April 1, 1997
PubMed
Summary

A new reverse transcriptase (RT) assay offers 10,000x greater sensitivity than traditional methods. This enhanced assay accurately detects authentic RT activity while distinguishing it from false positives caused by cellular polymerases.

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Virology

Background:

  • Reverse transcriptase (RT) assays are crucial for detecting retroviruses and other RNA viruses.
  • Conventional assays lack sensitivity and are prone to false positives from cellular polymerases.
  • Recent advancements utilize polymerase chain reaction (PCR) for enhanced sensitivity in RT detection.

Purpose of the Study:

  • To develop a highly sensitive and specific reverse transcriptase assay.
  • To differentiate authentic RT activity from false positives generated by cellular polymerases.
  • To improve upon existing sensitive RT detection methods.

Main Methods:

  • Developed a PCR-based reverse transcriptase (RT) assay.
  • Utilized MS2 bacteriophage RNA template and specific primers.

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  • Optimized RT reaction conditions: lowered pH to 5.5, 1-hour incubation, and addition of protease inhibitors.
  • Employed high-resolution agarose gel electrophoresis for sensitive endpoint detection.

    • Main Results:

    • Achieved 10^4-fold higher sensitivity compared to conventional nucleotide incorporation assays.
    • Successfully discriminated between authentic RT activity and false positives from cellular polymerases.
    • Maintained high sensitivity without compromising detection limits using agarose gel electrophoresis.

    Conclusions:

    • The developed assay provides a significant advancement in sensitivity and specificity for RT detection.
    • This method effectively mitigates false positive results, enhancing diagnostic and research reliability.
    • The optimized assay is a valuable tool for detecting RNA viruses and studying RT activity.