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Related Experiment Videos

Quantitative PCR for hepatitis B virus with colorimetric detection

P Lehtovaara1, M Uusi-Oukari, P Buchert

  • 1Orion Corporation, Orion Pharmaceutica, Espoo, Finland.

PCR Methods and Applications
|December 1, 1993
PubMed
Summary

This study introduces a new colorimetric assay for precise hepatitis B virus (HBV) genome quantification. The method uses an internal standard for accuracy, enabling sensitive detection in clinical samples.

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Area of Science:

  • Molecular Biology
  • Virology
  • Biotechnology

Background:

  • Accurate quantification of hepatitis B virus (HBV) DNA is crucial for patient management and treatment monitoring.
  • Existing methods for HBV DNA quantification may suffer from variability and lack sensitivity.
  • A need exists for a robust and sensitive assay to determine the initial viral load in clinical samples.

Purpose of the Study:

  • To develop and validate a novel, sensitive colorimetric assay for the accurate quantification of hepatitis B virus (HBV) genomes.
  • To incorporate an internal standard (IS) for correcting amplification efficiency variability.
  • To establish a reliable method for determining the initial number of HBV genomes in clinical specimens.

Main Methods:

  • A novel colorimetric assay utilizing polymerase chain reaction (PCR) amplification of HBV genomes and a synthetic internal standard (IS).

Related Experiment Videos

  • Biotinylated primers were used to capture amplified DNA on streptavidin-coated microtiter plates.
  • Quantitative detection was achieved through hybridization with DNP-containing probes and subsequent immunoenzymatic detection.
  • The ratio of HBV to IS DNA was determined colorimetrically, with results interpreted using a standard curve.

    • Main Results:

    • The colorimetric assay demonstrated high sensitivity, quantifying as few as 15 HBV genomes from 10 microliters of serum.
    • The assay exhibited a wide dynamic range, from approximately 10(8) to over 10(11) DNA molecules.
    • The use of an internal standard ensured accurate correction for amplification efficiency variability.
    • The assay provided quantitative, rapid, and accurate results, with a dynamic range spanning five orders of magnitude.

    Conclusions:

    • The developed colorimetric assay offers a sensitive, accurate, and rapid method for quantifying initial hepatitis B virus (HBV) genome numbers.
    • The inclusion of an internal standard enhances the reliability of HBV DNA quantification in clinical samples.
    • This assay is suitable for automation and has a broad dynamic range, making it valuable for clinical diagnostics and research.