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Related Experiment Videos

Quantitative analysis of Her-2/neu (ERBB2) gene expression using reverse transcriptase polymerase chain reaction

F H Sarkar1, D W Visscher, J D Crissman

  • 1Department of Pathology, Wayne State University School of Medicine, Detroit, Michigan.

Diagnostic Molecular Pathology : the American Journal of Surgical Pathology, Part B
|September 1, 1993
PubMed
Summary

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This study introduces a sensitive method to measure Her-2/neu gene messenger RNA (mRNA) using reverse transcriptase polymerase chain reaction (RT-PCR). This technique accurately quantifies Her-2/neu mRNA in small clinical samples, correlating with protein levels.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • The Her-2/neu (ERBB2) gene's aberrant expression is linked to poor breast cancer prognosis and tumor progression.
  • Accurate quantification of gene expression is crucial for understanding cancer development and guiding treatment.
  • Existing methods may require larger sample sizes, limiting analysis in certain clinical scenarios.

Purpose of the Study:

  • To develop and validate a sensitive quantitative method for analyzing Her-2/neu gene mRNA expression.
  • To assess the applicability of this method to limited clinical breast cancer specimens.
  • To correlate mRNA expression levels with oncoprotein levels in patient samples.

Main Methods:

  • Development of a quantitative assay using reverse transcriptase polymerase chain reaction (RT-PCR).

Related Experiment Videos

  • Integration of modified RNA extraction and complementary DNA (cDNA) synthesis for enhanced sensitivity.
  • Application of the assay to cell lines with known gene expression and clinical human breast cancer tissues.

    • Main Results:

    • The RT-PCR based assay successfully quantified variable amounts of Her-2/neu mRNA in both cell lines and clinical samples.
    • High sensitivity was achieved, enabling analysis of small tissue sections (10-microns).
    • Quantified mRNA levels demonstrated a strong correlation with the intensity of immunoperoxidase staining for the Her-2/neu oncoprotein.

    Conclusions:

    • The described PCR-based method provides a reliable and sensitive approach for quantitative analysis of Her-2/neu gene expression.
    • This technique is suitable for analyzing gene expression in limited sample sizes, including clinical specimens.
    • The methodology holds potential for the quantitative analysis of other genes in various biological samples.