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Related Experiment Videos

p53 expression is common in malignant mesothelioma.

G Kafiri1, D M Thomas, N A Shepherd

  • 1Department of Histopathology, Royal Postgraduate Medical School, London, UK.

Histopathology
|October 1, 1992
PubMed
Summary

p53 protein detection can help distinguish malignant mesothelioma from reactive mesothelial proliferations. Most malignant mesotheliomas show p53 staining, while reactive cases do not, aiding diagnosis.

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Area of Science:

  • Oncology
  • Pathology
  • Molecular Biology

Background:

  • The p53 tumor suppressor gene is frequently mutated in human neoplasms.
  • Mutations in p53 lead to increased p53 protein levels, detectable in pathological samples.
  • Distinguishing malignant mesothelioma from reactive mesothelial proliferation can be challenging.

Purpose of the Study:

  • To evaluate the utility of p53 immunostaining in differentiating malignant mesothelioma from reactive mesothelial hyperplasia.
  • To determine the frequency of p53 abnormalities in malignant mesothelioma.

Main Methods:

  • Utilized a polyclonal antibody (CM-1) raised to human p53 protein for immunostaining.
  • Tested 20 cases of reactive mesothelial proliferation and 20 cases of malignant mesothelioma.

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  • Assessed p53 immunoreactivity in all tested samples.

    • Main Results:

    • None of the 20 reactive mesothelial proliferation cases showed p53 immunoreactivity.
    • 70% (14 out of 20) of malignant mesothelioma cases exhibited p53 staining.
    • p53 abnormalities appear common in malignant mesothelioma.

    Conclusions:

    • p53 immunostaining is a valuable tool for distinguishing malignant mesothelioma from reactive hyperplasia.
    • The differential diagnosis between neoplastic and reactive mesothelium can be improved using p53 detection.
    • Abnormalities of the p53 gene are a frequent event in the development of malignant mesothelioma.