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Related Experiment Videos

P63 expression in lung carcinoma: a tissue microarray study of 408 cases.

N H C Au1, A M Gown, M Cheang

  • 1Genetic Pathology Evaluation Centre, Department of Pathology and Prostate Research Centre, Vancouver General Hospital, the British Columbia Cancer Agency, Vancouver, British Columbia, Canada.

Applied Immunohistochemistry & Molecular Morphology : AIMM
|November 24, 2004
PubMed
Summary

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p63 protein is highly expressed in lung squamous cell carcinoma and also found in other lung tumor types. Its expression is significant in neuroendocrine tumors, indicating a broader role in lung cancer oncogenesis.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • p63, a p53 family member, is crucial for epithelial development.
  • p63 expression is elevated in squamous cell carcinomas of the lung, head and neck, and cervix.
  • Its role in diverse lung tumor types requires further investigation.

Purpose of the Study:

  • To investigate the expression patterns of p63 across various histologic types of primary lung tumors.
  • To assess the prognostic significance of p63 expression in different lung cancer subtypes.
  • To explore the correlation between p63 and p53 expression in lung tumors.

Main Methods:

  • Analysis of 408 primary lung tumors using tissue microarrays.
  • Immunohistochemistry with monoclonal antibody 4A4 for p63 detection.

Related Experiment Videos

  • Immunohistochemistry with monoclonal antibody DO-7 for p53 detection.
  • Kaplan-Meier survival analysis.

    • Main Results:

    • p63 was highly expressed in 96.9% of squamous cell carcinomas.
    • p63 expression was observed in 30% of adenocarcinomas and 37% of large cell carcinomas.
    • p63 expression increased with tumor grade in neuroendocrine tumors, with 76.9% of small cell carcinomas being positive.
    • p63 expression had prognostic significance in neuroendocrine tumors (P < 0.0001).
    • Correlation between p63 and p53 was found in neuroendocrine tumors (P < 0.0001) but not in non-small cell lung cancer (P = 0.18).

    Conclusions:

    • p63 is consistently expressed in lung squamous cell carcinoma and also present in subsets of adenocarcinomas and large cell carcinomas.
    • Pulmonary neuroendocrine tumors, especially higher-grade ones like small cell carcinoma, frequently express p63.
    • These findings suggest p63's involvement in the oncogenesis of a wider range of lung tumors than previously recognized.