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Related Experiment Videos

Apoptosis during breast carcinoma progression.

M Vakkala1, K Lähteenmäki, H Raunio

  • 1Department of Pathology, University of Oulu and Oulu University Hospital, Finland.

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
|February 26, 1999
PubMed
Summary

Increased apoptosis and proliferation in recurrent breast cancer correlate with worse patient survival. This finding highlights apoptosis as a key indicator of poor prognosis in advanced breast carcinoma, especially in recurrent lesions.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Pathology

Background:

  • Breast carcinoma progression involves complex cellular changes.
  • Understanding apoptosis and proliferation is crucial for predicting patient outcomes.
  • Estrogen and progesterone receptor status are key factors in breast cancer.

Purpose of the Study:

  • To investigate apoptosis, proliferation, and key protein expression in breast carcinoma progression.
  • To analyze the relationship between these factors and patient survival.
  • To examine changes from primary to recurrent tumors.

Main Methods:

  • Studied 53 paired primary and recurrent breast carcinoma samples and 24 controls.
  • Assessed apoptosis morphologically and via DNA fragmentation.

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  • Evaluated cell proliferation using the MIB index.
  • Quantified bcl-2, bax, estrogen, and progesterone receptor expression immunohistochemically.

    • Main Results:

    • Recurrent tumors showed significantly increased apoptosis and proliferation compared to primary tumors.
    • Higher apoptotic index in primary tumors correlated with shorter patient survival.
    • Increased apoptosis or proliferation in recurrent tumors predicted significantly shorter survival.
    • bcl-2 expression and positive estrogen receptor status were linked to lower apoptosis levels.

    Conclusions:

    • Increased apoptosis is associated with a worse prognosis in breast carcinoma.
    • Elevated apoptosis in recurrent breast cancer lesions indicates a poorer clinical outcome.
    • Apoptosis and proliferation markers are important prognostic indicators in breast cancer progression.