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Related Experiment Videos

Cyclin E expression, a potential prognostic marker for non-small cell lung cancers.

T Mishina1, H Dosaka-Akita, F Hommura

  • 1First Department of Medicine, Hokkaido University School of Medicine, Japan.

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
|February 3, 2000
PubMed
Summary

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High cyclin E expression in non-small cell lung cancers (NSCLCs) is linked to smoking and squamous cell type. This elevated cyclin E indicates a poorer prognosis and shorter survival for NSCLC patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Cyclin E regulates the G1-S cell cycle transition.
  • Dysregulation of cyclin E is implicated in tumorigenesis.
  • Non-small cell lung cancer (NSCLC) is a major cause of cancer mortality.

Purpose of the Study:

  • To characterize cyclin E expression in NSCLC.
  • To investigate the correlation between cyclin E expression and clinicopathological features.
  • To evaluate the prognostic significance of cyclin E in NSCLC.

Main Methods:

  • Immunohistochemistry was used to assess cyclin E expression in 217 NSCLC samples.
  • Statistical analyses, including chi-squared test, logistic regression, and Cox proportional hazards model, were employed.

Related Experiment Videos

  • Correlation with patient survival and clinicopathological factors was analyzed.

    • Main Results:

    • High-level cyclin E expression (≥30% labeling index) was observed in 53% of NSCLCs.
    • Elevated cyclin E was associated with smoking history (P=0.001), squamous cell carcinoma (P=0.0002), and advanced tumor stage (pT2-4, P=0.04).
    • High cyclin E expression correlated with significantly shorter patient survival in both curatively resected NSCLCs and stage I NSCLCs (P=0.03 and P=0.007, respectively).

    Conclusions:

    • High-level cyclin E expression is a significant and independent unfavorable prognostic factor in NSCLC.
    • Cyclin E may play a critical role in the biological behavior of NSCLCs.
    • Elevated cyclin E expression could serve as a novel prognostic marker for NSCLC.