Cathepsin-D and Breast Cancer Prognosis
Author Information
Author(s): J.H.R. Winstanley, S.J. Leinster, T.G. Cooke, B.R. Westley, A.M. Platt-Higgins, P.S. Rudland
Primary Institution: University of Liverpool Medical School
Hypothesis
Does the expression of cathepsin-D in breast cancer tissues correlate with patient survival outcomes?
Conclusion
Higher levels of cathepsin-D expression are associated with poorer survival in breast cancer patients.
Supporting Evidence
- 35% of patients showed strong cathepsin-D staining.
- Patients with cathepsin-D positive tumors had a median survival of 147 months compared to 180 months for negative tumors.
- The presence of cathepsin-D was significantly associated with axillary lymph node involvement.
Takeaway
This study found that patients with higher levels of a protein called cathepsin-D in their breast cancer tissues tend to live for a shorter time.
Methodology
The study used immunohistochemical techniques to evaluate cathepsin-D expression in paraffin-embedded tissue samples from breast cancer patients.
Potential Biases
Potential interobserver variability in staining assessment could affect results.
Limitations
The study's findings may be influenced by the presence of other prognostic factors and the variability in staining assessment.
Participant Demographics
Patients had a mean age of 57 years, with a range from 29 to 92 years.
Statistical Information
P-Value
0.025
Statistical Significance
p<0.05
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