Detection of pS2 and Cathepsin D in Breast Cancer
Author Information
Author(s): S. Marsigliante, L. Biscozzo, M. Correale, A. Paradiso, G. Leo, I. Abbate, C.D. Dragone, C. Storelli
Primary Institution: Universita di Lecce
Hypothesis
Is there a correlation between pS2 and cathepsin D levels in primary breast cancer biopsies?
Conclusion
The study found a significant association between pS2 and cathepsin D levels in lymph node-positive breast cancer patients.
Supporting Evidence
- pS2 and cathepsin D values were significantly associated in tumours from lymph node-positive patients.
- Cathepsin D concentrations were significantly higher in pS2-rich tumours.
- pS2 was correlated with both the oestrogen receptor and the progesterone receptor.
Takeaway
This study looked at breast cancer samples to see if two proteins, pS2 and cathepsin D, are related. They found that when one is high, the other tends to be high too, especially in patients with cancer that has spread to lymph nodes.
Methodology
The study used immunoradiometric assays to measure pS2 and cathepsin D in breast cancer tissue samples.
Potential Biases
Potential bias due to the arbitrary cut-off points used for pS2 classification.
Limitations
The study's findings may be limited by the interrelationship between pS2, ER, and PR, which complicates the analysis.
Participant Demographics
All participants were females aged 32 to 87, with a mean age of 56; 54% were post-menopausal.
Statistical Information
P-Value
p=0.00001
Statistical Significance
p<0.0001
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