Early Changes in Breast Cancer After Chemotherapy
Author Information
Author(s): Caroline D. Archer, Mark Parton, Ian E. Smith, Paul A. Ellis, James Salter, Simon Ashley, Guang Gui, Neil Sacks, Sarah R. Ebbs, William Allum, Nazanin Nasiri, Michael Dowsett
Primary Institution: Royal Marsden NHS Trust
Hypothesis
Can early changes in apoptosis and proliferation after chemotherapy predict clinical response in breast cancer patients?
Conclusion
The study found that while there were significant changes in apoptosis and proliferation after 24 hours of chemotherapy, these changes did not correlate with clinical response.
Supporting Evidence
- 66 patients had sufficient invasive tissue for analysis.
- 86% of patients responded to treatment.
- Significant increase in apoptosis was observed 24 hours after chemotherapy.
Takeaway
Doctors looked at how breast cancer cells changed after chemotherapy to see if it could help predict how well the treatment would work, but they found it didn't really help.
Methodology
Patients with nonmetastatic primary breast cancer received chemotherapy and had core biopsies taken before and 24 hours after treatment to analyze changes in apoptosis and proliferation.
Potential Biases
Sampling bias due to the need for sufficient tissue for analysis may affect the results.
Limitations
The study had a small sample size and only 62% of patients had enough tissue for analysis, which may limit the applicability of the findings.
Participant Demographics
{"age":{"median":48,"range":"32-63"},"menopausal_status":{"premenopausal":39,"perimenopausal":3,"postmenopausal":24},"tumor_stage":{"T-2":29,"T-3":26,"T-4 operable":1,"T-4 inoperable":10},"tumor_size":{"median":5.7,"range":"3-20"},"histology":{"ductal":56,"lobular":8,"ductal+lobular":1,"mucinous":1},"grade":{"grade_1":0,"grade_2":29,"grade_3":34,"unknown":3},"ER_status":{"positive":43,"negative":23},"HER2_status":{"positive":18,"negative":48}}
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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