Molecular Changes in Breast Ductal Carcinoma Before Morphological Alterations
Author Information
Author(s): Nadia P Castro, Cynthia A B Osório, César Torres, Elen P Bastos, Mário Mourão-Neto, Fernando A Soares, Helena P Brentani, Dirce M Carraro
Primary Institution: Centro de Pesquisa Hospital do Câncer A C Camargo, São Paulo, Brazil
Hypothesis
What molecular factors are necessary for the progression of ductal carcinoma in situ (DCIS) to invasive disease?
Conclusion
The study identifies new genes involved in the malignant transformation of DCIS, suggesting that molecular alterations occur before visible morphological changes.
Supporting Evidence
- Cells from pure DCIS exhibited the most divergent molecular profile.
- 147 genes were differentially expressed between pure DCIS and in situ component of lesions with co-existing invasive ductal carcinoma.
- LOX and SULF-1 were identified as potential participants in the malignant process of DCIS.
Takeaway
Researchers found that changes in the genes of breast cancer cells happen before the cells look different under a microscope, which could help predict which tumors might become more dangerous.
Methodology
The study used laser microdissection to isolate pure cell populations from various breast cancer samples and analyzed gene expression using microarray technology.
Limitations
The study was limited by the small number of pure DCIS samples available for analysis.
Participant Demographics
Patients had a mean age of 49 years, with no preoperative systemic treatment.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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