Using Archived Breast Cancer Samples for Gene Profiling
Author Information
Author(s): Sadi Al Muktafi, Wang Dong-Yu, Youngson Bruce J, Miller Naomi, Boerner Scott, Done Susan J, Leong Wey L
Primary Institution: University Health Network
Hypothesis
Can gene profiling using archival formalin-fixed paraffin-embedded (FFPE) breast cancer specimens provide reliable prognostic information?
Conclusion
FFPE specimens retain important prognostic information that can be identified using recent gene profiling technology.
Supporting Evidence
- Over 80% of RNA samples from FFPE specimens were suitable for analysis.
- Gene profiles from FFPE samples correlated well with those from fresh samples.
- Specific gene expressions were linked to poor outcomes in breast cancer patients.
Takeaway
Researchers found that old breast cancer samples can still provide useful information about the disease, helping doctors predict how patients will do.
Methodology
RNA was extracted from FFPE samples and analyzed using a modified DASL assay and RT-qPCR to compare gene expression profiles with fresh samples.
Potential Biases
Potential bias due to the selection of samples and the inherent degradation of RNA in FFPE specimens.
Limitations
The study was limited by the degradation of RNA in FFPE samples, which may affect the accuracy of gene expression data.
Participant Demographics
The study included 39 breast cancer cases with varying ER and Her2 status.
Statistical Information
P-Value
0.0005
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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