Comparing Methods for Detecting Blood Cells Related to Cancer
Author Information
Author(s): Michael Steurer, Johann Kern, Matthias Zitt, Albert Amberger, Monika Bauer, Günther Gastl, Gerold Untergasser, Eberhard Gunsilius
Primary Institution: Innsbruck Medical University
Hypothesis
Can a PCR-based detection method improve the monitoring of circulating endothelial and progenitor cells in cancer patients compared to flow cytometry?
Conclusion
QPCR is more sensitive but less specific than flow cytometry for detecting circulating endothelial and progenitor cells, and both methods failed to reliably detect an increase in these cells in tumor patients.
Supporting Evidence
- Flow cytometry detected spiked cells at frequencies of ≥ 0.01%, while qPCR achieved a detection limit of 0.001%.
- In patients with metastatic NSCLC, CD34 and KDR gene expression was significantly elevated compared to healthy controls.
- Both methods failed to reliably detect an increase of CEC/CEP in tumor patients.
Takeaway
This study looked at two ways to find special blood cells that might help us understand cancer better. One way was better at finding them, but both ways had trouble showing if cancer made these cells more common.
Methodology
The study compared flow cytometry and qPCR for detecting circulating endothelial and progenitor cells in blood samples from healthy volunteers and cancer patients.
Potential Biases
Potential bias due to the non-specificity of the markers used in both detection methods.
Limitations
The study lacked specific markers for endothelial cells, which limited the ability to distinguish these cells from other cell types.
Participant Demographics
Participants included 30 healthy volunteers, 20 patients with locally advanced rectal cancer, and 25 patients with metastatic non-small cell lung cancer.
Statistical Information
P-Value
p = 0.028 and p = 0.002
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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