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Noninvasive Detection of Colorectal Carcinomas Using Serum Protein Biomarkers
Melanie M Ivancic1, Bryant W Megna2, Yuriy Sverchkov3
1University of Wisconsin-Madison Biotechnology Center, Madison, Wisconsin; Department of Oncology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin; Department of Biochemistry, University of Wisconsin, Madison, Wisconsin.
A new blood test using mass spectrometry shows promise for detecting colorectal cancer (CRC) with high sensitivity and specificity. This minimally invasive test could improve early detection and staging of CRC.
Area of Science:
- Oncology
- Biomarker Discovery
- Proteomics
Background:
- Colorectal cancer (CRC) mortality remains high due to delayed detection and treatment.
- Current CRC detection methods have limitations in patient compliance.
- A simple blood test offers a potential solution for improved CRC screening.
Purpose of the Study:
- To evaluate the utility of a mass spectrometry-based blood serum protein biomarker test for CRC detection.
- To identify specific protein biomarkers predictive of CRC.
- To assess the potential of these biomarkers for cancer staging.
Main Methods:
- Serum samples were collected from individuals undergoing colonoscopy and CRC patients.
- Proteins were isolated using targeted liquid chromatography-tandem mass spectrometry.
- A machine-learning statistical model was developed to analyze protein data.
Main Results:
- Individual biomarkers showed over 70% significance in distinguishing CRC cases from cancer-free cases.
- A five-marker panel achieved 89% sensitivity and 70% specificity for CRC detection (AUC=0.86).
- A four-marker panel showed potential for distinguishing localized from regional CRC (AUC=0.75).
Conclusions:
- Minimally invasive blood biomarker panels can serve as alternative screening and detection methods for CRC.
- These panels may also be useful for staging existing colorectal cancer.
- The findings support the development of blood-based tests for improved CRC management.
