Autoantibody Biomarkers in Colorectal Cancer Diagnostics
Summary
Autoantibody biomarkers harness the body’s humoral immune response to detect tumour-associated antigens released by colorectal neoplasms. As proteins aberrantly expressed or mutated in malignant cells enter circulation, they elicit the production of specific autoantibodies long before clinical symptoms arise. This immunological signature offers a minimally invasive route for early detection, risk stratification and monitoring of colorectal cancer. Panels of autoantibodies against multiple antigens improve sensitivity and specificity compared with single markers, addressing heterogeneity in tumour antigen expression. Technological advances, including high-density protein microarrays, electrochemical immunosensing and programmable protein arrays, enable simultaneous screening of dozens to hundreds of autoantibodies using small volumes of plasma. Integration of these platforms with statistical classifiers yields robust diagnostic algorithms, with performance metrics approaching those of established imaging and molecular assays. Globally, such approaches promise affordable population screening strategies, particularly in low-resource settings where endoscopic access is limited. Ongoing research aims to refine antigen panels, validate clinical utility in prospective cohorts and integrate autoantibody assays into multi-modal diagnostic pathways.
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Autoantibody Biomarkers in Colorectal Cancer Diagnostics publication trend
The graph below shows the total number of articles in autoantibody biomarkers in colorectal cancer diagnostics across all publications each year (not limited to Nature Index journals).
Technical terms
Autoantibody: An antibody produced by the immune system that recognises a self-derived antigen, in this context a protein aberrantly expressed by tumour cells.
Tumour-associated antigen (TAA): A protein selectively expressed or overexpressed by cancer cells that can provoke an immune response and serve as a biomarker target.
Electrochemical immunosensing: A detection technique in which antigen-antibody interactions on an electrode surface generate electrical signals proportional to analyte concentration.
Nucleic Acid Programmable Protein Array (NAPPArray): A high-density microarray technology that synthesises proteins in situ from DNA templates to present thousands of antigens for antibody screening.
Area under the curve (AUC): A performance metric for diagnostic tests, representing the probability that a randomly chosen positive sample ranks higher than a negative one; values closer to 1 indicate greater accuracy.
References
- Multiplexed monitoring of a novel autoantibody diagnostic signature of colorectal cancer using HaloTag technology-based electrochemical immunosensing platform. Theranostics (2020).
- Identification and Validation of Novel Serum Autoantibody Biomarkers for Early Detection of Colorectal Cancer and Advanced Adenoma. Frontiers in Oncology (2020).
- Tracking the Antibody Immunome in Sporadic Colorectal Cancer by Using Antigen Self-Assembled Protein Arrays. Cancers (2021).
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