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Colorectal Cancer Cell Surface Protein Profiling Using an Antibody Microarray and Fluorescence Multiplexing
Published on: September 25, 2011
Unique ectopic lymph node-like structures present in human primary colorectal carcinoma are identified by immune gene
Domenico Coppola1, Michael Nebozhyn, Farah Khalil
1Anatomic Pathology Division, Moffitt Cancer Center, Tampa, FL 33612-9497, USA.
The American Journal of Pathology
|June 28, 2011
Summary
Colorectal cancer with specific immune gene signatures forms ectopic lymph node-like structures. These structures, indicating a strong immune response, correlate with better patient survival and potential immunotherapy targets.
Area of Science:
- Oncology
- Immunology
- Genetics
Background:
- Colorectal carcinoma (CRC) exhibits diverse histological features.
- The role of immune cell infiltrates in CRC progression and prognosis is complex.
- Predictive biomarkers for CRC subtypes are crucial for personalized treatment.
Purpose of the Study:
- To investigate if immune gene signatures predict unique histological features in CRC.
- To determine the correlation between these features and clinical parameters.
- To explore the potential of these signatures as prognostic and therapeutic indicators.
Main Methods:
- Metagene analysis using gene chip technology on 326 colorectal carcinoma (CRC) samples.
- Microscopic examination of CRCs classified by high versus low immune gene scores.
- Immunohistochemical analysis for B-cell precursors (CD79a+), dendritic cells (CD21+), and T cells (CD3+).
Main Results:
- CRCs with high immune gene scores displayed organized lymphoid follicles with B and T cell proliferation.
- These follicles contained B-cell precursors, suggesting ectopic lymph node-like structures.
- A 12-chemokine gene subset strongly correlated with these structures and predicted better patient survival, independent of other clinical factors.
Conclusions:
- Immune gene signatures can identify tumor-localized, ectopic lymph node-like structures in CRC.
- These structures are associated with a beneficial intratumoral immune response and improved patient survival.
- Molecular signatures identifying these structures may guide immunotherapy decisions.
