Tumor Infiltrating T Lymphocytes and Apoptosis in Colorectal Cancer
The Egyptian Journal of Immunology
|September 30, 2015
Summary
Colorectal cancer (CRC) may evade immune surveillance by causing the death of tumor-infiltrating lymphocytes (TILs). This study found significant T-lymphocyte apoptosis correlated with advanced CRC stages and patient age.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Immune system dysfunction in colorectal cancer (CRC) can stem from tumor-infiltrating lymphocytes (TILs) undergoing apoptosis.
- Understanding TILs' role is crucial for developing effective CRC immunotherapies.
Purpose of the Study:
- To investigate TILs in colorectal cancer.
- To characterize the apoptosis of TILs using TUNEL assay.
- To correlate TIL apoptosis with clinical parameters in CRC patients.
Main Methods:
- Detection of TILs using monoclonal antibodies against T lymphocytes.
- Assessment of apoptosis via double immunohistochemistry and TUNEL assay.
- Statistical analysis to correlate apoptosis with clinicopathological factors.
Main Results:
- T lymphocytes were identified within the immune infiltrate of CRC tissues.
- TUNEL staining revealed a high incidence of cell death among TILs.
- TIL apoptosis significantly correlated with Dukes' stage, lymphatic, vascular, and lymph node metastasis, and patient age (P < 0.05 for all).
Conclusions:
- Colorectal cancer may circumvent immunological surveillance by inducing apoptosis in TILs.
- Targeting TIL apoptosis could represent a novel therapeutic strategy for CRC.
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