Gamma-delta T Cells in Bladder Cancer Draining Lymph Nodes

Area of Science:

• Immunology
• Oncology
• Cell Biology

Background:

• Gamma-delta (γδ) T cells are a unique T cell subset recognizing stress-induced molecules on cancer cells.
• Their cytokine production and immune cell interactions highlight potential in cancer immunotherapy.

Purpose of the Study:

• To determine the frequency of γδ T cells in tumor-draining lymph nodes of bladder cancer patients.
• To assess the association between γδ T cells and bladder cancer prognostic factors.

Main Methods:

• Single-cell suspension from 49 lymph nodes of untreated bladder cancer patients.
• Flow cytometry using anti-CD3, anti-TCRγδ, and anti-HLA-DR antibodies.
• Analysis of γδ T cell frequency and HLA-DR expression.

Main Results:

• γδ T cells constituted 2.07% of CD3+ lymphocytes; 37.90% expressed HLA-DR.
• No significant variation in total γδ T cell frequency across prognoses.
• Higher HLA-DR+ γδ T cell frequency in T4 vs. T2 stages (p=0.031) and a trend in Stage III vs. II (p=0.077).

Conclusions:

• HLA-DR expressing γδ T cells correlate with bladder cancer progression markers (higher T-stage and stage).
• These findings suggest a potential role for HLA-DR+ γδ T cells in bladder cancer progression.
• Further longitudinal studies are required to validate these results and clarify the functional role of γδ T cells in bladder cancer immunity.