Dendritic cells in esophageal cancer and lymph node tissues

Area of Science:

• Oncology
• Immunology
• Pathology

Background:

• Dendritic cells (DCs) play a crucial role in immune responses within the tumor microenvironment.
• Understanding DC infiltration patterns in esophageal cancer is important for prognosis and treatment strategies.

Purpose of the Study:

• To investigate the density and types of dendritic cells (DCs) in esophageal dysplastic and cancerous lesions.
• To correlate DC infiltration with clinicopathological features and preoperative radiotherapy.

Main Methods:

• Immunohistochemical staining of S-100 protein, CD1, and L-M2 on histological and cryostat sections.
• Analysis of Langerhans cells (LCs) and interdigitating cells (IDCs) proportions in different grades of squamous cell carcinoma (SCC).
• Morphometrical analysis of lymph node hyperplasia in relation to cancer metastasis.

Main Results:

• No significant correlation between S-100+ DCs and dysplasia grade, tumor differentiation, invasion depth, or lymph node metastasis.
• Preoperative radiotherapy significantly decreased S-100+ DC numbers.
• Poorly differentiated SCC had significantly more DCs than well-differentiated SCC.
• LCs and IDCs proportions varied with SCC differentiation, with IDCs dominating in poorly differentiated types.
• Lymph nodes with metastasis showed altered hyperplasia patterns and increased S-100+ IDCs.

Conclusions:

• Preoperative radiotherapy impacts DC infiltration in esophageal cancer.
• DC composition, particularly the shift towards IDCs, is associated with poor differentiation in SCC.
• Altered lymph node morphology and increased IDCs in metastatic nodes suggest immune modulation in esophageal cancer.