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Ultrastructural peculiarities of intercellular junctions in bronchopulmonary carcinomas
Morphologie Et Embryologie
|April 1, 1981
Summary
This study found that reduced intercellular junctions and ultrastructural aberrations in lung carcinomas correlate with invasion capacity. These changes were particularly noted in less differentiated epidermoid carcinoma types.
Area of Science:
- Oncology
- Cell Biology
- Pathology
Background:
- Intercellular junctions are crucial for tissue integrity and cell-cell communication.
- Alterations in intercellular junctions are implicated in cancer progression and metastasis.
Purpose of the Study:
- To investigate the ultrastructural characteristics of intercellular junctions in bronchopulmonary carcinomas.
- To correlate these ultrastructural changes with the invasive capacity of the tumors.
Main Methods:
- Electron microscopy was used to examine bronchial biopsy samples from six patients with bronchopulmonary carcinomas.
- Histological types, including macrocellular and epidermoid carcinomas, were analyzed.
- The frequency and morphology of various intercellular junctions (close, gap, zonulae adherentes, maculae adherentes, desmosomes) were assessed.
Main Results:
- A scarcity of intercellular junctions was observed in all studied carcinomas, especially in less differentiated epidermoid carcinoma.
- Poorly differentiated carcinomas predominantly showed close and gap junctions, zonulae adherentes, and maculae adherentes.
- Differentiated carcinoma types exhibited frequent desmosomes.
- Reduced junction frequency was associated with ultrastructural aberrations.
Conclusions:
- Ultrastructural changes in intercellular junctions are present in bronchopulmonary carcinomas.
- These alterations correlate with the invasive capacity of cancer cells.
- The fundamental invasive property of cancer cells is not diminished by these junctional changes.