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E cadherin expression in normal and neoplastic canine mammary gland
B Restucci1, S Papparella, G De Vico
1Dipartimento di Patologia, Facoltà di Medicina Veterinaria, Università Federico II, Naples, Italy.
Insights
E-cadherin, an important cell adhesion molecule, showed reduced expression in malignant canine mammary glands. Its abnormal distribution correlates with lower tumor differentiation, impacting canine cancer research.
Area of Science:
- Veterinary Pathology
- Canine Oncology
- Molecular Biology
Background:
- Epithelial intercellular adhesion is crucial for maintaining tissue structure.
- E-cadherin is a key cell adhesion molecule involved in epithelial cell binding.
- Alterations in E-cadherin expression are implicated in various cancers.
Purpose of the Study:
- To investigate the expression and distribution of E-cadherin in normal and neoplastic canine mammary glands.
- To correlate E-cadherin status with the histological type and differentiation grade of canine mammary tumors.
Main Methods:
- Immunohistochemical evaluation of E-cadherin.
- Analysis of normal canine mammary glands.
- Assessment of canine mammary adenocarcinomas, including tubular, papillary, solid, and squamous cell carcinomas.
Main Results:
- Normal canine mammary glands exhibited strong intercellular E-cadherin staining.
- Tubular and papillary adenocarcinomas showed reduced and heterogeneous/cytoplasmic E-cadherin expression.
- Solid and squamous cell carcinomas were negative for E-cadherin.
Conclusions:
- Reduced E-cadherin expression and altered distribution are associated with malignant canine mammary neoplasms.
- E-cadherin status may serve as a potential biomarker for the differentiation grade of canine mammary tumors.
- These findings contribute to understanding the role of E-cadherin in canine mammary carcinogenesis.
Abstract:
The epithelial intercellular adhesion molecule, E cadherin, was evaluated immunohistochemically in a series of normal and malignant neoplastic canine mammary glands. The normal glands showed strong immunolabelling at the intercellular borders of all the ductal cells. Tubular and papillary mammary adenocarcinomas had reduced intercellular E cadherin positivity with "heterogeneous" or "cytoplasmic" distribution. Solid and squamous cell carcinomas were negative. These results suggest that reduced expression and abnormal distribution of E cadherin may be related to the differentiation grade of these neoplasms.