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P53, Bcl-2 and Ki67 immunoexpression in follicular solid ameloblastomas
Alma Florescu1, Cristiana Simionescu, Raluca Ciurea
1Department of Pathology, University of Medicine and Pharmacy of Craiova, Romania.
Summary
This study analyzed 17 ameloblastomas, finding p53 and Bcl-2 expression in peripheral cells. These findings suggest peripheral columnar cells are key to ameloblastoma proliferation and apoptosis.
Area of Science:
- Oral Pathology
- Oncology
- Molecular Biology
Background:
- Ameloblastoma is a common odontogenic tumor.
- Understanding the molecular mechanisms of ameloblastoma is crucial for diagnosis and treatment.
- The roles of p53, Bcl-2, and Ki67 in ameloblastoma are not fully elucidated.
Purpose of the Study:
- To investigate the expression of p53, Bcl-2, and Ki67 in ameloblastoma epithelial compartments.
- To correlate the expression of these markers with tumor characteristics and behavior.
Main Methods:
- Histopathological and immunohistochemical analysis of 17 ameloblastoma samples.
- Evaluation of p53, Bcl-2, and Ki67 expression in peripheral and stellate reticulum cells.
- Clinical data review including age, gender, and location.
Main Results:
- Ameloblastomas predominantly affected males aged 20-40, with 88.2% located in the mandible.
- Typical follicular ameloblastoma was the most common subtype (70.6%).
- High p53 and Bcl-2 immunoexpression (>50%) was observed in peripheral cells, with low expression (<10%) in the stellate reticulum. Ki67 index was <10% in both compartments. Squamous and granular cells showed no staining.
Conclusions:
- Peripheral columnar cells are the active compartment in ameloblastomas.
- These cells are involved in proliferation-apoptosis processes.
- p53 and Bcl-2 expression patterns may indicate their role in ameloblastoma pathogenesis.
