P53 protein expression in odontogenic cysts

Area of Science:

• Oral Pathology
• Oncology
• Molecular Biology

Background:

• The p53 protein is a tumor suppressor involved in regulating cell proliferation.
• Odontogenic keratocysts (OKCs) exhibit aggressive behavior and high recurrence rates, distinguishing them from other odontogenic cysts.
• Understanding the molecular mechanisms underlying OKC behavior is crucial for effective management.

Purpose of the Study:

• To investigate the expression of p53 protein in Odontogenic Keratocysts (OKCs) and compare it with dentigerous and radicular cysts.
• To determine if p53 expression correlates with clinicopathological features of OKCs, such as epithelial dysplasia.
• To explore the potential role of p53 in the altered cell cycle control observed in OKCs.

Main Methods:

• Immunohistochemical analysis was performed to detect p53 protein expression.
• The study included 20 OKCs, 22 dentigerous cysts, and 24 radicular cysts.
• Statistical analysis was used to compare p53 expression levels and correlate them with clinicopathological data.

Main Results:

• P53 protein was expressed in 45% of OKCs, significantly higher than in dentigerous cysts (9.1%) and radicular cysts (8.3%) (p = 0.003).
• P53 expression was significantly associated with epithelial dysplasia in OKCs (p = 0.007).
• Parabasal distribution of p53-positive cells was observed in OKCs, differing from other cyst types.

Conclusions:

• Overexpression and altered distribution of p53 protein in OKCs suggest a disruption in cell cycle control.
• These findings highlight potential molecular differences contributing to the aggressive nature and recurrence of OKCs.
• P53 alterations may serve as a marker for understanding the pathogenesis of Odontogenic Keratocysts.