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KMID : 0355620110370030161
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Journal of Korean Association of Oral and Maxillofacial Surgeons
2011 Volume.37 No. 3 p.161 ~ p.168
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Expression of Bcl-2 in the epithelial lining and clinical findings of keratocystic odotogenic tumor
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Lee In-Hyuk
Choi So-Young
Park Ji-Hoon
Kim Chin-Soo
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Abstract
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Purpose: The odontogenic keratocysts demonstrated a high recurrence rate and a biologically aggressive nature. This might be due to unknown factors inherent in the epithelium or enzymatic activity in the fibrous wall. Bcl-2 protein is characterized by its ability to inhibit apoptosis. The aim of this study was to evaluate the expression and distribution of bcl-2 in the OKC?, its possible relationship with the tumorous characteristics, such as the aggressive nature and high recurrence rate, and its usefulness to differentiate OKC? from dentigerous cysts.
Material and Method : Formalin fixed paraffin-embedded tissue sections of 53 OKC?, and 44 dentigerous cyst were immunohistochemically analyzed quantitatively for the immunoreactivity of the bcl-2 protein with i-solution.
Results: More Bcl-2 expression was observed in the OKC? (mean34.387%) than dentigerous cyst (mean11.144%) with statistical significance (P＜0.001). Seventeen and 15 of the 32 OKC? in this study showed positivity in the basal layer and basal/suprabasal layers, respectively. In dentigerous cyst, 2 of 3 showed positivity in the basal cell layer.
Conclusion: Considering that bcl-2 over expression may lead to the increased survival of epithelial cells, this study demonstrated a possible relationship between the aggressive nature of OKC and the intrinsic growth potential of its lining epithelium. Furthermore, the basal/suprabasal distribution of bcl-2 positive cells was observed in some OKC?, which might have a significant impact on the behavior of cysts. The bcl-2 expression of OKC? can be useful for differentiating OKC? from dentigerous cysts.
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KEYWORD
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Bcl-2, Keratocystic Odontogenic Tumor, Dentigerous cyst
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