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An Official Publication of the Indian Association of Oral and Maxillofacial Pathologists


 
ORIGINAL ARTICLE Table of Contents   
Year : 2011  |  Volume : 15  |  Issue : 3  |  Page : 283-287
Immunohistochemical expression of cyclin D1 in ameloblastomas and adenomatoid odontogenic tumors


1 Departments of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences and Hospital, Patia, Bhubaneshwar, Orissa, India
2 Departments of Oral Pathology and Microbiology, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
3 Departments of Oral Pathology and Microbiology, KSR Dental College, TIruchangode, Tamil Nadu, India

Correspondence Address:
Harish Kumar
Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences and Hospital, Patia, Bhubaneshwar, Orissa
India
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Source of Support: Partly funded by Rajiv Gandhi University of Health Sciences, Bangalore, Karnataka state, India, Conflict of Interest: None


DOI: 10.4103/0973-029X.86685

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Background: Cyclin D1, a member of G1 cyclins, controls the cell-cycle transit from the G1 to S phase. The deregulation and overexpression of cyclin D1 has been revealed in many tumors of diverse histogenesis. Ameloblastoma is the most frequently encountered odontogenic tumor known for its local invasiveness and a high tendency to recur. The adenomatoid odontogenic tumor is a benign, nonaggressive tumor with a limited growth and no tendency to recur. Aim: The aim was to investigate whether the immunohistochemical expression of cyclin D1 as a proliferation marker in ameloblastoma and adenomatoid odontogenic tumor correlates with the known clinical behavior of these two benign neoplasms. Materials and Methods: Ameloblastoma cases consisted of follicular, plexiform, and unicystic subtypes. The positive staining was assessed based on intensity of staining, localization of staining, and in different cell types in both the tumors. Two cases of follicular ameloblastoma and one case of plexiform ameloblastoma showed intense staining, but the predominant staining intensity was overall mild in both ameloblastoma and adenomatoid odontogenic tumors. The immunoreactivity was found both in nucleus and cytoplasm in ameloblastoma and only nuclear in adenomatoid odontogenic tumors. The peripheral columnar and central stellate reticulum-like cells of ameloblastoma showed immunoreactivity with squamous and granular cells being negative. In adenomatoid odontogenic tumors, the whorls showed predominant localization of staining. Statistical comparison with a Mann-Whitney U-test showed no significant difference in staining intensities between different histologic subtypes of ameloblastomas and also between ameloblastoma and adenomatoid odontogenic tumors (P>0.005). Conclusion: The marked expression of cyclin D1 in these tumors suggested its participation in proliferation of both the tumors and its expression patterns were irrespective of their known biologic behavior.


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Journal of Oral and Maxillofacial Pathology | Published by Wolters Kluwer - Medknow
Online since 15th Aug, 2007