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Disease Markers
Volume 2015 (2015), Article ID 683087, 8 pages
http://dx.doi.org/10.1155/2015/683087
Research Article

Immunoexpression of Ki-67, MCM2, and MCM3 in Ameloblastoma and Ameloblastic Carcinoma and Their Correlations with Clinical and Histopathological Patterns

1Research Department, School of Dentistry, Universidad Juárez del Estado de Durango (UJED), 34000 Durango, DGO, Mexico
2Health Care Department, Universidad Autónoma Metropolitana, Xochimilco, 04960 Mexico City, DF, Mexico
3Molecular Pathology Area, School of Dentistry, Universidad de la República (UDELAR), 19200 Montevideo, Uruguay

Received 7 July 2015; Accepted 7 December 2015

Academic Editor: Irene Rebelo

Copyright © 2015 Ramón Gil Carreón-Burciaga et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cell proliferation assays are performed using antibodies against nuclear proteins associated with DNA replication. These nuclear proteins have gained special interest to predict the biological and clinical behaviors of various tumors. The aim of this study was to analyze the presence of Ki-67 protein and the minichromosome maintenance-2 (MCM2) and maintenance-3 (MCM3) proteins in ameloblastoma. Materials and Methods. Cell proliferation marker expression levels were assessed via immunohistochemistry in 111 ameloblastoma cases (72 unicystic ameloblastoma samples, 38 solid/multicystic ameloblastoma samples, and 1 ameloblastic carcinoma). The label index was performed as described previously. Results. MCM2 and MCM3 showed higher proliferation indexes in all variants of ameloblastoma compared to the classic marker Ki-67. No correlation between the proliferation index and the clinical and protein expression data was observed. Conclusion. The results suggest that clinical features do not directly affect tumor cell proliferation. Moreover, the high levels of cellular proliferation of MCM2 and MCM3 compared with Ki-67 may indicate that MCM2 and MCM3 are more sensitive markers for predicting the growth rate and eventually might be helpful as a tool for predicting aggressive and recurrent behaviors in these tumors.