Comparative Study of Expression of Smad3 in Oral Lichen Planus and Normal Oral Mucosa

Document Type : Original Article

Authors
1 Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
2 Private Dentist, Babol, Iran
3 Department of Periodontology, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
4 Non-Communicable Pediatric Diseases Research Center, Amirkola Hospital, Babol University of Medical Sciences, Babol, Iran
Abstract
Oral lichen planus (OLP) is a chronic inflammatory disease of the oral mucosa which is considered by the World
Health Organization (WHO) as a premalignant condition. One step in malignant development is so called
epithelial mesenchymal transition (EMT), a process whereby epithelial cells acquire mesenchymal
characteristics. A factor known to induce EMT is the transforming growth factor-β (TGF-β), which uses the
Smad proteins as mediators for its signaling. The aim of this study was to compare the expression of Smad 3 in
Oral Lichen Planus and normal oral mucosa. This descriptive analytic study was performed on 30 patients with
OLP (21 women and 9 men with mean age of 45.23± 2.44 years) and 20 normal oral mucosa (14 women and 6
men with mean age of 46.95± 2.21 years). The samples were studied by immunohistochemical staining. Data
were analyzed with paired T-test and Wilcoxon test by SPSS software. Expression of Smad3 in OLP samples
and normal oral mucosa was different. This difference was statistically significant (P<0.001). The apparently
higher expression of Smad 3 in oral lichen planus compared to normal oral mucosa might help to discuss its
higher potential for malignant transition.
Keywords