Document Type : Research Articles
Oral Health Research Center, Faculty of Dental Medicine, Babol University of Medical Sciences, Babol, Iran.
Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.
Department of Biostatistics and Epidemiology, School of Public Health, Babol University of Medical Sciences, Babol, Iran.
Department Medical Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Department in Medical Virology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran.
Cancer Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.
Objective: Infection with human tumor viruses is one of the hypothesized causes of cancer. The current investigation aimed to explore the presence and quantitative analysis of a new human tumor virus, Merkel cell polyomavirus (MCPyV) in tissue samples of 114 patients with oral cavity lesions including oral squamous cell carcinoma (OSCC), oral lichen planus (OLP), Dysplasia and oral irritation fibroma (OIF) in Northern Iran. Methods: From 114 formalin fixed paraffin embedded samples; 35 with SCC, 29 with OLP, 14 with dysplasia and 36 with OIF were cut, deparaffinized and DNA was extracted. Quantitative detection of MCPyV large T antigen was performed by absolute quantitative Real-Time PCR. Result: MCPyV DNA was detected in 30.6% (n: 11/36) of IF, 24.1% (n; 7/29) of OLP, 21.4% (n:3/14) of dysplasia and 20% (n;7/35) of OSCC samples. The mean MCPyV DNA copy number was 2.32×10−2 ± 3.97 ×10−2, 2.02×10−2 (SD=3.13×10−2), 2.69×10−4 (SD=2.51×10−4), and 2.56×10−4 (SD=6.73×10−4) per cell in OSCC, dysplasia and both of OLP and OIF samples, respectively (P=0.76). Conclusion: This study provides the first data from Iran regarding the presence of MCPyV genome in oral cavity lesions and oral cancer. These results also emphasize that MCPyV has an active role in the occurrence of oral lesions and progression to cancer. Further studies should be carried out to clarify the role of MCPyV in oral cavity lesions.