Yanhong Ni1,2,1, Xiaoxin Zhang1,1, Yunxia Wan3, Kai Dun Tang3, Yin Xiao3, Yue Jing1, Yuxian Song1, Xiaofeng Huang1, Chamindie Punyadeera3, Qingang Hu1,2. 1. Central Laboratory, Nanjing Stomatological Hospital, Medical School, Nanjing University, Nanjing, Jiangsu, China. 2. Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China. 3. The School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove, QLD, Australia and the Translational Research Institute, Brisbane, Australia.
Abstract
BACKGROUND: p16 has often been found to be overexpressed in patients oral squamous cell carcinoma (OSCC), but its prognostic value between anatomic subsites is still unclear. OBJECTIVE: The aim of this study was to investigate the diagnostic and prognostic values of p16 in OSCC originating from tongue, gingiva or buccal mucosa. METHODS: A total of 147 OSCC patients with tumors arising from the tongue, gingiva or buccal mucosa were enrolled in this study. p16 expression was detected using immunohistochemistry (IHC), and the presence of HPV16 was determined by real-time PCR in p16 positive patients. The correlation of p16 expression with the clinical parameters was evaluated. RESULTS: Only one p16 positive patient with a cut off value of 25% and 75% was HPV16 positive. Although overall survival (OS), recurrence free survival (RFS) and metastasis free survival (MFS) had no significant differences between the p16 positive and negative patients, p16 negative patients (cut off value 25%) had more RFS in the buccal mucosa cancer (p= 0.03) than the p16-positive patients. CONCLUSIONS: The prevalence of HPV16 in Chinese OSCC patients was low. p16 overexpression decoupled from HPV infection was not a prognostic marker for OSCC patients except for patients with the buccal mucosa cancer.
BACKGROUND:p16 has often been found to be overexpressed in patientsoral squamous cell carcinoma (OSCC), but its prognostic value between anatomic subsites is still unclear. OBJECTIVE: The aim of this study was to investigate the diagnostic and prognostic values of p16 in OSCC originating from tongue, gingiva or buccal mucosa. METHODS: A total of 147 OSCC patients with tumors arising from the tongue, gingiva or buccal mucosa were enrolled in this study. p16 expression was detected using immunohistochemistry (IHC), and the presence of HPV16 was determined by real-time PCR in p16 positive patients. The correlation of p16 expression with the clinical parameters was evaluated. RESULTS: Only one p16 positive patient with a cut off value of 25% and 75% was HPV16 positive. Although overall survival (OS), recurrence free survival (RFS) and metastasis free survival (MFS) had no significant differences between the p16 positive and negative patients, p16 negative patients (cut off value 25%) had more RFS in the buccal mucosa cancer (p= 0.03) than the p16-positive patients. CONCLUSIONS: The prevalence of HPV16 in Chinese OSCC patients was low. p16 overexpression decoupled from HPV infection was not a prognostic marker for OSCC patients except for patients with the buccal mucosa cancer.
Authors: Frans J Mulder; Faisal Klufah; Famke M E Janssen; Farzaneh Farshadpour; Stefan M Willems; Remco de Bree; Axel Zur Hausen; Mari F C M van den Hout; Bernd Kremer; Ernst-Jan M Speel Journal: Front Oncol Date: 2021-01-20 Impact factor: 6.244