Clinicopathological features and prognostic implications of loss of K5 and gain of K1, K8 and K18 in oral potentially malignant lesions and squamous cell carcinomas: An immunohistochemical analysis

Aims: to analyze alterations in the expression and localization patterns of keratins-K1, K5, K8 and K18 using immunohistochemistry and correlate with clinicopathological parameters of patients with oral potentially malignant lesions and squamous cell carcinomas to evaluate diagnostic and prognostic implications of loss and gain of keratins. Methods: Altered keratin Sawant Sharada1, Vaidya Milind2, Chaukar Devendra3, Gangadaran Prakash4, Singh Archana5, Rajadhyax Siddheshwar6, Kannan Sadhana7, Padmavathi A8, Kane Shubhada9, Pagare Sandeep10, Kannan Ranganathan11, D’Cruz Anil12 Affiliation: 1MSc, Scientific Officer, Vaidya Lab. , Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410 210, Maharashtra, India; 2PhD, Scientific Officer, Vaidya Lab. , Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410 210, Maharashtra, India; 3MS, Professor and Surgeon, Oral Surgery, Head and Neck Unit, Tata Memorial Hospital, Parel, Mumbai, 400 012, Maharashtra, India; 4MSc, Post graduate student, Department of Nuclear Medicine, Kyungpook National University, Daegu, Republic of Korea, 700-721; 5MSc, Research Assistant, Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410 210, Maharashtra, India; 6MSc, Research Assistant, Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410 210, Maharashtra, India; 7MSc, Program Manager, Epidemiology and Clinical Trials Unit, Clinical Research Centre, Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Kharghar, Navi Mumbai, Maharashtra, India; 8MSc, ad-hoc statistician, Epidemiology and Clinical Trials Unit, Clinical Research Centre, Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Kharghar, Navi Mumbai, Maharashtra, India; 9MD, Professor and Pathologist, Pathology Department, Tata Memorial Hospital, Parel, Mumbai, 400 012, Maharashtra, India; 10MDS, Professor and Chief, Department of Oral Medicine & Radiology, D.Y. Patil Dental College and Hospital, Sector 7, Nerul, Navi-Mumbai-400706, Maharashtra, India; 11MDS, Professor and Chief, Department of Oral and Maxillofacial Pathology, Ragas Dental College and Hospital, Uthandi, 600096 Chennai, India; 12MS, Professor and Chief, Oral Surgery, Head and Neck Unit, Tata Memorial Hospital, Parel, Mumbai, 400 012, Maharashtra, India. Corresponding Author: Sharada Sawant, Vaidya Lab. , Advanced Centre for Treatment, Research & Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, Maharashtra, India; Tel: +91 22 27405134, Fax: +91 22 27405085; Email: sssawant@actrec.gov. in Received: 14 July 2014 Accepted: 14 August 2014 Published: 25 December 2014 expression pattern was investigated using immunohistochemistry in tissues of oral normal mucosa (n=10), leukoplakia (n=50), submucous fibrosis (n=67) and tumor respective cut-margins (n=304). the prognostic significance was determined by correlating the values of these two events singly as well as in different permutations and combinations with clinicopathological parameters using univariate and multivariate analyzes. results: Loss of K5 and aberrant Original article OPen acceSS | Peer reviewed