Indian Journal of Pathology and Microbiology
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Year : 2014  |  Volume : 57  |  Issue : 4  |  Page : 553-557

Association of Ki-67 antigen and p53 protein at invasive tumor front of oral squamous cell carcinoma

1 Departments of Oral and Maxillofacial Pathology, Shree Bankey Bihari Dental College and Research Centre, Ghaziabad, Uttar Pradesh, India
2 Sardar Patel Institute of Dental and Medical Sciences, Lucknow, Uttar Pradesh, India
3 Faculty of Dental Sciences, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
4 Career Post Graduate Institute of Dental Sciences and Hospital, Lucknow, Uttar Pradesh, India

Correspondence Address:
Akhilesh Chandra
2/29 Rashmi Khand, Sharda Nagar, Lucknow - 226 002, Uttar Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0377-4929.142660

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Aim: Studies reveal that invasive tumor front may be the best field for quantification of proliferative and apoptotic markers. The current study assessed the expression of Ki-67 antigen and p53 protein at invasive tumor front of oral squamous cell carcinoma (OSCC) and correlated the immunostaining with the histologic grades of malignancy. Materials and Methods: A total of 80 slides sample was prepared for the study, one each from ten normal oral mucosa cases and two each from 30 OSCC cases. The OSCC patients were biopsied along invasive tumor front, and samples were immunohistochemically analyzed for the expression of both Ki-67 antigen and p53 protein. Results: Of the total 30 OSCC cases, the expression of p53 was found positive in 20 cases (66.6%), while Ki-67 expression was found positive in 21 cases (70%). All the cases in the control group were negative. A higher p53 and Ki-67 expression were seen in OSCC group as compared to normal mucosa. On comparing the control group with various grades of OSCC a statistically significant result was obtained. Conclusion: Higher and statistically significant expression was noted for both p53 and Ki-67 antigen. The results emphasize the potential of Ki-67 and p53 as biomarkers of carcinogenesis in OSCC. Ki-67 expression was comparatively higher when compared with p53 except in poorly differentiated squamous cell carcinoma and signifies actively proliferating malignant cells at invasive tumor front.

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