M C Solomon1, S Carnelio, V Gudattu. 1. Department of Oral Pathology, Manipal College of Dental Science, Manipal University, Manipal, Karnataka 576 104, India.
Abstract
BACKGROUND: An intriguing aspect of Oral Squamous Cell Carcinomas (OSCC) is its behavioral disparity. Among patients who present with the similar clinicopathological features, some have a better prognosis than others. Identification of molecular alterations responsible for this may contribute to a greater understanding of tumor behavior. Tissue microarray (TMA) approach is a high throughput technology that enables analysis of multiple molecular targets simultaneously without causing any morphological alteration to tissue specimens. AIM AND OBJECTIVE: To assess the tumor behavior based on the expression of p53, Bcl-2 and E-cadherin using TMA technology. SETTINGS AND DESIGN: This was a case series analysis using tissue microarray technology. MATERIALS AND METHODS: Formalin-fixed Paraffin-embedded (FFPE) tissue blocks of histological proven cases of OSCC (n = 30) were retrieved from the department archives. Tissue microarray blocks were constructed; 4 mum thick sections were cut and immunostained for p53, Bcl-2 and E-cadherin. STATISTICAL ANALYSIS: Mean (SD) was used to summarize age, frequencies with percentages was used to summarize categorical variable and Chi-square test was used to find association between histopathology evaluation and expression of Bcl-2, p53, E-cadherin. RESULTS AND CONCLUSION: Bcl-2 was the most frequently expressed biomarker. The expression of Bcl-2 was inversely related to the degree of differentiation (P = 0.005). The follow-up data showed that 63.6% of the cases that were positive for both Bcl-2 and E-cadherin were disease-free following treatment. Tissue microarray technology is a promising way to analyse multiple biomarkers simultaneously. The molecular data obtained from TMA will enhance diagnosis, provide better prognostication and will improve cancer treatment for individual patients.
BACKGROUND: An intriguing aspect of Oral Squamous Cell Carcinomas (OSCC) is its behavioral disparity. Among patients who present with the similar clinicopathological features, some have a better prognosis than others. Identification of molecular alterations responsible for this may contribute to a greater understanding of tumor behavior. Tissue microarray (TMA) approach is a high throughput technology that enables analysis of multiple molecular targets simultaneously without causing any morphological alteration to tissue specimens. AIM AND OBJECTIVE: To assess the tumor behavior based on the expression of p53, Bcl-2 and E-cadherin using TMA technology. SETTINGS AND DESIGN: This was a case series analysis using tissue microarray technology. MATERIALS AND METHODS:Formalin-fixed Paraffin-embedded (FFPE) tissue blocks of histological proven cases of OSCC (n = 30) were retrieved from the department archives. Tissue microarray blocks were constructed; 4 mum thick sections were cut and immunostained for p53, Bcl-2 and E-cadherin. STATISTICAL ANALYSIS: Mean (SD) was used to summarize age, frequencies with percentages was used to summarize categorical variable and Chi-square test was used to find association between histopathology evaluation and expression of Bcl-2, p53, E-cadherin. RESULTS AND CONCLUSION:Bcl-2 was the most frequently expressed biomarker. The expression of Bcl-2 was inversely related to the degree of differentiation (P = 0.005). The follow-up data showed that 63.6% of the cases that were positive for both Bcl-2 and E-cadherin were disease-free following treatment. Tissue microarray technology is a promising way to analyse multiple biomarkers simultaneously. The molecular data obtained from TMA will enhance diagnosis, provide better prognostication and will improve cancer treatment for individual patients.
Authors: María Isabel Amaya Arbeláez; Ana Carolina Alves de Paula E Silva; Geovana Navegante; Valeria Valente; Paula Aboud Barbugli; Carlos Eduardo Vergani Journal: Front Cell Infect Microbiol Date: 2021-02-25 Impact factor: 5.293