Expression of gamma glutamyl hydrolase and carbonic anhydrase 9 in oral squamous cell carcinoma and their association with extracapsular spread

Burhanudin, Nor Aszlitah and Kallarakkal, Thomas George (2017) Expression of gamma glutamyl hydrolase and carbonic anhydrase 9 in oral squamous cell carcinoma and their association with extracapsular spread. In: 1st IIUM International Dental Conference 2017 in Commemoration of the Kulliyyah of Dentistry 10th Anniversary (1st IIDC), 6th-8th October 2017, Kuantan, Pahang. (Unpublished)

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Abstract

Introduction: Extracapsular spread (ECS) is one of the most important prognostic factors in oral squamous cell carcinoma (OSCC). Gamma Glutamyl Hydrolase (GGH) is a lysosomal enzyme which is involved in folate homeostasis. It is overexpressed in several human malignancies but its role in OSCC has never been reported. Carbonic Anhydrase 9 (CA9) is a transmembrane glycoprotein and is related to hypoxia. High expression of CA9 has been associated with poor prognosis in several tumours including OSCC. This study was aimed to investigate the expression of GGH and CA9 in OSCC and their potential use as biomarkers to predict ECS. Materials and Methods: Immunohistochemical staining with GGH and CA9 markers were performed in 35 cases of OSCC (19 with ECS and 16 without ECS) and 5 cases of normal mucosa. A semi-quantative index was used for immunoscoring. Association between the expression of these markers and ECS status were analyzed using chi-square test. Results: Immunohistochemical results indicated that GGH and CA9 were upregulated in OSCC. High GGH and CA9 expression were significantly associated with ECS (p<0.05). Combination of GGH and CA9 showed greater prognostic accuracy as compared to the individual markers. Conclusion(s): Both separately and in combination GGH and CA9 offer potential as prognostic biomarkers in OSCC and was thus reliable in segregating the OSCC cases based on ECS status.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	6664/66747
Uncontrolled Keywords:	carbonic anhydrase 9, extracapsular spread, gamma glutamyl hydrolase, OSCC
Subjects:	R Medicine > RB Pathology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Dentistry > Department of Oral Maxillofacial Surgery and Oral Diagnosis Kulliyyah of Dentistry
Depositing User:	Dr Nor Aszlitah Burhanudin
Date Deposited:	09 Nov 2018 09:27
Last Modified:	09 Nov 2018 09:27
URI:	http://irep.iium.edu.my/id/eprint/66747

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