alexa Evaluation of glutathione S-transferase activity in human buccal epithelial dysplasias and squamous cell carcinomas.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Metabolomics:Open Access

Author(s): Chen YK, Lin LM

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Abstract Glutathione S-transferase (GST) activity and amount of GST alpha, mu and pi isoforms were measured in 40 patients with histopathologically confirmed oral epithelial dysplasia (OED) and squamous cell carcinoma of buccal mucosa. The results were compared with those of normal mucosa in an equal number of age- and sex-matched healthy controls. Mean total GST activities were significantly elevated from normal buccal mucosa for mild OED, moderate OED, severe OED and squamous cell carcinoma. GST activity of value approximating 100 nmol/min/mg distinguished between normal and dysplasia, and of value about 400 nmol/min/mg delineated between dysplasia and squamous cell carcinoma were observed. GST pi was the predominant class in both the diseased and normal buccal mucosa examined. This class pi GST was present at an intracellular concentration, which was significantly higher in diseased buccal mucosa than in normal buccal mucosa. These results indicated that pi class GST was the major form of this enzyme in the cytosolic fraction of oral mucosa. The severity of OED related to squamous cell carcinoma development seemed to increase concomitantly with an increase in the level of this enzyme. Further studies will validate the role of GST pi estimation in predicting the potential malignancy of OED.
This article was published in Int J Oral Maxillofac Surg and referenced in Metabolomics:Open Access

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