Implications of antioxidant enzymes in human gastric neoplasms

  • Authors: M. Monari, J. Foschi, C. Calabrese, G. Liguori, G. Di Febo, F. Rizzello, P. Gionchetti, A. Trinchero, G. P. Serrazanetti
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  • Published online on: Sunday, November 1, 2009
  • Pages: 693-700
  • DOI: 10.3892/ijmm_00000281

Abstract

The present study is the first to evaluate the expression and activity of MnSOD, Cu/ZnSOD and catalase in human gastric samples, since ROS play a significant role in the pathogenesis of different forms of malignancy inducing mutations and various diseases such as gastric cancer. Biopsies and surgical samples from 53 patients (male/female 22/31, mean age 56.5±15.8 years) consisted of 15 healthy, 12 autoimmune atrophic gastritis, 10 Helicobacter pylori (HP) infection, 8 HP-negative chronic gastritis (CG) and 8 adenocarcinoma cases. Enzyme activity and expression were evaluated by spectrophotometry and immunoblotting after specific extraction in phosphate buffer. We found that MnSOD activity was increased in adenocarcinoma, CG and HP tissues (p<0.05-0.001), while Cu/ZnSOD was significantly lower in adenocarcinoma and HP tissues (p<0.001) when compared to the healthy control. MnSOD and Cu/ZnSOD were expressed to a significantly higher degree in adenocarcinoma and HP tissues (p<0.05 and <0.001 respectively) and to a significantly lower degree in CG tissues with respect to the healthy patients (p<0.05 and <0.001). A significant decrease in CAT activity in adenocarcinoma and HP tissues was observed (p<0.01 and <0.05). Gastric human neoplasms showed significant changes in antioxidant enzymes, that represent the first line in antioxidant protection against radical attack. The difficulties in correlating the antioxidant enzyme with the neoplasms was related to the complexity of the biochemical pathways that regulate the cellular redox balance. Our results are important in enhancing the understanding of the role that these enzymes play in the promotion/suppression of the carcinogenesis cascade in human gastric mucosa.
Journal Cover

November 2009
Volume 24 Issue 5

Print ISSN: 1107-3756
Online ISSN:1791-244X

2013 Impact Factor: 1.88
Ranked #27/122 Medicine Research and Experimental
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APA
Monari, M., Foschi, J., Calabrese, C., Liguori, G., Di Febo, G., Rizzello, F., Gionchetti, P., Trinchero, A., & Serrazanetti, G. (2009). Implications of antioxidant enzymes in human gastric neoplasms. International Journal of Molecular Medicine, 24(5), 693-700.
MLA
Monari, Foschi, Calabrese, Liguori, Di Febo, Rizzello, Gionchetti, Trinchero, and G. Serrazanetti. "Implications of antioxidant enzymes in human gastric neoplasms." International Journal of Molecular Medicine International Journal of Molecular Medicine 24.5 (2009): 693-700.
Chicago
Monari, Foschi, Calabrese, Liguori, Di Febo, Rizzello, Gionchetti, Trinchero, and G. Serrazanetti. "Implications of antioxidant enzymes in human gastric neoplasms." International Journal of Molecular Medicine International Journal of Molecular Medicine 24 no. 5 (2009): 693-700.