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Journal Article
Research Support, Non-U.S. Gov't
Elevated nitric oxide and 3',5' cyclic guanosine monophosphate levels in patients with alcoholic cirrhosis.
World Journal of Gastroenterology : WJG 2008 January 15
AIM: To evaluate whether serum levels of nitric oxide (NO*) and plasma levels of cyclic guanosine monophosphate (cGMP) and total glutathione (GSH) are altered in patients with alcoholic cirrhosis and to examine their correlation with the severity of liver disease.
METHODS: Twenty-six patients with alcoholic liver cirrhosis were studied. Serum levels of NO* and plasma levels of cGMP and GSH were measured in 7 patients with compensated alcoholic cirrhosis (Child-Pugh A) and 19 patients with advanced cirrhosis (Child-Pugh B and C). The model for end-stage liver disease (MELD) score was evaluated. Sixteen healthy volunteers served as controls. Liver enzymes and creatinine levels were also tested.
RESULTS: NO* and cGMP levels were higher in patients with Child-Pugh B and C cirrhosis than in Child-Pugh A cirrhosis or controls (NO*: 21.70 +/- 8.07 vs 11.70 +/- 2.74; 21.70 +/- 8.07 vs 7.26 +/- 2.47 micromol/L, respectively; P < 0.001) and (cGMP: 20.12 +/- 6.62 vs 10.14 +/- 2.78; 20.12 +/- 6.62 vs 4.95 +/- 1.21 pmol/L, respectively; P < 0.001). Total glutathione levels were lower in patients with Child-Pugh B and C cirrhosis than in patients with Child-Pugh A cirrhosis or controls (16.04 +/- 6.06 vs 23.01 +/- 4.38 or 16.04 +/- 6.06 vs 66.57 +/- 26.23 micromol/L, respectively; P < 0.001). There was a significant correlation between NO* and cGMP levels in all patients with alcoholic cirrhosis. A significant negative correlation between reduced glutathione/glutathione disulfide and the MELD score was found in all cirrhotic patients.
CONCLUSION: Our results suggest a role for oxidative stress in alcoholic liver cirrhosis, which is more significant in decompensated patients with higher levels of NO* and cGMP and lower GSH levels than in compensated and control patients. Altered mediator levels in decompensated patients may influence the hemodynamic changes in and progression of liver disease.
METHODS: Twenty-six patients with alcoholic liver cirrhosis were studied. Serum levels of NO* and plasma levels of cGMP and GSH were measured in 7 patients with compensated alcoholic cirrhosis (Child-Pugh A) and 19 patients with advanced cirrhosis (Child-Pugh B and C). The model for end-stage liver disease (MELD) score was evaluated. Sixteen healthy volunteers served as controls. Liver enzymes and creatinine levels were also tested.
RESULTS: NO* and cGMP levels were higher in patients with Child-Pugh B and C cirrhosis than in Child-Pugh A cirrhosis or controls (NO*: 21.70 +/- 8.07 vs 11.70 +/- 2.74; 21.70 +/- 8.07 vs 7.26 +/- 2.47 micromol/L, respectively; P < 0.001) and (cGMP: 20.12 +/- 6.62 vs 10.14 +/- 2.78; 20.12 +/- 6.62 vs 4.95 +/- 1.21 pmol/L, respectively; P < 0.001). Total glutathione levels were lower in patients with Child-Pugh B and C cirrhosis than in patients with Child-Pugh A cirrhosis or controls (16.04 +/- 6.06 vs 23.01 +/- 4.38 or 16.04 +/- 6.06 vs 66.57 +/- 26.23 micromol/L, respectively; P < 0.001). There was a significant correlation between NO* and cGMP levels in all patients with alcoholic cirrhosis. A significant negative correlation between reduced glutathione/glutathione disulfide and the MELD score was found in all cirrhotic patients.
CONCLUSION: Our results suggest a role for oxidative stress in alcoholic liver cirrhosis, which is more significant in decompensated patients with higher levels of NO* and cGMP and lower GSH levels than in compensated and control patients. Altered mediator levels in decompensated patients may influence the hemodynamic changes in and progression of liver disease.
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