Background and Purpose: Thrombotic disease is a leading cause of death in industrialized countries. The development of atherosclerosis is a major underlying pathogenesis. Atherosclerotic lesions are largely related to...Background and Purpose: Thrombotic disease is a leading cause of death in industrialized countries. The development of atherosclerosis is a major underlying pathogenesis. Atherosclerotic lesions are largely related to abnormalities in lipid metabolism, and improvement of dietary habits is of great significance. Chlorella is a unicellular organism belonging to the green algae family, and is consumed worldwide as a functional food for the purpose of health promotion due to its excellent nutritional balance including high quality protein. In this study, we investigated the effects of long-term consumption of Chlorella as a food on the development of atherosclerosis and its ability to dissolve thrombi caused by the disruption of the atherosclerotic layer as a functional study of Chlorella. Methods: ApoE<sup>−/−</sup> and Ldlr<sup>−/−</sup> double-knockout mice were fed a chlorella-supplemented experimental diet for 14 weeks. The Entire aorta method was used to measure atherosclerosis development, and the area of sclerotic vessels was evaluated as a percentage of the total area of vessels. In addition, mRNA levels of lipid metabolism-related proteins in the liver and blood vessels were analyzed, as well as blood lipoprotein analysis. Spontaneous thrombolytic activity was measured by measuring the change in volume over time of thrombus formed in microvessel running over the cremaster muscle of the mice using the He-Ne laser-induced thrombus model. Results: There was no significant difference between the two groups in atherosclerosis development compared to the placebo group. However, a significant decrease in SREBP-1 mRNA level and a significant increase in mRNA levels of LXR and CPY71a were observed in the chlorella group. Cholesterol and TG levels in each lipoprotein fraction did not differ between the two groups. On the other hand, thrombolysis in vivo was not significantly different between the two groups in terms of thrombus volume at 60 minutes after thrombus formation. However, a trend toward decreased PAI-1 and TAFI mRNA expression levels was observed in the chlorella group. Conclusion: Intake of chlorella as a food suggested an effect on cholesterol catabolism, increased bile acid synthesis, improved lipid metabolism, and inhibited the development of atherosclerosis. Furthermore, it was suggested that chlorella may suppress the expression of fibrinolytic inhibitory factor and enhance thrombolytic activity.展开更多
AIM:To identify factors that influence long-term liver function following radiofrequency ablation(RFA)in patients with viral hepatitis-related hepatocellular carcinoma.METHODS:A total of 123 patients with hepatitis B ...AIM:To identify factors that influence long-term liver function following radiofrequency ablation(RFA)in patients with viral hepatitis-related hepatocellular carcinoma.METHODS:A total of 123 patients with hepatitis B virus-or hepatitis C virus-related hepatocellular carcinoma(HCC)(n=12 and n=111,respectively)were enrolled.Cumulative rates of worsening Child-Pugh(CP)scores(defined as a 2-point increase)were examined.RESULTS:CP score worsening was confirmed in 22patients over a mean follow-up period of 43.8±26.3mo.Multivariate analysis identified CP class,platelet count,and aspartate aminotransferase levels as significant predictors of a worsening CP score(P=0.000,P=0.011 and P=0.024,respectively).In contrast,repeated RFA was not identified as a risk factor for liver function deterioration.CONCLUSION:Long-term liver function following RFA was dependent on liver functional reserve,the degreeof fibrosis present,and the activity of the hepatitis condition for this cohort.Therefore,in order to maintain liver function for an extended period following RFA,suppression of viral hepatitis activity is important even after the treatment of HCC.展开更多
Background: Recently, it has become apparent that reactive oxygen species (ROS) play a critical role in the initiation of atherosclerosis. In this study, the effect of radical scavenger edaravone to the leukocyte roll...Background: Recently, it has become apparent that reactive oxygen species (ROS) play a critical role in the initiation of atherosclerosis. In this study, the effect of radical scavenger edaravone to the leukocyte rolling and to the expression of adhesion molecules on microvascular endothelium was investigated. Methods: DSS induced rat colitis model was used as an inflammation model. Edaravone (10.5 mg/kg, Mitsubishi Tanabe Pharma Corporation, Japan) was used to examine the action of ROS. Images of leukocyte rolling in mesenteric microvessels were investigated in a fluorescence bio-imaging model. Each cross section from the target blood vessel (aotic root, aorta, superior mesenteric artery) were examined by immune-peroxidase staining with anti-P-selectin, E-selectin, ICAM-1 antibody using the streptavidin/biotinylated horseradish peroxidase method. Results: 1) Leukocyte rolling in mesenteric microvessels was significantly increased in colitis. The number of rolling leukocyte was significantly decreased in edaravone group than placebo group (501.3 ± 39.2 vs 252.2 ± 37.2 count/100 μm/10 min). 2) The expression of P-selectin in endothelial cell was significantly increased in colitis. However, this expression was decreased in edaravone group. 3) The expression of E-selectin was not induced to intact aortic root and aorta. In the superior mesenteric artery, the expression was induced by inflammation, and it was attenuated by edaravone. 4) There was little expression of ICAM-1 in both intact aortic root and aortas. While, in the superior mesenteric artery, the expression was confirmed only in placebo group in colitis, and it was attenuated in edaravone group. Conclusions: It was suggested that administration of edaravone led to improving a haemostasis of microcirculation based on down-regulation of adhesion molecules. These results support the evidence that ROS plays a critical role in micro- vascular dysfunction.展开更多
文摘Background and Purpose: Thrombotic disease is a leading cause of death in industrialized countries. The development of atherosclerosis is a major underlying pathogenesis. Atherosclerotic lesions are largely related to abnormalities in lipid metabolism, and improvement of dietary habits is of great significance. Chlorella is a unicellular organism belonging to the green algae family, and is consumed worldwide as a functional food for the purpose of health promotion due to its excellent nutritional balance including high quality protein. In this study, we investigated the effects of long-term consumption of Chlorella as a food on the development of atherosclerosis and its ability to dissolve thrombi caused by the disruption of the atherosclerotic layer as a functional study of Chlorella. Methods: ApoE<sup>−/−</sup> and Ldlr<sup>−/−</sup> double-knockout mice were fed a chlorella-supplemented experimental diet for 14 weeks. The Entire aorta method was used to measure atherosclerosis development, and the area of sclerotic vessels was evaluated as a percentage of the total area of vessels. In addition, mRNA levels of lipid metabolism-related proteins in the liver and blood vessels were analyzed, as well as blood lipoprotein analysis. Spontaneous thrombolytic activity was measured by measuring the change in volume over time of thrombus formed in microvessel running over the cremaster muscle of the mice using the He-Ne laser-induced thrombus model. Results: There was no significant difference between the two groups in atherosclerosis development compared to the placebo group. However, a significant decrease in SREBP-1 mRNA level and a significant increase in mRNA levels of LXR and CPY71a were observed in the chlorella group. Cholesterol and TG levels in each lipoprotein fraction did not differ between the two groups. On the other hand, thrombolysis in vivo was not significantly different between the two groups in terms of thrombus volume at 60 minutes after thrombus formation. However, a trend toward decreased PAI-1 and TAFI mRNA expression levels was observed in the chlorella group. Conclusion: Intake of chlorella as a food suggested an effect on cholesterol catabolism, increased bile acid synthesis, improved lipid metabolism, and inhibited the development of atherosclerosis. Furthermore, it was suggested that chlorella may suppress the expression of fibrinolytic inhibitory factor and enhance thrombolytic activity.
文摘AIM:To identify factors that influence long-term liver function following radiofrequency ablation(RFA)in patients with viral hepatitis-related hepatocellular carcinoma.METHODS:A total of 123 patients with hepatitis B virus-or hepatitis C virus-related hepatocellular carcinoma(HCC)(n=12 and n=111,respectively)were enrolled.Cumulative rates of worsening Child-Pugh(CP)scores(defined as a 2-point increase)were examined.RESULTS:CP score worsening was confirmed in 22patients over a mean follow-up period of 43.8±26.3mo.Multivariate analysis identified CP class,platelet count,and aspartate aminotransferase levels as significant predictors of a worsening CP score(P=0.000,P=0.011 and P=0.024,respectively).In contrast,repeated RFA was not identified as a risk factor for liver function deterioration.CONCLUSION:Long-term liver function following RFA was dependent on liver functional reserve,the degreeof fibrosis present,and the activity of the hepatitis condition for this cohort.Therefore,in order to maintain liver function for an extended period following RFA,suppression of viral hepatitis activity is important even after the treatment of HCC.
文摘Background: Recently, it has become apparent that reactive oxygen species (ROS) play a critical role in the initiation of atherosclerosis. In this study, the effect of radical scavenger edaravone to the leukocyte rolling and to the expression of adhesion molecules on microvascular endothelium was investigated. Methods: DSS induced rat colitis model was used as an inflammation model. Edaravone (10.5 mg/kg, Mitsubishi Tanabe Pharma Corporation, Japan) was used to examine the action of ROS. Images of leukocyte rolling in mesenteric microvessels were investigated in a fluorescence bio-imaging model. Each cross section from the target blood vessel (aotic root, aorta, superior mesenteric artery) were examined by immune-peroxidase staining with anti-P-selectin, E-selectin, ICAM-1 antibody using the streptavidin/biotinylated horseradish peroxidase method. Results: 1) Leukocyte rolling in mesenteric microvessels was significantly increased in colitis. The number of rolling leukocyte was significantly decreased in edaravone group than placebo group (501.3 ± 39.2 vs 252.2 ± 37.2 count/100 μm/10 min). 2) The expression of P-selectin in endothelial cell was significantly increased in colitis. However, this expression was decreased in edaravone group. 3) The expression of E-selectin was not induced to intact aortic root and aorta. In the superior mesenteric artery, the expression was induced by inflammation, and it was attenuated by edaravone. 4) There was little expression of ICAM-1 in both intact aortic root and aortas. While, in the superior mesenteric artery, the expression was confirmed only in placebo group in colitis, and it was attenuated in edaravone group. Conclusions: It was suggested that administration of edaravone led to improving a haemostasis of microcirculation based on down-regulation of adhesion molecules. These results support the evidence that ROS plays a critical role in micro- vascular dysfunction.
