AIM:To observe the hepatic injury induced by carbon dioxide pneumoperitoneum(CDP) in rabbits,compare the eects olow-and high-pressure pneumoperitoneum,and to determine the degree o hepatic injury induced by these two ...AIM:To observe the hepatic injury induced by carbon dioxide pneumoperitoneum(CDP) in rabbits,compare the eects olow-and high-pressure pneumoperitoneum,and to determine the degree o hepatic injury induced by these two clinically relevant CDP pressures.METHODS:Thirty healthy male New Zealand rabbits weighing 3.0 to 3.5 kg were randomly divided into three groups(n = 10 for each group) and subjected to the ollowing to CDP pressures:no gas control,10 mmHg,or 15 mmHg.Histological changes in liver tissues were observed with hematoxylin and eosin staining and transmission electron microscopy.Liver unction was evaluated using an automatic biochemical analyzer.Adenine nucleotide translocator(ANT) activity in liver tissue was detected with the atractyloside-inhibitor stop technique.Bax and Bcl-2 expression levels were detected bywestern blotting.RESULTS:Liver Functions in the 10 mmHg and 15 mmHg experimental groups were significantly disturbed compared with the control group.After CDP,the levels or alanine transaminase and aspartate transaminase were 77.3 ± 14.5 IU/L and 60.1 ± 11.4 IU/L,respectively,in the 10 mmHg experimental group and 165.1 ± 19.4 IU/L and 103.8 ± 12.3 IU/L,respectively,in the 15 mmHg experimental group,which were all higher than those of the control group(p < 0.05).There was no difference in pre-albumin concentration between the 10 mmHg experimental group and the control group,but the prealbumin level of the 15 mmHg experimental group was significantly lower than that of the control group(p < 0.05).No significant differences were observed in the levels of total bilirubin or albumin among the three groups.After 30 and 60 min of CDP,pH was reduced(p < 0.05) and fa CO2 was elevated(p < 0.05) in the 10 mmHg group compared with controls,and these changes were more pronounced in the 15 mmHg group.Hematoxylin and eosin staining showed no significant change in liver morphology,except for mild hyperemia in the two experimental groups.Transmission electron microscopy showed mild mitochondrial swelling in hepatocytes of the 10 mmHg group,and this was more pronounced in the 15 mmHg group.No significant difference in ANT levels was found between the control and 10 mmHg groups.However,ANT concentration was significantly lower in the 15 mmHg group compared with the control group.The expression of hepatic Bax was significantly increased in the two experimental groups compared with the controls,but there were no differences in Bcl-2 levels among the three groups.Twelve hours after CDP induction,the expression of hepatic Bax was more significant in the 15 mmHg group than in the 10 mmHg group.CONCLUSION:A CDP pressure of 15 mmHg caused more substantial hepatic injury,such as increased levels of acidosis,mitochondrial damage,and apoptosis;therefore,10 mmHg CDP is preferable for laparoscopic operations.展开更多
AIM:To observe the hepatic injury induced by carbon dioxide pneumoperitoneum in rats and to explore its potential mechanism. METHODS:Thirty healthy male SD rats were randomly divided into control group(n=10),0 h exper...AIM:To observe the hepatic injury induced by carbon dioxide pneumoperitoneum in rats and to explore its potential mechanism. METHODS:Thirty healthy male SD rats were randomly divided into control group(n=10),0 h experimental group(n=10)and 1 h experimental group(n=10)after sham operation with carbon dioxide pneumoperitoneum.Histological changes in liver tissue were observed with hematoxylineosin staining.Liver function was assayed with an automatic biochemical analyzer.Concentration of malonyldialdehyde(MDA)and activity of superoxide dismutase(SOD)were assayed by colorimetry.Activity of adenine nucleotide translocator in liver tissue was detected with the atractyloside-inhibitor stop technique.Expression of hypoxia inducible factor-1 (HIF-1) mRNA in liver tissue was detected with in situ hybridization. RESULTS:Carbon dioxide pneumoperitoneum for 60 min could induce liver injury in rats.Alanine aminotransferase and aspartate aminotransferase were 95.7±7.8 U/L and 86.8±6.9 U/L in 0 h experimental group,and 101.4±9.3 U/L and 106.6±8.7 U/L in 1 h experimental group.However,no significant difference was found in total billirubin,albumin,and pre-albumin in the three groups.In 0 h experimental group,the concentration of MDA was 9.83±2.53 μmol/g in liver homogenate and 7.64±2.19μmol/g in serum respectively,the activity of SOD was 67.58±9.75 nu/mg in liver and 64.47±10.23 nu/mg in serum respectively.In 1 h experimental group,the concentration of MDA was 16.57±3.45 μmol/g in liver tissue and 12.49±4.21μmol/g in serum respectively,the activity of SOD was 54.29± 7.96 nu/mg in liver tissue and 56.31±9.85 nu/mg in serum,respectively.The activity of ANT in liver tissue was 9.52±1.56 in control group,6.37±1.33 in 0 h experimental group and 7.28±1.45(10 -9 mol/min per gram protein)in 1 h experimental group,respectively. The expression of HIF-1 mRNA in liver tissue was not detected in control group,and its optical density difference value was 6.14±1.03 in 0 h experimental group and 9.51±1.74 in 1 h experimental group, respectively. CONCLUSION:Carbon dioxide pneumoperitoneum during the sham operation can induce hepatic injury in rats.The probable mechanisms of liver injury include anoxia,ischemia reperfusion and oxidative stress.Liver injury should be avoided during clinical laparoscopic operation with carbon dioxide pneumoperitoneum.展开更多
Background Chinese medicine plays an important role in hepatoprotective treatment. This study was conducted to investigate the protective effects of emodin and astragalus polysaccharides （APS） in a rat model of chro...Background Chinese medicine plays an important role in hepatoprotective treatment. This study was conducted to investigate the protective effects of emodin and astragalus polysaccharides （APS） in a rat model of chronic hepatic injury. Methods Chronic hepatic injury was induced by hypodermic injection of an olive oil solution containing 40% carbon tetrachlodde （CCI4） twice a week, in addition to a diet of 79.5% maizena, 20% fat, 0.5% cholesterol, and 10% alcohol in the drinking water ad libitum for 12 weeks. Meanwhile, the rats were exposed to different concentrations of emodin （40 mg·kg^-1·d^-1）, APS （200 mg·kg^-1·d^-1）, combination drug （emodin 40 mg·kg^-1·d^-1 combined with APS 200 mg·kg^-1·d^-1） and colchicine （0.1 mg·kg^-1·d^-1） in parallel by oral gavage （once a day for 12 weeks）. At the end of 12 weeks, blood serum and liver tissue were taken. Serum was collected to determine the levels of total bilirubin （TBIL）, alanine transaminase （ALT）, aspartate transaminose （AST）, and albumin （ALB）. Liver and spleen indexes were assayed, followed by the measurements of the liver associated enzyme superoxide dismutase （SOD） and malondialdehyde （MDA）. Histopathological changes were studied using optical microscopy. Results Splenohepatomegalia was alleviated and serum levels of TBIL and ALT were reduced in the groups treated with emodin and APS when compared to the control group. In addition, the ALB level in the APS and combination groups was higher. Similarly, the SOD activity of liver homogenates was significantly higher in the groups treated with emodin and APS, while administration of the herbal derivatives prevented the elevation in MDA levels. Histological analysis showed that the APS and combination groups significantly ameliorated the hepatic injury. Conclusions Co-administration of emodin and APS demonstrated a synergistic action in reducing ALT and restoring ALB in the serum from a rat model of chronic hepatic injury. Emodin and APS may ameliorate the CCI4-induced hepatic injury in rats by elevating antioxidant-enzyme activities and reducing lipid peroxidation.展开更多
目的:研究山药水提物(aqueous extract of Dioscorea batatas,DA)对四氯化碳(CCl4)造成的小鼠急性肝损伤的改善作用。方法:60只昆明小鼠随机均分为6组:正常对照组、造模组、阳性对照组(联苯双酯组)、不同提取工艺的山药水提物A、B、C组...目的:研究山药水提物(aqueous extract of Dioscorea batatas,DA)对四氯化碳(CCl4)造成的小鼠急性肝损伤的改善作用。方法:60只昆明小鼠随机均分为6组:正常对照组、造模组、阳性对照组(联苯双酯组)、不同提取工艺的山药水提物A、B、C组,用四氯化碳造成小鼠急性肝损伤模型,测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)、肝组织超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量。肝组织常规HE染色观察。结果:各组肝损伤模型小鼠经山药水提物A、B、C及联苯双酯干预后,血清ALT、AST水平与造模组相比显著降低(P<0.05),肝组织中SOD活性升高,MDA含量降低(P<0.05),镜检观察山药水提物A、B、C及联苯双酯组小鼠肝组织病理切片,发现山药水提物A、B、C及联苯双酯组较造模组肝组织损伤坏死明显减轻,坏死灶减少,范围减小,粒细胞浸润减少,并且山药水提物A组较B、C2组干预肝损伤效果好。结论:山药水提物能明显改善CCl4所致急性肝损伤小鼠的肝功能状况,其作用可能与抗氧化清除自由基、和增强机体清除自由基的能力有关。展开更多
基金Supported by The Eleventh-five Medical Science Fund of Chengdu Military Command Area,No. MB07011China Post doctoral Science Foundation,No. 20100471764
文摘AIM:To observe the hepatic injury induced by carbon dioxide pneumoperitoneum(CDP) in rabbits,compare the eects olow-and high-pressure pneumoperitoneum,and to determine the degree o hepatic injury induced by these two clinically relevant CDP pressures.METHODS:Thirty healthy male New Zealand rabbits weighing 3.0 to 3.5 kg were randomly divided into three groups(n = 10 for each group) and subjected to the ollowing to CDP pressures:no gas control,10 mmHg,or 15 mmHg.Histological changes in liver tissues were observed with hematoxylin and eosin staining and transmission electron microscopy.Liver unction was evaluated using an automatic biochemical analyzer.Adenine nucleotide translocator(ANT) activity in liver tissue was detected with the atractyloside-inhibitor stop technique.Bax and Bcl-2 expression levels were detected bywestern blotting.RESULTS:Liver Functions in the 10 mmHg and 15 mmHg experimental groups were significantly disturbed compared with the control group.After CDP,the levels or alanine transaminase and aspartate transaminase were 77.3 ± 14.5 IU/L and 60.1 ± 11.4 IU/L,respectively,in the 10 mmHg experimental group and 165.1 ± 19.4 IU/L and 103.8 ± 12.3 IU/L,respectively,in the 15 mmHg experimental group,which were all higher than those of the control group(p < 0.05).There was no difference in pre-albumin concentration between the 10 mmHg experimental group and the control group,but the prealbumin level of the 15 mmHg experimental group was significantly lower than that of the control group(p < 0.05).No significant differences were observed in the levels of total bilirubin or albumin among the three groups.After 30 and 60 min of CDP,pH was reduced(p < 0.05) and fa CO2 was elevated(p < 0.05) in the 10 mmHg group compared with controls,and these changes were more pronounced in the 15 mmHg group.Hematoxylin and eosin staining showed no significant change in liver morphology,except for mild hyperemia in the two experimental groups.Transmission electron microscopy showed mild mitochondrial swelling in hepatocytes of the 10 mmHg group,and this was more pronounced in the 15 mmHg group.No significant difference in ANT levels was found between the control and 10 mmHg groups.However,ANT concentration was significantly lower in the 15 mmHg group compared with the control group.The expression of hepatic Bax was significantly increased in the two experimental groups compared with the controls,but there were no differences in Bcl-2 levels among the three groups.Twelve hours after CDP induction,the expression of hepatic Bax was more significant in the 15 mmHg group than in the 10 mmHg group.CONCLUSION:A CDP pressure of 15 mmHg caused more substantial hepatic injury,such as increased levels of acidosis,mitochondrial damage,and apoptosis;therefore,10 mmHg CDP is preferable for laparoscopic operations.
基金Supported by The Eleventh-five Medical Science Fund of Chengdu Military Command Area,NoMB07011
文摘AIM:To observe the hepatic injury induced by carbon dioxide pneumoperitoneum in rats and to explore its potential mechanism. METHODS:Thirty healthy male SD rats were randomly divided into control group(n=10),0 h experimental group(n=10)and 1 h experimental group(n=10)after sham operation with carbon dioxide pneumoperitoneum.Histological changes in liver tissue were observed with hematoxylineosin staining.Liver function was assayed with an automatic biochemical analyzer.Concentration of malonyldialdehyde(MDA)and activity of superoxide dismutase(SOD)were assayed by colorimetry.Activity of adenine nucleotide translocator in liver tissue was detected with the atractyloside-inhibitor stop technique.Expression of hypoxia inducible factor-1 (HIF-1) mRNA in liver tissue was detected with in situ hybridization. RESULTS:Carbon dioxide pneumoperitoneum for 60 min could induce liver injury in rats.Alanine aminotransferase and aspartate aminotransferase were 95.7±7.8 U/L and 86.8±6.9 U/L in 0 h experimental group,and 101.4±9.3 U/L and 106.6±8.7 U/L in 1 h experimental group.However,no significant difference was found in total billirubin,albumin,and pre-albumin in the three groups.In 0 h experimental group,the concentration of MDA was 9.83±2.53 μmol/g in liver homogenate and 7.64±2.19μmol/g in serum respectively,the activity of SOD was 67.58±9.75 nu/mg in liver and 64.47±10.23 nu/mg in serum respectively.In 1 h experimental group,the concentration of MDA was 16.57±3.45 μmol/g in liver tissue and 12.49±4.21μmol/g in serum respectively,the activity of SOD was 54.29± 7.96 nu/mg in liver tissue and 56.31±9.85 nu/mg in serum,respectively.The activity of ANT in liver tissue was 9.52±1.56 in control group,6.37±1.33 in 0 h experimental group and 7.28±1.45(10 -9 mol/min per gram protein)in 1 h experimental group,respectively. The expression of HIF-1 mRNA in liver tissue was not detected in control group,and its optical density difference value was 6.14±1.03 in 0 h experimental group and 9.51±1.74 in 1 h experimental group, respectively. CONCLUSION:Carbon dioxide pneumoperitoneum during the sham operation can induce hepatic injury in rats.The probable mechanisms of liver injury include anoxia,ischemia reperfusion and oxidative stress.Liver injury should be avoided during clinical laparoscopic operation with carbon dioxide pneumoperitoneum.
基金This study was supported by a grant from the National Natural Science Foundation of China （No. 30472266）.
文摘Background Chinese medicine plays an important role in hepatoprotective treatment. This study was conducted to investigate the protective effects of emodin and astragalus polysaccharides （APS） in a rat model of chronic hepatic injury. Methods Chronic hepatic injury was induced by hypodermic injection of an olive oil solution containing 40% carbon tetrachlodde （CCI4） twice a week, in addition to a diet of 79.5% maizena, 20% fat, 0.5% cholesterol, and 10% alcohol in the drinking water ad libitum for 12 weeks. Meanwhile, the rats were exposed to different concentrations of emodin （40 mg·kg^-1·d^-1）, APS （200 mg·kg^-1·d^-1）, combination drug （emodin 40 mg·kg^-1·d^-1 combined with APS 200 mg·kg^-1·d^-1） and colchicine （0.1 mg·kg^-1·d^-1） in parallel by oral gavage （once a day for 12 weeks）. At the end of 12 weeks, blood serum and liver tissue were taken. Serum was collected to determine the levels of total bilirubin （TBIL）, alanine transaminase （ALT）, aspartate transaminose （AST）, and albumin （ALB）. Liver and spleen indexes were assayed, followed by the measurements of the liver associated enzyme superoxide dismutase （SOD） and malondialdehyde （MDA）. Histopathological changes were studied using optical microscopy. Results Splenohepatomegalia was alleviated and serum levels of TBIL and ALT were reduced in the groups treated with emodin and APS when compared to the control group. In addition, the ALB level in the APS and combination groups was higher. Similarly, the SOD activity of liver homogenates was significantly higher in the groups treated with emodin and APS, while administration of the herbal derivatives prevented the elevation in MDA levels. Histological analysis showed that the APS and combination groups significantly ameliorated the hepatic injury. Conclusions Co-administration of emodin and APS demonstrated a synergistic action in reducing ALT and restoring ALB in the serum from a rat model of chronic hepatic injury. Emodin and APS may ameliorate the CCI4-induced hepatic injury in rats by elevating antioxidant-enzyme activities and reducing lipid peroxidation.
文摘目的:研究山药水提物(aqueous extract of Dioscorea batatas,DA)对四氯化碳(CCl4)造成的小鼠急性肝损伤的改善作用。方法:60只昆明小鼠随机均分为6组:正常对照组、造模组、阳性对照组(联苯双酯组)、不同提取工艺的山药水提物A、B、C组,用四氯化碳造成小鼠急性肝损伤模型,测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)、肝组织超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量。肝组织常规HE染色观察。结果:各组肝损伤模型小鼠经山药水提物A、B、C及联苯双酯干预后,血清ALT、AST水平与造模组相比显著降低(P<0.05),肝组织中SOD活性升高,MDA含量降低(P<0.05),镜检观察山药水提物A、B、C及联苯双酯组小鼠肝组织病理切片,发现山药水提物A、B、C及联苯双酯组较造模组肝组织损伤坏死明显减轻,坏死灶减少,范围减小,粒细胞浸润减少,并且山药水提物A组较B、C2组干预肝损伤效果好。结论:山药水提物能明显改善CCl4所致急性肝损伤小鼠的肝功能状况,其作用可能与抗氧化清除自由基、和增强机体清除自由基的能力有关。
