BACKGROUND： Pancreaticobiliary maljunction is a high risk factor of pancreatitis and biliary tract cancer. How this maljunction affects the liver remains obscure. This study aimed to examine the effects of pancreatic...BACKGROUND： Pancreaticobiliary maljunction is a high risk factor of pancreatitis and biliary tract cancer. How this maljunction affects the liver remains obscure. This study aimed to examine the effects of pancreaticobiliary maljunction on the liver, pancreas and gallbladder in a cat model.METHODS： A model of choledocho-pancreatic side-to-side ductal anastomosis was created in ten cats. Before the procedure,a small piece of tissue from the liver, pancreas and gallbladder was collected as a control. The common channel formation was checked by cholecystography. The livers, pancreases and gallbladders of these cats were harvested for histological examination. The expression of proliferating cell nuclear antigen in the gallbladder was examined with immunohistochemistry. RESULTS： Seven of the 10 cats survived for 6 months after surgery. The color of the liver was darker in the PBM model than the control specimen, with nodules on the surface. Histological examination showed ballooning changes and inflammatory infiltrations and the histopathological score increased significantly（P〈0.05）. Also, mitochondria swelling and lipid droplet in cytoplasm were observed under an electron microscope. The pancreas also appeared darker in the PBM model than the control specimen and dilated pancreatic ducts were found in three cats. Histopathological examination revealed vascular proliferation and inflammatory infiltration with numerous neutrophils. Gallbladder epithelial cells were featured by expanded endoplasmic reticulum, increased intercellular space and cellular nucleus deformation. The positive cells ofproliferating cell nuclear antigen were increased significantly（P〈0.05）. CONCLUSION： The present study demonstrated that pancreaticobiliary maljunction can lead to the injuries of the liver, pancreas and gallbladder.展开更多
AIM: To determine the hypothesis that inflating the balloons in the duodenal papilla determines changes in the biochemical markers of pancreatitis.METHODS: Four groups of pigs were used: Group papilla(GP), the overtub...AIM: To determine the hypothesis that inflating the balloons in the duodenal papilla determines changes in the biochemical markers of pancreatitis.METHODS: Four groups of pigs were used: Group papilla(GP), the overtube's balloon was inflated in the area of the papilla; GP + double balloon enteroscopy(GP + DBE), the overtube's balloon was kept inflated in the area of the papilla for 20 min before a DBE; Group DBE(GDBE), DBE was carried out after insuring the balloon's inflation far from the pancreatic papilla; and Group control(GC). Serum concentrations of amylase, lipase and C-reactive protein(CRP) were evaluated. Pancreases were processed for histopathology examination.RESULTS: Main changes occurred 24 h after the procedure compared with baseline levels. Amylase levels increased significantly in GP(59.2% higher) and were moderately higher in groups GP + DBE and GDBE(22.7% and 20%, respectively). Lipase increased in GP and GP + DBE, whereas it hardly changed in GDBE and in GC. CRP increased significantly in GP, GP + DBE and GDBE, while no changes were reported for GC. No statistically significant difference between groups GP and GP + DBE was found for the histopathological findings, except for vacuolization and necrosis of the pancreatic parenchyma that was higher in GP than in GP + DBE.CONCLUSION: The manipulation of the duodenal papilla by the inflated overtube's balloon during DBE causes pancreatic structural damage and increased biochemical markers associated with pancreatitis.展开更多
目的建立新西兰兔股动脉粥样硬化改良模型,探讨其可行性并与传统造模方法进行比较。方法西兰兔通过高脂饲料饲养后,在X线透视下经颈动脉行股动脉球囊损伤,建立改良动脉粥样硬化模型。与传统造模方法相比,评判造模前后的冠状动脉造影血...目的建立新西兰兔股动脉粥样硬化改良模型,探讨其可行性并与传统造模方法进行比较。方法西兰兔通过高脂饲料饲养后,在X线透视下经颈动脉行股动脉球囊损伤,建立改良动脉粥样硬化模型。与传统造模方法相比,评判造模前后的冠状动脉造影血流分级(Thrombolysis in Myocardial Infarction,TIMI)评分、管腔内径,血管内膜厚度和泡沫细胞阳性面积的变化,以及血凝血酶原时间(Prothrombin Time,PT)值的变化。结果与对照组比较,改良模型组的股动脉管腔内径显著狭窄(P<0.001),其狭窄程度与动脉内膜增厚程度存在相关性(r=-0.753)。同时,血管内膜泡沫细胞阳性面积率显著增多(P=0.018)。该变化与传统造模组相比,更为显著。结论改良法建立粥样斑块模型不但具有可行性,而且可控程度高、易重复。这种造模方法可以通过微创技术TIMI评分与血液生化学进行评价;与传统模型相比,更有助于进一步阐明不稳定斑块的机制。展开更多
基金supported by grants from the Experimental Animal Special Purpose Foundation of Science and Technology Commission of Shanghai Municipality (13140902901)the Technology Development Foundation of Pudong District (PKJ2013-Y67)
文摘BACKGROUND： Pancreaticobiliary maljunction is a high risk factor of pancreatitis and biliary tract cancer. How this maljunction affects the liver remains obscure. This study aimed to examine the effects of pancreaticobiliary maljunction on the liver, pancreas and gallbladder in a cat model.METHODS： A model of choledocho-pancreatic side-to-side ductal anastomosis was created in ten cats. Before the procedure,a small piece of tissue from the liver, pancreas and gallbladder was collected as a control. The common channel formation was checked by cholecystography. The livers, pancreases and gallbladders of these cats were harvested for histological examination. The expression of proliferating cell nuclear antigen in the gallbladder was examined with immunohistochemistry. RESULTS： Seven of the 10 cats survived for 6 months after surgery. The color of the liver was darker in the PBM model than the control specimen, with nodules on the surface. Histological examination showed ballooning changes and inflammatory infiltrations and the histopathological score increased significantly（P〈0.05）. Also, mitochondria swelling and lipid droplet in cytoplasm were observed under an electron microscope. The pancreas also appeared darker in the PBM model than the control specimen and dilated pancreatic ducts were found in three cats. Histopathological examination revealed vascular proliferation and inflammatory infiltration with numerous neutrophils. Gallbladder epithelial cells were featured by expanded endoplasmic reticulum, increased intercellular space and cellular nucleus deformation. The positive cells ofproliferating cell nuclear antigen were increased significantly（P〈0.05）. CONCLUSION： The present study demonstrated that pancreaticobiliary maljunction can lead to the injuries of the liver, pancreas and gallbladder.
基金Supported by the Project 12024/PI/09(Fundacion SenecaComunidad Autonoma de la Region de MurciaSpain)
文摘AIM: To determine the hypothesis that inflating the balloons in the duodenal papilla determines changes in the biochemical markers of pancreatitis.METHODS: Four groups of pigs were used: Group papilla(GP), the overtube's balloon was inflated in the area of the papilla; GP + double balloon enteroscopy(GP + DBE), the overtube's balloon was kept inflated in the area of the papilla for 20 min before a DBE; Group DBE(GDBE), DBE was carried out after insuring the balloon's inflation far from the pancreatic papilla; and Group control(GC). Serum concentrations of amylase, lipase and C-reactive protein(CRP) were evaluated. Pancreases were processed for histopathology examination.RESULTS: Main changes occurred 24 h after the procedure compared with baseline levels. Amylase levels increased significantly in GP(59.2% higher) and were moderately higher in groups GP + DBE and GDBE(22.7% and 20%, respectively). Lipase increased in GP and GP + DBE, whereas it hardly changed in GDBE and in GC. CRP increased significantly in GP, GP + DBE and GDBE, while no changes were reported for GC. No statistically significant difference between groups GP and GP + DBE was found for the histopathological findings, except for vacuolization and necrosis of the pancreatic parenchyma that was higher in GP than in GP + DBE.CONCLUSION: The manipulation of the duodenal papilla by the inflated overtube's balloon during DBE causes pancreatic structural damage and increased biochemical markers associated with pancreatitis.
文摘目的建立新西兰兔股动脉粥样硬化改良模型,探讨其可行性并与传统造模方法进行比较。方法西兰兔通过高脂饲料饲养后,在X线透视下经颈动脉行股动脉球囊损伤,建立改良动脉粥样硬化模型。与传统造模方法相比,评判造模前后的冠状动脉造影血流分级(Thrombolysis in Myocardial Infarction,TIMI)评分、管腔内径,血管内膜厚度和泡沫细胞阳性面积的变化,以及血凝血酶原时间(Prothrombin Time,PT)值的变化。结果与对照组比较,改良模型组的股动脉管腔内径显著狭窄(P<0.001),其狭窄程度与动脉内膜增厚程度存在相关性(r=-0.753)。同时,血管内膜泡沫细胞阳性面积率显著增多(P=0.018)。该变化与传统造模组相比,更为显著。结论改良法建立粥样斑块模型不但具有可行性,而且可控程度高、易重复。这种造模方法可以通过微创技术TIMI评分与血液生化学进行评价;与传统模型相比,更有助于进一步阐明不稳定斑块的机制。
