|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Effect of bombesin and neurotensin on gut barrier function in partially hepatectomized rats显示文摘AIM: To investigate the effect of regulatory peptides bombesin (BBS) and neurotensin (NT) on intestinal barrier function in partially hepatectomized rats.METHODS: Ninety male Wistar rats were randomly divided into five groups: Ⅰ (n = 10): controls, Ⅱ (n =20): sham operated, Ⅲ (n = 20): partial hepatectomy 70% (PHx), Ⅳ (n = 20): PHx+BBS (30 μg/kg/d), Ⅴ (n= 20): PHx+NT (300 μg/kg/d). Groups Ⅳ and Ⅴ were treated for 8 days before PHx and 48 h post surgery.At the end of the experiment, on day 10, intestinal barrier function was assessed by measuring endotoxin concentrations in portal and aortic blood. Tissue sections of the terminal ileum were examined histologically and villus density, mucosal thickness, mitotic activity and apoptosis in crypts were assessed. In addition, ileal mucosa was analyzed for DNA and protein content and microbiological analysis was performed in cecal contents.To estimate intestinal oxidative stress, lipid peroxidation was determined on tissue homogenates from terminal ileum.RESULTS: BBS or NT administration significantly reduced portal and systemic endotoxemia observed 48 h after partial hepatectomy. In hepatectomized rats (group Ⅲ), a trend towards induction of mucosal atrophy was observed, demonstrated by the reduction of villus density, mucosal thickness, protein content and significant reduction of DNA, while these alterations were reversed by regulatory peptides administration.This trophic effect of BBS and NT was accompanied by induction of mitoses above control levels and a significant reduction of apoptosis in intestinal crypts.Intestinal lipid peroxidation was found significantly lower in PHx group and regulatory peptides exerted an antioxidant action, further decreasing this parameter of oxidative stress. The bacterial population of E. coli and aerobic Gram (+) cocci was increased in cecal content of hepatectomized rats, while this parameter was not affected by the administration of BBS or NT.CONCLUSION: Gut regulatory peptides BBS and NT improve intestinal barrier function and reduce endotoxemia in experimental partial hepatectomy. This effect is, at least in part, mediated by their trophic,antiapoptotic, mitogenic, and antioxidant effect on the intestinal epithelium. This observation might be of potential value in patients undergoing liver resection. | Stelios F Assimakopoulos Ilias H Alexandris Chrisoula D Scopa Panagiotis G Mylonas Konstantinos C Thomopoulos Christos D Georgiou Vassiliki N Nikolopoulou Constantine E Vagianos | 2005 | World Journal of Gastroenterology2005，11，43： | 8 |
| 2 | Intestinal barrier dysfunction in cirrhosis: Current concepts in pathophysiology and clinical implications显示文摘The intestinal lumen is a host place for a wide range of microbiota and sets a unique interplay between local immune system, inflammatory cells and intestinal epithelium, forming a physical barrier against microbial invaders and toxins. Bacterial translocation is the migration of viable or nonviable microorganisms or their pathogen-associated molecular patterns, such as lipopolysaccharide, from the gut lumen to the mesenteric lymph nodes, systemic circulation and other normally sterile extraintestinal sites. A series of studies have shown that translocation of bacteria and their products across the intestinal barrier is a commonplace in patients with liver disease. The deterioration of intestinal barrier integrity and the consulting increased intestinal permeability in cirrhotic patients play a pivotal pathophysiological role in the development of severe complications as high rate of infections, spontaneous bacterial peritonitis, hepatic encephalopathy, hepatorenal syndrome, variceal bleeding, progression of liver injury and hepatocellular carcinoma. Nevertheless, the exact cellular and molecular mechanisms implicated in the phenomenon of microbial translocation in liver cirrhosis have not been fully elucidated yet. | Georgios I Tsiaoussis Stelios F Assimakopoulos Athanassios C Tsamandas Christos K Triantos Konstantinos C Thomopoulos | 2015 | World Journal of Hepatology2015，7，17： | 4 |
| 3 | Stimulation of oval cell and hepatocyte proliferation by exogenous bombesin and neurotensin in partially hepatectomized rats显示文摘AIM:To investigate the effect of the neuropeptides bombesin(BBS)and neurotensin(NT)on oval cell proliferation in partially hepatectomized rats not pretreated with a known hepatocyte inhibitor.METHODS:Seventy male Wistar rats were randomly divided into five groups:Ⅰ=controls,Ⅱ=sham operated,Ⅲ=partial hepatectomy 70%(PHx),Ⅳ=PHx+ BBS(30μg/kg per day),Ⅴ=PHx+NT(300μg/kg per day).Forty eight hours after liver resection,portal en-dotoxin levels and hepatic glutathione redox state were determined.α-fetoprotein(AFP)mRNA(in situ hybridisation),cytokeratin-19 and Ki67 antigen expression (immunohistochemistry)and apoptosis(TUNEL)were evaluated on liver tissue samples.Cells with morphological features of oval cells that were cytokeratin-19 (+)and AFP mRNA(+)were scored in morphometric analysis and their proliferation was recorded.In addition,the proliferation and apoptotic rates of hepatocytes were determined.RESULTS:In the control and sham operated groups,oval cells were significantly less compared to groups Ⅲ,ⅣandⅤ(P<0.001).The neuropeptides BBS and NT significantly increased the proliferation of oval cells compared to groupⅢ(P<0.001).In addition,BBS and NT induced a significant increase of hepatocyte proliferation(P<0.001),whereas it decreased their apoptotic activity(P<0.001)compared to groupⅢ.BBS and NT significantly decreased portal endotoxemia (P<0.001)and increased the hepatic GSH:GSSG ratio (P<0.05 and P<0.001,respectively)compared to groupⅢ.CONCLUSION:BBS and NT stimulated oval cell proliferation in a model of liver regeneration,without use of concomitant suppression of hepatocyte proliferation as oval cell activation stimuli,and improved the hepatocyte regenerative response.This peptides-induced combined stimulation of oval cell and hepatocyte proliferation might serve as a possible treatment modality for several liver diseases. | Stelios F Assimakopoulos Athanassios C Tsamandas Ilias H Alexandris Christos Georgiou Constantine E Vagianos Chrisoula D Scopa | 2011 | World Journal of Gastrointestinal Pathophysiology2011，2，6： | 2 |
| 4 | A rare etiology of post-endoscopic retrograde cholangiopancreatography pneumoperitoneum显示文摘Major complications of endoscopic retrograde cholangiopancreatography (ERCP) include pancreatitis, hemorrhage, cholangitis, and duodenal perforation. The occurrence of free air in the peritoneal cavity post- ERCP is a rare event (< 1%), which is usually the result of duodenal or ductal perforation related to therapeutic ERCP with sphincterotomy. We describe for the first time a different aetiology of pneumoperitoneum, in an 84-year-old woman with pancreatic cancer and a large hepatic metastasis, after ERCP with common bile duct stent deployment. Our patient developed, pneumoperitoneum due to air leakage from rupture of intrahepatic bile ducts and Glisson’s capsule in the area of a peripheral large hepatic metastasis. The potential mechanism underlying this complication might be post- ERCP pneumobilia and increased pressure of intrahepatic bile ducts leading to rupture of intrahepatic bile ducts in the liver metastatic mass owing to neoplastic tissue friability. This case indicates the need for close clinical and radiological observation of patients with hepatic masses (primary or metastatic) subjected to ERCP. In such patients, avoidance of excessive air insufflation during ERCP and/or placement of a nasogastric tube for bowel decompression immediately after ERCP might be a reasonable strategy to prevent such unusual complications. | Stelios F Assimakopoulos Konstantinos C Thomopoulos Sofia Giali Christos Triantos Dimitrios Siagris Charalambos Gogos | 2008 | World Journal of Gastroenterology2008，14，18： | 2 |
| 5 | Interleukin 12/interleukin 23 pathway: Biological basis and therapeutic effect in patients with Crohn's disease显示文摘Considering that both innate and adaptive immune responses are involved in the pathogenesis of Crohn's disease(CD), novel therapeutic options have significantly been developed. Biological agents represent an important addition to the conventional treatments for immuno-inflammatory conditions, acting as antagonists of adhesion molecules or various inflammatory cytokines. The interleukin 12(IL-12)/IL-23 common pathway has been found to play a determinant role in the induction of inflammation in adaptive immune responses. In particular, IL-23 promotes the differentiation of na?ve T helper cells into Th17 phenotype with the concomitant secretion of several inflammatory cytokines such as IL-17 and IL-22, whereas IL-12 induces the Th1 polarization and production of critical cytokines such as interferon-γ and tumor necrosis factor. Nowadays, there is increased interest regarding the role of IL-23 as a therapeutic target of CD through the blockage of IL-23 mediated pathways. In this editorial, we focus on the role of IL-12/IL-23 pathway in the regulation of mucosal immunity and in the induction and maintenance of chronic inflammation. In parallel, we critically discuss the available data regarding the therapeutic effect of the IL-12/IL-23 inhibitors and especially of ustekinumab, a human monoclonal antibody which has been recently approved by the United States Food and Drug Administration for the management of moderateto-severe CD and its potential to be used as first-line therapy in everyday clinical practice. | Ioanna Aggeletopoulou Stelios F Assimakopoulos Christos Konstantakis Christos Triantos | 2018 | World Journal of Gastroenterology2018，24，36： | 2 |
| 6 | ln vivo and in vitro studies on the anticancer activity of Copaifera multijuga Hayne and its fractions显示文摘 | Lima S R M Junior V F V Christo H B | 2003 | Phytotherapy Research2003，17，9： | 1 |
| 7 | An Instrument to Measure Satisfaction with Transaction Specific Service Recovery 显示文摘 | BOSHOF F CHRISTO | 1999 | Journal of Ser- vice Research1999，1，3： | 1 |
| 8 | Synthesis, design and operation optimization of a marine energy system 显示文摘 | GEORGE G D ARISTOTELIS V K CHRISTOS A F | 2008 | Energy2008，33，2： | 1 |
| 9 | On power-law relationship of the Internet topology显示文摘 | F Michalis F Petros F Christos | 1999 | Computer Communications Review1999，29，1： | 1 |
| 10 | Modeling turbulent reacting jets issuing into a hot and diluted coflow 显示文摘 | CHRISTO F C DALLY B B | 2005 | Combustion and Flame2005，142，1： | 1 |
| 11 | Modeling turbulent reacting jets issuing into a hot and diluted coflow显示文摘 | Christo F C Dally B B | | 0，，1： | 1 |
| 12 | Ankle-brachial index as a predictor of the extent of coronary atherosclerosis and cardiovascular events in patients with coronary artery disease显示文摘 | Christos M Papamichael John P Lekakis Kimon S Stamatelopoulos Theodoros G Papaioannou Maria K Alevizaki Adriana T Cimponeriu John E Kanakakis Aggeliki Papapanagiotou Anastasios Th Kalofoutis Stamatios F Stamatelopoulos | 2000 | The American Journal of Cardiology2000，，6： | 1 |
| 13 | Modeling turbulent reacting jets issuing into a hot and diluted coflow显示文摘 | Christo F C Dally B B | 2005 | Combustion and Flame2005，142，12： | 1 |
| 14 | Computer-supported collaborative concept mapping:Study of synchronous peer interaction显示文摘 | Vassilis K Nikolaos A Christos F | 2002 | Journal of Education and Information Technologies2002，7，2： | 1 |
| 15 | Mechanical Stress Is Required for High - Level Expression of Connective Tissue Growth Factor Christ of Schild and Beat Truebl 显示文摘 | CHRISTO F SCHILD C TRUEB B | 2002 | Experimental Cell Research2002，，274： | 1 |
| 16 | Free-riding and whitewashing in peer to-peer systems显示文摘 | MICHAL F CHRISTOS P JOHN C | 2006 | IEEE Journal on Selected Areas In Communications2006，，5： | 1 |
| 17 | Efficient similarity search in sequence databases 显示文摘 | Rakesh A Christos F Arun S | 1993 | Lecture Notes in Computer Sci- ence1993，730，： | 1 |
| 18 | Scaled self-organi- zing map-Hidden markov model architecture for bio- logical sequence clustering显示文摘 | Christos F Georgios S Andreas S | 2013 | Applied Artificial Intel- ligence2013，27，6： | 1 |
| 19 | Charge storage at the Pt/YSZ interface显示文摘 | Gy?rgy Fóti Arnaud Jaccoud Cyril Falgairette Christos Comninellis | 2009 | Journal of Electroceramics (-)2009，，2： | 1 |
| 20 | Fatigue behavior of RC beams strengthened with GFRP sheets显示文摘 | Papakonstantinou Christos G Petrou Michael F Harries Kent A | 2001 | J Compos for Constr2001，5，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员