BACKGROUND：Triggering receptor expressed on myeloid cells-1 （TREM-1） in the intestine was upregulated and correlated with disease activity in inflammatory bowel diseases. Membrane- bound TREM-1 protein is increased...BACKGROUND：Triggering receptor expressed on myeloid cells-1 （TREM-1） in the intestine was upregulated and correlated with disease activity in inflammatory bowel diseases. Membrane- bound TREM-1 protein is increased in the pancreas, liver and kidneys of patients with severe acute pancreatitis （SAP）, suggesting that TREM-1 may act as an important mediator of inflammation and subsequent extra-pancreatic organ injury. This study aimed to investigate the relationship between the expression of TREM-1 in intestinal tissue and intestinal barrier dysfunction in SAP. METHODS： Sixty-four male Wistar rats were randomly divided into a sham operation group （SO group, n=32） and a SAP group （n=32）. A SAP model was established by retrograde injection of 5% sodium deoxycholate into the bile-pancreatic duct. Specimens were taken from blood and intestinal tissue 2, 6, 12, and 48 hours after operation respectively. The levels of D-lactate, diamine oxidase （DAO） and endotoxin in serum were measured using an improved spectro-photometric method. The expression levels of TREM-1, interleukin-1β （IL-1β）, and tumor necrosis factor-α （TNF-α） mRNA in terminal ileum were detected by real-time reverse transcription-polymerase chain reaction （RT-PCR）. Specimens of the distal ileum were taken to determine pathological changes by a validated histology score. The serum levels of D-lactate, DAO and endotoxin were significantly increased in each subgroup of SAP compared with the SO group （P〈0.01, P〈0.05）. The expression levels of TREM-1, IL-1β and TNF-a mRNA in the terminal ileum in each subgroup of SAP were significantly higher than those in the SO group （P〈0.01, P〈0.05）. The expression level of TREM-lmRNA was positively correlated with IL-1βand TNF-α mRNA （r=0.956, P=0.044; r=0.986, P=0.015）, but the correlation was not found between IL-1β mRNA and TNF-a mRNA （P=0.133）. Compared to the SO group, the pathological changes were aggravated significantly in the SAP group. CONCLUSIONS： The expression level of TREM-1 in intestinal tissue of rats with SAP was elevated, leading to the release of inflammatory mediators and intestinal mucosal injury. This finding indicates that TREM-I might play an important role in the development of intestinal barrier dysfunction in rats with SAP.展开更多
Objective： To study whether the anti-AS effect of ginkgo biloba extract （GbE） was related with inhibitory effects on the expression of IL-1β, TNF-α and up-regulation of IL-10 and IL-10R in the heart of atheroscle...Objective： To study whether the anti-AS effect of ginkgo biloba extract （GbE） was related with inhibitory effects on the expression of IL-1β, TNF-α and up-regulation of IL-10 and IL-10R in the heart of atherosclerotic （AS） rats. Methods： The experimental model of AS rats were established by intraperitioneal injection of vitamin D3 with high fat and cholesterol diet. All rats were divided into 3 groups： control, AS and GbE. GbE （100 mg/kg） was administered to rats by ig. After 8 weeks, the expression of IL-1β, TNF-α, IL-10, and IL-10R in the heart of AS rats were detected by enzyme-linked immunosorbant assay, reverse transcriptase polymerasechain reaction and Western blotting. Results： The protein and mRNA expressions of IL-1β, TNF-α, IL-10 and IL-10R were markedly higher in AS group than those in control group （P〈0.01）. The protein and mRNA expressions of IL-1β and TNF-α were markedly lower in GbE group than those in AS group; while the protein and mRNA expressions of IL-10 and IL-10R were markedly higher in GbE group than those in AS group （P〈0.01）. Conclusion： GbE has significant inhibitory effects on proinflammatory cytokine IL-1β, TNF-α. The up-regulation of anti-inflammatory cytokine IL-10, IL-10R that may he partially responsible for its anti-AS effects.展开更多
Objective To investigate the relationship between peritoneal macrophages(PMAs)and inflammatory reaction in a rat model of severe acute pancreatitis(SAP).Methods Sprague-Dawley rats were randomly divided into control g...Objective To investigate the relationship between peritoneal macrophages(PMAs)and inflammatory reaction in a rat model of severe acute pancreatitis(SAP).Methods Sprague-Dawley rats were randomly divided into control group and SAP group.To induce SAP in rats,40 g/L sodium taurocholate(0.1 mL/100 g)was injected into the pancreatic duct through retrograde exposure of pancreatic bile duct in hepatic porta.One-third of rats were sacrificed at 3,6 or 12 h after modeling.PMAs were extracted,and incubated for 24 h in a humidified 5% carbon dioxide incubator.The expressions of tumor necrosis factor alpha(TNF-α)and interleukin-1β(IL-1β)mRNA in PMAs were measured by semi-quantitative RT-PCR.The levels of TNF-α and IL-1β in culture medium and serum were evaluated.The histological changes of pancreas were examined.Results The expressions of TNF-α mRNA and IL-1β mRNA in PMAs were significantly higher in SAP group than in control group at each time point(P<0.01).The concentrations of TNF-α and IL-1β in culture medium and serum were significantly elevated in SAP group compared with control group(P<0.01).The histological analysis of pancreas indicated that the damage was more severe in SAP group than in control group(P<0.01).Conclusion PMAs secrete cytokines into pancreatitis-associated ascitic fluid,and this study demonstrates a correlation between SAP and the activation of PMAs.展开更多
基金The study was supported by a grant from the National Natural Science Foundation of China （81070287）.
文摘BACKGROUND：Triggering receptor expressed on myeloid cells-1 （TREM-1） in the intestine was upregulated and correlated with disease activity in inflammatory bowel diseases. Membrane- bound TREM-1 protein is increased in the pancreas, liver and kidneys of patients with severe acute pancreatitis （SAP）, suggesting that TREM-1 may act as an important mediator of inflammation and subsequent extra-pancreatic organ injury. This study aimed to investigate the relationship between the expression of TREM-1 in intestinal tissue and intestinal barrier dysfunction in SAP. METHODS： Sixty-four male Wistar rats were randomly divided into a sham operation group （SO group, n=32） and a SAP group （n=32）. A SAP model was established by retrograde injection of 5% sodium deoxycholate into the bile-pancreatic duct. Specimens were taken from blood and intestinal tissue 2, 6, 12, and 48 hours after operation respectively. The levels of D-lactate, diamine oxidase （DAO） and endotoxin in serum were measured using an improved spectro-photometric method. The expression levels of TREM-1, interleukin-1β （IL-1β）, and tumor necrosis factor-α （TNF-α） mRNA in terminal ileum were detected by real-time reverse transcription-polymerase chain reaction （RT-PCR）. Specimens of the distal ileum were taken to determine pathological changes by a validated histology score. The serum levels of D-lactate, DAO and endotoxin were significantly increased in each subgroup of SAP compared with the SO group （P〈0.01, P〈0.05）. The expression levels of TREM-1, IL-1β and TNF-a mRNA in the terminal ileum in each subgroup of SAP were significantly higher than those in the SO group （P〈0.01, P〈0.05）. The expression level of TREM-lmRNA was positively correlated with IL-1βand TNF-α mRNA （r=0.956, P=0.044; r=0.986, P=0.015）, but the correlation was not found between IL-1β mRNA and TNF-a mRNA （P=0.133）. Compared to the SO group, the pathological changes were aggravated significantly in the SAP group. CONCLUSIONS： The expression level of TREM-1 in intestinal tissue of rats with SAP was elevated, leading to the release of inflammatory mediators and intestinal mucosal injury. This finding indicates that TREM-I might play an important role in the development of intestinal barrier dysfunction in rats with SAP.
基金Supported by the National Natural Science Foundation of China (No. 30271509)
文摘Objective： To study whether the anti-AS effect of ginkgo biloba extract （GbE） was related with inhibitory effects on the expression of IL-1β, TNF-α and up-regulation of IL-10 and IL-10R in the heart of atherosclerotic （AS） rats. Methods： The experimental model of AS rats were established by intraperitioneal injection of vitamin D3 with high fat and cholesterol diet. All rats were divided into 3 groups： control, AS and GbE. GbE （100 mg/kg） was administered to rats by ig. After 8 weeks, the expression of IL-1β, TNF-α, IL-10, and IL-10R in the heart of AS rats were detected by enzyme-linked immunosorbant assay, reverse transcriptase polymerasechain reaction and Western blotting. Results： The protein and mRNA expressions of IL-1β, TNF-α, IL-10 and IL-10R were markedly higher in AS group than those in control group （P〈0.01）. The protein and mRNA expressions of IL-1β and TNF-α were markedly lower in GbE group than those in AS group; while the protein and mRNA expressions of IL-10 and IL-10R were markedly higher in GbE group than those in AS group （P〈0.01）. Conclusion： GbE has significant inhibitory effects on proinflammatory cytokine IL-1β, TNF-α. The up-regulation of anti-inflammatory cytokine IL-10, IL-10R that may he partially responsible for its anti-AS effects.
基金supported by the National Natural Science Foundation of China(No.30772745)the Doctoral Foundation of Ministry of Education of China(No.20070698070)Science and Technology Project of Shaanxi Province(2006K16-G14)
文摘Objective To investigate the relationship between peritoneal macrophages(PMAs)and inflammatory reaction in a rat model of severe acute pancreatitis(SAP).Methods Sprague-Dawley rats were randomly divided into control group and SAP group.To induce SAP in rats,40 g/L sodium taurocholate(0.1 mL/100 g)was injected into the pancreatic duct through retrograde exposure of pancreatic bile duct in hepatic porta.One-third of rats were sacrificed at 3,6 or 12 h after modeling.PMAs were extracted,and incubated for 24 h in a humidified 5% carbon dioxide incubator.The expressions of tumor necrosis factor alpha(TNF-α)and interleukin-1β(IL-1β)mRNA in PMAs were measured by semi-quantitative RT-PCR.The levels of TNF-α and IL-1β in culture medium and serum were evaluated.The histological changes of pancreas were examined.Results The expressions of TNF-α mRNA and IL-1β mRNA in PMAs were significantly higher in SAP group than in control group at each time point(P<0.01).The concentrations of TNF-α and IL-1β in culture medium and serum were significantly elevated in SAP group compared with control group(P<0.01).The histological analysis of pancreas indicated that the damage was more severe in SAP group than in control group(P<0.01).Conclusion PMAs secrete cytokines into pancreatitis-associated ascitic fluid,and this study demonstrates a correlation between SAP and the activation of PMAs.
