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
BACKGROUND: Triggering receptor expressed on myeloid cells-1(TREM-1) is a cell surface receptor expressed on neutrophils and monocytes. TREM-1 acts to amplify infl ammation and serves as a critical mediator of infl am...BACKGROUND: Triggering receptor expressed on myeloid cells-1(TREM-1) is a cell surface receptor expressed on neutrophils and monocytes. TREM-1 acts to amplify infl ammation and serves as a critical mediator of infl ammatory response in the context of sepsis. To date, the predisposition of TREM-1 gene polymorphisms to septic shock has not been reported. This study was designed to investigate whether TREM-1 genomic variations are associated with the development of septic shock.METHODS: We genotyped two TREM-1 single nucleotide polymorphisms(SNPs, rs2234237 and rs2234246) and evaluated the relationships between these SNPs and septic shock on susceptibility and prognosis.RESULTS: TREM-1 rs2234246 A allele in the promoter region was signifi cantly associated with the susceptibility of septic shock in recessive model(AA, OR=3.10, 95%CI 1.15 to 8.32, P=0.02), and in codominant model(AG, OR=0.72, 95%CI 0.43–1.19, P=0.02; AA, OR=2.71, 95%CI 1.00–7.42; P=0.03). However, in three inherited models(dominant model, recessive model, and codominant model), none of the assayed loci was signif icantly associated with the prognosis of septic shock. The nonsurvivor group demonstrated higher plasma IL-6 levels(99.7±34.7 pg/mL vs. 61.2±26.5 pg/mL, P<0.01) than the survivor group. Plasma concentrations of IL-6 among the three genotypes of rs2234246 were AA 99.4±48.9 pg/m L, AG 85.4±43 pg/m L, and GG 65.3±30.7 pg/m L(P<0.01). The plasma concentrations of IL-6 in patients with AA genotypes were signifi cantly higher than those in patients with GG genotypes(P<0.01).CONCLUSION: TREM-1 genetic polymorphisms rs2234246 may be significantly correlated only with susceptibility to septic shock in the Chinese Han population.展开更多
BACKGROUND： Myeloid cell （TREM-1） is an important mediator of the signal transduction pathway in inflammatory response. In this study, a mouse model of acute lung injury （ALl） by intraperitoneal injection of lipo...BACKGROUND： Myeloid cell （TREM-1） is an important mediator of the signal transduction pathway in inflammatory response. In this study, a mouse model of acute lung injury （ALl） by intraperitoneal injection of lipopolysaccharide （LPS） was established to observe the expression pattern of TREM-1 in lung tissue and the role of TREM-1 in pulmonary inflammatory response to ALl.METHODS： Thirty BALB/C mice were randomly divided into a normal control group （n=6） and an ALl group （n=24）. The model of ALl was made by intraperitonal injection of LPS in dose of 10 mg/ kg. Specimens from peripheral blood and lung tissue were collected 6, 12, 24 and 48 hours after LPS injection. RT-PCR was used to detect TREM-1 mRNA, and ELISA was employed for detection of TREM-1 protein and TNF-a protein, and HE staining was performed for the pathological Smith lung scoring under a light microscope.RESULTS： The expressions of TREM-1 mRNAin lung tissue and blood of the ALl group 6, 12, 24, and 48 hours after injection of LPS were higher than those in the control group. The levels of TREM- 1 protein and the levels of TNF-a protein in lung tissue of the ALl group 6, 12, 24, and 48 hours after LPS injection were higher than those of the control group; the level of TREM-1 protein peaked 12 hours after LPS injection, but it was not significantly correlated with the expression of TREM-1 mRNA （P=0.14）; the TNF-a concentration was positively correlated with TREM-1 levels in lung tissue and with Smith pathological score （r=0.795, P=0.001 ：r=0.499, P=0.034）, but not with the expression of TREM-1 mRNA （P=0.176）.CONCLUSION： The expression of TREM-1 mRNA in lung tissue of mice with ALl is elevated, and the expression of TREM-1 mRNA is related to the level of TNF-a and the severity of inflammatory response to ALl. The expressions of the TREM-1 gene are not consistent with the levels of TREM-1 protein, suggesting a new functional protein involved in immune regulation.展开更多
目的探讨血清高迁移率族蛋白B1(high mobility group protein B1,HMGB1)、可溶性髓系细胞触发受体1(soluble myeloid cell trigger receptor-1,sTREM-1)联合检测对脓毒症并发急性肾损伤(acute kidney injury,AKI)的诊断价值。方法回顾...目的探讨血清高迁移率族蛋白B1(high mobility group protein B1,HMGB1)、可溶性髓系细胞触发受体1(soluble myeloid cell trigger receptor-1,sTREM-1)联合检测对脓毒症并发急性肾损伤(acute kidney injury,AKI)的诊断价值。方法回顾性选择徐州市中心医院2020年1月1日至2022年1月31日收治的156例脓毒症患者,另选取同期68例体检健康者为对照组。对比两组受试者血清HMGB1、sTREM-1水平,多因素Logistic回归分析脓毒症并发AKI的影响因素,受试者工作特征曲线分析血清HMGB1、sTREM-1水平对脓毒症并发AKI的诊断价值。结果脓毒症组患者血清HMGB1[172530(133870,204010)ng/L比83720(63480,99870)ng/L]、sTREM-1[(49.56±8.03)ng/L比(24.96±5.24)ng/L]水平明显高于对照组(P<0.05);多因素Logistic分析显示,血肌酐(OR=1.079,95%CI:1.037~1.122)、HMGB1(OR=1.933,95%CI:1.376~2.714)、sTREM-1(OR=1.201,95%CI:1.101~1.309)为脓毒症并发AKI的独立危险因素(P<0.05);受试者工作特征曲线显示,HMGB1联合sTREM-1[曲线下面积(area under the curve,AUC)=0.928,95%CI:0.876~0.963]诊断脓毒症并发AKI的敏感度、特异度、准确度高于HMGB1(AUC=0.790,95%CI:0.718~0.851)、sTREM-1(AUC=0.778,95%CI:0.705~0.840)诊断。结论脓毒症患者血清HMGB1、sTREM-1水平明显增高,是脓毒症并发AKI的独立危险因素。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 Science&Technology Pillar Program of Guangdong Province(2009BAI86B03)
文摘BACKGROUND: Triggering receptor expressed on myeloid cells-1(TREM-1) is a cell surface receptor expressed on neutrophils and monocytes. TREM-1 acts to amplify infl ammation and serves as a critical mediator of infl ammatory response in the context of sepsis. To date, the predisposition of TREM-1 gene polymorphisms to septic shock has not been reported. This study was designed to investigate whether TREM-1 genomic variations are associated with the development of septic shock.METHODS: We genotyped two TREM-1 single nucleotide polymorphisms(SNPs, rs2234237 and rs2234246) and evaluated the relationships between these SNPs and septic shock on susceptibility and prognosis.RESULTS: TREM-1 rs2234246 A allele in the promoter region was signifi cantly associated with the susceptibility of septic shock in recessive model(AA, OR=3.10, 95%CI 1.15 to 8.32, P=0.02), and in codominant model(AG, OR=0.72, 95%CI 0.43–1.19, P=0.02; AA, OR=2.71, 95%CI 1.00–7.42; P=0.03). However, in three inherited models(dominant model, recessive model, and codominant model), none of the assayed loci was signif icantly associated with the prognosis of septic shock. The nonsurvivor group demonstrated higher plasma IL-6 levels(99.7±34.7 pg/mL vs. 61.2±26.5 pg/mL, P<0.01) than the survivor group. Plasma concentrations of IL-6 among the three genotypes of rs2234246 were AA 99.4±48.9 pg/m L, AG 85.4±43 pg/m L, and GG 65.3±30.7 pg/m L(P<0.01). The plasma concentrations of IL-6 in patients with AA genotypes were signifi cantly higher than those in patients with GG genotypes(P<0.01).CONCLUSION: TREM-1 genetic polymorphisms rs2234246 may be significantly correlated only with susceptibility to septic shock in the Chinese Han population.
文摘BACKGROUND： Myeloid cell （TREM-1） is an important mediator of the signal transduction pathway in inflammatory response. In this study, a mouse model of acute lung injury （ALl） by intraperitoneal injection of lipopolysaccharide （LPS） was established to observe the expression pattern of TREM-1 in lung tissue and the role of TREM-1 in pulmonary inflammatory response to ALl.METHODS： Thirty BALB/C mice were randomly divided into a normal control group （n=6） and an ALl group （n=24）. The model of ALl was made by intraperitonal injection of LPS in dose of 10 mg/ kg. Specimens from peripheral blood and lung tissue were collected 6, 12, 24 and 48 hours after LPS injection. RT-PCR was used to detect TREM-1 mRNA, and ELISA was employed for detection of TREM-1 protein and TNF-a protein, and HE staining was performed for the pathological Smith lung scoring under a light microscope.RESULTS： The expressions of TREM-1 mRNAin lung tissue and blood of the ALl group 6, 12, 24, and 48 hours after injection of LPS were higher than those in the control group. The levels of TREM- 1 protein and the levels of TNF-a protein in lung tissue of the ALl group 6, 12, 24, and 48 hours after LPS injection were higher than those of the control group; the level of TREM-1 protein peaked 12 hours after LPS injection, but it was not significantly correlated with the expression of TREM-1 mRNA （P=0.14）; the TNF-a concentration was positively correlated with TREM-1 levels in lung tissue and with Smith pathological score （r=0.795, P=0.001 ：r=0.499, P=0.034）, but not with the expression of TREM-1 mRNA （P=0.176）.CONCLUSION： The expression of TREM-1 mRNA in lung tissue of mice with ALl is elevated, and the expression of TREM-1 mRNA is related to the level of TNF-a and the severity of inflammatory response to ALl. The expressions of the TREM-1 gene are not consistent with the levels of TREM-1 protein, suggesting a new functional protein involved in immune regulation.
文摘目的探讨血清高迁移率族蛋白B1(high mobility group protein B1,HMGB1)、可溶性髓系细胞触发受体1(soluble myeloid cell trigger receptor-1,sTREM-1)联合检测对脓毒症并发急性肾损伤(acute kidney injury,AKI)的诊断价值。方法回顾性选择徐州市中心医院2020年1月1日至2022年1月31日收治的156例脓毒症患者,另选取同期68例体检健康者为对照组。对比两组受试者血清HMGB1、sTREM-1水平,多因素Logistic回归分析脓毒症并发AKI的影响因素,受试者工作特征曲线分析血清HMGB1、sTREM-1水平对脓毒症并发AKI的诊断价值。结果脓毒症组患者血清HMGB1[172530(133870,204010)ng/L比83720(63480,99870)ng/L]、sTREM-1[(49.56±8.03)ng/L比(24.96±5.24)ng/L]水平明显高于对照组(P<0.05);多因素Logistic分析显示,血肌酐(OR=1.079,95%CI:1.037~1.122)、HMGB1(OR=1.933,95%CI:1.376~2.714)、sTREM-1(OR=1.201,95%CI:1.101~1.309)为脓毒症并发AKI的独立危险因素(P<0.05);受试者工作特征曲线显示,HMGB1联合sTREM-1[曲线下面积(area under the curve,AUC)=0.928,95%CI:0.876~0.963]诊断脓毒症并发AKI的敏感度、特异度、准确度高于HMGB1(AUC=0.790,95%CI:0.718~0.851)、sTREM-1(AUC=0.778,95%CI:0.705~0.840)诊断。结论脓毒症患者血清HMGB1、sTREM-1水平明显增高,是脓毒症并发AKI的独立危险因素。
