BACKGROUND Massive hepatocyte death is the core event in acute liver failure(ALF).Gasdermin D(GSDMD)-mediated pyroptosis is a type of highly inflammatory cell death.However,the role of hepatocyte pyroptosis and its me...BACKGROUND Massive hepatocyte death is the core event in acute liver failure(ALF).Gasdermin D(GSDMD)-mediated pyroptosis is a type of highly inflammatory cell death.However,the role of hepatocyte pyroptosis and its mechanisms of expanding inflammatory responses in ALF are unclear.AIM To investigate the role and mechanisms of GSDMD-mediated hepatocyte pyroptosis through in vitro and in vivo experiments.METHODS The expression of pyroptosis pathway-associated proteins in liver tissues from ALF patients and a hepatocyte injury model was examined by Western blot.GSDMD short hairpin RNA(shRNA)was used to investigate the effects of downregulation of GSDMD on monocyte chemotactic protein 1(MCP1)and its receptor CC chemokine receptor-2(CCR2)in vitro.For in vivo experiments,we used GSDMD knockout mice to investigate the role and mechanism of GSDMD in a D-galactose/lipopolysaccharide(D-Galn/LPS)-induced ALF mouse model.RESULTS The levels of pyroptosis pathway-associated proteins in liver tissue from ALF patients and a hepatocyte injury model increased significantly.The level of GSDMD-N protein increased most obviously(P<0.001).In vitro,downregulation of GSDMD by shRNA decreased the cell inhibition rate and the levels of MCP1/CCR2 proteins(P<0.01).In vivo,GSDMD knockout dramatically eliminated inflammatory damage in the liver and improved the survival of DGaln/LPS-induced ALF mice(P<0.001).Unlike the mechanism of immune cell pyroptosis that involves releasing interleukin(IL)-1βand IL-18,GSDMDmediated hepatocyte pyroptosis recruited macrophages via MCP1/CCR2 to aggravate hepatocyte death.However,this pathological process was inhibited after knocking down GSDMD.CONCLUSION GSDMD-mediated hepatocyte pyroptosis plays an important role in the pathogenesis of ALF,recruiting macrophages to release inflammatory mediators by upregulating MCP1/CCR2 and leading to expansion of the inflammatory responses.GSDMD knockout can reduce hepatocyte death and inflammatory responses,thus alleviating ALF.展开更多
AIM: To investigate the association of the functional monocyte chemotactic protein-1 (MCP-1) promoter polymorphism (A-2518G) with spontaneous bacterial peritonitis (SBP).
AIM: To investigate plasma Monocyte Chemotactic Protein-1 levels preoperatively in colorectal cancer(CRC) and benign patients and postoperatively after CRC resection.METHODS: A plasma bank was screened for minimally i...AIM: To investigate plasma Monocyte Chemotactic Protein-1 levels preoperatively in colorectal cancer(CRC) and benign patients and postoperatively after CRC resection.METHODS: A plasma bank was screened for minimally invasive colorectal cancer resection(MICR) for CRC and benign disease(BEN) patients for whom preoperative, early postoperative, and 1 or more late postoperative samples(postoperative day 7-27) were available. Monocyte chemotactic protein-1(MCP-1) levels(pg/mL) were determined via enzyme linked immuno-absorbent assay. RESULTS: One hundred and two CRC and 86 BEN patients were studied. The CRC patient's median preoperative MCP-1 level(283.1, CI: 256.0, 294.3) was higher than the BEN group level(227.5, CI: 200.2, 245.2; P = 0.0004). Vs CRC preoperative levels, elevated MCP-1 plasma levels were found on postoperative day 1(446.3, CI: 418.0, 520.1), postoperative day 3(342.7, CI: 320.4, 377.4), postoperative day 7-13(326.5, CI: 299.4, 354.1), postoperative day 14-20(361.6, CI: 287.8, 407.9), and postoperative day 21-27(318.1, CI: 287.2, 371.6; P < 0.001 for all). CONCLUSION: Preoperative MCP-1 levels were higher in CRC patients(vs BEN). After MICR for CRC, MCP-1 levels were elevated for 1 mo and may promote angiogenesis, cancer recurrence and metastasis.展开更多
AIM:To investigate a genetic polymorphism of the monocyte chemotactic protein-1 (MCP-1 ) gene in patients with spontaneous bacterial peritonitis (SBP).METHODS:MCP-1 genotyping was performed in 23 patients with SBP and...AIM:To investigate a genetic polymorphism of the monocyte chemotactic protein-1 (MCP-1 ) gene in patients with spontaneous bacterial peritonitis (SBP).METHODS:MCP-1 genotyping was performed in 23 patients with SBP and 83 cirrhotic control patients with non-infected ascites.RESULTS:The frequency of carriers of the G-allele was lower in SBP patients but this difference did not reach statistical significance. However,in the subgroup of patients with alcoholic cirrhosis (n=80),carriers of the G-allele were significantly less frequent in SBP-patients (38.1%) than in cirrhotic controls (67.8%,P=0.021). CONCLUSION:In patients with alcoholic liver cirrhosis,the-2518 MCP-1 genotype AA is a risk factor for the development of SBP.展开更多
Objective: Chemotactic peptide may interfere with the process of tumor growth, invasion and metastasis by activating and attracting leukocytes containing macrophages. fMLP (CHO-Met-II e-Phe) is one of the chemotactic ...Objective: Chemotactic peptide may interfere with the process of tumor growth, invasion and metastasis by activating and attracting leukocytes containing macrophages. fMLP (CHO-Met-II e-Phe) is one of the chemotactic peptides. Boanmycin (BAM), a single A6 component from the bleomycin complex, is effective against a panel of cancers in clinical trials. This study was set to investigate the antitumor activity of BAM in combination with chemotactic peptide fMLP. Methods: Cytotoxicity of BAM and fMLP to cancer cells was determined by MTT assay. Therapeutic effect was evaluated by using the model of subcutaneously transplanted hepatoma 22 in mice. Results were judged as that a CDI less than 0.85 was considered as synergism and one less than 0.75 as significant synergism. Results: BAM and fMLP showed no synergism in cytotoxicity to cancer cells. In all in vivo experiments, fMLP was administered peritumorally at the dose of 1 mg/mouse; no significant inhibition by fMLP alone on the growth of hepatoma 22 was found. Different settings of BAM and fMLP combination included: (1) BAM, administered peritumorally×3, was started 24 h after tumor inoculation. BAM (0.5 mg/kg) alone and BAM-fMLP combination inhibited the growth of hepatoma 22 by 26.6% and 64.7%, respectively (P<0.05, CDI=0.36) on day 13. (2) BAM, administered ip×3, was started 24 h after tumor inoculation. The growth of tumor in BAM (1 mg/kg) group was faster than that in BAM-fMLP combination group. On day 14, BAM (1 mg/kg) alone and BAM-fMLP combination suppressed the growth of tumor by 11% and 70.6%, respectively (P<0.05), CDI=0.42). (3) BAM, administered ip×3, was started 96 h after tumor inoculation. The growth of tumor in BAM (1 mg/kg) group was faster than that in BAM-fMLP combination group. On day 13, BAM (1 mg/kg) alone and BAM-fMLP combination suppressed tumor growth by 38.2% and 77.1%, respectively (P<0.05, CDI=0.51). As shown in all in vivo experimental settings, antitumor effect of BAM in combination with fMLP was much more potent than that of BAM alone. Conclusion: This experiment shows that chemotactic peptide fMLP may enhance the antitumor effect of BAM, which indicates that chemotactic modulation may play a positive role in cancer chemotherapy.展开更多
In order to study the role of monocyte chemotactic protein-1 (MCP-1) in the intra-peri- toneal adhesion formation, 23 infertile patients undergoing laparoscopic operation were divided into two groups: experimental gr...In order to study the role of monocyte chemotactic protein-1 (MCP-1) in the intra-peri- toneal adhesion formation, 23 infertile patients undergoing laparoscopic operation were divided into two groups: experimental group including 12 patients with intra-peritoneal adhesion and control group including 11 patients without intra-peritoneal adhesion. Peritoneal fluid (PF) and peritoneum were collected from these patients during laparoscopic examination. The expression levels of MCP-1 protein and MCP-1 mRNA were detected by using enzyme-linked immunosorbent assay (ELISA) and dot blot analysis method respectively. It was found that the levels of MCP-l protein in PF of the patients with peritoneal adhesion were significantly higher than in the control group (0.44±0. 11 ng/ ml vs 0. 19±0.09 ng/ml respectively, P<0. 01). The level of MCP-l mRNA in the peritoneum of the patients with peritoneal adhesion was significantly higher than in the control group (48. 61±3. 72 vs 19.87±2.54 respectively, P<0. 01). It was suggested that MCP-1 might play a role in the adhe- sion formation, and chemotactic cytokines expressing in the peritoneal mesothelial cells might be take part in the process.展开更多
I read with great interest the article by Gbele et al published in issue 44 of World J Gastroenterol 2009.The results of their study indicate that-2518 Monocyte chemotactic protein-1(MCP-1)genotype AA is a risk fact...I read with great interest the article by Gbele et al published in issue 44 of World J Gastroenterol 2009.The results of their study indicate that-2518 Monocyte chemotactic protein-1(MCP-1)genotype AA is a risk factor for spontaneous bacterial peritonitis in patients with alcoholic cirrhosis.However,there are some items that need to be discussed.展开更多
Multiple sclerosis（MS）is a progressive inflammatory,and chronic demyelinating,neurodegenerative disease of central nervous system（CNS）.Autoimmune responses to myelin and other CNS antigens mediated by cluster of d...Multiple sclerosis（MS）is a progressive inflammatory,and chronic demyelinating,neurodegenerative disease of central nervous system（CNS）.Autoimmune responses to myelin and other CNS antigens mediated by cluster of differentiation 4（CD4＋）T cells are critical for initiation and progression of disease.Migration of autoimmune T cells from the peripheral lymph organs into CNS parenchyma leads to inflammation,demyelination and damage of axonal cytoskeleton, which manifest in decreased impulse conduction velocity of motor and sensory nerves. Myelin and axonal pathology causes motor, sensory and autonomic nerve dysfunction, including optic nerve damage leading to double or distorted vision; paresis and paralysis of extremities, painful sensations, and bladder sphincter dysfunction, manifested as bladder incontinence. Gray matter pa- thology in cortical and subcortical regions, including cerebellum and hippocampus underlies cognitive and behavioral dysfunction consisting of memory deficits, depression, and ataxic gait and tremor.展开更多
Objective：Gal bladder carcinoma was one of the malignant tumors in the digestive system, characterized by high recurrence and invasion. Recent research indicates that chemotactic factors such as IL-8, MCP-1 and MIP-1...Objective：Gal bladder carcinoma was one of the malignant tumors in the digestive system, characterized by high recurrence and invasion. Recent research indicates that chemotactic factors such as IL-8, MCP-1 and MIP-1αhave played an important role in such aspects as formulation, growth, shifting of the tumor. The aim of this study was to investigate expressions of IL-8, MCP-1 and MIP-1αin gal bladder adenocarcinoma tissues. Methods：Gal bladder adenocarcinoma and noncancerous tissues were routinely formalin-fixed and paraf in-embedded, and in situ hybridization assay for IL-8, MCP-1 and MIP-1αmRNA. Results：（1） The positive rates or the scorings of IL-8, MCP-1 and MIP-1αmRNA were significantly higher in human gal bladder adenocarcinoma than those in human chronic cholecystitis （P〈0.01）. The positive rates or the scorings of three factors were lower in wel-dif erentiatiated gal bladder adenocarcinoma than in poorly-dif erenfiatted ones, whereas there was only one significant dif erence between MCP-1 mRNA （P〈0.05）. The closely positive correlation were found among IL-8, MCP-1 and MIP-1αmRNA. （2） Both the positive rates of IL-8 mRNA and MCP-1 mRNA as wel as their scorings were tightly related to their invasion of the common bile duct and the occurrence of lymph node transfer, moreover, the positive rates of MIP-1αmRNA and its scorings were tightly related to its invasion of liver. （3） Close positive correlation exists not only in IL-8 mRNA and MCP-1 mRNA （r=0.528）, but also in MIP-1αmRNA and IL-8 mRNA （r=0.422）, so does in MCP-1 mRNA and MIP-1αmRNA （r=0.638）. Conclusion：The positive rates or the scorings of IL-8, MCP-1 and MIP-1αmRNA are significantly higher in human gal bladder adenocarcinoma than those in human chronic cholecystitis, and the closely positive correlation are found among them, which suggests that IL-8, MCP-1 and MIP-1αregulate and influence the development and transformation of the gal bladder adencarcinoma together.展开更多
Objective：To investigate the effect of MCP-1 on mesenchymal stem cells（MSCs） homing to injured myocardium in a rat myocardial infarction（MI） model. Methods：Rat myocardial infarction model was established by perm...Objective：To investigate the effect of MCP-1 on mesenchymal stem cells（MSCs） homing to injured myocardium in a rat myocardial infarction（MI） model. Methods：Rat myocardial infarction model was established by permanent left anterior descending branch ligation. Mesenchymal stem cells from donor rats were cultured in IMDM and labeled with BrdU. The Rats were divided into two groups. Monocyte chemotactic protein I（MCP-1） expression were measured by in situ hybridization and immunohistochemistry in the sham operated or infarcted hearts at 1, 2, 4, 7, 14 and 28 days post operation in MCP-1 detection group. The rats were injected with MCP-1, anti-MCP-1 antibody or saline 4 days after myocardial infarction in intervention group. Then, a total of 5 × 10^6 cells in 2.5 ml of PBS were injected through the tail vein. The number of the labeled MSCs in the infarcted hearts was counted 3 days post injection. Cardiac function and blood vessel density were assessed 28 days post injection. Results：Self-generating MCP-1 expression was increased at the first day, peaked at the 7^th day and decreased thereafter post MI and remained unchanged in sham operated hearts. The MSCs enrichment in the host hearts were more abundant in the MI groups than that in the non-MI group（P= 0.000）, the MSCs enrichment in the host hearts were more abundant in the MCP-1 injected group than that in the anti-MCP-1 antibody and saline injected groups （P = 0.000）. Cardiac function was improved more in MCP-1 injected group than anti-MCP-1 antibody and saline injected groups（P= 0.000）. Neovascularization in MCP-1 injected group significantly increased compared with that of other groups（P = 0.000）. Conclusion： Myocardial MCP-1 expression was increased only in the early phase post MI. MCP-1 may enhance MSCs homing to the injured heart and improve cardiac function by promoting neovascularization.展开更多
Objective: To explore the effect of Irbesartan and Metformin on tumor necrosis factor receptor 1 and monocyte chemoattractant protein-1 in patients with early diabetic nephropathy. Methods: A total of 162 patients wit...Objective: To explore the effect of Irbesartan and Metformin on tumor necrosis factor receptor 1 and monocyte chemoattractant protein-1 in patients with early diabetic nephropathy. Methods: A total of 162 patients with early diabetic nephropathy who had been admitted to the Hospital between February 2017 and February 2018 were randomly assigned into a Metformin group, an Irbesartan group, and a combination therapy group. The Metformin group were treated with oral Metformin, those in the Irbesartan group were given oral Irbesartan for treatment, and the combination therapy group was treated with Metformin combined with Irbesartan. After 3 months of continuous treatment, the levels of sTNFR1, high-sensitivity C-reactive protein, monocyte chemoattractant protein-1, glucose metabolism index, proteinuria, and serum creatinine levels in the two groups were compared. Results:After treatment, the levels of sTNFR1, sICAM-1, hs-CRP, and MCP-1 in the three groups decreased compared with those before treatment, and the levels in the combination therapy group were all shown to be lower than those of the Metformin group and the Irbesartan group, with statistically significant differences (P<0.05). The levels of glycosylated hemoglobin and fasting blood glucose in the three groups were significantly lower than before treatment, and those in the combination therapy group were lower than the Metformin group and Irbesartan group, where the difference was statistically significant (P<0.05). The 24-hour urinary protein quantification, urinary albumin excretion rate, and serum creatinine in the combination therapy group were lower than those in the Metformin group and in the Irbesartan group, where the differences were statistically significant (P<0.05). Conclusion: The effects of metformin combined with irbesartan on early diabetic nephropathy patients were significant, which can effectively reduce the levels of serum sTNFR1 and MCP-1, relieve inflammation and improve glucose metabolism and proteinuria level.展开更多
目的:分析不同临床分期慢性乙型肝炎病毒(hepatitis B virus,HBV)感染患者血清嗜酸性粒细胞趋化因子11(eosinophilic chemotactic protein 11,CCL11)水平及其临床意义。方法:慢性HBV感染初治患者110例,分为HBeAg阳性慢性HBV感染组20例、...目的:分析不同临床分期慢性乙型肝炎病毒(hepatitis B virus,HBV)感染患者血清嗜酸性粒细胞趋化因子11(eosinophilic chemotactic protein 11,CCL11)水平及其临床意义。方法:慢性HBV感染初治患者110例,分为HBeAg阳性慢性HBV感染组20例、HBeAg阳性慢性乙型肝炎(chronic hepatitis B,CHB)组23例、HBeAg阴性慢性HBV感染组27例、HBeAg阴性CHB组24例、乙型肝炎肝硬化组16例。采用酶联免疫吸附法检测各组患者血清CCL11水平,应用Pearson相关系数分析血清CCL11水平与慢性HBV感染患者HBV DNA载量及肝功能指标的相关性。结果:HBe Ag阳性慢性HBV感染组血清CCL11水平低于HBeAg阳性CHB组、HBeAg阴性CHB组及乙肝肝硬化组(均P<0.05);HBeAg阳性CHB组血清CCL11水平低于HBeAg阴性CHB组和乙肝肝硬化组(均P<0.05);HBeAg阴性慢性HBV感染组血清CCL11水平低于HBeAg阴性CHB组及乙肝肝硬化组(均P<0.05)。Pearson相关分析显示,慢性HBV感染患者血清CCL11水平与丙氨酸转氨酶(alanine aminotransferase,ALT)(r=0.205,P=0.042)、天冬氨酸转氨酶(aspartate aminotransferase,AST)呈正相关(r=0.294,P=0.003),与HBV DNA载量无相关性(r=0.141,P=0.170)。结论:随着慢性HBV感染患者临床分期的进展,血清CCL11水平呈现逐渐升高的趋势,血清CCL11水平与肝转氨酶存在相关性,提示CCL11在肝脏炎症及纤维化过程中可能发挥重要作用。展开更多
目的:探讨同型半胱氨酸(Hcy)促进单核细胞趋化蛋白-1(MCP-1)表达诱导巨噬细胞浸润加重急性缺血性卒中(AIS)的机制。方法:采用线栓法制备局灶性脑缺血再灌注小鼠模型。采用2,3,5-氯化三苯基四氮唑(TTC)染色法检测脑缺血严重程度,HE染色...目的:探讨同型半胱氨酸(Hcy)促进单核细胞趋化蛋白-1(MCP-1)表达诱导巨噬细胞浸润加重急性缺血性卒中(AIS)的机制。方法:采用线栓法制备局灶性脑缺血再灌注小鼠模型。采用2,3,5-氯化三苯基四氮唑(TTC)染色法检测脑缺血严重程度,HE染色法检测缺血脑组织神经细胞损伤状况和炎症细胞浸润程度;高效液相色谱法检测急性期小鼠脑组织Hcy表达;免疫组织化学染色、Western blot、real time RT-PCR法检测小鼠脑组织MCP-1表达。Transwell小室检测巨噬细胞迁移程度,TUNEL法检测Hcy对内皮细胞影响;利用MCP-1中和抗体观察对巨噬细胞迁移的影响。结果:与假手术组比较,模型组小鼠右侧大脑半球梗死明显,缺血脑组织损伤严重,神经细胞死亡并伴有大量炎症细胞浸润;Hcy水平显著升高,MCP-1蛋白和mRNA表达均明显增加。Hcy刺激小鼠脑血管内皮细胞后可诱导NF-κB(p65)入核,促进巨噬细胞迁移,促进内皮细胞凋亡,给予NF-κB(p65)抑制剂后MCP-1生成减少;MCP-1中和抗体明显抑制巨噬细胞迁移。结论:Hcy、MCP-1与脑缺血再灌注炎性反应相关,且Hcy可能通过NF-κB通路促进MCP-1表达,发挥诱导巨噬细胞浸润作用,加重脑缺血损伤。展开更多
目的研究孕妇血清叶酸(FA)、单核细胞趋化蛋白-1(MCP-1)和孕酮诱导的阻断因子(PIBF)水平与早期妊娠胚胎停止发育的相关性。方法选取2021年12月~2023年12月荆州市第二人民医院收治的早期妊娠胚胎停止发育孕妇98例为胎停组,另选同期进行...目的研究孕妇血清叶酸(FA)、单核细胞趋化蛋白-1(MCP-1)和孕酮诱导的阻断因子(PIBF)水平与早期妊娠胚胎停止发育的相关性。方法选取2021年12月~2023年12月荆州市第二人民医院收治的早期妊娠胚胎停止发育孕妇98例为胎停组,另选同期进行孕检的正常早期妊娠孕妇50例为对照组,收集一般临床资料,酶联免疫吸附试验(ELISA)检测血清FA,MCP-1和PIBF水平。多因素Logistic回归分析早期妊娠胚胎停止发育的影响因素;绘制受试者工作特征(ROC)曲线分析血清FA,MCP-1和PIBF对早期妊娠胚胎停止发育的预测价值;Pearson法分析血清FA,MCP-1,PIBF与孕酮(PROG)、雌二醇(E2)以及β-人绒毛膜促性腺激素(β-HCG)的相关性。结果与对照组相比,胎停组的血清FA(9.51±1.21nmol/L vs 11.32±1.56nmol/L),PIBF(295.46±30.22 ng/ml vs 342.14±36.97ng/ml)水平降低,血清MCP-1(1.02±0.15 mg/ml vs 0.82±0.11 mg/ml)水平升高,差异具有统计学意义(t=7.785,8.347,8.229,均P<0.001)。两组孕妇的胎停史(75.64%vs 25.36%),PROG(13.32±1.81 ng/ml vs 23.65±2.74 ng/ml),E2(221.34±25.69 pmol/L vs 298.65±31.64 pmol/L)以及β-HCG(5323.62±536.85 U/L vs 8562.31±924.55 U/L)水平比较,差异具有统计学意义(t/χ^(2)=6.548~27.428,均P<0.05)。孕妇胎停史、MCP-1水平升高为影响早期妊娠胎停的危险因素(Waldχ^(2)=4.239,4.613,均P<0.05),β-HCG,FA以及PIBF水平升高为影响早期妊娠胎停的保护因素(Waldχ^(2)=4.476,4.423,5.974,均P<0.05);FA,MCP-1,PIBF以及联合预测早期妊娠胚胎停止发育的AUC分别为0.811,0.805,0.816和0.908,联合预测显著优于FA,MCP-1,PIBF单独预测(Z=2.749,2.381,1.993,均P<0.05)。FA,PIBF与PROG,E2,β-HCG呈正相关(r=0.433~0.512,均P<0.05),MCP-1与PROG,E2,β-HCG呈负相关(r=-0.432,-0.487,-0.458,均P<0.05)。结论早期妊娠胚胎停止发育孕妇血清FA,PIBF水平降低,MCP-1水平升高,三者均为影响孕妇胚胎停止发育的影响因素,对早期妊娠胚胎停止发育具有一定辅助预测价值。展开更多
基金Supported by the National Natural Science Foundation of China,No.81570543 and No.81560104
文摘BACKGROUND Massive hepatocyte death is the core event in acute liver failure(ALF).Gasdermin D(GSDMD)-mediated pyroptosis is a type of highly inflammatory cell death.However,the role of hepatocyte pyroptosis and its mechanisms of expanding inflammatory responses in ALF are unclear.AIM To investigate the role and mechanisms of GSDMD-mediated hepatocyte pyroptosis through in vitro and in vivo experiments.METHODS The expression of pyroptosis pathway-associated proteins in liver tissues from ALF patients and a hepatocyte injury model was examined by Western blot.GSDMD short hairpin RNA(shRNA)was used to investigate the effects of downregulation of GSDMD on monocyte chemotactic protein 1(MCP1)and its receptor CC chemokine receptor-2(CCR2)in vitro.For in vivo experiments,we used GSDMD knockout mice to investigate the role and mechanism of GSDMD in a D-galactose/lipopolysaccharide(D-Galn/LPS)-induced ALF mouse model.RESULTS The levels of pyroptosis pathway-associated proteins in liver tissue from ALF patients and a hepatocyte injury model increased significantly.The level of GSDMD-N protein increased most obviously(P<0.001).In vitro,downregulation of GSDMD by shRNA decreased the cell inhibition rate and the levels of MCP1/CCR2 proteins(P<0.01).In vivo,GSDMD knockout dramatically eliminated inflammatory damage in the liver and improved the survival of DGaln/LPS-induced ALF mice(P<0.001).Unlike the mechanism of immune cell pyroptosis that involves releasing interleukin(IL)-1βand IL-18,GSDMDmediated hepatocyte pyroptosis recruited macrophages via MCP1/CCR2 to aggravate hepatocyte death.However,this pathological process was inhibited after knocking down GSDMD.CONCLUSION GSDMD-mediated hepatocyte pyroptosis plays an important role in the pathogenesis of ALF,recruiting macrophages to release inflammatory mediators by upregulating MCP1/CCR2 and leading to expansion of the inflammatory responses.GSDMD knockout can reduce hepatocyte death and inflammatory responses,thus alleviating ALF.
文摘AIM: To investigate the association of the functional monocyte chemotactic protein-1 (MCP-1) promoter polymorphism (A-2518G) with spontaneous bacterial peritonitis (SBP).
文摘AIM: To investigate plasma Monocyte Chemotactic Protein-1 levels preoperatively in colorectal cancer(CRC) and benign patients and postoperatively after CRC resection.METHODS: A plasma bank was screened for minimally invasive colorectal cancer resection(MICR) for CRC and benign disease(BEN) patients for whom preoperative, early postoperative, and 1 or more late postoperative samples(postoperative day 7-27) were available. Monocyte chemotactic protein-1(MCP-1) levels(pg/mL) were determined via enzyme linked immuno-absorbent assay. RESULTS: One hundred and two CRC and 86 BEN patients were studied. The CRC patient's median preoperative MCP-1 level(283.1, CI: 256.0, 294.3) was higher than the BEN group level(227.5, CI: 200.2, 245.2; P = 0.0004). Vs CRC preoperative levels, elevated MCP-1 plasma levels were found on postoperative day 1(446.3, CI: 418.0, 520.1), postoperative day 3(342.7, CI: 320.4, 377.4), postoperative day 7-13(326.5, CI: 299.4, 354.1), postoperative day 14-20(361.6, CI: 287.8, 407.9), and postoperative day 21-27(318.1, CI: 287.2, 371.6; P < 0.001 for all). CONCLUSION: Preoperative MCP-1 levels were higher in CRC patients(vs BEN). After MICR for CRC, MCP-1 levels were elevated for 1 mo and may promote angiogenesis, cancer recurrence and metastasis.
文摘AIM:To investigate a genetic polymorphism of the monocyte chemotactic protein-1 (MCP-1 ) gene in patients with spontaneous bacterial peritonitis (SBP).METHODS:MCP-1 genotyping was performed in 23 patients with SBP and 83 cirrhotic control patients with non-infected ascites.RESULTS:The frequency of carriers of the G-allele was lower in SBP patients but this difference did not reach statistical significance. However,in the subgroup of patients with alcoholic cirrhosis (n=80),carriers of the G-allele were significantly less frequent in SBP-patients (38.1%) than in cirrhotic controls (67.8%,P=0.021). CONCLUSION:In patients with alcoholic liver cirrhosis,the-2518 MCP-1 genotype AA is a risk factor for the development of SBP.
基金This work was supported by the "973" Major State Basic Research Project of china (No. G1998051104)
文摘Objective: Chemotactic peptide may interfere with the process of tumor growth, invasion and metastasis by activating and attracting leukocytes containing macrophages. fMLP (CHO-Met-II e-Phe) is one of the chemotactic peptides. Boanmycin (BAM), a single A6 component from the bleomycin complex, is effective against a panel of cancers in clinical trials. This study was set to investigate the antitumor activity of BAM in combination with chemotactic peptide fMLP. Methods: Cytotoxicity of BAM and fMLP to cancer cells was determined by MTT assay. Therapeutic effect was evaluated by using the model of subcutaneously transplanted hepatoma 22 in mice. Results were judged as that a CDI less than 0.85 was considered as synergism and one less than 0.75 as significant synergism. Results: BAM and fMLP showed no synergism in cytotoxicity to cancer cells. In all in vivo experiments, fMLP was administered peritumorally at the dose of 1 mg/mouse; no significant inhibition by fMLP alone on the growth of hepatoma 22 was found. Different settings of BAM and fMLP combination included: (1) BAM, administered peritumorally×3, was started 24 h after tumor inoculation. BAM (0.5 mg/kg) alone and BAM-fMLP combination inhibited the growth of hepatoma 22 by 26.6% and 64.7%, respectively (P<0.05, CDI=0.36) on day 13. (2) BAM, administered ip×3, was started 24 h after tumor inoculation. The growth of tumor in BAM (1 mg/kg) group was faster than that in BAM-fMLP combination group. On day 14, BAM (1 mg/kg) alone and BAM-fMLP combination suppressed the growth of tumor by 11% and 70.6%, respectively (P<0.05), CDI=0.42). (3) BAM, administered ip×3, was started 96 h after tumor inoculation. The growth of tumor in BAM (1 mg/kg) group was faster than that in BAM-fMLP combination group. On day 13, BAM (1 mg/kg) alone and BAM-fMLP combination suppressed tumor growth by 38.2% and 77.1%, respectively (P<0.05, CDI=0.51). As shown in all in vivo experimental settings, antitumor effect of BAM in combination with fMLP was much more potent than that of BAM alone. Conclusion: This experiment shows that chemotactic peptide fMLP may enhance the antitumor effect of BAM, which indicates that chemotactic modulation may play a positive role in cancer chemotherapy.
文摘In order to study the role of monocyte chemotactic protein-1 (MCP-1) in the intra-peri- toneal adhesion formation, 23 infertile patients undergoing laparoscopic operation were divided into two groups: experimental group including 12 patients with intra-peritoneal adhesion and control group including 11 patients without intra-peritoneal adhesion. Peritoneal fluid (PF) and peritoneum were collected from these patients during laparoscopic examination. The expression levels of MCP-1 protein and MCP-1 mRNA were detected by using enzyme-linked immunosorbent assay (ELISA) and dot blot analysis method respectively. It was found that the levels of MCP-l protein in PF of the patients with peritoneal adhesion were significantly higher than in the control group (0.44±0. 11 ng/ ml vs 0. 19±0.09 ng/ml respectively, P<0. 01). The level of MCP-l mRNA in the peritoneum of the patients with peritoneal adhesion was significantly higher than in the control group (48. 61±3. 72 vs 19.87±2.54 respectively, P<0. 01). It was suggested that MCP-1 might play a role in the adhe- sion formation, and chemotactic cytokines expressing in the peritoneal mesothelial cells might be take part in the process.
文摘I read with great interest the article by Gbele et al published in issue 44 of World J Gastroenterol 2009.The results of their study indicate that-2518 Monocyte chemotactic protein-1(MCP-1)genotype AA is a risk factor for spontaneous bacterial peritonitis in patients with alcoholic cirrhosis.However,there are some items that need to be discussed.
文摘Multiple sclerosis（MS）is a progressive inflammatory,and chronic demyelinating,neurodegenerative disease of central nervous system（CNS）.Autoimmune responses to myelin and other CNS antigens mediated by cluster of differentiation 4（CD4＋）T cells are critical for initiation and progression of disease.Migration of autoimmune T cells from the peripheral lymph organs into CNS parenchyma leads to inflammation,demyelination and damage of axonal cytoskeleton, which manifest in decreased impulse conduction velocity of motor and sensory nerves. Myelin and axonal pathology causes motor, sensory and autonomic nerve dysfunction, including optic nerve damage leading to double or distorted vision; paresis and paralysis of extremities, painful sensations, and bladder sphincter dysfunction, manifested as bladder incontinence. Gray matter pa- thology in cortical and subcortical regions, including cerebellum and hippocampus underlies cognitive and behavioral dysfunction consisting of memory deficits, depression, and ataxic gait and tremor.
文摘Objective：Gal bladder carcinoma was one of the malignant tumors in the digestive system, characterized by high recurrence and invasion. Recent research indicates that chemotactic factors such as IL-8, MCP-1 and MIP-1αhave played an important role in such aspects as formulation, growth, shifting of the tumor. The aim of this study was to investigate expressions of IL-8, MCP-1 and MIP-1αin gal bladder adenocarcinoma tissues. Methods：Gal bladder adenocarcinoma and noncancerous tissues were routinely formalin-fixed and paraf in-embedded, and in situ hybridization assay for IL-8, MCP-1 and MIP-1αmRNA. Results：（1） The positive rates or the scorings of IL-8, MCP-1 and MIP-1αmRNA were significantly higher in human gal bladder adenocarcinoma than those in human chronic cholecystitis （P〈0.01）. The positive rates or the scorings of three factors were lower in wel-dif erentiatiated gal bladder adenocarcinoma than in poorly-dif erenfiatted ones, whereas there was only one significant dif erence between MCP-1 mRNA （P〈0.05）. The closely positive correlation were found among IL-8, MCP-1 and MIP-1αmRNA. （2） Both the positive rates of IL-8 mRNA and MCP-1 mRNA as wel as their scorings were tightly related to their invasion of the common bile duct and the occurrence of lymph node transfer, moreover, the positive rates of MIP-1αmRNA and its scorings were tightly related to its invasion of liver. （3） Close positive correlation exists not only in IL-8 mRNA and MCP-1 mRNA （r=0.528）, but also in MIP-1αmRNA and IL-8 mRNA （r=0.422）, so does in MCP-1 mRNA and MIP-1αmRNA （r=0.638）. Conclusion：The positive rates or the scorings of IL-8, MCP-1 and MIP-1αmRNA are significantly higher in human gal bladder adenocarcinoma than those in human chronic cholecystitis, and the closely positive correlation are found among them, which suggests that IL-8, MCP-1 and MIP-1αregulate and influence the development and transformation of the gal bladder adencarcinoma together.
文摘Objective：To investigate the effect of MCP-1 on mesenchymal stem cells（MSCs） homing to injured myocardium in a rat myocardial infarction（MI） model. Methods：Rat myocardial infarction model was established by permanent left anterior descending branch ligation. Mesenchymal stem cells from donor rats were cultured in IMDM and labeled with BrdU. The Rats were divided into two groups. Monocyte chemotactic protein I（MCP-1） expression were measured by in situ hybridization and immunohistochemistry in the sham operated or infarcted hearts at 1, 2, 4, 7, 14 and 28 days post operation in MCP-1 detection group. The rats were injected with MCP-1, anti-MCP-1 antibody or saline 4 days after myocardial infarction in intervention group. Then, a total of 5 × 10^6 cells in 2.5 ml of PBS were injected through the tail vein. The number of the labeled MSCs in the infarcted hearts was counted 3 days post injection. Cardiac function and blood vessel density were assessed 28 days post injection. Results：Self-generating MCP-1 expression was increased at the first day, peaked at the 7^th day and decreased thereafter post MI and remained unchanged in sham operated hearts. The MSCs enrichment in the host hearts were more abundant in the MI groups than that in the non-MI group（P= 0.000）, the MSCs enrichment in the host hearts were more abundant in the MCP-1 injected group than that in the anti-MCP-1 antibody and saline injected groups （P = 0.000）. Cardiac function was improved more in MCP-1 injected group than anti-MCP-1 antibody and saline injected groups（P= 0.000）. Neovascularization in MCP-1 injected group significantly increased compared with that of other groups（P = 0.000）. Conclusion： Myocardial MCP-1 expression was increased only in the early phase post MI. MCP-1 may enhance MSCs homing to the injured heart and improve cardiac function by promoting neovascularization.
文摘Objective: To explore the effect of Irbesartan and Metformin on tumor necrosis factor receptor 1 and monocyte chemoattractant protein-1 in patients with early diabetic nephropathy. Methods: A total of 162 patients with early diabetic nephropathy who had been admitted to the Hospital between February 2017 and February 2018 were randomly assigned into a Metformin group, an Irbesartan group, and a combination therapy group. The Metformin group were treated with oral Metformin, those in the Irbesartan group were given oral Irbesartan for treatment, and the combination therapy group was treated with Metformin combined with Irbesartan. After 3 months of continuous treatment, the levels of sTNFR1, high-sensitivity C-reactive protein, monocyte chemoattractant protein-1, glucose metabolism index, proteinuria, and serum creatinine levels in the two groups were compared. Results:After treatment, the levels of sTNFR1, sICAM-1, hs-CRP, and MCP-1 in the three groups decreased compared with those before treatment, and the levels in the combination therapy group were all shown to be lower than those of the Metformin group and the Irbesartan group, with statistically significant differences (P<0.05). The levels of glycosylated hemoglobin and fasting blood glucose in the three groups were significantly lower than before treatment, and those in the combination therapy group were lower than the Metformin group and Irbesartan group, where the difference was statistically significant (P<0.05). The 24-hour urinary protein quantification, urinary albumin excretion rate, and serum creatinine in the combination therapy group were lower than those in the Metformin group and in the Irbesartan group, where the differences were statistically significant (P<0.05). Conclusion: The effects of metformin combined with irbesartan on early diabetic nephropathy patients were significant, which can effectively reduce the levels of serum sTNFR1 and MCP-1, relieve inflammation and improve glucose metabolism and proteinuria level.
文摘目的:探讨同型半胱氨酸(Hcy)促进单核细胞趋化蛋白-1(MCP-1)表达诱导巨噬细胞浸润加重急性缺血性卒中(AIS)的机制。方法:采用线栓法制备局灶性脑缺血再灌注小鼠模型。采用2,3,5-氯化三苯基四氮唑(TTC)染色法检测脑缺血严重程度,HE染色法检测缺血脑组织神经细胞损伤状况和炎症细胞浸润程度;高效液相色谱法检测急性期小鼠脑组织Hcy表达;免疫组织化学染色、Western blot、real time RT-PCR法检测小鼠脑组织MCP-1表达。Transwell小室检测巨噬细胞迁移程度,TUNEL法检测Hcy对内皮细胞影响;利用MCP-1中和抗体观察对巨噬细胞迁移的影响。结果:与假手术组比较,模型组小鼠右侧大脑半球梗死明显,缺血脑组织损伤严重,神经细胞死亡并伴有大量炎症细胞浸润;Hcy水平显著升高,MCP-1蛋白和mRNA表达均明显增加。Hcy刺激小鼠脑血管内皮细胞后可诱导NF-κB(p65)入核,促进巨噬细胞迁移,促进内皮细胞凋亡,给予NF-κB(p65)抑制剂后MCP-1生成减少;MCP-1中和抗体明显抑制巨噬细胞迁移。结论:Hcy、MCP-1与脑缺血再灌注炎性反应相关,且Hcy可能通过NF-κB通路促进MCP-1表达,发挥诱导巨噬细胞浸润作用,加重脑缺血损伤。
文摘目的研究孕妇血清叶酸(FA)、单核细胞趋化蛋白-1(MCP-1)和孕酮诱导的阻断因子(PIBF)水平与早期妊娠胚胎停止发育的相关性。方法选取2021年12月~2023年12月荆州市第二人民医院收治的早期妊娠胚胎停止发育孕妇98例为胎停组,另选同期进行孕检的正常早期妊娠孕妇50例为对照组,收集一般临床资料,酶联免疫吸附试验(ELISA)检测血清FA,MCP-1和PIBF水平。多因素Logistic回归分析早期妊娠胚胎停止发育的影响因素;绘制受试者工作特征(ROC)曲线分析血清FA,MCP-1和PIBF对早期妊娠胚胎停止发育的预测价值;Pearson法分析血清FA,MCP-1,PIBF与孕酮(PROG)、雌二醇(E2)以及β-人绒毛膜促性腺激素(β-HCG)的相关性。结果与对照组相比,胎停组的血清FA(9.51±1.21nmol/L vs 11.32±1.56nmol/L),PIBF(295.46±30.22 ng/ml vs 342.14±36.97ng/ml)水平降低,血清MCP-1(1.02±0.15 mg/ml vs 0.82±0.11 mg/ml)水平升高,差异具有统计学意义(t=7.785,8.347,8.229,均P<0.001)。两组孕妇的胎停史(75.64%vs 25.36%),PROG(13.32±1.81 ng/ml vs 23.65±2.74 ng/ml),E2(221.34±25.69 pmol/L vs 298.65±31.64 pmol/L)以及β-HCG(5323.62±536.85 U/L vs 8562.31±924.55 U/L)水平比较,差异具有统计学意义(t/χ^(2)=6.548~27.428,均P<0.05)。孕妇胎停史、MCP-1水平升高为影响早期妊娠胎停的危险因素(Waldχ^(2)=4.239,4.613,均P<0.05),β-HCG,FA以及PIBF水平升高为影响早期妊娠胎停的保护因素(Waldχ^(2)=4.476,4.423,5.974,均P<0.05);FA,MCP-1,PIBF以及联合预测早期妊娠胚胎停止发育的AUC分别为0.811,0.805,0.816和0.908,联合预测显著优于FA,MCP-1,PIBF单独预测(Z=2.749,2.381,1.993,均P<0.05)。FA,PIBF与PROG,E2,β-HCG呈正相关(r=0.433~0.512,均P<0.05),MCP-1与PROG,E2,β-HCG呈负相关(r=-0.432,-0.487,-0.458,均P<0.05)。结论早期妊娠胚胎停止发育孕妇血清FA,PIBF水平降低,MCP-1水平升高,三者均为影响孕妇胚胎停止发育的影响因素,对早期妊娠胚胎停止发育具有一定辅助预测价值。
