Targeting the extracellular matrix for NF1-associated neurofibroma treatment

Neurofibromatosis type 1(NF1)is one of the most common genetic disorders that predisposes patients to benign and malignant tumors of the peripheral nervous system.Plexiform and cutaneous neurofibromas are NF1-associated benign tumors.Despite their benign nature,they can cause tremendous morbidity in patients with NF1.Therapeutic drug options are limited to the MEK inhibitor,selumetinib,which is the only approved drug for pediatric patients with plexiform neurofibromas.Antifibrotic strategies have substantial therapeutic potential for NF1-associated neurofibromas.This review discusses the fibrotic features of plexiform and cutaneous neurofi-bromas focusing on the pathological composition of the extracellular matrix.It also highlights the core pathways implicated in the biochemical and biophysical regulation of the extracellular matrix remodeling in tumor imitation and progression.Finally,this review provides a brief outlook on how exploring novel vulnerabilities residing in the aberrant extracellular matrix and their underlying pathways can benefit the treatment of NF1-associated neurofibromas.

TSP-1 promotes glomerular mesangial cell proliferation and extracellular matrix secretion in Thy-1 nephritis rats

The proliferation of glomerular mesangial cells （GMC） and secretion of the extracellular matrix （ECM） in rat with Thy-1 nephritis （Thy-lN） resembling human mesangioproliferative glomerulonephritis have been explored for many years; however, the molecular mechanisms of GMC proliferation and ECM production remain unclear. Our previous studies have demonstrated that the thrombospondin-1 （TSP-1） gene was involved in mediating rat GMC proliferation and ECM synthesis induced by sublytic C5b-9 in vitro. 111 the present study, the roles of the TSP-1 gene in GMC proliferation, ECM production, and urinary protein secretion in Thy-lN rats were determined by using TSP-1 small hairpin RNA, and the results revealed that silencing of the TSP-1 gene in rat renal tissues could diminish GMC proliferation （P 〈 0.01） and ECM secretion （P 〈 0.01） as well as urinary protein secretion （P 〈 0.05） in Thy-lN rats. Together, the current findings suggested that TSP-1 gene expression was required for GMC proliferation and ECM production in Thy-lN rats.

Nectin-like Molecule 1 Inhibits the Migration and Invasion of U251 Glioma Cells by Regulating the Expression of An Extracellular Matrix Protein Osteopontin

Objective To investigate the molecular mechanism of nectin-like molecule 1(NECL1) inhibiting the migration and invasion of U251 glioma cells.Methods We infected U251 glioma cells with adeno-nectin-like molecule 1(Ad-NECL1) or empty adenovirus(Ad).Transwell and wound healing assays were performed to observe the migration of U251 cells incubated with the cell supernatant from Ad-NECL1 or Ad infected U251 cells.DNA microarray was applied to screen the gene expression profile after the restoration of NECL1 in U251 glioma cell lines.The differential expression of osteopontin(OPN),a gene related to migration and invasion,was further analyzed with semi-quantitative reverse transcription-polymerase chain reaction(RT-PCR),Western blot,and immunohistochemistry.Results The restoration of NECL1 inhibited migration of U251 cells significantly(P<0.05).Altogether 195 genes were found differentially expressed by microarray,in which 175 were up-regulated and 20 down-regulated,including 9 extracellular matrix proteins involved in the migration of cells.Both mRNA and protein expressions of OPN,the most markedly reduced extracellular matrix protein,were found decreased in U251 cells after restoration of NECL1.Immunohistochemical assay also detected an increase of OPN in glioma tissues,related with the progressing of malignant grade.Conclusion A link might exist between NECL1 and the extracellular matrix protein OPN in inhibiting the migration and invasion of U251 glioma cells.

Effects of Heparin on Transforming Growth Factor-β_1 and Extracellular Matrix Components in the Glomeruli of Diabetic Rats

The effects of heparin on the expression of transforming growth factor-β 1 (TGF-β 1) and two extracellular matrix components laminin (LN) and fibronectin (FN) in diabetic rat glomeruli were investigated. Twenty-six rats were randomly divided into control group (C, n=8), diabetic group (D, n=9), and diabetes+heparin group (DH, n=9). After 8-week therapy of heparin (200 U once daily by abdominal injection), TGF-β 1, LN and FN expression in glomeruli was detected by immunohistochemical method. The results showed that the expression levels of TGF-β 1, LN and FN were higher in group D than in group C. It was found that heparin could reduce 24-h urinary albumin excretion and inhibit overexpression of TGF-β 1, LN and FN in glomeruli of diabetic rats. It suggested that the inhibitory effect of heparin on diabetic glomerular sclerosis was at least partly related with the inhibition of TGF-β 1 expression.

肝细胞癌患者血清ECM1、MMP-9和VEGF水平的变化及其意义

目的 探究肝细胞癌患者血清细胞外基质蛋白-1(ECM1)、基质金属蛋白酶-9(MMP-9和血管内皮生长因子(VEGF)水平的变化及其意义。方法 对60例肝细胞癌患者进行回顾性分析,患者主要使用甲磺酸阿帕替尼进行治疗,必要时也可联合GEMOX方案肝动脉化疗栓塞术进行治疗。采用酶联免疫吸附法测定患者治疗前后的血清ECM1、VEGF、MMP-9水平。比较患者治疗前后ECM1、MMP-9和VEGF水平;比较不同临床病理特征(年龄、性别、血管侵犯、淋巴结转移、TNM分期、Edmondson分期和肿瘤直径)患者ECM1、MMP-9和VEGF水平。结果 治疗后,患者ECM1、MMP-9以及VEGF水平分别为(135.23±44.58)pg/ml、(421.25±87.56)μg/L和(657.56±54.56)pg/ml,均低于治疗前的(215.56±30.80)pg/ml、(499.56±30.56)μg/L、(798.02±50.79)pg/ml(P<0.05)。不同年龄、性别患者ECM1、MMP-9、VEGF水平比较差异无统计学意义(P>0.05);不同血管侵犯、淋巴结转移、TNM分期、Edmondson分期和肿瘤直径患者ECM1、MMP-9、VEGF水平比较差异具有统计学意义(P<0.05)。结论 ECM1、MMP-9、VEGF三者相互作用可促进肝癌细胞的转移,可根据其水平情况,了解患者肝细胞、肝功能健康状况。

Interaction between insulin-like growth factor binding protein-related protein 1 and transforming growth factor beta 1 in primary hepatic stellate cells

BACKGROUND: We previously showed that insulin-like growth factor binding protein-related protein 1 (IGFBPrP1) is a novel mediator in liver fibrosis. Transforming growth factor beta 1 (TGF beta 1) is known as the strongest effector of liver fibrosis. Therefore, we aimed to investigate the detailed interaction between IGFBPrP1 and TGF beta 1 in primary hepatic stellate cells (HSCs). METHODS: We overexpressed TGF beta 1 or IGFBPrP1 and inhibited TGF beta 1 expression in primary HSCs for 6, 12, 24, 48, 72, and 96 hours to investigate their interaction and observe the accompanying expressions of a-smooth muscle actin (alpha-SMA), collagen I, fibronectin, and phosphorylated-mothers against decapentaplegic homolog 2/3 (p-Smad2/3). RESULTS: We found that the adenovirus vector encoding the TGF beta 1 gene (AdTGF beta 1) induced IGFBPrP1 expression while that of alpha-SMA, collagen I, fibronectin, and TGF beta 1 increased gradually. Concomitantly, AdIGFBPrP1 upregulated TGF beta 1, alpha-SMA, collagen I, fibronectin, and p-Smad2/3 in a time-dependent manner while IGFBPrP1 expression was decreased at 96 hours. Inhibition of TGF beta 1 expression reduced the IGFBPrP1-stimulated expression of alpha-SMA, collagen I, fibronectin, and p-Smad2/3. CONCLUSIONS: These findings for the first time suggest the existence of a possible mutually regulation between IGFBPrP1 and TGF beta 1, which likely accelerates liver fibrosis progression. Furthermore, IGFBPrP1 likely participates in liver fibrosis in a TGF beta 1-depedent manner, and may act as an upstream regulatory factor of TGF beta 1 in the Smad pathway.

Effects of transforming growth factor β2 and connective tissue growth factor on induction of epithelial mesenchymal transition and extracellular matrix synthesis in human lens epithelial cells

AIM:To Investigate the effects of transforming growth factorβ2(TGF-β2)and connective tissue growth factor(CTGF)on transdifferentiation of human lens epithelial cells(HLECs)cultured in vitro and synthesis of extracellular matrix(ECM).METHODS:HLECs were treated with TGF-β2(0,0.5,1.0,5,10μg/L)and CTGF(0,15,30,60,100μg/L)for different times(0,24,48,72h)in vitro and the expression ofα-smooth muscle actin(α-SMA),the main component of the extracellular matrix typeⅠcollagen(Col-1)and fibronectin(Fn)were measured by using real-time polymerase chain reaction(PCR)and western-blot.RESULTS:TGF-β2 and CTGF significantly increased expression ofα-SMA mRNA and protein(P【0.05,P【0.001),Fn mRNA and protein(P【0.001),Col-1 mRNA and protein(P【0.001).TGF-β2 could induce HLECs expression of CTGF mRNA and protein in dosedependent manner(P【0.05,P【0.001).TGF-β2 and CTGF could induce HLECs to expressα-SMA,Fn and Col-1 in time-dependent manner.Each time of TGF-β2and CTGF induced HELCs expression ofα-SMA,Fn,Col-1 mRNA and protein was significant increase compared with control(P【0.05,P【0.001).CONCLUSION:TGF-β2 and CTGF could induce HLECs epithelial mesenchymal transition and ECM synthesis.

Effects of extracellular matrix proteins on expansion, proliferation and insulin-producing-cell differentiation of ARIP cells

Regeneration of transplantable pancreatic islet cells has been considered to be a promising alternative therapy for type 1 diabetes. Re-search has suggested that adult pancreatic stem and progenitor cells can be derived into insulin-producing cells or cultivated islet-like clusters given appropriate stimulating condi- tions. In this study we explored the effect of selective extracellular matrix (ECM) proteins on the potential of insulin-producing cell differen-tiation using ARIP cells, an adult rat pancreatic ductal epithelial cell line, as a model in vitro. Quantitative single cell morphology analysis indicated that all the four ECM proteins we have used (type I collagen, laminin, fibronectin and vitronectin) increased the single cell area and diameter of ARIP cells. In addition, se-rum-free cell cultivation was dependent on cell density and particular components;and serum could be replaced when systematic optimisa-tion could be performed. Surface treated with laminin was shown to be able to enhance overall cell expansion in the presence of de-fined serum-free medium conditions. Collagen treated surfaces enhanced insulin production in the presence of GLP-1 although the insulin gene expression was however weak accord-ingly. Our results suggest that selective ECM proteins have effects on single cell morphol-ogy, adhesion and proliferation of ARIP cells. These ECM molecules however do not have a potent effect on the insulin-producing cell dif-ferentiation potential of ARIP cells even com-bining with GLP-1.

The cellular microenvironment modulates the role of PAI-1 and vitronectin in mediating cell-matrix interactions

Plasminogen activator inhibitor-1 (PAI-1), a member of the serine protease inhibitor (serpin) superfamily of proteins, circulates in a complex with vitronectin. Furthermore, these two proteins are co-localized in the extracellular matrix (ECM) in many different pathophysiological conditions. Though PAI-1 is a well-characterized inhibitor of serine proteases, recent emphasis has also focused on its protease-independent functions. Vitronectin, a multi-domain protein that binds a wide variety of ligands and proteins, exists in the circulation in a preferred monomeric state, while in the extracellular matrix it exists as a multimer resulting from an altered conformation. Though the mechanism for the conformational alterations and compartmentalization in tissues is unknown, there are a number of biomolecules including PAI-1 that appear to cause such changes. Experimental analysis has established that PAI-1 induces association of vitronectin to higher-order species in a concentration-dependent fashion [1]. This report extends our investigations into the mechanism of the interaction between vitronectin and PAI-1 to explore the physiological relevance of these higher-order complexes for cellular adhesion and migration. In this study, we evaluate the effects of the pericellular microenvironment on the functions of the multimeric complexes in a variety of relevant biological settings. Our findings underscore the importance of the variability of components within this microenvironment, including different receptors and ECM components, in governing the way in which the vitronectin/PAI-1 complex mediates cell-matrix interactions.

Biochemical composition of the glomerular extracellular matrix in patients with diabetic kidney disease

In the glomeruli,mesangial cells produce mesangial matrix while podocytes wrap glomerular capillaries with cellular extensions named foot processes and tether the glomerular basement membrane(GBM).The turnover of the mature GBM and the ability of adult podocytes to repair injured GBM are unclear.The actin cytoskeleton is a major cytoplasmic component of podocyte foot processes and links the cell to the GBM.Predominant components of the normal glomerular extracellular matrix(ECM)include glycosaminoglycans,proteoglycans,laminins,fibronectin-1,and several types of collagen.In patients with diabetes,multiorgan composition of extracellular tissues is anomalous,including the kidney,so that the constitution and arrangement of glomerular ECM is profoundly altered.In patients with diabetic kidney disease(DKD),the global quantity of glomerular ECM is increased.The level of sulfated proteoglycans is reduced while hyaluronic acid is augmented,compared to control subjects.The concentration of mesangial fibronectin-1 varies depending on the stage of DKD.Mesangial type III collagen is abundant in patients with DKD,unlike normal kidneys.The amount of type V and type VI collagens is higher in DKD and increases with the progression of the disease.The GBM contains lower amount of type IV collagen in DKD compared to normal tissue.Further,genetic variants in theα3 chain of type IV collagen may modulate susceptibility to DKD and end-stage kidney disease.Human cellular models of glomerular cells,analyses of human glomerular proteome,and improved microscopy procedures have been developed to investigate the molecular composition and organization of the human glomerular ECM.

Human ciliary muscle cell responses to kinins:Activation of ERK1/2 and pro-matrix metalloproteinases secretion

AIM To study activation of extracellular signal-regulated kinase-1/2(ERK1/2) and pro-matrix metalloproteinases(pro-MMPs) secretion from isolated primary human ciliary muscle(h-CM) cells in response to bradykinin(BK) and other agonists. METHODS Serum-starved h-CM cells were challenged with vehicle, BK agonists or antagonists. Cell lysates were evaluated for phosphorylated ERK1/2 using homogeneous timeresolved fluorescence technology based on a sandwich immunoassay. Rabbit polyclonal anti-pro-MMP antibodies were used to measure pro-MMPs using immunoblot analysis.RESULTS A 10 min incubation time using 5 × 104 h-CM cells/well was optimum condition for studying stimulation of ERK1/2 phosphorylation. BK(100 nmol/L) caused a 1.86 ± 0.26 fold(n = 3) increase in ERK1/2 phosphorylation above baseline. BK analogs, Met-Lys-BK and RMP-7(100 nmol/L), also stimulated ERK1/2 phosphorylation by 1.57 ± 0.04 and 1.55 ± 0.09 fold, respectively. However, DesArg9-Bradykinin, a B1 receptor-selective agonist(0.1-1 μmol/L), was essentially inactive. HOE-140 or WIN-64338(B2-antagonists) appreciably blocked phosphorylation of ERK1/2 induced by various BK agonists. Pre-treatmentof cells with a prostaglandin(PG) synthase inhibitor(bromfenac; 1 μmol/L) failed to alter kinin-induced ERK1/2 activation. BK and a non-peptide BK agonist(FR-190997)(10 nmol/L-1 μmol/L) also enhanced pro-MMPs secretion(pro-MMP-1 > pro-MMP-3 > pro-MMP-2; 1.45-1.75-fold over baseline) from h-CM cells. CONCLUSION These collective data suggest that B2 kinin receptors initiate signaling in h-CM cells by a relatively rapid mechanism(within minutes) involving ERK1/2 activation which in turn regulates MMPs production(within hours). The latter process does not involve PGs.

脓毒症患者血清NLRC3、ECM1表达与急性呼吸窘迫综合征的相关性研究

目的探讨脓毒症患者血清NOD样受体家族含CARD结构域蛋白3(NLRC3)、细胞外基质蛋白1(ECM1)表达与急性呼吸窘迫综合征(ARDS)的相关性。方法选取脓毒症患者133例纳入脓毒症组,并选取同时间段体检健康者80例纳入对照组。根据是否并发ARDS分为ARDS组(52例)和非ARDS组(81例),采用酶联免疫吸附法检测血清NLRC3、ECM1表达。通过多因素Logistic回归分析筛选脓毒症患者并发ARDS的因素。采用受试者工作特征(ROC)曲线分析血清NLRC3、ECM1表达对脓毒症患者并发ARDS的预测价值。结果与对照组比较,脓毒症组血清NLRC3表达降低,ECM1表达升高,差异有统计学意义(P<0.05)。133例脓毒症患者ARDS发生率为39.10%(52/133)。与非ARDS组比较,ARDS组血清NLRC3表达降低,ECM1表达升高,差异有统计学意义(P<0.05)。脓毒症患者并发ARDS的独立危险因素为序贯器官衰竭评估评分增加、血乳酸升高、ECM1升高,独立保护因素为NLRC3升高(P<0.05)。血清NLRC3、ECM1表达联合预测脓毒症患者并发ARDS的曲线下面积为0.887,大于血清NLRC3、ECM1表达单独预测的0.811、0.792(P<0.05)。结论脓毒症患者血清NLRC3表达降低和ECM1表达升高与并发ARDS密切相关。血清NLRC3、ECM1表达联用对脓毒症患者并发ARDS有较高的预测价值。

骨髓增殖性肿瘤患者血清金属蛋白酶抑制剂-1、基质金属蛋白酶-9、血管内皮生长因子与骨髓纤维化程度的相关性

目的探讨骨髓增殖性肿瘤(MPN)患者血清血管内皮生长因子(VEGF)、基质金属蛋白酶-9(MMP-9)及金属蛋白酶抑制剂-1(TIMP-1)与骨髓纤维化(MF)分级的关系。方法选择90例费城染色体阴性(Ph-)MPN初诊患者为MPN组。根据世界卫生组织(WHO)2016年骨髓纤维化分级标准将MPN患者分为纤维化前期或早期组54例和明显纤维化期组36例;另选取健康志愿者50例作为对照组。采用酶联免疫吸附实验检测血清VEGF、MMP-9、TIMP-1水平并计算TIMP-1与MMP-9比值(TIMP-1/MMP-9)。采用Spearman秩相关检验分析VEGF、MMP-9、TIMP-1、TIMP-1/MMP-9与MF分级的相关性。绘制受试者工作特征(ROC)曲线分析各指标单独或联合诊断MPN或区分MF分级的预测价值。结果与对照组相比,MPN组血清VEGF、MMP-9和TIMP-1均升高,差异有统计学意义(P<0,05)。VEGF、MMP-9、TIMP-1、TIMP-1/MMP-9诊断MPN的曲线下面积(AUC)分别为0.834、0.745、0.923、0.618;VEGF、MMP-9和TIMP-1联合诊断MPN的AUC为0.960;当最佳截断值为0.627时,敏感度为85.56%,特异度为92.00%。与纤维化前期或早期组相比,明显纤维化期组患者血清VEGF、TIMP-1、TIMP-1/MMP-9均升高,差异有统计学意义(P<0.05)。Spearman相关性分析结果显示,VEGF(r=0.378,P=0.001)、TIMP-1(r=0.512,P<0.001)、TIMP-1/MMP-9(r=0.353,P=0.001)与MPN患者MF分级呈正相关(P<0.05)。ROC曲线分析显示,VEGF、MMP-9、TIMP-1、TIMP-1/MMP-9区分纤维化前期或早期患者和明显纤维化期患者的AUC分别为0.723、0.523、0.802、0.708;VEGF、TIMP-1和TIMP-1/MMP-9联合区分纤维化前期或早期患者和明显纤维化期患者的AUC为0.838;当最佳截断值为0.530时,敏感度为72.22%,特异度为85.19%。结论血清VEGF、TIMP-1和TIMP-1/MMP-9均可反映MPN患者MF进展,各指标联合检测可预测MPN患者MF程度。

CD147、ESM-1、sdLDL-C与ACI患者颈动脉斑块类别及狭窄程度的关联性

目的 探究细胞外基质金属蛋白酶诱导因子(CD147)、内皮细胞特异性分子-1 (ESM-1)、小而密低密度脂蛋白胆固醇(sdLDL-C)与急性脑梗死(ACI)患者颈动脉斑块类别及狭窄程度的关联性。方法 选择淄博一四八医院2021年3月至2022年3月收治的80例ACI患者,测定患者颈动脉斑块类别及狭窄程度。比较不同颈动脉斑块类别及狭窄程度患者一般资料、血清CD147、ESM-1、sdLDL-C水平;分析血清CD147、ESM-1、sdLDL-C水平与患者颈动脉斑块类别及狭窄程度的关系;探讨患者颈动脉斑块类别及狭窄程度的影响因素。结果 80例ACI患者中存在不稳定斑块49例(61.25%),稳定斑块17例(21.25%),无斑块14例(17.50%);存在重度狭窄7例(8.75%),中度狭窄16例(20.00%),轻度狭窄30例(37.50%),无狭窄27例(33.75%)。不同颈动脉斑块类别及狭窄程度患者血清CD147、ESM-1、sdLDL-C水平比较,差异有统计学意义(P<0.001);Spearman相关性分析可知,血清CD147、ESM-1、sdLDL-C水平与患者颈动脉斑块类别及狭窄程度呈显著正相关,血清CD147、ESM-1、sdLDL-C水平越高患者颈动脉斑块越不稳定,狭窄程度越严重(P<0.001);Logistic回归分析显示,低密度脂蛋白胆固醇、血清CD147、ESM-1、sdLDL-C均为颈动脉斑块类别的影响因素(P<0.05),总胆固醇、低密度脂蛋白胆固醇、血清CD147、ESM-1、sdLDL-C均为颈动脉狭窄程度的影响因素(P<0.05)。结论 血清CD147、ESM-1、sdLDL-C水平与ACI患者颈动脉斑块类别及狭窄程度有关,可用于预测斑块类别及狭窄程度,指导临床治疗。

细胞外基质蛋白1在肿瘤中的表达及意义

目的:探讨细胞外基质蛋白1(extracellular matrix protein 1,ECM1)在肿瘤组织中的表达及意义。方法:应用免疫组织化学EnVision法,检测肝脏、乳腺、直肠组织(正常组织和肿瘤组织)中ECM1的表达,比较正常组织和肿瘤组织淋巴结转移肿瘤和淋巴结未转移肿瘤之间的ECM1表达差异。结果:ECM1的表达如下:正常肝组织阳性率20.0％(4／20),肝癌组织阳性率85.4％(70／82);正常乳腺组织阳性率9.1％(1／11),乳腺癌组织阳性率60.0％(18／30),其中淋巴结(一)者为37.5％(6／16),淋巴结(+)者为85.7％(12／14);正常直肠组织阳性率11.8％(2／17),直肠癌组织阳性率54.5％(18／33),其中淋巴结(一)者为33.3％(6／18),淋巴结(+)者为80.0％(12／15)。统计分析表明,对ECM1的表达,肿瘤组织高于正常组织,淋巴结转移性肿瘤高于非转移性(P<0.01)。结论:ECM1在肿瘤组织中过表达,并且与肿瘤的转移相关。

结直肠癌组织中ECM1基因水平的测定及临床意义

目的:探讨细胞外基质蛋白1基因在结直肠癌中的表达及其意义.方法:基于TaqMan-MGB荧光探针技术,建立实时荧光定量RT-PCR方法,检测正常结直肠黏膜组织(n=46),结直肠腺瘤(n=18),结直肠癌(淋巴结未转移)(n=25)和结直肠癌(淋巴结转移)(n=21)中ECM1基因的表达.结果:正常黏膜,腺瘤组织,结直肠癌(淋巴结未转移)组织和结直肠癌(淋巴结转移)组织中ECM1基因的表达均值分别为(9.81±3.16)×10~8拷贝/g RNA,(10.1±3.65)×10~8拷贝/g RNA,(6.89±2.96)×10~9拷贝/g RNA,(5.01±2.22)×10^(10)拷贝/g RNA.正常黏膜和腺瘤组织组间无明显差异(P>0.05);结直肠癌(淋巴结未转移)组明显高于正常黏膜和腺瘤组织组P<0.01);结直肠癌(淋巴结转移)组明显高于其他三组(P<0.01).结论:ECM1基因在结直肠癌中表达升高,并且与结直肠癌的转移相关.

细胞外基质蛋白1在乳腺癌组织和细胞株中的表达及其意义

目的:探讨细胞外基质蛋白1(extracellular matrix protein1,ECM1)在乳腺癌组织和细胞株中的表达及其意义。方法:应用免疫组织化学和免疫细胞化学EnVision法检测乳腺癌手术切除标本中乳腺组织(正常组织和癌组织)和恶性程度不同的乳腺癌细胞株(MCF-7、Sk-Br-3和MDA-435)中ECM1的表达,并比较正常乳腺组织和乳腺癌组织、淋巴结转移和未转移乳腺癌之间的ECM1表达差异。Western blotting检测确定ECM1亚型蛋白。结果:ECM1的表达在正常乳腺组织中阳性率为8.7%(2/23),在乳腺癌组织中阳性率为60.4%(29/48);其中乳腺癌淋巴结未转移者为38.5%(10/26),淋巴结转移者为86.4%(19/22)。统计分析表明,ECM1的表达在乳腺癌组织中高于正常组织(P<0.01),在转移性乳腺癌中高于非转移性乳腺癌(P<0.01)。恶性程度低的乳腺癌细胞株MCF-7、Sk-Br-3中不表达ECM1,而恶性程度较高的MDA-435细胞株中高表达ECM1。乳腺癌细胞中高表达的ECM1蛋白主要是相对分子质量为68000的ECM1a亚型。结论:ECM1(主要为ECM1a亚型)在乳腺癌组织和恶性程度高的乳腺癌细胞中过表达,并且与乳腺癌的淋巴结转移相关。

肝细胞癌患者血清ECM1、MMP-9和VEGF水平的变化及其意义

目的检测肝细胞癌患者血清ECM1水平,分析其与MMP-9和VEGF水平间的关系。方法应用酶联免疫吸附法测定40例肝癌患者血清ECM1、MMP-9和VEGF水平,分析其与肿瘤临床与病理特征间的关系。结果 40例肝癌患者血清ECM1、MMP-9和VEGF平均水平分别为150.01±5.85pg/ml、467±30.81μg/l和751.29±51.08pg/ml;三者水平均与肿瘤包膜、TNM分级、发生淋巴结转移和肿瘤分期有关(P<0.005),而ECM1和VEGF还与血管侵犯有关(P<0.005);ECM1与MMP-9和VEGF水平呈显著正相关(r=0.438,P=0.005r;=0.427,P=0.006)。结论 ECM1可能通过与MMP-9和VEGF相互作用而促进了肝癌血管生成和侵袭转移。

磷酸化的cAMP反应元件结合蛋白_1在糖尿病大鼠肾小球中表达增强

目的探讨磷酸化的cAMP反应元件结合蛋白1(P CREB1)在糖尿病大鼠肾组织中的表达特征及与细胞外基质积聚的关系。方法雄性Wistar大鼠切除右肾2周后随机分为对照组和糖尿病组,用链脲佐菌素复制糖尿病模型。分别于1、2、4、8和12周用免疫组化检测纤维黏连蛋白(FN)、层黏连蛋白(LN)及P CREB1的表达,Western印迹和RT PCR检测肾皮质CREB1磷酸化(活性)及mRNA的表达。结果糖尿病组FN与LN在4周时开始升高,并持续到12周。CREB1的活性及其mRNA在2、4和8周增高,在12周时降至正常。结论CREB1可能在糖尿病肾病细胞外基质积聚中发挥一定作用。

肝癌衍生生长因子和细胞外基质蛋白-1对原发性肝内胆管细胞癌的鉴别诊断和预后意义

目的:研究肝癌衍生生长因子(HDGF)和细胞外基质蛋白-1(ECM1)对原发性肝内胆管细胞癌(PICC)和结直肠癌(CRC)的鉴别诊断价值。方法:对55例PICC、60例肝脏转移性CRC以及60例原发性CRC标本行免疫组织化学(IHC)染色和统计学处理。结果:32例(58.2%)PICC归为肿块型,13例(23.6%)为导管内乳头状型,10例(18.2%)为周围导管浸润型。PICC中ECM1表达与男性(P=0.033)、肝门区(P=0.027)、导管内乳头黏液腺瘤(P=0.000)和肠型上皮细胞(P<0.001)显著相关。HDGF+/ECM1-免疫表型诊断PICC有100%的阳性预测值(PPV)。HDGF-/ECM1+免疫表型诊断转移性CRC有84.2%的PPV值。HDGF+/ECM1+免疫表型诊断PICC和转移性CRC分别有86.7%和13.3%的PPV值。单变量Cox生存分析55例PICC标本,确认浸润深度(P=0.005)、淋巴结转移(P=0.012)、肿瘤阶段(P=0.004)以及血管浸润(P=0.023)与病人不良预后显著相关。多变量Cox生存分析认为:肿瘤阶段(P=0.002)与病人生存期差有关。结论:PICC中的ECM1表达与性别、肿瘤位置、导管内乳头状生长型及肠表型呈统计学相关。HDGF和ECM1联合可作为鉴别PICC和转移性CRC的有用指标。