基质细胞衍生因子-1/趋化因子受体CXCR4轴与支气管哮喘

基质细胞衍生因子-1（stromal cell—derived factor-1,SDF-1）是趋化因子亚家族的成员之一,SDF1与趋化因子受体CXCR4（CXCR4）作用,构成SDF-1／CXCR4反应轴,在介导造血干细胞迁移及归巢、恶性肿瘤浸润转移、HIV感染、胚胎发育、免疫与炎症反应等方面发挥着重要作用。SDF1／CXCR4通过调节炎症细胞、血管形成、气道高反应性（AHR）等方面参与支气管哮喘（哮喘）的发生发展。     

基质细胞衍生因子-1/趋化因子受体4在干细胞治疗心肌梗死中的研究进展

目前临床上治疗心肌梗死的主要方法有直接经皮冠状动脉介入(primary percutaneous coronary intervention,PPCI)治疗、冠状动脉旁路移植术(coronary artery bypass grafting,CABG)等,这些治疗方法通常是从血运重建入手,很少关注如何挽救或修复发生缺血性损伤的心脏。近年来,基于干细胞的治疗逐渐成为治疗心肌梗死的探索方向,具有广阔的前景。最近研究表明,SDF-1/CXCR4在心肌梗死后的干细胞归巢、趋化、迁移,扩大旁分泌,促进血管生成和心室重构中起着重要作用,因此,其与心肌梗死的发病、进展及预后密切相关。本文将从基质细胞衍生因子-1/趋化因子受体4在干细胞治疗心肌梗死中的研究进展作一综述。     

基质细胞衍生因子-1及其受体CXCR4在骨髓干细胞治疗脑梗死中的作用

脑组织损伤后修复是一个复杂的过程.随着干细胞领域基础研究的迅速发展,外源性骨髓干细胞移植和内源性骨髓干细胞动员的临床应用逐渐成为治疗缺血性脑血管疾病有效方法 之一.基质细胞衍生因子-1(stromal cell-derived factor-1,SDF-1)及其特异性受体CXCR4 (CXC chemokine receptor 4)结合后形成的SDF-1/CXCR4轴,在脑梗死时骨髓干细胞的迁移、募集过程中起着关键作用.通过调控SDF-1/CXCR4轴,增加干细胞的治疗效果,将成为治疗缺血性脑血管病一个新的干预靶点.本文就脑梗死的干细胞治疗,以及SDF-1/CXCR4轴在骨髓干细胞的迁移、募集和脑梗死修复过程中的作用作一综述.     

基质细胞衍生因子-1/CXCR4轴与肝脏疾病

基质细胞衍生因子-1(SDF-1)/CXCR4轴及其介导的细胞信号转导通路在肝脏疾病中的作用是国内外研究的热点.研究发现SDF-1/ CXCR4信号转导途径与肝脏再生、炎症、肝硬化以及肿瘤等疾病有关,但其具体机制尚未完全清楚.在细胞微环境中,SDF-1/CXCR4相互作用促进肝癌细胞生长,增强肿瘤的迁移、浸润以及转移能力.本文就SDF-1/CXCR4通路在肝再生、炎症、肿瘤疾病中的病理特征和致病机制的研究进展作一综述.     

基质细胞衍生因子-1及其受体4与动脉粥样硬化的研究进展

动脉粥样硬化是一种由遗传及环境等多种综合因素所致的疾病,最近研究发现,基质细胞衍生因子-1（stromal cell-derived factor-1,SDF-1）与其受体4（CXCR chemokine receptor 4,CXCR4）结合,通过活化和介导炎症细胞进入动脉粥样斑块内, 促进动脉粥样硬化和斑块不稳定.因而,以SDF-1/CXCR4 轴为靶点治疗动脉粥样硬化相关疾病日益受到人们的重视.现就SDF-1/CXCR4生物轴与动脉粥样硬化方面的研究综述如下.     

基质细胞衍生因子/趋化因子受体4轴参与胰腺癌细胞侵袭的体外实验研究

目的 探讨胰腺癌细胞株趋化因子受体(CXCR)4的表达及其与增殖、侵袭和粘附的关系.方法 采用RT-PCR检测3个胰腺癌细胞株中CXCR4 mRNA的表达;Western印迹法检测胰腺癌细胞株中CXCR4的蛋白表达;共聚焦显微镜检测基质细胞衍生因子(SDF)-1α作用下AsPC-1细胞内钙荧光强度变化;MTT法检测细胞增殖;细胞体外粘附试验及Transwell体外侵袭实验观察胰腺癌细胞的粘附及侵袭能力.结果 3个胰腺癌细胞株均不同程度地存在CXCR4 mRNA及蛋白表达,AsPC-1细胞表达最强,而SW1990表达最弱;CXCR4功能性表达于AsPC-1细胞;SDF-1α不同程度的促进3种胰腺癌细胞的增殖、侵袭及粘附,尤以AsPC-1细胞最为明显,而SW1990细胞最弱;AMD3100可抑制SDF-1α所致的促增殖、侵袭及粘附作用.结论 胰腺癌细胞表达CXCR4mRNA及蛋白,SDF-1α通过与CXCR4作用影响胰腺癌细胞的侵袭转移,该效应与CXCR4表达程度密切相关.     

基质细胞衍生因子/趋化因子受体4轴参与胰腺癌细胞侵袭的体外实验研究

Objective To investigate the expression of chemokine receptor (CXCR)4 in human pancreatic cancer cell lines,and its association with proliferation,adhesion and invasion of pancreatic cancer cells.Methods The CXCR4 mRNA and protein in three pancreatic cancer cell lines were detected by RT-PCR and Western blotting,respectively.Confocal microscopy was used to detect the fluorescence intensity induced by SDF-lα in AsPC-1 cells.MTT test was performed to study the proliferation of pancreatic cancer cells.The invasive ability of pancreatic cell lines was determined by transwell invasion assay kit and the adhesive ability was detected by cell adhesive test in vitro.Results There were expressions of CXCR4 mRNA and protein in different extent in three pancreatic cancer cell lines.The strong expression was seen in AsPC-1 cell line,but weak expression in SW1990 cell line.The CXCR4 was functional expressed on AsPC-1 ceils.SDF-1α improved the proliferation,adhesion and invasion of three pancreatic cancer cell lines,especially in AsPC-1 cell line,while the proliferation in SW1990 cell line was weak.But all above effects of the SDF-1α could be inhibited by AMD3100.Conclasions CXCR4 mRNA and protein were expressed in pancreatic cancer cell lines.The efficacy that SDF-1 can increase the invasive ability of pancreatic cancer ceils through SDF-1/CXCR4 axis is closely related to the expression of CXCR4.     

基质细胞衍生因子/趋化因子受体4轴参与胰腺癌细胞侵袭的体外实验研究

Objective To investigate the expression of chemokine receptor (CXCR)4 in human pancreatic cancer cell lines,and its association with proliferation,adhesion and invasion of pancreatic cancer cells.Methods The CXCR4 mRNA and protein in three pancreatic cancer cell lines were detected by RT-PCR and Western blotting,respectively.Confocal microscopy was used to detect the fluorescence intensity induced by SDF-lα in AsPC-1 cells.MTT test was performed to study the proliferation of pancreatic cancer cells.The invasive ability of pancreatic cell lines was determined by transwell invasion assay kit and the adhesive ability was detected by cell adhesive test in vitro.Results There were expressions of CXCR4 mRNA and protein in different extent in three pancreatic cancer cell lines.The strong expression was seen in AsPC-1 cell line,but weak expression in SW1990 cell line.The CXCR4 was functional expressed on AsPC-1 ceils.SDF-1α improved the proliferation,adhesion and invasion of three pancreatic cancer cell lines,especially in AsPC-1 cell line,while the proliferation in SW1990 cell line was weak.But all above effects of the SDF-1α could be inhibited by AMD3100.Conclasions CXCR4 mRNA and protein were expressed in pancreatic cancer cell lines.The efficacy that SDF-1 can increase the invasive ability of pancreatic cancer ceils through SDF-1/CXCR4 axis is closely related to the expression of CXCR4.     

基质细胞衍生因子/趋化因子受体4轴参与胰腺癌细胞侵袭的体外实验研究

Objective To investigate the expression of chemokine receptor (CXCR)4 in human pancreatic cancer cell lines,and its association with proliferation,adhesion and invasion of pancreatic cancer cells.Methods The CXCR4 mRNA and protein in three pancreatic cancer cell lines were detected by RT-PCR and Western blotting,respectively.Confocal microscopy was used to detect the fluorescence intensity induced by SDF-lα in AsPC-1 cells.MTT test was performed to study the proliferation of pancreatic cancer cells.The invasive ability of pancreatic cell lines was determined by transwell invasion assay kit and the adhesive ability was detected by cell adhesive test in vitro.Results There were expressions of CXCR4 mRNA and protein in different extent in three pancreatic cancer cell lines.The strong expression was seen in AsPC-1 cell line,but weak expression in SW1990 cell line.The CXCR4 was functional expressed on AsPC-1 ceils.SDF-1α improved the proliferation,adhesion and invasion of three pancreatic cancer cell lines,especially in AsPC-1 cell line,while the proliferation in SW1990 cell line was weak.But all above effects of the SDF-1α could be inhibited by AMD3100.Conclasions CXCR4 mRNA and protein were expressed in pancreatic cancer cell lines.The efficacy that SDF-1 can increase the invasive ability of pancreatic cancer ceils through SDF-1/CXCR4 axis is closely related to the expression of CXCR4.     

基质细胞衍生因子/趋化因子受体4轴参与胰腺癌细胞侵袭的体外实验研究

Objective To investigate the expression of chemokine receptor (CXCR)4 in human pancreatic cancer cell lines,and its association with proliferation,adhesion and invasion of pancreatic cancer cells.Methods The CXCR4 mRNA and protein in three pancreatic cancer cell lines were detected by RT-PCR and Western blotting,respectively.Confocal microscopy was used to detect the fluorescence intensity induced by SDF-lα in AsPC-1 cells.MTT test was performed to study the proliferation of pancreatic cancer cells.The invasive ability of pancreatic cell lines was determined by transwell invasion assay kit and the adhesive ability was detected by cell adhesive test in vitro.Results There were expressions of CXCR4 mRNA and protein in different extent in three pancreatic cancer cell lines.The strong expression was seen in AsPC-1 cell line,but weak expression in SW1990 cell line.The CXCR4 was functional expressed on AsPC-1 ceils.SDF-1α improved the proliferation,adhesion and invasion of three pancreatic cancer cell lines,especially in AsPC-1 cell line,while the proliferation in SW1990 cell line was weak.But all above effects of the SDF-1α could be inhibited by AMD3100.Conclasions CXCR4 mRNA and protein were expressed in pancreatic cancer cell lines.The efficacy that SDF-1 can increase the invasive ability of pancreatic cancer ceils through SDF-1/CXCR4 axis is closely related to the expression of CXCR4.     

Wistar大鼠心肌梗死造模后SDF-1/CXCR4的表达

目的检测基质细胞来源因子-1（SDF-1）和其受体CXCR4在心肌梗死后不同部位心肌组织的表达，研究SDF-1／CXCR4轴在心肌梗死后血管新生中的作用，为近一步的研究进行基础研究。方法结扎Wistar大鼠左冠状动脉前降支复制的心肌梗死大鼠模型术后，分别于0．5h，7d，14d，28d处死后提取总RNA和总蛋白，分别用RT—PCR，PCR和Westem印迹检测心肌组织正常区，边缘区，梗死区在梗死后0．5h，7d，14d，28d时SDF-1、CXCR4在mRNA和蛋白水平表达变化情况。结果假手术组和对照组比较，SDF-1在心肌梗死后大鼠的心脏组织中表达有明显的增高（P〈0．01），一直持续到14d以后，在不同心肌部位的表达有明显的差异；CXCR4在心肌梗死后大鼠的心脏组织中表达有明显的增高（P〈0．01）。结论SDF-1／CXCR4轴在心肌梗死后修复中有着重要的作用。     

SDF-1／CXCR4在老年卵巢癌组织中的表达及意义

目的探讨趋化因子SDF-1及其受体CXCR4在老年人上皮性卵巢癌组织中的表达及意义。方法应用westernblotting方法定量检测43例老年患者上皮性卵巢癌组织中SDF-1和CXCR4的蛋白表达情况。结果老年人上皮性卵巢癌组织中SDF-1／CXCR4蛋白表达较卵巢良性肿瘤对照组明显增加,其相对表达量分别为（2．38±0．20）和（3．32±0．26）,差异具有统计学意义（P〈0．05）。结论SDF-1／CXCR4生物学轴可能在老年人卵巢癌的发生与转移过程中起着重要作用。     

SDF-1/CXCR4轴促进慢性创伤愈合作用机制的研究进展

基质细胞衍生因子-1(stromal cell derived factor-1,SDF-1)属于趋化因子家族,与其受体CXCR4组成SDF-1/CXCR4轴,可以调节间充质干细胞(mesenchymal stem cell,MSC)促进慢性创伤的愈合。慢性创伤包括糖尿病足溃疡、动静脉溃疡、压力性溃疡等。利用SDF-1/CXCR4轴调节MSC向慢性创伤部位归巢促进愈合的特点,可以作为一种有潜力的治疗糖尿病足等慢性创伤的手段,该文主要对SDF-1/CXCR4轴调节MSC的作用机制和信号通路进行综述。     

SDF-1/CXCR4信号轴介导的骨髓间充质干细胞治疗心力衰竭的研究进展

心力衰竭(heart failure,HF)是由多种心血管疾病所致心脏泵血功能障碍的一类临床常见危重症。目前逐渐兴起的骨髓间充质干细胞(BMMSCs)移植对HF的治疗带来希望,但由于植入细胞存活率低、迁移能力及心肌修复能力弱而削弱了其治疗效应。通过激活基质细胞衍生因子1/CXC族趋化因子受体4(SDF-1/CXCR4)信号轴可有效地解决上述问题。因此,SDF-1/CXCR4信号轴介导的BMMSCs移植可能成为HF治疗的新方向。     

表皮生长因子受体对支气管哮喘大鼠气道炎症的影响

目的 探讨表皮生长因子受体(EGFR)在支气管哮喘(简称哮喘)大鼠急慢性气道炎症的作用以及阻断EGFR的激活对气道炎症的影响.方法 将45只sD大鼠按随机数字表法分为对照组(A1、A2、A4组)、哮喘组(B1±、B2、B4组)和治疗组(C1、C2、C4组),每组5只,其中1、2和4分别表示激发1、2和4周.治疗组在每次卵清白蛋白激发前1 h给予酪氨酸激酶抑制剂(TKI)金雀异黄素(genistein)20 mg/kg腹腔注射.末次激发后收集BALF行细胞总数及分类计数.肺组织HE染色并行气道黏膜下炎症评分.免疫组织化学及免疫荧光染色观察气道上皮EGFR表达及其酪氨酸磷酸化(活化的ECFR)程度.两组数据间的比较采用单因索方差分析,多组间比较采用g检验.结果 (1)B组各时段BALF中细胞总数及各类细胞绝对计数均高于A组相应时段组(均P<0.05),嗜酸粒细胞在2周末达高峰;C组各时段BALF中细胞总数[分别为(48±6)、(51±9)和(57±12)×105]及嗜酸粒细胞计数[分别为(2.5±0.5)、(2.7±0.6)和(2.6±0.5)×105]均低于相应B时段组[细胞总数分别为(70±10)、(88±8)和(72±10)×105>,嗜酸粒细胞数分别为(5.6±0.8)×105、(6.6±0.6)×105和(4.3±0.4)×105],差异有统计学意义(均P<0.05);C组各时段BALF中中性粒细胞及淋巴细胞计数与相应时段B组比较差异无统计学意义;C1组BALF中上皮细胞数[(2.5±0.5)×105]低于B1组[(4.9±0.7)×103](q=4.671,P<0.05),C4组BALF中上皮细胞数[(5.7±1.2)×105]高于B4组[(4.3±0.4)×105](q=4.012,P<0.05).(2)C4组气道黏膜下炎症评分(3.6±0.6)低于B4组(5.1±0.6)(q=4.923,P<0.05).(3)B组各时段各级气道EGFR蛋白表达均高于相应时段A组(均P<0.01);气道上皮EGFR活化程度A组分别为(1.84±0.26)、(1.43±0.29)和(1.67±0.32),B组分别为(3.69±0.43)、(3.57±0.29)和(4.46±0.47),C组分别为(3.12±0.24)、(3.00±0.28)和(2.69±0.54),B组各时段气道上皮EGFR活化程度均高于相应时段A组(均P<0.05);C组各时段气道上皮EGFR活化程度均弱于相应时段B组(均P<0.05).(4)相关分析显示气道上皮EGFR表达及其活化程度均与BALF中细胞总数、嗜酸粒细胞、中性粒细胞及淋巴细胞绝对计数,以及气道炎症评分呈明显正相关.结论 哮喘大鼠气道上皮EGFR参与气道炎症,TKI金雀异黄素有一定抑制哮喘大鼠急慢性气道炎症的作用.     

不同剂量虫草活力素对大鼠支气管哮喘模型慢性气道炎症的作用机制研究

目的 对不同剂量虫草活力素(简称虫草)在大鼠支气管哮喘(简称哮喘)模型慢性气道炎症中的抑制作用及相关机制进行初步探讨.方法 Wister大鼠,随机分为对照组、单纯模型组、虫草20 mg/kg、50 mg/kg组、布地奈德(BUD)组及BUD联合虫草素干预组.卵蛋白致敏建立大鼠哮喘模型后给予药物干预8周,对各组支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)进行细胞分类计数及观察肺组织的病理变化,同时应用双抗体夹心ABC-ELISA法测定血清和BALF的哮喘相关细胞因子水平.结果 与单纯模型组比较,虫草两种剂量治疗组均降低慢性哮喘大鼠BALF的细胞总数和嗜酸粒细胞数,差异有统计学意义(P<0.05),并呈剂量相关性;HE染色显示大剂量虫草、BUD治疗组及联合用药组较单纯模型组炎症细胞浸润、平滑肌肥厚及黏膜肺组织水肿等炎症表现明显减轻;较单纯模型组,虫草治疗组血清及BALF的白介素4(IL-4)、IL-14水平下降,干扰素γ升高,差异有统计学意义(P<0.05),并呈剂量相关性.结果 一定剂量的虫草可通过上调T辅助细胞1(Th1)相关细胞因子,下调Th2相关细胞因子,减少嗜酸粒细胞等炎症细胞渗出,抑制哮喘的慢性气道炎症,并与糖皮质激素具有协同作用.     

PTEN在支气管哮喘大鼠气道炎症中的作用

目的探讨PTEN在支气管哮喘（简称哮喘）人鼠气道炎症中的作用。方法20只SPF级雄性SD大鼠随机分为2组。对照组和哮喘组。以卵清白蛋白致敏激发法复制大鼠哮喘模型,每只大鼠左肺留取肺组织,右肺进行支气管肺泡灌洗歼留取支气管肺泡灌洗液（BALF）。对BALF进行细胞分类计数;应用双抗体夹心酶联免疫吸附试验（Sandwich ELISA）法测定BALF中IL-4、IL-12浓度;采用免疫组织化学法和Western blot法测定PTEN蛋白的表达和量的变化。结果①BALF IL-4的浓度哮喘组显著高于对照组,BALF中IL-12的浓度哮喘组屁著低于对照组（P值均〈0．01）;②免疫组织化学显示PTEN蛋白主要表达细胞是支气管上皮细胞,Western blot法显示哮喘组支气管PTEN蛋白的表达显著低于对照组（P〈0．01）;③支气管上皮细胞PTEN蛋白表达量分别与BALF中的IL-4浓度呈显著负相关,与BALF中的IL—12浓度呈显著正相关。结论哮喘大鼠PTEN蛋白表达明显减少,它能减少Th2因子的表达,可能与哮喘大鼠气道炎症中Th1／Th2平衡密切相关。     

血管内皮生长因子受体抑制剂对小鼠支气管哮喘模型气道炎症和气道重塑的影响

目的研究血管内皮生长因子(VEGF)受体抑制剂对变应性气道炎症和气道重塑的影响,阐明VEGF与支气管哮喘(简称哮喘)以及气道重塑的关系。方法BALB/c小鼠按随机数字表法分为正常对照组(A组)、哮喘模型组(B组)、VEGF受体抑制剂治疗组(C组),每组各10只。用酶联免疫吸附测定(ELISA)法对各组小鼠支气管肺泡灌洗液(BALF)和血清中VEGF进行定量分析;用免疫组化法检测VEGF在小鼠肺组织内的表达水平。采用医学图像分析软件测定支气管管壁厚度(WAt/P i)、支气管平滑肌厚度(WAm/P i)、支气管平滑肌细胞计数(N/P i)及肺组织切片中的血管计数、血管壁平滑肌厚度、血管壁平滑肌细胞计数。结果BALF中细胞总数和嗜酸粒细胞比值B组分别为(142±63)×107/L、98.0±46.9,A组分别为(30±14)×107/L、0.7±1.1,C组分别为(41±17)×107/L、4.9±3.5,A组和C组BALF中细胞总数和嗜酸粒细胞比值分别与B组比较差异有统计学意义(P均<0.01)。B组BALF中上清液和血清中VEGF水平分别为(55±26)pg/m l、(72±26)pg/m l,A组分别为(37±9)pg/m l、(49±18)pg/m l,C组分别为(34±3)pg/m l、(43±19)pg/m l,A组与B组、C组与B组间比较差异均有统计学意义(P均<0.05)。免疫组化结果显示,B组大部分支气管平滑肌、黏膜上皮细胞、肺泡上皮细胞和血管周围VEGF均呈阳性表达,而A组和C组几乎没有VEGF的表达。图像分析显示,B组WAt/P i、WAm/P i、N/P i分别为(17±5)μm2/μm、(6.3±2.2)μm2/μm、(0.050±0.020)个/μm,A组分别为(8±3)μm2/μm、(3.2±0.8)μm2/μm、(0.027±0.017)个/μm,A组与B组比较差异有统计学意义(P分别<0.01、0.05)。B组和A组血管计数分别为(19±3)个、(10±5)个,A组与B组比较差异均有统计学意义(P<0.01)。经抑制剂治疗后C组WAm/P i、血管计数分别为(4.5±1.3)μm2/μm、(11±3)个,C组与B组比较差异均有统计学意义(P均<0.05)。结论VEGF在小鼠哮喘模型气道及肺内过度表达,并参与了哮喘的发病和气道重塑过程。VEGF受体抑制剂可明显改善哮喘小鼠的变应性气道炎症和气道重塑的病理生理过程。