免疫性血小板减少症Th1和Th2趋化因子及其受体表达的研究

目的免疫性血小板减少症(immune thrombocytopenia,ITP)是一种获得性自我免疫紊乱导致的出血性疾病,本文旨在研究ITP患者体内T-helper 1(Th1)趋化因子CCL5、CXCL11及其受体CCR5、CXCR3和Th2趋化因子CCL11及其受体CCR3的表达变化,以探讨趋化因子及其受体在ITP免疫异常中的作用。方法选择28名活动性ITP患者为研究对象,随机选取21名与ITP患者相匹配的健康人作对照组。以酶联免疫吸附试验(enzyme-linked immunosorbent assay,ELISA)检测ITP患者和对照组血浆中CCL5、CXCL11和CCL11的含量,采用实时聚合酶链式反应(real-time polymerase chain reaction,RT-PCR)检测外周血单个核细胞(PBMC)CCL5、CXCL11、CCL11、CCR5、CXCR3以及CCR3 mRNA的表达。结果 Th1相关趋化因子CCL5和Th2相关趋化因子CCL11在活动性ITP患者血浆中含量均低于正常对照组(P0.05),而Th1趋化因子CXCL11升高(P0.05);ITP患者PBMC的CXCL11 mRNA表达高于对照组,CCL11 mRNA表达低于对照组(P0.05),而CCL5 mRNA在ITP组与对照组差异无显著性(P0.05)。ITP患者血浆中Th1相关趋化因子受体CCR5和CXCR3表达量高于对照组(P0.05),Th2相关趋化因子受体CCR3降低(P0.05)。经过糖皮质激素等治疗有效的22例患者,Th1趋化因子CXCL11、趋化因子受体CCR5和CXCR3均下降(P0.05),血浆CCL5含量回升,但是仍低于对照组(P0.05);而Th2相关趋化因子CCL11及其受体CCR3均回升(P0.05)。结论 Th1/Th2相关趋化因子及其受体的异常表达可能参与了ITP的免疫紊乱,是ITP发病因素之一;阻断Th1相关趋化因子与其受体的作用途径,可望成为ITP的生物调控靶点。     

趋化因子受体CXCR4及其配体SDF-1与强直性脊柱炎发病的相关性研究

目的：探讨趋化因子及其受体在强直性脊柱炎（AS）时的变化及其在关节炎发病机制中的作用。方法： 用含588个基因的cDNA微阵列方法比较13例AS患者和7例健康志愿者外周血单个核细胞（PBMC）基因的表达水平；用流式细胞术对PBMC表面C-X-C趋化因子受体4(CXCR4)蛋白表达水平进行检测, 并以免疫组化方法和ELISA方法检测其配体SDF-1（基质来源因子）在滑膜成纤维细胞和滑膜组织的表达情况。结果： AS的588 个基因谱和健康志愿者有明显区别，其中趋化因子受体(CXCR4)在AS外周血的单核细胞和CD8+的T淋巴细胞表达显著高于健康志愿者组(P＜0.05）。 SDF-1在AS病人的PBMC、滑液单个核细胞（SFMC）、关节液成纤维细胞和关节滑膜衬里层细胞的表达也增高。 结论： 趋化因子受体CXCR4及其产物在AS患者的PBMC表达明显增多, SDF-1在AS关节炎患者滑膜成纤维细胞和滑膜组织表达增多，提示CXCR4及其配体SDF-1这一信息通道在AS炎症病变的发展与持续中可能起重要作用。     

大疱性类天疱疮皮损中Th1/Th2趋化因子及其受体的表达

目的:研究Th1趋化因子CXCL9/MIG、CXCL10/IP-10、CXCL11/I-TAC和Th2型趋化因子CCL22/MDC及其受体CXCR3、CCR4在大疱性类天疱疮(BP)皮损中的表达。方法:应用免疫组化方法检测30例BP患者皮损及20例正常皮肤中CX-CL9、CXCL10、CXCL11、CCL22、CXCR3和CCR4的表达。结果:BP皮损中4种趋化因子及其受体的表达均高于正常皮肤。其中,Th1趋化因子CXCL9、CXCL10和CXCL11及其受体CXCR3的阳性率分别为50%(15/30)、46.7%(14/30)、46.7%(14/30)和53.3%(16/30),Th2趋化因子CCL22及其受体CCR4的阳性率分别为66.7%(20/30)、56.7%(17/30)。正常对照中CXCL9、CX-CL10、CXCL11及其受体CXCR3的阳性率分别为10.0%(2/20)、10.0%(2/20)、15.0%(3/20)和15.0%(3/20),CCL22及其受体CCR4的阳性率分别为20.0%(4/20)和25.0%(5/20)。结论:Th1趋化因子CXCL9、CXCL10、CXCL11和Th2趋化因子CCL22及其受体CXCR3和CCR4在BP皮损中表达升高,提示它们可能在BP的发病机制中起一定作用。     

滤泡调节性T细胞减少与类风湿性关节炎发生和发展相关

目的探讨滤泡调节性T(Tfr)细胞在类风湿性关节炎(RA)发病中的可能机制。方法采用流式细胞术检测20例RA患者及20例健康体检者外周血中CD4~+CXCR5~+FOXP3~+ICOS~+ Tfr细胞的百分比并分析Tfr细胞比例与RA临床实验室检测指标的相关性;ELISA检测患者血清中白细胞介素10(IL-10)、 IL-12、 IL-2、转化生长因子β(TGF-β)、 CXC趋化因子配体13(CXCL13)的水平;实时定量PCR检测外周血单个核细胞(PBMC)的B细胞淋巴瘤因子6(Bcl6)、 B淋巴细胞诱导成熟蛋白1(Blimp-1)的mRNA表达;免疫组织化学法检测RA患者关节滑膜Bcl6、 CXCL13的表达。结果与健康对照组相比,RA患者外周血Tfr细胞比例显著下降;Tfr细胞百分比与C反应蛋白(CRP)、类风湿因子(RF)、血沉(ESR)、 28关节疾病活动度评分(DAS28)水平呈负相关;RA患者血清中IL-12、 CXCL13表达水平显著升高,IL-2、 IL-10、 TGF-β表达水平显著降低;RA患者PBMC的Bcl6 mRNA水平显著增高,而Blimp-1 mRNA的表达显著降低;RA患者的关节滑膜中观察到Bcl6、 CXCL13显著高表达。结论外周血Tfr细胞比例减少可能与RA的发生发展有关。     

类风湿关节炎模型大鼠滑膜组织中证实有髓样细胞诱发受体2的表达

背景：髓样细胞诱发受体2在类风湿关节炎活动期患者滑膜组织呈高表达,但其在类风湿关节炎发病机制中发挥的作用,目前并不清楚。 目的：观察髓样细胞诱发受体2在牛源性Ⅱ型胶原诱导的关节炎大鼠模型滑膜组织中的表达。 方法：制备胶原诱导关节炎模型大鼠,动态观察大鼠各项关节炎的活动指标和滑膜组织的病理学改变,RT-PCR法检测滑膜组织中髓样细胞诱发受体2、肿瘤坏死因子α、白细胞介素1β、白细胞介素10 mRNA的表达,Western blot及免疫组织化学法分别检测关节滑膜组织中髓样细胞诱发受体2的蛋白表达及定位。 结果与结论：模型组大鼠免疫13 d后出现足爪红肿,关节炎指数评分逐渐升高(P < 0.01),炎症高峰期在19-25 d,苏木精-伊红染色可见诱导性关节炎大鼠滑膜组织增生及炎性细胞浸润、软骨骨质破坏。与对照组相比,模型组大鼠关节滑膜髓样细胞诱发受体2的mRNA和蛋白的表达、肿瘤坏死因子α、白细胞介素1β mRNA表达均明显升高(P < 0.05或P < 0.01),白细胞介素10 mRNA表达显著降低(P < 0.05)。结果证实,髓样细胞诱发受体2可能是类风湿关节炎模型大鼠发病过程中一个重要的炎症调节递质,其反应性升高在类风湿关节炎模型大鼠发病中发挥着重要作用。 中国组织工程研究杂志出版内容重点：肾移植;肝移植;移植;心脏移植;组织移植;皮肤移植;皮瓣移植;血管移植;器官移植;组织工程全文链接：     

TNF-α和IFN-γ对肾小管上皮细胞趋化因子表达的影响

目的探讨细胞因子TNF-α和IFN-γ对肾小管上皮细胞趋化因子CXCL9、CXCL10和CXCL11表达的影响。方法分别以TNF-α以及IFN-γ和TNF-α联合作用肾小管上皮细胞HK-2不同时间后,用Real-time PCR和ELISA分别检测CXCL9、CXCL10和CXCL11 mRNA和蛋白水平。用流式细胞术检测淋巴细胞表面CXCR3表达情况,通过趋化实验检测细胞培养上清对淋巴细胞的趋化作用。结果肾小管上皮细胞在TNF-α作用12 h后能够诱导趋化因子CXCL9、CXCL10和CXCL11mRNA表达上调,CXCL9 mRNA的表达在48 h达到高峰,而CXCL10和CXCL11 mRNA表达高峰在12 h;CXCL9、CXCL10和CXCL11蛋白的基础分泌水平均较低,在TNF-α作用12 h后,分泌水平也逐渐升高,CXCL9、CXCL10在48 h时分泌达到高峰,CXCL11分泌高峰在72 h。与TNF-α单独作用组和IFN-γ单独作用组相比,TNF-α和IFN-γ联合作用使肾小管上皮细胞趋化因子CXCL9、CXCL10和CXCL11 mRNA表达和蛋白分泌明显增强(P<0.05)。与新鲜分离的淋巴细胞相比,活化的淋巴细胞表面的CXCR3表达明显升高(P<0.05)。TNF-α以及IFN-γ和TNF-α联合作用HK-2细胞培养上清对活化的淋巴细胞具有明显的趋化作用(P<0.05)且能被抗CXCR3抗体所阻断(P<0.05)。结论细胞因子TNF-α能诱导肾小管上皮细胞趋化因子CXCL9、CXCL10和CXCL11表达,且与IFN-γ联合作用对趋化因子的表达具有协同作用。     

IFN-γ诱导的肾小管上皮细胞CXCL9、CXCL10和CXCL11的表达

目的 探讨IFN-γ对人近端肾小管上皮细胞(HK-2)趋化因子CXCL9、CXCL10和CXCL11分泌的影响以及趋化因子的功能.方法 IFN-γ分别作用HK-2细胞不同时间后,用real-time PCR检测其CXCL9、CXCL10和CXCL11 mRNA的表达,以ELISA检测细胞培养上清中分泌趋化因子CXCL9、CXCL10和CXCL11的蛋白水平,用流式细胞术检测淋巴细胞表面CXCR3表达情况,通过趋化实验检测IFN-γ作用HK-2细胞培养上清对淋巴细胞的趋化作用.结果 IFN-γ作用12h后,HK-2细胞分泌趋化因子开始升高,CXCL9 mRNA的表达在48 h达到高峰,CXCL10、CXCL11 mRNA的表达在24h达到高峰.在蛋白水平上,HK-2细胞经IFN-γ诱导12 h后,开始分泌趋化因子蛋白,CXCL9、CXCL11的分泌在IFN-γ作用HK-2细胞72 h达到高峰,CXCL10的分泌在48 h达到高峰.与新鲜分离的淋巴细胞相比活化的淋巴细胞表面的CXCR3表达明显升高.IFN-γ作用HK-2细胞培养上清对活化的淋巴细胞具有明显的趋化作用且能被抗CXCR3抗体所阻断.结论 IFN-γ能够明显上调肾小管上皮细胞趋化因子CXCL9、CXCL10和CXCL11 mRNA表达和蛋白的分泌.     

趋化因子受体3及其配体参与结核病免疫机制和诊断的研究进展

趋化因子（CXCL）9、CXCL10、CXCL11是目前研究较多且与结核免疫密切相关的3种趋化因子，同属于趋化因子受体3(CXCR3)配体。CXCL9、CXCL10、CXCL11主要作用于活化的CD4细胞（CD4+T细胞）、细胞毒性T淋巴细胞（CD8+T细胞）和自然杀伤（NK）细胞，参与结核病发病及免疫过程，在细胞免疫中发挥重要作用。本文总结了近5年CXCL9、CXCL10及CXCL11在结核病免疫机制和检测中作用的相关研究，以期为结核病诊断和疗效评估提供新的方法。     

趋化因子受体CXCR3与其配体在小鼠暴发性肝炎发病中免疫学机制研究

目的 探讨趋化因子受体CXCR3与其配体(CXCL9/Mig,CXCL10/IP-10)在小鼠暴发性肝炎淋巴细胞迁移和急性肝衰竭中的作用.方法 6～8周龄雌性BALB/cJ小鼠腹腔注射100 PFU 3型鼠肝炎病毒(MHV-3),采用流式细胞术检测感染MHV-3后的BALB/cJ小鼠肝脏、脾脏和外周血T细胞和NK细胞的比例、数量以及其表面趋化因子受体CXCR3的表达频率.实时定量PCR技术检测感染MHV-3后的BALB/cJ小鼠肝内趋化因子CXCL9和CXCL10 mRNA的表达水平.Transwell细胞迁移试验评估病毒感染的肝细胞及CXCL10对脾脏淋巴细胞的趋化作用.结果 BALB/cJ小鼠感染MHV-3后,肝脏T细胞和NK细胞的数量及CXCR3的表达频率均显著增加,然而在脾脏和外周血均显著减少.实时定量PCR检测证实,感染MHV-3 48 h后,肝内趋化因子CXCL9和CXCL10 mRNA的表达比感染前分别上升了15.6和98.8倍.体外Transwell试验表明,病毒感染的肝细胞及重组CXCL10/IP-10蛋白对脾脏T细胞和NK细胞具有明显的趋化作用,并且这种趋化作用能被抗-CXCL10抗体显著阻断.结论 趋化因子受体CXCR3与其配体(CXCL9和CXCL10),尤其是CXCL10的相互作用在小鼠暴发性肝炎肝内淋巴细胞的募集及随后的坏死性炎症和急性肝衰竭中可能发挥着重要作用.

Abstract：

Objective To investigate the role of the chemokine receptor CXCR3 and its ligands in the migration of lymphocytes and acute hepatic failure. Methods BALB/cJ mice (6-8 weeks, female) were intraperitoneally injected with 100 PFU mouse hepatitis virus-3(MHV-3). The proportions and numbers of T cells and NK cells in liver, spleen, and blood as well as the expression of CXCR3 in T cells, and NK cells post MHV-3 infection was analyzed by flow cytometry. The hepatic mRNA level of the CXCR3-associated chemokines(CXCL9 and CXCL10) was detected by real-time PCR. A transwell migration assay was used to assess the chemotactic effect of MHV-3-infected hepatocytes and CXCL10 on the splenic lymphocytes. Results Following MHV-3 infection, the number of hepatic NK cells and T cells and the frequencies of hepatic NK cells and T cells expressing CXCR3 increased markedly; however, in the spleen and peripheral blood, they both decreased significantly. Moreover, the hepatic mRNAs levels of CXCL9 and CXCL10 were significantly elevated post infection. The transwell migration assay demonstrated that MHV-3-infected hepatocytes have the capacity to attract and recruit the splenic NK cells and T cells, and CXCL10 plays a key role in lymphocyte mobilization from the spleen. Conclusion Interactions between CXCR3 and its ligands (CXCL9 and CXCL10),especially CXCL10 may play a key role in the recruitment of intrahepatic lymphocytes and subsequent necroinflammation and acute hepatic failure in MHV-3 infection.     

CXCL16/CXCR6与炎症性疾病

多种临床疾病(包括肿瘤的发生)与炎症相关,因而趋化因子及其受体愈来愈受到广泛关注.近年有研究发现:人CXC型趋化因子配体16(CXC chemokine ligand 16,CXCL16)及其受体CXC型趋化因子受体6 (CXC chemokine receptor 6,CXCR6)在肾炎、肺部疾患、动脉粥样硬化、冠状动脉疾病、类风湿性关节炎等多种炎症性病变组织中表达;并且,在前列腺癌、结肠癌、乳腺癌等炎症相关肿瘤的肿瘤细胞或浸润性淋巴细胞上也有表达.CXCL16通过CXCR6介导免疫细胞向病变组织趋化,影响疾病转归,甚至参与肿瘤细胞增殖或血管生成.对CXCL16/CXCR6的深入研究,将为炎症性疾病的诊断和炎症相关肿瘤的预后提供参考.     

CXCR6-CXCL16 interaction in the pathogenesis of Juvenile Idiopathic Arthritis

In order to evaluate the role of CXCR6/CXCL16 in driving lymphocyte migration into inflamed joints of children with oligoarticular Juvenile Idiopathic Arthritis (JIA) we analysed CXCR6 expression and functional capability in lymphocytes from synovial fluid (SF) by flow cytometry, by real-time polymerase chain reaction (RT-PCR) and migration assays. Furthermore, CXCR6 and CXCL16 expression in synovial tissue (ST) was analysed by immunohistochemistry. T cells isolated from SF of patients with JIA expressed CXCR6 which was functionally active as shown by chemotactic assays. The same cells expressed CXCR3 and it exerted a migratory activity in response to CXCL10. CXCL16 and CXCR6 were intensively expressed on the synovium cells, respectively on macrophages, synoviocytes and endothelial cells and on lymphocytes, synoviocytes and endothelial cells. Taken together, these data suggest that CXCR6 and CXCR3 act coordinately with respective ligands and are involved in the pathophysiology of JIA-associated inflammatory processes.     

Chemokine and chemokine receptor analysis reveals elevated interferon-inducible protein-10 (IP)-10/CXCL10 levels and increased number of CCR5+ and CXCR3+ CD4 T cells in synovial fluid of patients with enthesitis-related arthritis (ERA)

Chemokines and chemokine receptors play a major role in homing of cells to the site of inflammation. Enthesitis-related arthritis (ERA) is a chronic inflammatory arthritis and no data are available on chemokines and their receptors in ERA. Blood (20) and synovial fluid (SF) (11) was collected from patients with ERA, and peripheral blood (PB) was collected from 12 patients with polyarticular juvenile idiopathic arthritis (JIA), nine patients with systemic onset and 18 healthy controls. Chemokines [interleukin (IL)-10/CXCL10, thymus and activation-regulated chemokine (TARC)/CCL17 and regulated upon activation normal T cell expressed and secreted (RANTES)/CCL5] were measured in serum and SF. Chemokine receptor expression was measured by flow cytometry. There was no difference in blood CD4(+) T cells bearing CCR5, CCR4 and CXCR3 in ERA and healthy controls. In paired samples the median frequency of CCR5(+) CD4(+) T cells was higher in SF compared to PB (15.8 versus 3.9%, P < 0.005), as was the frequency of CXCR3(+) T cells (21.61% versus 12.46%, P < 0.05). Median serum interferon-inducible protein-10 (IP-10)/CXCL10 levels were higher in patients with ERA compared to controls (139 versus 93 pg/ml; P < 0.05). Further median SF IP-10/CXCL10 levels were higher than the serum levels (2300 pg/ml versus 139 pg/ml; P < 0.01). Serum levels of RANTES/CCL5 were higher in patients (150 ng/ml) compared to control (99 ng/ml; P < 0.01). The SF levels were significantly lower compared to serum (P < 0.05). TARC/CCL17 levels in SF were lower than serum. There is increased homing of CCR5 and CXCR3(+) CD4 cells to the SF. Increased SF levels of IP-10/CXCL10 may be responsible for this migration in patients with ERA.     

Anti-Cyclic Citrullinated Peptide Antibodies in Patients with Juvenile Idiopathic Arthritis

The objectives were to determine the prevalence and clinical significance of anti-cyclic citrullinated peptide (anti-CCP) antibodies in patients with juvenile idiopathic arthritis (JIA). Anti-CCP antibodies were checked by ELISA in 68 children with JIA, 38 males and 30 females with mean age of 10.6 (±4.02) years and disease duration of 3.7 (±1.8) years. Thirty-eight (56%) patients had polyarticular disease, 20 (29%) patients had oligoarticular disease and 10 (15%) patients had systemic onset disease. All patients had their antinuclear antibodies (ANA), rheumatoid factor (RF) and ESR checked and x-rays performed to look for erosions. Results were compared to those of 20 healthy children, 14 children with juvenile systemic lupus erythematosus (JSLE) and 30 adults with rheumatoid arthritis (RA). Anti-CCP antibodies were positive in 14/68 (20.6%) patients with JIA, all had polyarticular-onset disease. All patients with positive anti-CCP antibodies had RF-positive polyarthritis. Anti-CCP antibodies were negative in all patients with oligoarticular-onset and systemic-onset disease including 2 patients with extended oligoarthritis. Anti-CCP antibodies were negative in healthy and JSLE controls but were positive in 20/30 (66.5%) adults with RA. Anti-CCP antibodies correlated significantly with joint erosions in patients with JIA (p?=?0.004) but no significant relation was found between anti-CCP antibodies and ANA positivity or raised ESR. These data confirm that anti-CCP antibodies are less prevalent in JIA than adult RA but are detectable in a significant proportion of RF-positive patients with polyarticular-onset JIA. The current study showed significant relation between anti-CCP positivity and erosive joint disease in JIA.     

CXCR3 and CCR5 ligands in rheumatoid arthritis synovium

The pathogenesis of rheumatoid arthritis (RA) may be mediated by Th1-type T cells. Since chemokine receptors CXCR3 and CCR5 are preferentially expressed on Th1 cells, we tested the expression and regulation of several chemokines, including those that signal through CXCR3 (interferon-gamma-inducible protein of 10 kDa, IP-10, CXCL10; and monokine induced by interferon-gamma, Mig, CXCL9) and CCR5 (macrophage inflammatory protein (Mip)-1 alpha, CCL3; and Mip-1 beta, CCL4) in RA synovial fluids, synovial tissues, and blood. Synovial fluid (SF) protein levels of IP-10 (32.1 +/- 10.5 ng/ml), Mig (15.0 +/- 6.4 ng/ml), Mip-1 beta (0.7 +/- 0.3 ng/ml), and Mip-1 alpha (0.8 +/- 0.1 ng/ml) were 100-, 50-, 25-, and 2-fold elevated in RASF compared to control SF (P < 0.001, P < 0.001, P < 0. 001, and P < 0.02, respectively). Tissue levels of IP-10, Mig, and Mip-1 beta were significantly higher in RA than in OA (P < 0.01). Serum levels of IP-10 (3.1 +/- 1.2 ng/ml) were higher in patients with seropositive RA compared to controls (1.2 +/- 0.2 ng/ml) (P < 0.02). There was a gradient of IP-10, Mig, Mip-1 alpha, and Mip-1 beta from the blood into the synovial fluid in RA. Infiltrating T cells around high endothelial venules in RA synovium and 90 +/- 3% of SF CD3(+)CD4(+) T cells expressed CXCR3, and 85 +/- 2% of SF CD3(+)CD4(+) T cells expressed CCR5. Chemokines, including IP-10, Mig, Mip-1 alpha, and Mip-1 beta, may participate in the selective recruitment of CCR5(+)CXCR3(+) T cells to the inflamed synovium.     

CXCL12／CXCR4对胰腺癌细胞生物学行为的影响

目的探讨CXCLl2／CXCR4生物轴对胰腺癌细胞增殖、侵袭等生物学行为的影响。方法体外培养胰腺癌细胞系Miapaca-2,将其分为对照组、CXCLl2组和AMD3100组。（1）采用RT—PCR检测胰腺癌细胞中CXCLl2、CXCR4、基质金属蛋白酶-2（MMP-2）、基质金属蛋白酶-9（MMP-9）和人尿激酶型纤溶酶原激活物（uPA）mRNA的表达水平;（2）采用CCK-8法检测各组细胞的增殖情况;（3）采用Transwell侵袭实验检测CXCLl2／CXCR4对胰腺癌细胞趋化活性的影响。结果胰腺癌细胞系Miapaca-2中CXCLl2mRNA未见表达,而CXCR4mRNA在胰腺癌细胞中有表达。MMP-2、MMPO和uPAmRNA在AMD3100组、对照组和CXCLl2组中的表达水平呈递增趋势,差异具有统计学意义（P〈0．05）。胰腺癌细胞的增殖和侵袭能力在CXCLl2组明显增强,而在AMD3100组得到了有效的抑制,组间差异有统计学意义（P〈0．05）。结论趋化因子CXCLl2及其受体CXCR4所构成的生物轴对胰腺癌细胞的增殖和侵袭能力发挥着重要的作用。     

Long-term exposure of chemokine CXCL10 causes bronchiolitis-like inflammation

Chemokines and chemokine receptors have been implicated in the pathogenesis of bronchiolitis. CXCR3 ligands (CXCL10, CXCL9, and CXCL11) were elevated in patients with bronchiolitis obliterans syndrome (BOS) and chronic allorejection. Studies also suggested that blockage of CXCR3 or its ligands changed the outcome of T-cell recruitment and airway obliteration. We wanted to determine the role of the chemokine CXCL10 in the pathogenesis of bronchiolitis and BOS. In this study, we found that CXCL10 mRNA levels were significantly increased in patients with BOS. We generated transgenic mice expressing a mouse CXCL10 cDNA under control of the rat CC10 promoter. Six-month-old CC10-CXCL10 transgenic mice developed bronchiolitis characterized by airway epithelial hyperplasia and developed peribronchiolar and perivascular lymphocyte infiltration. The airway hyperplasia and T-cell inflammation were dependent on the presence of CXCR3. Therefore, long-term exposure of the chemokine CXCL10 in the lung causes bronchiolitis-like inflammation in mice.     

CXC趋化因子受体4和叉头蛋白3基因蛋白及mRNA在儿童纵隔神经母细胞瘤SK-N-SH和LAN-5细胞中的表达及环磷酰胺对其的影响

目的观察环磷酰胺对儿童纵隔神经母细胞瘤LAN-5和SK-N-SH细胞CXC趋化因子受体4(CXCR4)和叉头蛋白3(Foxp3)表达的影响。方法采用实时定量聚合酶链反应(Real-time PCR)法检测CXCR4和Foxp3基因mRNA的相对表达,MTT法检测细胞增殖,流式细胞仪分析CXCR4和Foxp3基因的表达。结果CXCR4和Foxp3在LAN-5和SK-N-SH细胞高表达;环磷酰胺对LAN-5和SK-N-SH细胞的IC50分别为6.5μmol/L和3.9μmol/L;环磷酰胺显著降低了LAN-5细胞表面CXCR4基因蛋白的表达(P0.01),也显著降低了SK-N-SH细胞CXCR4 mRNA的表达(P0.05),同时环磷酰胺显著下调Foxp3基因蛋白(P0.05)和Foxp3 mRNA(P0.01)在LAN-5细胞的表达。结论 CXCR4和Foxp3可能为神经母细胞瘤化疗的潜在靶点。