无症状沙眼衣原体和解脲支原体感染对早孕绒毛滋养细胞表达CXCL12/CXCR4的影响

目的研究无症状沙眼衣原体和解脲支原体感染患者趋化性细胞因子CXCL12／CXCR4在母胎界面的表达情况，探讨其对早孕绒毛滋养细胞侵蚀力的影响。方法采用免疫组化法观察正常早孕和无症状沙眼衣原体、解脲支原体感染患者早孕绒毛组织中的CXCL12／CXCR4的定位和分布，采用免疫印迹、RT—PCR法检测其蛋白和mRNA的表达情况；将无症状沙眼衣原体和解脲支原体感染患者绒毛外滋养细胞进行分离培养和鉴定，应用免疫细胞化学法检测CXCL12／CXCR4的表达。结果免疫组化检测显示正常妊娠时CXCL12、CXCR4主要表达于绒毛滋养细胞、绒毛间质细胞以及蜕膜组织中；RT—PCR法和Western bolt检测显示：与正常妊娠相比，无症状沙眼衣原体和解脲支原体绒毛感染者的早孕绒毛组织中CXCL12、CXCR4 mRNA和蛋白表达减弱；正常早孕绒毛外细胞滋养细胞中CXCL12、CXCR4均呈强阳性表达，而无症状沙眼衣原体和解脲支原体绒毛感染者其绒毛外细胞滋养细胞中CXCL12、CXCR4表达减弱。结论CXCL12／CXCR4受体配体系统参与了绒毛外滋养细胞的侵蚀，无症状沙眼衣原体和解脲支原体感染状态下可能影响早孕绒毛CXCL12／CXCR4受体配体系统表达，导致母胎界面出现免疫紊乱现象，从而对早孕绒毛滋养细胞侵蚀力造成影响。     

Expressions of chemokine receptor CXCR4 and its ligand CXCL12 in salivary adenoid cystic carcinoma

Chemokine ,achemocraticsuperfamilyincytokines ,isagroupofsecretorymonochainmicromolecularproteinpolypeptideswitharelativequalityof 80 0 0 - 12 0 0 0 Itplaysanactiveroleininflammatoryreactionanddevelop mentofimmunediseasesbyinducingandinactivatingmi grationofimmunocytesandadhesionofendotheliocytesandbyregulatinginfiltrationandhomingofimmunocytesandlocalvascularformation[1] .Recentstudiesfoundthatche mokineanditsreceptorwerecloselyrelatedwithtumorin vasionandmetastasis ,especiallyCXCL12anditss…     

Effect of human cytomegalovirus on invasive capability of early pregnant extravillous cytotrophoblasts

The effect of human cytomegalovirus (HCMV) on invasive capability of early pregnant extravillous cytotrophoblasts (EVTs) was investigated in vitro.Primary EVTs were obtained by complex phosphoesterasum...     

Pro-pigmentary action of 5-fluorouracil through the stimulated secretion of CXCL12 by dermal fibroblasts

Background:There is growing evidence that 5-fluorouracil (5-FU) combined with therapeutic trauma can effectively induce skin repigmentation in vitiligo patients who are unresponsive to conventional treatments. Previous studies have mainly focused on identifying the antimitotic activity of 5-FU for the treatment of skin cancer, but few studies have investigated its extra-genotoxic actions favoring melanocyte recruitment.Methods:We utilized the full thickness excisional skin wound model in Dct-LacZ transgenic mice to dynamically assess the migration of melanocytes in the margins of wounds treated with or without 5-FU. The in-situ expression of CXCL12 was examined in the wound beds using immunofluorescence staining. Quantitative real-time polymerase chain reaction and Western blotting analyses were performed to detect the expression levels of CXCL12 mRNA and protein in primary mouse dermal fibroblasts treated with or without 5-FU. Transwell assays and fluorescein isothiocyanate (FITC)-phalloidin staining were used to observe cell migration and filamentous actin (F-actin) changes of melan-a murine melanocytes.Results:Whole mount and cryosection X-gal staining showed that the cell numbers of LacZ-positive melanocytes were much higher in the margins of dorsal and tail skin wounds treated with 5-FU compared with the controls. Meanwhile, CXCL12 immunostaining was significantly increased in the dermal compartment of wounds treated with 5-FU (control vs. 5-FU, 22.47 ± 8.85 vs. 44.69 ± 5.97, P < 0.05). Moreover, 5-FU significantly upregulated the expression levels of CXCL12 mRNA (control vs. 5-FU, 1.00 ± 0.08 vs. 1.54 ± 0.06, P < 0.05) and protein (control vs. 5-FU, 1.00 ± 0.06 vs. 2.93 ± 0.10, P < 0.05) in cultured fibroblasts. Inhibition of the CXCL12/CXCR4 axis suppressed melanocyte migration in vitro using a CXCL12 small interfering RNA (siRNA) or a CXCR4 antagonist (AMD3100).Conclusion:5-FU possesses a pro-pigmentary activity through activation of the CXCL12/CXCR4 axis to drive the chemotactic migration of melanocytes.     

Mobilization efficiency of granulocyte colony-stimulating factor and stem cell factor to bone marrow mononuclear cells and mechanisms

The mobilization efficiency of granulocyte colony-stimulating factor (G-CSF) and stem cell factor (SCF) to bone marrow mononuclear cells (MNCs) in mice was observed, and the changes of CXCL12/CXCR4 signal were detected in order to find out the mobilization mechanism of stem cells. Kunming mice were randomly divided into two groups. The mice in treatment group were subjected to subcutaneous injection of G-CSF at a dose of 100 μg/kg and SCF at a dose of 25 μg/kg every day for 5 days, and those in control grou...     

食管鳞形细胞癌及转移性淋巴结组织中CXCL12及其受体CXCR4的表达和临床意义

 目的  探讨CXCL12及其受体CXCR4在食管癌及转移性淋巴结组织中的表达及其与患者临床病理特征及预后的关系。方法  收集2006年于复旦大学附属中山医院行根治性手术的154例胸段食管鳞癌及45例肿瘤转移性淋巴结组织腊块标本,利用免疫组化技术检测肿瘤组织中CXCL12和CXCR4的表达,并分析两者表达水平的相关性。对各指标和患者临床特征进行相关性分析,比较原发肿瘤组织与淋巴结转移性肿瘤组织之间CXCL12和CXCR4表达的差异,并且分析相关因素和患者预后的关系。结果  CXCL12表达水平与患者临床病理学特征无明显相关性(P>0.05);CXCR4表达水平与患者性别、肿瘤浸润深度、区域淋巴结转移、TNM分期具有相关性(P<0.05)。原发肿瘤组织中CXCL12和CXCR4表达水平具有相关性(P<0.01)。肿瘤转移性淋巴结组织中CXCR4表达评分均值明显高于与其配对的原发肿瘤组织(P<0.01)。单因素分析显示CXCR4高表达患者无瘤生存期(disease free survival,DFS)及总生存期(overall survival,OS)明显低于CXCR4低表达患者(P<0.01);CXCL12和CXCR4联合表达阳性的患者,其DFS及OS明显低于联合表达阴性的患者(P<0.01)。多因素分析显示CXCR4高表达及区域性淋巴结转移是患者DFS和OS的独立预后不良因素。结论  CXCL12和CXCR4表达水平与食管癌患者预后密切相关,CXCL12/CXCR4信号轴在食管癌转移中起到重要作用,两者可能通过自分泌机制促进肿瘤转移。     

胆囊癌患者癌组织中趋化因子CXCL12及其受体CXCR4、CXCR7表达及意义

目的研究胆囊癌患者癌组织中趋化因子CXCL12以及其受体CXCR4/CXCR7的表达与意义。方法选取2012年4月至2016年6月在我院行手术切除治疗的67例证实为胆囊癌的标本作为观察组,同时另选取67例正常胆囊组织标本作为对照组。采用免疫组织化学法(SP)检测癌组织中趋化因子CXCL12及其受体CXCR4、CXCR7表 达水平及意义。结果观察组患者CXCL12、CXCR4与CXCR7的表达率明显高于对照组,差异有统计学意义(P<0.05);趋化因子CXCL12及其受体CXCR4、CXCR7在性别、年龄中比较差异无统计学意义(P>0.05),在中低分化中阳性表达率明显高于在高分化的阳性表达率,差异有统计学意义(P<0.05),在有淋巴结转移中的阳性表达率明显高于无淋巴结转移中的阳性表达率,在TNM分期中Ⅲ+Ⅳ期的阳性表达率明显高于Ⅰ+Ⅱ期的阳性表达率(P<0.05);经Pearson相关性分析显示,CXCL12与CXCR4蛋白在胆囊癌中成正相关(r=0.424,P<0.05),CXCL12与CXCR7蛋白在胆囊癌中成正相关(r=0.624,P<0.05),CXCL4与CXCR7蛋白在胆囊癌中无相关 (r=0.164,P>0.05)。结论趋化因子CXCL12及其受体CXCR4、CXCR7在胆囊癌组织中高度表达,而且与TNM分期、淋巴结转移、组织学分级有着密切的相关性,对胆囊癌诊断与预后具有一定的临床价值。     

Study on the Expression Levels of CXCR4, CXCL12, CD44, and CD147 and Their Potential Correlation with Invasive Behaviors of Pituitary Adenomas

Objective To evaluate the factors of CXCR4, CXCL12, CD44, and CD147 as early potential diagnostic biomarkers by determining their expression levels in invasive and non-invasive pituitary adenomas. Methods Fresh pituitary adenoma specimens were collected from 35 pituitary adenoma (21 invasive and 14 non-invasive) patients who underwent surgical treatment in our Neurosurgery Department between January and April of 2009. The expression levels of CXCR4, CXCL12, CD44, and CD147 were evaluated firstly by flow cytometry, fluorescence microscopy in single cell suspensions, and then by immunohistochemical staining of paraffin tissue sections. Results Flow cytometric analyses showed that the percentage of CXCR4-and CXCL12-positive cells from invasive pituitary adenomas (IPA) was significantly higher in the single cell suspensions than that from non-invasive pituitary adenomas (nIPA) (P<0.05). Immunohistochemical staining revealed that CXCR4 and CXCL12 staining index scores of the invasive pituitary adenomas were significantly higher than those of the non-invasive pituitary adenomas (P<0.05). In contrast, neither flow cytometry nor immunohistochemical staining demonstrated significant difference between CD44 and CD147 expression levels, respectively. Conclusion Expression levels of CXCR4 and CXCL12 are correlated with the invasiveness of pituitary adenomas. Therefore, rather than CD44 and CD147, CXCR4 and CXCL12 may potentially serve as biomarkers for early detection of pituitary adenomas.     

趋化因子CXCL12及受体CXCR4在胃癌中的研究进展

趋化因子CXCL12及其受体CXCR4在胃癌生长、侵袭、转移和胃癌新生血管的形成等方面发挥着重要作用。统计学分析表明CX-CR4阳性表达率与胃癌腹膜转移有关(P<0.001);CXCL12/CXCR4可以调节多种肿瘤细胞的增殖,包括乳腺癌、前列腺癌、黑色素瘤以及消化道癌等;它们的过度表达可以增加肿瘤血管和淋巴管生成,促进肿瘤的生长与侵袭转移;还可以趋化血管内皮细胞的聚集,诱导微血管的形成和毛细血管的发生。这些发现都提示着CXCL12及受体CXCR4与胃癌发生、发展和迁徙转移过程中有密切关系。因此,对CXCL12/CXCR4的深入研究将有望使其成为胃癌靶向治疗的新靶点。     

瘦素对早孕绒毛滋养细胞分泌CXCR4及MMP9的影响

目的 研究瘦素对早孕绒毛滋养细胞分泌趋化因子受体4(CXCR4)及金属基质蛋白酶-9 (MMP9) 的调节作用.方法 分离、培养早孕期绒毛滋养细胞,添加不同浓度的瘦素,培养24h后,RT-PCR法检测滋养细胞中CXCR4及MMP9 mRNA表达水平.结果 添加了瘦素的滋养细胞表达CXCR4及MMP9 mRNA的量较空白对照组极显著增加(P＜0.01).结论 瘦素能增强滋养细胞分泌CXCR4及MMP9的能力.瘦素可能在孕早期参与了胎盘形成等病理生理过程.     

依达拉奉联合瑞舒伐他汀治疗心源性脑梗死的疗效及对血清CXCL12、UCH-L1、HC-gp39水平的影响

目的 探究依达拉奉联合瑞舒伐他汀治疗心源性脑梗死的疗效及对血清趋化因子12（CXCL12）、泛素C末端水解酶L1（UCH-L1）、人类软骨糖蛋白-39（HC-gp39）水平的影响。方法 选取2020年3月—2022年4月达州市中心医院收治的90例心源性脑梗死患者作为研究对象,随机分为对照组和观察组,各45例。对照组给予瑞舒伐他汀治疗,观察组给予依达拉奉联合瑞舒伐他汀治疗。比较两组疗效、CXCL12、UCH-L1、HC-gp39、血液流变学指标、血脂水平及美国国立卫生研究院脑卒中量表（NIHSS）评分。结果 观察组总有效率高于对照组（P <0.05）。观察组治疗前后血清CXCL12、UCH-L1、HC-gp39水平的差值高于对照组（P <0.05）。观察组治疗前后全血低切黏度、全血高切黏度及纤维蛋白原水平的差值高于对照组（P <0.05）。观察组治疗前后TC、TG、LDL-C水平的差值高于对照组（P <0.05）。观察组治疗前后NIHSS评分的差值高于对照组（P <0.05）。结论 依达拉奉联合瑞舒伐他汀治疗心源性心肌梗死可有效提高患者临床疗效,改善血液流变学指标、血脂、神经功能及炎症反应。     

Expression of chemokine receptors CCR3, CCR5 and CXCR3 on CD4^＋ T cells in CBA/J×DBA/2 mouse model,selectively induced by IL-4 and IL-10, regulates the embryo resorption rate

Background Chemokines and their receptors have been a research focus in transplantation immunology. Chemokines and their receptors play a role in lymphocyte recruitment and differentiation process. This study aimed to observe whether IL-4 and IL-10 may regulate the expression of chemokine receptors CCR3, CCR5 and CXCR3 on CD4^＋ T cells in CBA/J×DBA/2 mouse model and to explore the role of CCR3, CCR5, CXCR3 in immune tolerance in pregnancy. Methods The mouse model of spontaneous abortion （CBA/J×DBA/2） and the normal pregnant mouse model （CBA/J×BALB/c） were used. CBA/J×DBA/2 mice were injected with IL-4 （CBA/J×DBA/2-IL-4）, IL-4 and IL-10 （CBA/J×DBA/2-IL-4＋IL-10）, or normal saline （CBA/J×DBA/2-NS） as a control. The expression of CCR3, CCR5 and CXCR3 on CD4^＋ T cells from mouse peripheral blood was measured by the double-labelled FCM method, and the embryo resorption rate was also examined. Results The embryo resorption rate in the CBA/J×DBA/2 group without any treatment was significantly higher than that in the CBA/J×BALB/c group （17.9% vs 3.7%, P 〈0.01）. The embryo resorption rate in the CBA/J×DBA/2 group immunized with IL-4 or IL-4 together with IL-10 was significantly decreased, compared with that in the control and NS groups respectively. CCR3 expression on CD4^＋ T cells in the CBA/J×DBA/2 group without any treatment was significantly lower than that in the CBA/J×BALB/c group （0.3738±0.3575 vs 1.2190±0.2772, P 〈0.01）; both CCR5 （3.0900±1.5603 vs 1.2390±0.6361, P〈0.01） and CXCR3 （2.4715±0.9074 vs 0.9200±0.5585, P 〈0.01） expressions on CD4^＋ T cells of the CBA/J×DBA/2 group without any treatment were significantly higher than those of the CBA/J×BALB/c group. Significant up-regulation of CCR3 and down-regulation of CXCR3 were found in the CBA/J×DBA/2 group treated with IL-4 （CCR3： 2.0360±0.6944, CXCR3： 1.3510±0.5263, P〈0.01） or IL-4 and IL-10 （CCR3： 1.8160±1.0947, CXCR3：1.0940±0.7168, P〈0.01）. Because of the CCR5, IL-4 and IL-10 （1.9400±0.8504 vs 3.0900±1.5603, P 〈0.05）, but IL-4 alone （2.5310±1.3595 vs 3.0900±1.5603, P 〉0.05） treatment significantly decreased the expression of CCR5 in CBA/J×DBA/2. Conclusions The abnormal expression of CCR3, CCR5 and CXCR3 on CD4^＋ T cells may play an important role in the pathogenesis of spontaneous abortion. The pregnancy immune tolerance may be induced through selective induction of CCR3, CCR5 and CXCR3 expressions by IL-4 together with IL-10.     

CXCL12/CXCR4大肠癌细胞放射敏感度影响的实验研究

目的 研究CXCL12/CXCR4对大肠癌细胞放射敏感度的影响。方法 HCT116细胞系进行培养和分组,对其进行外源性CXCL12、AMD3100及CXCL12+siSurvivin处理在放射治疗下对其细胞存活分数、LDH、caspase-3,caspase-9进行检测。结果 外源性CXCL12处理减弱了放射诱导的细胞存活分数下降和细胞死亡的增加,抑制CXCR4促使大肠癌细胞对放射更敏感。CXCL12/CXCR4对细胞存活起关键作用,通过外源性CXCL12处理可逆转放射促使的Bax的表达和caspase-3和caspase-9的活性。在放射条件下抑制CXCR4可使细胞凋亡增强。此外,外源性CXCL12处理增加Survivin的表达,CXCL12对放射诱导的细胞凋亡的抑制作用是由Survivin的表达而实现。结论 CXCL12/CXCR4通过Survivin的表达在放射中保护结肠癌细胞,这意味着一个放射在大肠癌治疗应用的重要潜在机制。     

不同分子分型乳腺癌组织中趋化因子 CXCL12 及其受体 CXCR4 和 CXCR7 的表达及临床意义

目的：探讨趋化因子CXCL12及其受体CXCR4和CXCR7在不同分子分型乳腺癌组织中的表达及临床意 义。方法：应用实时定量PCR检查80例不同分子分型乳腺癌组织中的趋化因子CXCL12 mRNA及其受体CXCR4和 CXCR7 mRNA的表达,采用免疫组织化学技术检测160例不同分子分型乳腺癌细胞组织中趋化因子CXCL12蛋白及其 受体CXCR4和CXCR7蛋白的表达,并分析它们在不同分子分型乳腺癌中的表达差异。结果：CXCL12 mRNA及其受 体CXCR4和CXCR7 mRNA在Luminal A和Luminal B型中表达无差异,在HER-2过表达型和三阴性乳腺癌(triple negative breast cancer,TNBC)两个类型之间的表达也无差异,但三者在HER-2过表达型和TNBC中的表达明显高于Luminal A和 Luminal B型(均P<0.05);CXCL12蛋白、CXCR4蛋白和CXCR7蛋白在HER-2过表达型和TNBC中的阳性表达率均明显高 于Luminal A和Luminal B型(均P<0.05),但在Luminal A和Luminal B之间及HER-2过表达型和TNBC之间的表达无差异。 结 论：趋化因子CXCL12及其受体CXCR4和CXCR7在HER-2过表达型乳腺癌和TNBC组织中高表达,可能与该类型乳腺 癌预后较差有关,抑制其表达可为该类乳腺癌的治疗提供重要途径。     

神经干细胞移植对脑缺血再灌注损伤大鼠CXC趋化因子1和2及其趋化因子受体2表达的影响

目的探讨神经干细胞(NSCs)移植对大鼠脑缺血再灌注损伤梗死区CXC趋化因子1(CXCL1)和CXC趋化因子2(CXCL2)及CXC趋化因子受体2(CXCR2)表达的影响。方法线栓法制作大鼠大脑中动脉缺血2 h再灌注模型,实验动物随机分为假手术组、模型组和NSCs组。NSCs组尾静脉注射PKH26标志的NSCs细胞悬液,缺血72 h后行神经功能损害评分(NSS),2,3,5-氯化三苯基四氮唑(TTC)法检测脑梗死体积,苏木精-伊红(HE)染色观察梗死区病理变化,Western blot和实时荧光定量聚合酶链反应(PCR)检测梗死区CXCL1、CXCL2、CXCR2蛋白和mRNA表达。结果脑缺血后72 h,模型组和NSCs组NSS评分和脑梗死体积高于假手术组(P<0.05);NSCs组NSS评分和脑梗死体积低于模型组(P<0.05)。HE染色可见模型组梗死区大量炎性细胞浸润,而NSCs组梗死区炎性细胞浸润较少;NSCs组在梗死区有红色荧光信号表达,而假手术组和模型组未发现红色荧光信号。模型组CXCL1、CXCL2、CX-CR2蛋白和mRNA相对表达高于假手术组(P<0.05);NSCs组CXCL1、CXCL2、CXCR2蛋白和mRNA相对表达低于模型组(P<0.05)。结论 NSCs移植具有促进脑缺血损伤神经功能恢复和减少脑梗死体积的作用,其机制可能与其下调炎症趋化因子CXCL1、CXCL2及其受体CXCR2表达、进而抑制炎症反应有关。     

CXCL12/CXCR4生物学轴与膀胱肿瘤关系的研究进展

趋化因子是促炎症趋化细胞因子类家族成员之一,它在许多生理和病理过程中有重要作用。研究发现趋化因子CXCL12和受体CXCR4广泛表达于组织和器官,与膀胱肿瘤细胞的黏附、侵袭、增殖和生存有关。通过阐明CXCL12/CXCR4生物学轴和膀胱肿瘤的关系,以便寻找有利于疾病治疗的新途径。     

CXCL12-CXCR4轴促进胶质母细胞瘤前神经间质转化

［摘要］目的: 探讨CXC趋化因子配体12-CXC趋化因子受体4(CXC chemokine ligand 12 CXC chemokine receptor 4,CXCL12-CXCR4)轴对脑胶质母细胞瘤前神经间质转化的作用。方法: 分析TCGA GBM基因数据库中CXCR4 mRNA在不同胶质瘤分子分型肿瘤组织中的水平差异及其对肿瘤患者生存率的影响;人胶质瘤LN428、U87MG细胞经不同浓度CXCL12 (0、20、40、60、80、100 ng/mL)及20 μmol/L普乐沙福(选择性CXCR4拮抗剂)预处理48 h,免疫印迹实验检测细胞内OLIG2、E-钙黏蛋白、YKL-40、N钙-黏蛋白和波形蛋白表达水平;Transwell实验检测细胞迁移和侵袭能力,CCK8法和克隆形成实验检测肿瘤细胞增殖能力。结果： TCGA GBM数据库分析结果显示,与健康者相比,胶质瘤患者CXCR4 mRNA表达显著增高,且与患者生存率呈负相关;间质型胶质母细胞瘤组织标本中CXCR4 mRNA水平显著高于前神经型胶质母细胞瘤(P均＜0.05)。与对照组相比,CXCL12组细胞间质型相关蛋白YKL-40、N-钙黏蛋白、波形蛋白表达水平显著升高,而前神经型相关蛋白OLIG2、E-钙黏蛋白表达水平显著降低,人胶质瘤LN428、U87MG细胞迁移和侵袭能力、增殖能力显著增强(P均＜0.05);给予普乐沙福处理后,与CXCL12组相比,人胶质瘤LN428、U87MG细胞迁移和侵袭能力、增殖能力显著降低,且间质型相关指标蛋白表达显著降低,前神经型相关指标蛋白表达显著升高(P均＜0.05)。结论： CXCL12-CXCR4轴具有促进胶质母细胞瘤前神经间质转化,及迁移和侵袭、增殖的作用。