CXCR4/CXCL12轴与白血病复发

趋化因子受体CXCR4与其特异性配体CXCL12结合,启动下游信号通路形成CXCR4/CXCL12生物轴,在造血干细胞的归巢、再植以及维持正常造血和造血微环境的稳定过程中发挥重要作用.CXCR4/CXCL12轴同时也可促进白血病细胞存活、增殖、转移及耐药,与白血病髓内外复发关系密切.CXCR4的表达水平可作为判断白血病...     

趋化因子CXCL12及其受体CXCR4与乳腺癌

 趋化因子CXCL12及其受体CXCR4在乳腺癌发生发展的多个过程中受到多种因素调控并表达,并且多项研究证实CXCL12及CXCR4不但有助于判断乳腺癌患者的预后,而且针对CXCR4的治疗更为乳腺癌患者提供了新的联合治疗方案,给患者更为理想的治疗。     

CXCL12／CXCR4生物轴与消化系统恶性肿瘤

消化系统恶性肿瘤发病率及死亡率均远远高于其它系统恶性肿瘤，对消化系统恶性肿瘤的预防和治疗研究亟待进一步深入。细胞移位是相当多病理生理过程的基本步骤，包括恶性肿瘤细胞的生长及转移。越来越多地研究认为肿瘤细胞通过化学趋化因子及其相应受体介导的化学趋化机制调节其生长和转移，趋化因子在恶性肿瘤中具有多方面作用，归纳为：①诱导白细胞向肿瘤组织浸润，调节免疫功能，尤其是肿瘤相关的巨噬细胞、T细胞和树突状细胞；②引导肿瘤细胞迁移到特定部位；③调节血管生成；④直接活化肿瘤细胞，调控其恶性肿瘤相关的功能表现。近年研究发现，趋化因子CXCL12及其受体CXCR4构成的生物轴在包括乳腺癌在内的多种实体瘤的生长、转移中发挥重要作用。CXCL12／CXCR4生物轴与消化系统恶性肿瘤之间关系密切，CXCL12的刺激促进CXCR4的表达及消化系统恶性肿瘤的转移；CXCR4持续高表达预示肿瘤的复发及预后不良；在CXCL12作用下，肿瘤细胞黏附／迁移和增殖能力亦显著增强，这些效应被CXCR4的抗体所拮抗。未来研究寄希望通过拮抗影响肿瘤转移的CXCL12与CXCR4等趋化因子及其受体的作用来阻断消化系统恶性肿瘤转移，将可能会成为一种新的治疗消化系统恶性肿瘤的有效途径。     

CXCL12-CXCR4/CXCR7生物轴在肝癌中的研究进展北大核心CSCD

肝细胞癌(hepatocellular carcinoma,HCC)是世界上发病率和死亡率最高的恶性肿瘤之一。研究发现,CXCL12-CXCR4/CXCR7生物轴可通过自分泌和(或)旁分泌机制调控HCC细胞的生长、血管生成、免疫逃逸及侵袭转移等关键步骤,有可能成为HCC防治新靶点和预后评价新标志。本文就当前国内外研究CXCL12-CXCR4/CXCR7生物轴在肝癌发生和发展过程中的作用以及与此相关的信号转导途径进行综述。     

CXCL12/CXCR4信号通路对肿瘤的作用及机制的研究进展

随着环境污染的加剧和老龄社会的来临,肿瘤的发病率不断升高,对肿瘤诊治的研究有十分重要的意义.目前,对肿瘤的诊治的研究也进入了分子水平,CXCL12/CXCR4信号通路对多种肿瘤的生物学行为有重要的影响,对其进行研究也是近年来的热点.本文将对CXCL12/CXCR4信号通路对肿瘤的作用及机制进行综述.     

CXCL12／CXCR4生物学轴诱导前列腺癌骨转移的作用机制研究进展

研究发现趋化因子CXCL12（Stromal—derived factor-1,SDF-1）和受体CXCR4[chemokine（C—X—Cmotif）receptor4]广泛表达于组织和器官上,相关的研究发现其与前列腺癌细胞的黏附、侵袭、增殖和生存有关,并认为其在前列腺癌骨转移的发生中发挥重要作用。通过阐明CXCL12／CXCR4生物学轴和前列腺癌骨转移之间的关系,从而寻找有助于疾病治疗的新途径。     

miR-139通过下调CXCR4/CXCL12生物轴抑制乳腺癌定向转移的分子机制研究

摘 要：［目的］ 检测miR-139在乳腺癌细胞系及组织中的表达,验证CXCR4是否为miR-139直接调控的靶基因,并探究miR-139是否可通过靶向抑制CXCR4/CXCL12生物轴从而抑制乳腺癌细胞的定向转移。［方法］ 实时荧光定量聚合酶链式反应（qRT-PCR）用于检测miR-139在34对转移性乳腺癌患者的原发灶、转移灶及癌旁组织中,在5株乳腺癌细胞系及1株正常乳腺上皮细胞中的表达。将包含miR-139的重组慢病毒质粒及其阴性对照空载体质粒vector分别以病毒/细胞数量=20的比例感染MDA-MB-231细胞,经2.0μg/ml嘌呤霉素筛选,成功构建稳定表达miR-139或vector的MDA-MB-231细胞,将MDA-MB-231vector和MDA-MB-231miR-139细胞分别经尾静脉注射到BALB/c裸鼠中,构建乳腺癌裸鼠转移模型,观察过表达miR-139对裸鼠体内转移能力的影响。TargetScan软件用于预测miR-139的靶基因,根据预测结果,将野生型或突变型CXCR4的3’-UTR区域克隆到荧光素酶报告基因的下游（CXCR4-wt或CXCR4-mut）并分别与miR-139 mimics或scramble共转染后检测荧光素酶的活性。qRT-PCR和Western blot分别检测转染miR-139 mimics和scramble后CXCR4、CXCL12的mRNA和蛋白表达。［结果］ miR-139在转移性乳腺癌原发灶和转移灶中的表达均低于癌旁组织,且转移灶中表达最低,miR-139在乳腺癌细胞系中的表达水平显著低于正常乳腺上皮细胞MCF-10A,且MDA-MB-231细胞中最低。尾静脉注射MDA-MB-231miR-139的裸鼠肺转移灶的个数均显著低于MDA-MB-231vector细胞。TargetScan软件预测CXCR4为miR-139直接调控的靶基因,CXCR4-wt+miR-139共转染组比CXCR4-wt+scramble共转染组的荧光素酶活性强度显著降低,CXCR4-mut+miR-139共转染组和CXCR4-wt+scramble共转染组间荧光素酶活性强度无显著性差异。转染miR-139后,CXCR4和CXCL12的mRNA和蛋白表达水平均显著下调,CXCR4/CXCL12生物轴下游的p-AKT和p-ERK蛋白表达水平也显著下调。［结论］ miR-139可通过靶向调控CXCR4/CXCL12生物轴而抑制乳腺癌细胞MDA-MB-231定向转移。     

结直肠癌CXCL12-CXCR4/CXCR7轴作用机制研究进展

目的 探讨趋化因子CXCL12及其受体与结直肠癌的关系,以总结最新研究进展。方法 应用PubMed、Web of Science数据库和中国期刊全文数据库(CNKI)检索系统,以“结直肠癌、CXCL12、CXCR4、CXCR7、靶向治疗和趋化因子等”为中文关键词,以“colorectal cancer、CXCL12、CXCR4、CXCR7、targeted therapy、chemokines”等为英文关键词,检索2010-01-01-2022-03-31的相关文献,共检索到中文文献76篇,英文文献256篇。纳入标准：(1)结直肠癌发生时CXCL12、CXCR4和CXCR7表达水平变化;(2)CXCL12-CXCR4/CXCR7轴对结直肠癌发生发展的影响及作用机制;(3)靶向干预CXCL12-CXCR4/CXCR7轴对结直肠癌的影响及相关临床研究。排除标准：结直肠癌与非CXCL12/CXCR4或CXCL12/CXCR7信号轴。最终共纳入分析文献56篇,中文16篇,英文40篇。结果 CXCL12及其受体在结直肠癌组织及常见转移部位表达显著升高,相关分子信号可通过CXCL12-CXCR4/...     

CXCL12- CXCR4在乳腺浸润性导管癌中的表达及临床意义

目的：研究乳腺浸润性导管癌中趋化因子 CXCL12及其对应的特异趋化因子受体 CXCR4的表达,分析其与浸润性导管癌临床病理学特征的关系。方法：用免疫组化法研究200例乳腺浸润性导管癌中 CX-CL12、CXCR4的表达情况,并探讨二者单一表达或共表达与临床病理因素的相关性。结果：CXCL12在40%（80/200）浸润性乳腺癌中阳性表达,其与 TNM 分期和肿瘤大小相关（P <0.05）;CXCR4在48%（96/200）浸润性乳腺癌中阳性表达,其表达与浸润性乳腺癌的 TNM 分期相关（P <0.05）。CXCL12与 CXCR4共表达于29%（58/200）的浸润性乳腺癌,二者的共表达与 TNM 分期和淋巴结转移情况相关（ P <0.01）。结论：CX-CL12与 CXCR4共表达很可能是协同乳腺浸润性导管癌进展及淋巴结转移的重要因素,检测 CXCL12与 CX-CR4共表达比检测 CXCL12或 CXCR4单一分子标记更有意义。     

CXCL12，CXCR4及CXCR7表达检测对乳腺癌患者疾病预后意义探讨

目的：探讨乳腺癌患者肿瘤组织中CXCL12,CXCR4和CXCR7 mRNA表达情况在肿瘤转移和疾病预后中的价值。方法采用定量PCR方法检测115例乳腺癌,临近正常组织及乳腺癌肿瘤转移患者颈部淋巴结样本中CXCL12,CXCR4和CXCR7 mRNA表达情况。随访资料采用Kaplan-Meier生存分析,对影响生存质量的因素进行多重变量Cox回归分析。结果与正常组织相比,乳腺癌组织中CXCR4和CXCR7表达明显增加,差异均有统计学意义（P﹤0.001）,两种组织中CXCL12的表达差异无统计学意义（P﹥0.05）;CXCL12在肿瘤原发部位和淋巴结转移部位的表达差异有统计学意义（P﹤0.05）,转移瘤的CXCR4和CXCR7表达均增加（P﹤0.05）。Kaplan-Meier生存分析结果表明,与CXCR4和CXCR7低表达患者相比,高表达患者的总生存率较低（P﹤0.05）。Cox回归模型显示,CXCL12、CXCR4和CXCR7表达均为影响乳腺癌患者生存情况的独立因素。结论本研究结果表明CXCL12、CXCR4和CXCR7 mRNA表达在乳腺癌患者肿瘤发展和转移中发挥重要作用,可以作为乳腺癌患者疾病预后的生物标志物。     

趋化因子受体CXCR4在甲状腺癌中的表达

目的探讨趋化因子受体CXCR4在甲状腺癌中的表达及临床意义,为临床治疗甲状腺癌寻求新的治疗靶点提供依据。方法采用免疫组化SP染色法检测甲状腺癌、结节性甲状腺肿、甲状腺腺瘤及正常甲状腺组织中CXCR4表达差异,以及CXCR4在甲状腺癌中的表达与患者肿瘤病理类型、淋巴结转移状态、年龄及性别的关系。结果CXCR4在甲状腺癌组织中高表达,与结节性甲状腺肿、甲状腺腺瘤及正常甲状腺组织中表达差异有统计学意义,而且与患者淋巴结转移状态、病理类型密切相关,与患者年龄、性别无关。结论CXCR4在甲状腺癌的发生发展中可能起到重要作用,CXCR4在甲状腺癌中高表达,与患者淋巴结转移状态、病理类型密切相关,可作为甲状腺癌患者预后的指标,本研究为临床寻找新的甲状腺癌治疗靶点提供了重要依据。     

Expression of the CXCL12/SDF-1 Chemokine Receptor CXCR7 in Human Brain Tumours

Purpose: Receptor 7 (CXCR7) has recently been characterized as a novel receptor for CXCL12/SDF-1(stromal cell derived factor-1). Given the demonstrated importance of CXCL12/SDF-1 in angiogenesis and tumourmetastasis, we hypothesized that CXCR7 may also play a role in tumour pathogenesis. Located in the limitedspace of the intracranial cavity, any brain tumours can be inherently serious and life-threatening. However, theexpression of CXCR7 in pituitary adenoma, neurilemmoma or hemangioblastoma remains to be elucidated.Therefore, we aimed to determine the potential contribution of CXCR7 in the development of brain tumours.Methods: In this study we examined and quantified the mRNA expression of CXCR7 in four different humanbrain tumours - 27 patients with neurilemmoma (8 patients), pituitary adenoma (7 patients), hemangioblastoma(6 patients), or meningioma (6 patients) undergoing surgical resection in the West China Hospital of SichuanUniversity. There were 15 females and 12 males aged from 28 to 70 years old. Total RNA was isolated and mRNAwas measured by quantitative real-time RT-PCR. One-way analysis of variance (ANOVA) was performed usingSPSS 11.0 statistical software to compare the mRNA levels of CXCR7 among four groups. Results: We foundthat CXCR7 mRNA was detected in all tumour samples. Quantitative results showed that the levels of CXCR7mRNA in brain tissues from patients with neurilemmoma or meningioma were significantly higher than thosewith pituitary adenoma or hemangioblastoma. Conclusions: The results suggest that the CXCR7 may play arole in progression, metastasis and angiogenesis of brain tumours.     

Chemokine axes CXCL12/CXCR4 and CXCL16/CXCR6 correlate with lymph node metastasis in epithelial ovarian carcinoma

Recent evidence suggests that the chemokine axis of CXC chemokine ligand-12 and its receptor CXC chemokine receptor-4(CXCL12/CXCR4) is highly expressed in gynecological tumors and the axis of CXC chemokine ligand-16 and CXC chemokine receptor-6(CXCL16/CXCR6) is overexpressed in inflammation-associated tumors.This study aimed to determine the relationship between CXCL12/CXCR4,CXCL16/CXCR6 and ovarian carcinoma's clinicopathologic features and prognosis.Accordingly,the expression of these proteins in ovarian ...     

雌激素受体和孕激素受体与乳腺癌关系的研究进展

乳腺癌是女性最常见的恶性肿瘤,雌、孕激素受体在乳腺癌的发病中起着非常重要的作用。全文就国内外关于雌、孕激素受体与乳腺癌关系的研究进展作一综述。     

The Role of Chemokine Receptor CXCR7 in Lung Cancer

OBJECTIVE To investigate whether CXCL12 and its receptor,CXCR7, play a role in lung cancer invasion and metastasis.METHODS Western blot and immunocytochemistry were used to detect CXCR7 protein expression in 8 lung cancer cell lines, EKVX, HOP62, HOP92, NCI-H23, NCI-H226, NCIH322M,NCI-H446, and A549, and cell migration experiment was conducted to observe mobility of the lung cancer cells. The concentration of intracellular calcium in cytoplasm was measured under the fluorescence microscopy.RESULTS CXCR7 protein was positively expressed in the 8 lung cancer cell lines EKVX, HOP62, HOP92, NCI-H23, NCI-H226, NCIH322M,NCI-H446, and A549. Following CXCL12 stimulation,obvious pseudopodia of lung cancer cells was observed under the microscope. The cell migration experiment showed that after incubation with CXCL12, the number of EKVX cells, which passed through the polycarbonate microporous filter membranes increased to a great extent. This phenomenon can be reversed by CXCR7-siRNA. After CXCL12 incubation, the intracellular Ca2+level in the EKVX cells was increased to a great extent. CONCLUSION Chemokine CXCL12 facilitates the migration of lung cancer cells by changing the concentration of intracellular Ca2+. The CXCL12-CXCR7 axis may play an important role in lung cancer invasion and metastasis. It could be a potential target for lung cancer therapy and an effective way to prevent recurrence and metastasis of lung cancer.     

趋化因子受体CXCR4在食管癌中的表达及临床意义

[目的]探讨CXCR4在食管癌中的表达及意义。[方法]应用免疫组织化学方法检测82例食管癌组织、20例癌旁食管组织中CXCR4的表达。[结果]CXCR4在癌旁食管组织无表达,在82例食管癌组织中的阳性表达率为64.6%(53/82)。CXCR4表达与食管癌患者的年龄、性别无关,而与分化程度、TNM分期、浸润深度、组织学类型和淋巴结转移有关。[结论]CXCR4在食管癌中高表达,CXCR4可能是促进食管癌侵袭和转移的一个重要分子。     

趋化因子CXCL12与肿瘤

趋化因子CXCL12又称基质细胞衍生因子-1,是一个定位于10号染色体由基质细胞产生的CXC类趋化因子.目前认为CXCR4和CXCR7是CXCL12的两个受体.多项研究发现CXCL12在肿瘤细胞增殖、转移及血管生成过程中发挥重要作用.因此,CXCL12有望成为肿瘤基因治疗的新靶点.     

CXCL12/CXCR4 and breast cancer

CXCL12 and its receptor CXCR4 can express in breast cancer, and are regulated by several factors in the genesis and development of breast cancer. Lots of researches have proved that CXCL12 and CXCR4 can be used as new independent prognostic makers of breast cancer. Treatment targeted for CXCR4 can be seen as a new kind of combination therapy, which may provides patients a more ideal treatment.     

Chemokine CXCL12 in cancer

CXCL12, also known as stromal cell-derived factor 1, is a member of the CXC family, which locates on the 10th chromosome and produces by the stromal cells. It is known that CXCR4 and CXCR7 are the two receptors of chemokine CXCL12. Many studies show that the chemokine CXCL12 plays an important role in cancer progression, including proliferation, metastasis and angiogenesis. Therefore, the chemokine CXCL12 is expected to become a novel target for the gene therapy of cancer.