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 ...     

宫颈腺癌细胞CXCR4/CXCL12过表达与淋巴结转移和慢性炎症的关系

背景与目的:CXCL12是一种炎症趋化因子,CXCR4是其特异性受体.有文献报道CXCR4参与多种恶性肿瘤的转移过程.但CXCR4/CXCL12在宫颈腺癌细胞中表达的意义鲜见报道.本研究探讨CXCR4/CXCL12在宫颈腺癌细胞中过表达与淋巴结转移及宫颈慢性炎症程度的相关性.方法:收集35例行子宫颈癌根治术的Ⅰ B1～ⅡB期宫颈腺癌标本,其中有淋巴结转移组8例,无淋巴结转移组27例.组织切片行CXCR4和CXCL12免疫组化染色及HE染色,90%以上肿瘤细胞强着色定义为过表达.采用Fisher's精确概率检验法、卡方检验及Pearson相关检验分析结果.结果:35例均有不同数量肿瘤细胞表达CXCR4.有淋巴结转移组CXCR4过表达率(62.50%,5/8)高于无淋巴结转移组(22.00%,6/27),P＜0.05.临床Ⅰ B期有淋巴结转移组CXCR4过表达率(33.33%,1/3)高于无淋巴结转移组(26.01%,6/23),但P＞0.05;临床ⅡB期,有淋巴结转移组CXCR4过表达率高于无淋巴结转移组(80.00%,4/5 vs.0.00%,0/4),P＜0.05.CXCR4过表达预测淋巴结转移的阳性预测值为45.45%,阴性预测值为87.50%.35例中33例有数量不等的肿瘤细胞表达CXCL12.无论有淋巴结转移组或无淋巴结转移组,临床Ⅱ期病例CXCL12过表达率均明显高于I B期(0.00% vs.80.00%,21.73% vs.75.00%),P＜O.05.23例临床Ⅰ B期无淋巴结转移组,CXCR4过表达率与CXCL12过表达率呈正相关(P＜0.05):但在Ⅰ B期有淋巴结转移组(3例)及ⅡB期(9例)病例组,两者间无相关性.35例病例均伴有不同程度慢性炎症,炎性浸润主要为淋巴细胞.CXCL12过表达率与宫颈慢性炎症浸润程度无相关性,P＞0.05.结论:宫颈腺癌细胞CXCR4过表达提示具有较高淋巴结转移潜能.随着肿瘤进展,CXCL12过表达率也随之升高.宫颈腺癌中慢性炎症细胞可能由其它趋化因子吸引所致,而非CXCL12.     

CXCR7/CXCL12与乳腺癌淋巴结转移的关系

目的探讨CXCR7/CXCL12在乳腺癌淋巴结转移中的作用。方法应用Western blot法,检测乳腺癌组织中CXCR7/CXCL12的表达情况。结果乳腺癌组织中CXCR7/CXCL12表达水平明显高于正常乳腺组织(P<0.05);48例淋巴结转移癌组织中36例CXCR7/CXCL12蛋白表达水平高于原发癌组织;CXCR7/CXCL12表达水平与肿瘤淋巴结转移有关(P<0.05)。结论 CXCR7/CXCL12在乳腺癌及其淋巴结转移癌组织中均呈高表达,CXCR7/CXCL12可能在乳腺癌淋巴结转移过程中起重要作用。     

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和CXCR4在食管鳞癌组织中的表达及其与预后的关系

背景与目的：新近研究显示CXCL12／CXCR4在多种肿瘤组织中有表达,并与肿瘤细胞的增殖、侵袭特性相关;本研究旨在检测CXCL12及其受体CXCR4在食管鳞癌中的表达,研究两者对食管癌预后的影响及其与临床及病理因素之间的关系。方法：收集食管癌术后标本186例及正常食管上皮组织20例（对照组）,应用免疫组化法检测食管癌组织中CXCR4与CXCL12的表达。结果：186例食管癌组织中CXCR4的表达率为67．2％,CXCL12的表达率为63．4％,20例正常食管上皮组织中无CXCR4及CXC112蛋白表达。多因素分析：PTNM分期及CXCR4的表达是影响食管癌根治术后患者预后的独立因素（P〈0．05）：CXCL12阳性组与阴性组5年生存率分别为18．8％和21．0％,差异无统计学意义（P〉0．05）。CXCR4阳性组与阴性组5年生存率分别为2．2％和28．5％。差异有统计学意义（P〈0．05）;有淋巴结转移组及病理分期T3期组CXCR4表达率较无淋巴结转移组及病理分期T1-2组高（P〈0．05）,食管癌组织中CXCR4的表达与CXCL12的表达之间无相关性。结论：CXCL12和CXCR4在食管癌组织中均有较高的表达,CXCR4的表达水平与食管肿瘤的发展及预后有一定的关系。     

Adenosine upregulates CXCR4 and enhances the proliferative and migratory responses of human carcinoma cells to CXCL12/SDF-1alpha

The level of expression of the chemokine receptor CXCR4 has been shown to play a crucial role in determining the ability of cancer cells to metastasize from the primary tumor and become established in tissue sites that are rich in the CXCR4 ligand CXCL12/SDF-1alpha. High CXCR4 expression on cancer cells is associated with an increased risk of recurrence and poorer overall survival. We propose that local tissue mediators within the primary tumor or at secondary sites may modulate the level of CXCR4 expression and, therefore, potentially affect the ability of the cancer cells to metastasize. The purine nucleoside adenine-9-beta-D-ribofuranoside (adenosine) is generated at high concentrations within the extracellular fluid of solid tumors because of their hypoxia. We show here that adenosine acts through A(2A) and A(2B) adenosine receptors on human colorectal carcinoma cells to upregulate CXCR4 mRNA expression up to 10-fold and selectively increases cell-surface CXCR4 protein up to 3-fold. This increase in cell-surface CXCR4 enables the carcinoma cells to migrate toward CXCL12, and enhances their proliferation in response to CXCL12. Adenosine may therefore be one of the factors within the tumor microenvironment that facilitates tumor dissemination, by upregulating CXCR4 on certain cancer cells and enhancing cellular responses to CXCL12.     

Expression of CXCL12 and its receptor CXCR4 correlates with lymph node metastasis in submucosal esophageal cancer

BACKGROUND AND OBJECTIVES: The chemokine CXCL12 and its receptor CXCR4 are involved in cell migration, proliferation, and angiogenesis, and promote organ-specific localization of distant metastases in various carcinomas. We examined their expression and microvessel density (MVD) in submucosal esophageal squamous cell carcinoma (ESCC) and analyzed their connection to clinicopathological findings including lymph node micrometastasis (LMM). METHODS: Eighty-six patients with submucosal ESCC underwent curative resection from 1985 to 2002. Immunohistochemical staining of CXCL12, CXCR4, and CD34 was performed with primary tumors, and staining of cytokeratin was performed with dissected lymph nodes. MVD was calculated from CD34 expression, and LMM detected by cytokeratin staining. RESULTS: Expression of CXCL12, but not CXCR4, correlated with lymph node metastasis. There was no significant correlation between the expression of CXCL12 and/or CXCR4 and MVD. LMM was detected in 8 cases and 14 lymph nodes. CXCL12 expression and high MVD were found in tumors with lymph node metastasis including LMM. Furthermore, in the CXCR4-positive tumors, positive CXCL12 expression was more significantly correlated with lymph node metastasis and/or LMM than negative CXCL12 expression. CONCLUSIONS: Evaluation of CXCL12 and CXCR4 expression should assist detection of lymph node metastasis including LMM in submucosal ESCC.     

CXCL12及受体CXCR4在卵巢上皮性癌中的表达及其临床意义

目的:探讨趋化因子CXCL12及其受体CXCR4在卵巢上皮性癌组织中的表达及与临床病理特征和预后的关系。方法:采用免疫组织化学SP法检测6例正常卵巢表面上皮、44例卵巢上皮性癌原发灶和30例相应大网膜转移灶组织中的CXCL12和CXCR4蛋白表达。结果:正常卵巢表面上皮无CXCL12和CXCR4蛋白表达;卵巢上皮性癌原发灶的CXCL12和CXCR4表达阳性率分别为91%和59%。CXCL12表达强度与术中腹水量有显著相关性(P=0.014)。难治复发组的CXCR4阳性率(81%)显著高于无复发组(28%,P<0.001)。单因素分析显示:CXCR4阳性表达的患者中位数肿瘤无进展生存时间和总生存时间(15个月、27个月)明显短于CXCR4阴性表达者(>21个月、>32个月,分别为P<0.001和P=0.017)。多因素分析显示:CXCR4表达和残余灶大小是影响卵巢上皮性癌患者的肿瘤无进展生存时间和总生存时间的独立预后因素。结论:CXCR4在卵巢上皮性癌中的表达阳性率较高,是影响其预后的独立指标之一。     

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。     

Targeting the CXCL12/CXCR4 pathway and myeloid cells to improve radiation treatment of locally advanced cervical cancer

Cervical cancer is the fourth most commonly diagnosed cancer and the fourth leading cause of cancer death in women worldwide. Approximately half of cervical cancer patients present with locally advanced disease, for which surgery is not an option. These cases are nonetheless potentially curable with radiotherapy and cisplatin chemotherapy. Unfortunately, some tumours are resistant to treatment, and lymph node and distant recurrences are major problems in patients with advanced disease at diagnosis. New targeted treatments that can overcome treatment resistance and reduce metastases are urgently needed. The CXCL12/CXCR4 chemokine pathway is ubiquitously expressed in many normal tissues and cancers, including cervical cancer. Emerging evidence indicates that it plays a central role in cervical cancer pathogenesis, malignant progression, the development of metastases and radiation treatment response. Pre‐clinical studies of standard‐of‐care fractionated radiotherapy and concurrent weekly cisplatin plus the CXCR4 inhibitor Plerixafor (AMD3100) in patient‐derived orthotopic cervical cancer xenografts have shown improved primary tumour response and reduced lymph node metastases with no increase in early or late side effects. These studies have pointed the way forward to future clinical trials of radiotherapy/cisplatin plus Plerixafor or other newly emerging CXCL12 or CXCR4 inhibitors in women with cervical cancer.     

结直肠癌中CXCR5、CXCL13、MMP-12和MMP-13的表达及意义

目的 观察结直肠癌组织中趋化因子CXCR5及其配体CXCL13以及MMP-12、MMP-13的表达,探讨其与临床病理特征、预后的关系。方法 应用免疫组织化学SP法检测236例结直肠癌及其切缘正常肠黏膜组织以及62例结直肠腺瘤组织中CXCR5、CXCL13、MMP-12和MMP-13蛋白表达。结果 （1）CXCR5、CXCL13、MMP-12、MMP-13在结直肠癌组织中的表达率为43.6%,41.5%、83.5%和80.5%均高于在切缘正常肠黏膜组织中的表达率（4.2% 、5.5%、11.9%和13.1%）及在结直肠腺瘤组织中的表达率（24.2%、17.7%、69.4%和64.5%）（P均<0.05）。（2）CXCR5、CXCL13、MMP-12、MMP-13蛋白表达与淋巴结转移、远处转移、肿瘤分期及复发呈正相关(P<0.05)。CXCL13蛋白表达与组织分化程度呈正相关(P<0.05)。（3）CXCR5与CXCL13蛋白表达呈正相关(P<0.05)。CXCR5、CXCL13蛋白表达分别与MMP-12和MMP-13呈正相关(P<0.05)。结论 CXCR5、CXCL13、MMP-12、MMP-13的表达促进结直肠癌的发生、发展以及转移、复发, 可作为预测结直肠癌转移和复发的有价值指标。     

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。     

The biological role of the CXCL12/CXCR4 axis in esophageal squamous cell carcinoma

Esophageal cancer is the eighth most common malignant tumor and the sixth leading cause of cancer-related death worldwide. Esophageal squamous cell carcinoma (ESCC) is the main histological type of esophageal cancer, and accounts for 90% of all cancer cases. Despite the progress made in surgery, chemotherapy, and radiotherapy, the mortality rate from esophageal cancer remains high, and the overall 5-year survival rate is less than 20%, even in developed countries. The C-X-C motif chemokine ligand 12 (CXCL12) is a member of the CXC chemokine subgroup, which is widely expressed in a variety of tissues and cells. CXCL12 participates in the regulation of many physiological and pathological processes by binding to its specific receptor, C-X-C motif chemokine receptor type 4 (CXCR4), where it causes embryonic development, immune response, and angiogenesis. In addition, increasing evidence indicates that the CXCL12/CXCR4 axis plays an important role in the biological processes of tumor cells. Studies have shown that CXCL12 and its receptor, CXCR4, are highly expressed in ESCC. This abnormal expression contributes to tumor proliferation, lymph node and distant metastases, and worsening prognosis. At present, antagonists and imaging agents against CXCL12 or CXCR4 have been developed to interfere with the malignant process and monitor metastasis of tumors. This article summarizes the structure, function, and regulatory mechanism of CXCL12/CXCR4 and its role in the malignancy of ESCC. Current results from preclinical research targeting CXCL12/CXCR4 are also summarized to provide a reference for the clinical diagnosis and treatment of ESCC.     

CXCR7 expression is associated with disease-free and disease-specific survival in cervical cancer patients

Background:

The CXC chemokine receptor (CXCR)7 is involved in tumour development and metastases formation. The aim of the present study was to determine protein expression of CXCR7, its putative co-receptors epidermal growth factor receptor (EGFR) and CXCR4, its predominant ligand CXCL12, their co-dependency and their association with survival in cervical cancer patients.

Methods:

CXC chemokine receptor 7, EGFR, CXCR4 and CXCL12 expression were determined immunohistochemically in 103 paraffin-embedded, cervical cancers. Subsequently, associations with patient characteristics were assessed and survival analyses were performed.

Results:

CXC chemokine receptor 7 was expressed by 43% of tumour specimens, in a large majority of cases together with either EGFR or CXCR4 (double positive), or both (triple positive). The CXCR7 expression was associated with tumour size (P=0.013), lymph node metastasis (P=0.001) and EGFR expression (P=0.009). CXC chemokine receptor 7 was independently associated with disease-free survival (hazard ratio (HR)=4.3, 95% confidence intervals (CI) 1.7–11.0, P=0.002), and strongly associated with disease-specific survival (HR=3.9, 95% CI 1.5–10.2, P=0.005).

Conclusion:

CXC chemokine receptor 7 expression predicts poor disease-free and disease-specific survival in cervical cancer patients, and might be a promising new therapeutic marker. In a large majority of cases, CXCR7 is co-expressed with CXCR4 and/or EGFR, supporting the hypothesis that these receptors assist in CXCR7 signal transduction.     

趋化因子受体CXCR4及其配体CXCL12在胃癌组织中的表达及其意义

目的 探讨CXCR4/CXCL12在胃癌组织中表达及其在肝转移中的作用。方法 应用Western blot 检测40例胃癌患者标本中肿瘤组织、邻近正常黏膜以及肝转移组织中CXCR4/CXCL12通路成员的表达情况,免疫组织化学法检测CXCR4/CXCL12在细胞水平的分布。结果 胃癌组织中CXCR4/CXCL12表达水平明显增高（肿瘤组织vs正常黏膜,P<0.05）;10例肝转移组织中CXCR4/CXCL12表达增高（转移组织vs原发肿瘤,P<0.05）;CXCR4/CXCL12表达水平与TNM 分期晚（Ⅲ/Ⅳ）有关（P<0.05）。结论 CXCR4/CXCL12信号转导通路可能在胃癌肝转移过程中起一定作用,详细机制尚待进一步研究。     

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...     

Regional Expression of CXCL12/CXCR4 in Liver and Hepatocellular Carcinoma and Cell-cycle Variation during in vitro Differentiation

The CXCL12/CXCR4 system may be important in carcinoma. Expression of the a‐chemokine SDF‐lα (stromal cell derived factor‐lα)/CXCL12 mRNA is reduced in many carcinomas, yet its tissue protein expression may guide metastasis. Here we first compare the mRNA and protein expression of CXCL12 and its receptor CXCR4 in human liver, hepatocellular carcinoma, and malignant cell lines, and then assess cell cycle variation in CXCR4 expression. CXCR4 mRNA was present in most normal human tissues and malignant cell lines; it was only marginally reduced in hepatomas, while CXCL12 was markedly reduced, P<0.0001. Immuno‐histochemical staining of adjacent non‐malignant liver showed regional CXCR4 cytoplasmic and cell‐surface staining, limited to those hepatocytes around the central vein, a distribution resembling that of CXCL12. CXCL12 protein was not present in hepatocellular carcinoma cells in vivo, nor was cytoplasmic CXCR4 staining; nuclear CXCR4 protein expression in some malignant hepatocytes and CXCR4 staining of capillary endothelial cells around tumor cells were noted. In some malignant cell lines that had no CXCL12 on northern blots CXCL12 was weakly detectable by RT‐PCR or protein staining in the cytoplasm of a few cells. With a view to future manipulation of CXCL12/CXCR4 expression and growth we noted that in HT‐29 cells CXCR4 protein expression was less on confluent than on non‐confluent cells and varied during the cell cycle. Higher expression was associated most closely with the percentage of cells in the S‐phase and inversely with the percentage of cells in the G1‐phase. Treatment of HT‐29 cells with butyrate reduced CXCR4 cell surface expression and reduced the percentage of cells in S‐phase. In summary, CXCL12 protein expression parallels its mRNA, being markedly reduced in malignant cell lines and hepatomas; in liver, the regional distributions of CXCL12 and cytoplasmic CXCR4 are similar; finally, in HT‐29, CXCR4 expression correlates with the S‐phase of the cell cycle and is reduced during butyrate‐induced differentiation.     

Biological/pathological functions of the CXCL12/CXCR4/CXCR7 axes in the pathogenesis of bladder cancer

CXC chemokine ligand 12 (CXCL12) is an important member of the CXC subfamily of chemokines, and has been extensively studied in various human body organs and systems, both in physiological and clinical states. Ligation of CXCL12 to CXCR4 and CXCR7 as its receptors on peripheral immune cells gives rise to pleiotropic activities. CXCL12 itself is a highly effective chemoattractant which conservatively attracts lymphocytes and monocytes, whereas there exists no evidence to show attraction for neutrophils. CXCL12 regulates inflammation, neo-vascularization, metastasis, and tumor growth, phenomena which are all pivotally involved in cancer development and further metastasis. Generation and secretion of CXCL12 by stromal cells facilitate attraction of cancer cells, acting through its cognate receptor, CXCR4, which is expressed by both hematopoietic and non-hematopoietic tumor cells. CXCR4 stimulates tumor progression by different mechanisms and is required for metastatic spread to organs where CXCL12 is expressed, thereby allowing tumor cells to access cellular niches, such as the marrow, which favor tumor cell survival and proliferation. It has also been demonstrated that CXCL12 binds to another seven-transmembrane G-protein receptor or G-protein-coupled receptor, namely CXCR7. These studies indicated critical roles for CXCR4 and CXCR7 mediation of tumor metastasis in several types of cancers, suggesting their contributions as biomarkers of tumor behavior as well as potential therapeutic targets. Furthermore, CXCL12 itself has the capability to stimulate survival and growth of neoplastic cells in a paracrine fashion. CXCL12 is a supportive chemokine for tumor neovascularization via attracting endothelial cells to the tumor microenvironment. It has been suggested that elevated protein and mRNA levels of CXCL12/CXCR4/CXCR7 are associated with human bladder cancer (BC). Taken together, mounting evidence suggests a role for CXCR4, CXCR7, and their ligand CXCL12 during the genesis of BC and its further development. However, a better understanding is still required before exploring CXCL12/CXCR4/CXCR7 targeting in the clinic.     

趋化因子受体CXCR4/CXCL12信号转导通路与胃癌淋巴结转移关系的研究

目的：检测趋化因子受体CXCR4/CXCL12信号转导通路在胃癌组织、远癌正常粘膜以及转移淋巴结中的表达情况,分析CXCR4/CXCL12在胃癌淋巴结转移中的作用。方法：应用Westernblot检测胃癌组织中CXCR4/CXCL12通路成员表达。结果：胃癌组织中CXCR4/CXCL12表达水平明显高于正常胃粘膜（P〈0.05）;32例淋巴结转移癌组织中22例CXCR4/CXCL12蛋白表达高于原发癌;CXCR4/CXCL12表达水平与淋巴结转移有关（P（0.05）。结论：趋化因子受体CXCR4/CXCL12在原发胃癌及其淋巴结转移癌组织中均呈高表达,CXCR4信号转导通路可能在胃癌淋巴结转移过程中起重要作用。