摘要
目的观察CXC趋化因子受体-5(CXCR5)及其特异性配体CXCL13在结直肠癌组织中的表达,探讨其与临床病理特征、预后的关系。方法用实时定量聚合酶链反应(Real-timePCR)法检测25对结直肠癌及13例结直肠腺瘤冰冻新鲜标本中CXCR5及CXCL13mRNA的表达,应用免疫组织化学法(IHC)检测153例结直肠癌及相对应的癌旁组织、62例结直肠腺瘤标本中CXCR5及CXCL13蛋白的表达,分析其与临床病理特征、术后生存率的关系。结果CXCR5及CXCL13mRNA及蛋白表达在结直肠癌组织中的表达率均高于癌旁组织及结直肠腺瘤组织(P均〈0.05)。CXCR5与CXCL13的mRNA及蛋白表达呈正相关(PCR:r=0.681,P〈0.01;IHC:r=0.196,P〈0.05)。CXCR5.CXCL13蛋白表达与肿瘤的淋巴结转移、远处转移、肿瘤分期及复发相关;在有淋巴结转移、有远处转移、中晚期患者及出现复发的患者中阳性率都明显较高(P〈0.05)。此外,CXCL13阳性表达与结直肠癌的组织分化程度相关,分化越差组阳性率越高(P〈0.05)。CXCR5一CXCL13表达与其他临床病理特征无关(P〉O.05)。CXCR5及CXCL13阳性表达患者的5年复发率和5年生存率明显差于其阴性表达的患者(5年复发率:CXCR5:48.6%比14.8%,CXCL13:41.5%比22.7%;5年生存率:CXCR5:55.6%比91.4%,CXCL13:61.5%比84.1%)(P〈0.05);CXCR5及CXCL13阳性表达患者的中位复发时间和中位生存时间明显短于其阴性表达的患者[中位复发时间:CXCR5(13.0±1.3)个月比(45.0±7.8)个月,CXCL13(13.0±1.3)个月比(29.0±11.2)个月;中位生存时间:CXCR5(17.0±1.1)个月比(55.0±14.4)个月,CXCL13(17.0±1.9)个月比(25.0±11.2)个月](P〈0.05)。结论CXCR5及CXCL13在结直肠癌的发生、发展和转移、复发中可能起着重要的作用,可作为预测结直肠癌转移和复发的有价值指标。
Objective To investigate the correlation between CXC chemokine receptor-5 (CXCRS) -CXCL13 expression and clinicopathological features in colorectal carcinoma. Methods The real-time transcription polymerase chain reaction (Real-time PCR) technique was used to examine mRNA expression of CXCR5 and CXCL13 in 25 paired specimens of colorectal cancer and tissues adjacent carcinoma and 13 samples of colorecal adenoma. The immunohistochemistry staining method was used to detect the pro- tein expression of CXCR5 and CXCL13 in 153 paired specimens of colorectal cancer and tissues adjacent car- cinoma and 62 samples of colorecal adenoma. Results The mRNA and protein levels of CXCRS-CXCL13 in colorectal cancer were up-regulated than tissues adjacent carcinoma and adenoma (P 〈 0. 05). The mRNA and protein levels of CXCRS-CXCL13 in colorectal cancer correlated positively ( PCR: r = 0. 681, P 〈 0. 01 ; IHC: r = 0. 196, P 〈 0. 05 ). The positive stain of CXCRS-CXCL13 correlated with lymph node involved, metastasis, higher TNM stage and relapse(P 〈 0. 05). Additionally, CXCLI3 positive staining correlated with poor differentiation ( P 〈 0.05 ). By Kaplan-Merie' s analysis, CXCRS-CXCL13 positive staining favored poor prognosis parameters, such as 5-year relapse rate (CXCRS: 48. 6% vs. 14. 8%, CXCL13 : 41.5% vs. 22. 7% ), 5-year survival rate ( CXCR5 : 55.6% vs. 91.4% , CXCL13 : 61.5% vs. 84. 1% ), the median disease free time [ CXCR5 : ( 13.0 ± 1.3 ) months vs. (45.0 ± 7.8 ) months, CXCL13:(13.0± 1.3 ) months vs. (29. 0 ± 11.2) monthsl and the median survival time [ CXCR5:(17.0 ± 1.1) months vs. (55.0 ± 14.4) months, CXCL13:(17.0± 1.9) months vs. (25.0 ±11.2) months] (P 〈0. 05). Conclusion CXCR5 and CXCL13 may play a crucial role in carcinogenesis, devel- opment, metastasis and relapse of colon cancer. It can be used as prognostic markers of colon cancer in clini- cal practice.
出处
《中华实验外科杂志》
CAS
CSCD
北大核心
2013年第8期1741-1745,共5页
Chinese Journal of Experimental Surgery
基金
江苏省无锡市科技计划资助项目(CSEY1N1106)