检验医学 ›› 2019, Vol. 34 ›› Issue (9): 775-779.DOI: 10.3969/j.issn.1673-8640.2019.09.001

• 临床应用研究?论著 •    下一篇

lncRNA CCAT2在胃癌患者血清中的表达及其临床诊断意义

曹季军1, 王金湖1, 申娴娟2, 鞠少卿3()   

  1. 1.太仓市第一人民医院检验科,江苏 太仓 215400
    2.南通大学附属医院临床医学研究中心,江苏 南通 226001
    3.南通大学附属医院检验医学中心,江苏 南通 226001
  • 收稿日期:2018-05-08 出版日期:2019-09-30 发布日期:2019-09-29
  • 作者简介:null

    作者简介:曹季军,男,1981年生,硕士,主管技师,主要从事肿瘤分子标志物研究。

  • 基金资助:
    国家自然科学基金项目(81672099);江苏省重点研发专项(BE2015654);南通市“临床实验诊断研究中心”建设项目(HS2015002)

Expression and clinical significance of long noncoding RNA CCAT2 in serum of patients with gastric cancer

CAO Jijun1, WANG Jinhu1, SHEN Xianjuan2, JU Shaoqing3()   

  1. 1. Department of Clinical Laboratory,the First People's Hospital of Taicang,Taicang 215400,Jiangsu,China
    2. Center for Clinical Medicine Research,the Affiliated Hospital of Nantong University,Nantong 226001,Jiangsu,China
    3. Department of Clinical Laboratory,the Affiliated Hospital of Nantong University,Nantong 226001,Jiangsu,China
  • Received:2018-05-08 Online:2019-09-30 Published:2019-09-29

摘要:

目的 探讨血清中长链非编码RNA(lncRNA)结直肠癌相关转录本2(CCAT2)的相对表达水平在胃癌(GC)早期诊断和预后监测中的临床意义及应用价值。方法 收集经过南通大学附属医院病理科确诊的40例GC患者术前与术后血清,30例胃良性病变(胃溃疡及胃息肉)患者血清,并收集同期43名年龄相仿体检健康者血清。采用实时荧光定量聚合酶链反应(PCR)定量检测血清CCAT2的相对表达量;用化学发光免疫分析法检测血清肿瘤标志物癌胚抗原(CEA)和糖类抗原19-9(CA19-9)的水平。用受试者工作特征(ROC)曲线评价CCAT2对GC的诊断效能。结果 初诊GC患者血清CCAT2的相对表达量升高,且显著高于胃良性病变患者和健康对照者(P<0.01),而胃良性病变患者与健康对照者之间差异无统计学意义(P>0.05)。GC患者术前CCAT2的表达量高于术后,差异有统计学意义(P<0.01);初诊GC患者血清CCAT2的高表达与肿瘤大小(P=0.028)、TNM分期(P=0.012)、淋巴结转移(P=0.034)相关,与GC患者的年龄和性别不相关(P>0.05)。在诊断效能上,以0.985作为CCAT2诊断GC的临界值,其曲线下面积(AUC)为0.851[95%可信区间(CI)0.772~0.930,P<0.05];在鉴别GC患者与胃良性病变患者时,以1.125作为临界值,其AUC为0.808(95% CI 0.701~0.916,P<0.05)。血清CCAT2与CEA、CA19-9联合检测诊断GC的敏感性为98%,但各指标表达量间没有明显的相关性。结论 CCAT2可作为一种新的生物学标志物,在GC的诊断、预后判断中有一定的价值,且与CEA和CA19-9联合检测可提高对GC的诊断效能。

关键词: 胃癌, 长链非编码RNA, 结直肠癌相关转录本2, 早期诊断

Abstract:

Objective To investigate the relative expression of serum long noncoding RNA(lncRNA) colon cancer-associated transcript 2(CCAT2) in patients with gastric cancer(GC) and its role in the early diagnosis and prognosis monitoring of GC. Methods A total of 40 GC patients diagnosed by pathology department were enrolled from the Affiliated Hospital of Nantong University,and their preoperative and postoperative serum samples were collected. Totally,30 patients with gastric benign lesions(gastric ulcers and gastric polyps) and 43 age-matched healthy subjects(healthy control group) were enrolled. The relative expression of CCAT2 was determined by real-time fluorescence quantitation polymerase chain reaction(PCR),and chemiluminescence immunoassay was used to determine carcinoembryonic antigen(CEA)and carbohydrate antigen 19-9(CA19-9). Receiver operating characteristic(ROC) curve was used to evaluate the diagnostic efficiency of CCAT2. Results Comparing with gastric benign lesion and healthy control groups,the relative expression of CCAT2 were higher in GC group(P<0.01),and there was no statistical significance between gastric benign lesion and healthy control groups(P>0.05). The preoperative relative expression of CCAT2 was higher than postoperative one with statistical significance(P<0.01). High expression levels of CCAT2 were correlated with tumor size(P=0.028),TNM stage(P=0.012) and lymph node metastasis(P=0.034),and there was no correlation with age and sex(P>0.05). The area under ROC curve(AUC) of CCAT2 was 0.851 [95% confidence interval(CI) 0.772-0.930,P<0.05] for the differential diagnosis of GC patients from healthy subjects. For the differential diagnosis of GC from gastric benign lesions,the AUC was 0.808(95% CI 0.701-0.916,P<0.05) as the cut-off value of 1.125. The combined determination of CCAT2 with CEA and CA19-9 can improve the sensitivity(98%). There was no correlation between relative expression of CCAT2 and CEA,CA19-9 in GC group. Conclusions As a new biological marker,CCAT2 plays a role in the diagnosis and prognosis monitoring of GC,and it can improve the diagnostic efficiency combined with CEA and CA19-9 in GC patients.

Key words: Gastric cancer, Long noncoding RNA, Colon cancer-associated transcript 2, Early diagnosis

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