检验医学 ›› 2018, Vol. 33 ›› Issue (3): 222-227.DOI: 10.3969/j.issn.1673-8640.2018.03.009

• 技术研究与评价?论著 • 上一篇    下一篇

电化学发光法检测胃泌素释放肽前体的性能评价及临床应用评估

沈隽霏, 吴文浩, 周佳烨, 王蓓丽, 郭玮, 潘柏申   

  1. 复旦大学附属中山医院检验科,上海 200032
  • 收稿日期:2017-05-11 出版日期:2018-03-20 发布日期:2018-04-19
  • 作者简介:null

    作者简介:沈隽霏,男,1990年生,学士,技师,主要从事临床分子生物学检验工作。

    通信作者:王蓓丽,联系电话:021-64041990-2376。

  • 基金资助:
    国家自然科学基金面上项目(81572064);上海市卫生计生系统重要薄弱学科建设项目(2015ZB0201);上海申康医院发展中心课题(SHDC22014017)

Performance of pro-gastrin-releasing peptide assay by electrochemiluminescence immunoassay

SHEN Junfei, WU Wenhao, ZHOU Jiaye, WANG Beili, GUO Wei, PAN Baishen   

  1. Department of Clinical Laboratory,Zhongshan Hospital,Fudan University,Shanghai 200032,China
  • Received:2017-05-11 Online:2018-03-20 Published:2018-04-19

摘要: 目的 对电化学发光法检测胃泌素释放肽前体(ProGRP)的性能进行评价并初步评估其临床应用价值。方法 选取127例肺癌患者[小细胞肺癌(SCLC)48例、非小细胞肺癌(NSCLC)79例]、40例肺部良性疾病患者、60例其他肿瘤患者、20例自身免疫性疾病患者及120名表观健康者(正常对照组),分别采用电化学发光法、化学发光微粒子免疫法和酶联免疫吸附试验(ELISA)检测血清ProGRP水平,评价电化学发光法检测ProGRP的精密度、线性、正确度、参考区间以及3种方法检测结果的一致性。采用受试者工作特征(ROC)曲线分析ProGRP单项检测及与癌胚抗原(CEA)、神经元特异性烯醇化酶(NSE)、细胞角蛋白19片段(CYFRA21-1)联合检测诊断SCLC的性能,比较3种方法检测ProGRP诊断SCLC的效能。结果 电化学发光法检测高、低水平ProGRP的批内精密度为0.8%和1.2%,批间精密度为0.9%和2.2%。高、低水平定值样本的回收率分别为99.86%和98.32%,线性范围为33.13~4 796.00 pg/mL,20名表观健康者ProGRP水平均在试剂盒提供的参考区间(0~69.2 pg/mL)内。Pearson相关分析显示电化学发光法、化学发光微粒子免疫法和ELISA的相关性良好,Bland-Altman偏差分析显示3种方法检测结果在低值区域一致性良好,但随着检测结果的增加,偏差逐渐增大。SCLC组ProGRP水平明显高于其他各组(P<0.05),而其他组间差异均无统计学意义(P>0.05)。ProGRP诊断SCLC的最佳临界值为66.65 pg/mL,敏感性为79.2%,特异性为95.3%;ProGRP联合NSE诊断SCLC的敏感性为83.3%、特异性为96.2%,诊断性能明显优于单项检测(P<0.05),与4项指标联合检测的诊断性能比较,差异无统计学意义(P>0.05)。电化学发光法、化学发光微粒子免疫法和ELISA检测ProGRP诊断SCLC的效能无差异(P>0.05)。结论 电化学发光法检测ProGRP的各项性能指标均符合检测要求。ProGRP作为一项辅助诊断SCLC的可靠指标,具有广阔的临床应用前景。

关键词: 胃泌素释放肽前体, 电化学发光法, 小细胞肺癌

Abstract:

Objective To assess the performance of pro-gastrin-releasing peptide (ProGRP) assay by electrochemiluminescence immunoassay. Methods A total of 127 lung cancer patients [48 small-cell lung cancer (SCLC)patients and 79 non-small-cell lung cancer (NSCLC)patients],40 benign lung disease patients,60 other tumor patients,20 autoimmune disease patients and 120 healthy subjects (healthy control group) were enrolled. Serum levels of ProGRP were determined by electrochemiluminescence immunoassay,chemiluminescence microparticle immunoassay and enzyme-linked immunosorbent assay(ELISA). The precisions,accuracies,linearities and reference intervals of the 3 methods were assessed. Receiver operating characteristic(ROC)curve was used to evaluate the diagnostic efficiency of ProGRP determination independently and ProGRP determination combined with carcinoembryonic antigen(CEA),neuron specific enolase(NSE)and cytokeratin 19-fragment(CYFRA21-1). The diagnostic efficiency of the 3 methods was compared. Results The within-run and between-run precisions of high-level and low-level ProGRP were 0.8%,1.2% and 0.9%,2.2%,respectively. The recoveries were 99.86% and 98.32%,respectively. There was a good linear range of 33.13-4 796.00 pg/mL. For healthy control group,the reference interval was 0-69.2 pg/mL. Pearson correlation analysis showed that there was a correlation among the 3 methods. Bland-Altman analysis showed a good consistency in low-level region among the 3 methods,but the bias was increased with the increasing results. The level of ProGRP in SCLC group was higher than those in the other groups (P<0.05),and there was no statistical significance among the other groups (P>0.05). The optimal cut-off value was 66.65 pg/mL. The sensitivity and specificity were 79.2% and 95.3%,respectively. The sensitivity and specificity increased to 83.3% and 96.2% for the combined determination with NSE (P<0.05),and there was no statistical significance compared with those for the combined determination with CEA,NSE and CYFRA21-1(P>0.05). The diagnostic efficiency of the 3 methods for SCLC had no difference(P>0.05).Conclusions The performance of ProGRP assay by electrochemiluminescence immunoassay is accordance with expected requirements. ProGRP can be as a reliable marker for the diagnosis of SCLC.

Key words: Pro-gastrin-releasing peptide, Electrochemiluminescence immunoassay, Small-cell lung cancer

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