检验医学 ›› 2017, Vol. 32 ›› Issue (2): 138-142.DOI: 10.3969/j.issn.1673-8640.2017.02.016

• 技术研究与评价·论著 • 上一篇    下一篇

纳米颗粒增强透射免疫比浊法检测乳酸脱氢酶同工酶3方法的建立及性能评价

董奕裕1, 吴奕征2, 沈丽丽3, 陈群3   

  1. 1. 浙江省荣军医院检验科,浙江 嘉兴 314000
    2. 浙江大学医学院临床医学系,浙江 杭州 310029
    3. 浙江省荣军医院内科,浙江 嘉兴 314000
  • 收稿日期:2016-02-03 出版日期:2017-03-30 发布日期:2017-03-30
  • 作者简介:null

    作者简介:董奕裕,男,1968年生,硕士,主管技师,主要从事临床免疫检测工作。

  • 基金资助:
    嘉兴市科技局计划项目(2013AY21065)

Establishment and performance of nano particle-enhanced turbidimetric immunoassay for determining serum lactate dehydrogenase isoenzyme 3

DONG Yiyu1, WU Yizheng2, SHEN Lili3, CHEN Qun3   

  1. 1. Department of Clinical Laboratory,Rongjun Hospital of Zhejiang,Jiaxing 314000,Zhejiang,China
    2. Department of Clinical Medicine,Zhejiang University School of Medicine,Hangzhou 310029,Zhejiang,China
    3. Department of Internal Medicine,Rongjun Hospital of Zhejiang,Jiaxing 314000,Zhejiang,China
  • Received:2016-02-03 Online:2017-03-30 Published:2017-03-30

摘要:

目的 建立纳米颗粒增强透射免疫比浊法(PETIA)测定乳酸脱氢酶同工酶3(LDH3)的分析方法。方法 确定最适反应条件,包括抗体浓度、胶乳微球粒径、交联剂[1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐(EDAC)/N-羟基琥珀酰亚胺(NHS)]浓度、缓冲液种类及pH值、反应时间,并建立检测血清LDH3的PETIA方法。按美国临床实验室标准化委员会(NCCLS)EP5-A2文件要求,评价方法的精密度、线性范围、回收率、抗干扰能力和分析灵敏度,并初步建立参考区间。结果 PETIA最适反应条件:抗体浓度为0.1 mg/mL、胶乳微球粒径为120 nm、交联剂(EDAC/NHS)浓度为10 mg/mL、缓冲液为磷酸盐缓冲液(PBS)、pH值为7.8时偶联率最佳,室温(25 ℃)和低温(4 ℃)放置24 h偶联率保持不变。采用建立的PETIA检测LDH3低值(16.5 U/L)、中值(65.0 U/L)和高值(155.0 U/L)的批内变异系数(CV)分别为5.77%、4.02%、3.77%,批间CV分别为6.59%、4.44%、3.93%;线性范围为3.6~200.0 U/L;平均回收率为102.1%;900 U/L类风湿因子、500 μmol/L胆红素、9 mmol/L甘油三酯、5 g/L血红蛋白、5 g/L维生素C均无明显干扰;分析灵敏度为3.6 U/L;参考区间为13.5~75.9 U/L。结论 建立的PETIA测定LDH3具有方法简单、快速、灵敏等优点,且结果准确,可用于全自动生化分析仪,能够满足临床检验的要求。

关键词: 乳酸脱氢酶同工酶3, 纳米颗粒增强透射免疫比浊法, 性能评价

Abstract:

Objective To establish nano particle-enhanced turbidimetric immunoassay(PETIA) for determining serum lactate dehydrogenase isoenzyme 3(LDH3).Methods The optimal reaction conditions [antibody concentration,latex particle size,1-ethyl-3-(3-dimethylaminopropyl)carbodiimide(EDAC)/ N-hydroxysuccinimido(NHS) concentration,the kind and pH value of buffer solution and reaction time] were determined. PETIA for determining serum LDH3 was established. According to the National Committee for Clinical Laboratory Standards EP5-A2,the precision,linear range,recovery rate,anti-interference ability and analytic sensitivity were evaluated,and the initial reference interval was established.Results The optimal reaction conditions were antibody concentration 0.1 mg/mL,latex particle size 120 nm,EDAC/ NHS concentration 10 mg/mL,phosphate buffered saline(PBS) with pH value 7.8 and coupling rate remaining unchanged under room temperature(25 ℃)and low temperature(4 ℃) for 24 h. For LDH3 with low value(16.5 U/L),median value(65.0 U/L) and high value(155.0 U/L),the within-run coefficients of variation(CV) were 5.77%,4.02% and 3.77%,and the between-run CV were 6.59%,4.44% and 3.93%. The linear range was 3.6-200.0 U/L. The average recovery rate was 102.1%. The factors of 900 U/L rheumatoid factor,500 μmol/L bilirubin,9 mmol/L triglyceride,5 g/L hemoglobin,5 g/L vitamin C had no interference for PETIA in the determination of LDH3. The analytic sensitivity was 3.6 U/L. The reference interval was 13.5-75.9 U/L. Conclusions PETIA for the determination of LDH3 is simple,rapid,sensitive and accurate,and it can be used in automatic biochemical analyzers,which can meet the requirements of clinical determination.

Key words: Lactate dehydrogenase isoenzyme 3, Nano particle-enhanced turbidimetric immunoassay, Performance evaluation

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