检验医学 ›› 2016, Vol. 31 ›› Issue (12): 1021-1025.DOI: 10.3969/j.issn.1673-8640.2016.12.003

• 临床应用研究·论著 • 上一篇    下一篇

血浆游离DNA作为急性冠状动脉综合征诊断生物标志物的价值

丛辉1, 景蓉蓉1, 王惠民1, 吴晓晖2, 储海丹1, 范勐康2, 鞠少卿1   

  1. 1.南通大学附属医院检验科,江苏 南通 226001
    2.南通大学附属医院心内科,江苏 南通 226001
  • 收稿日期:2016-06-22 出版日期:2016-12-25 发布日期:2016-12-29
  • 作者简介:null

    作者简介:丛 辉,男,1973年生,硕士,副主任技师,主要从事分子生物学标志物研究。

    通讯作者:鞠少卿,联系电话:0513-85052103。

  • 基金资助:
    江苏省“六大人才高峰”项目(WS-066);南通市社会事业科技创新与示范项目(HS2014059)

Plasma cell-free DNA as a biomarker for the diagnosis of acute coronary syndrome

CONG Hui1, JING Rongrong1, WANG Huimin1, WU Xiaohui2, CHU Haidan1, FAN Mengkang2, JU Shaoqin1   

  1. 1. Department of Clinical Laboratory,Affiliated Hospital of Nantong University,Nantong 226001,Jiangsu,China
    2. Department of Cardiology,Affiliated Hospital of Nantong University,Nantong 226001,Jiangsu,China
  • Received:2016-06-22 Online:2016-12-25 Published:2016-12-29

摘要:

目的 Alu为靶基因,探讨血浆游离DNA(cfDNA)作为急性冠状动脉综合征(ACS)诊断生物标志物的价值。方法 采用基于Alu基因的支链DNA(bDNA)技术定量检测140例ACS患者(ACS组)和60名健康体检者(正常对照组)血浆cfDNA水平,并对部分行经皮冠状动脉介入治疗(PCI)术的ACS患者进行术前和术后的动态观测。采用化学发光法检测心肌肌钙蛋白I(cTnI)、肌酸激酶同工酶(CK-MB)、肌红蛋白(MYO)水平,分析cfDNA与cTnI、CK-MB、MYO的相关性,采用受试者工作特征(ROC)曲线评价cfDNA诊断ACS的价值。结果 ACS组血浆cfDNA水平为2 550.3(969.9~4 866.4)ng/mL,明显高于正常对照组[118.3(81.1~221.1)ng/mL,P<0.001]。10例行PCI术的ACS患者术前、术后血浆cfDNA水平差异无统计学意义(P>0.05),但术后呈下降趋势。cfDNA与cTnI、CK-MB、MYO水平无相关性(r2=0.031、0.152、0.217,P>0.05)。ROC曲线分析显示cfDNA诊断ACS的ROC曲线下面积(0.95)和敏感性(82.76%)优于cTnI(0.57和22.41%)、CK-MB(0.81和20.69%)及MYO(0.64和10.34%),4项指标的特异性均为100.00%。结论 ACS患者cfDNA水平明显升高,其临床诊断效能明显高于目前临床常用的心肌标志物,可作为诊断ACS重要的生物学指标。

关键词: 游离DNA, Alu基因, 生物标志物, 急性冠状动脉综合征

Abstract:

Objective To investigate the significance of plasma cell-free DNA(cfDNA) as a biomarker for the diagnosis of acute coronary syndrome(ACS) by choosing Alu as a target gene.Methods Blood specimens of 140 patients with ACS(ACS group) and 60 healthy subjects(healthy control group) were collected. A branched DNA(bDNA) assay based on Alu gene was used to determine the concentration of cfDNA,and the serial changes of cfDNA concentrations were observed dynamically in some ACS patients before and after percutaneous coronary intervention(PCI). The concentrations of cardiac troponin I(cTnI),creatine kinase-MB(CK-MB) and myoglobin(MYO) were determined by chemiluminescence assay,and the correlations of cfDNA with cTnI,CK-MB and MYO were analyzed. Receiver operating characteristic (ROC) curve was performed for evaluating the significance of cfDNA in the diagnosis of ACS. Results The concentration of cfDNA was higher in ACS group [2 550.3(969.9-4 866.4) ng/mL] than that in healthy control group [118.3(81.1-221.1) ng/mL,P<0.001]. The concentration of cfDNA was decreased in 10 patients after PCI,and there was no statistical significance for cfDNA concentration before and after PCI(P>0.05). No correlation was found between cfDNA concentration and cTnI,CK-MB,MYO in patients with ACS (r2=0.031,0.152 and 0.217,P>0.05). ROC curves showed that the areas under the curves(0.95) and the sensitivities of cfDNA(82.76%) were better than those of cTnI(0.57 and 22.41%),CK-MB(0.81 and 20.69%) and MYO(0.64 and 10.34%). The specificities of the 4 parameters were all 100.00%. Conclusions Plasma concentration of cfDNA is increased in ACS patients,its diagnosis significance is better than those of commonly-used myocardial biomarkers,and cfDNA may be an important biomarker for the diagnosis of ACS.

Key words: Cell-free DNA, Alu gene, Biomarkers, Acute coronary syndrome

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