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中华肺部疾病杂志(电子版) ›› 2019, Vol. 12 ›› Issue (06) : 733 -737. doi: 10.3877/cma.j.issn.1674-6902.2019.06.013

论著

血清LTBP2作为特发性肺纤维化患者预后标志物的研究
张致苍1, 雷尚昆2,()   
  1. 1. 721000 宝鸡,宝鸡市人民医院重症医学科
    2. 721000 宝鸡,宝鸡市中心医院胸外科
  • 收稿日期:2019-07-12 出版日期:2019-12-20
  • 通信作者: 雷尚昆

Clinical value of serum latent transforming growth factor β-binding protein-2 as prognostic marker in patients with idiopathic pulmonary fibrosis

Zhicang Zhang1, Shangkun Lei2,()   

  1. 1. Department of Critical Care Medicine, Baoji People′s Hospital, Baoji 721000, Shaanxi Province, China
    2. Department of Thoracic Surgery, Baoji Central Hospital, Baoji 721000, Shaanxi Province, China
  • Received:2019-07-12 Published:2019-12-20
  • Corresponding author: Shangkun Lei
引用本文:

张致苍, 雷尚昆. 血清LTBP2作为特发性肺纤维化患者预后标志物的研究[J]. 中华肺部疾病杂志(电子版), 2019, 12(06): 733-737.

Zhicang Zhang, Shangkun Lei. Clinical value of serum latent transforming growth factor β-binding protein-2 as prognostic marker in patients with idiopathic pulmonary fibrosis[J]. Chinese Journal of Lung Diseases(Electronic Edition), 2019, 12(06): 733-737.

目的

探讨血清潜在转化生长因子结合蛋白2(LTBP2)作为特发性肺纤维化(IPF)患者预后标志物的临床价值。

方法

回顾性选择2010年1月至2015年12月来我院接受治疗的IPF患者120例。根据患者随访结局分为预后良好组70例和预后不良组50例。比较两组患者在临床特征方面的差异。血清LTBP2水平与临床特征间相关性利用Pearson相关分析。影响IPF患者预后的多因素分析采用Cox比例风险模型。采用受试者工作特征曲线(ROC)筛选切点,计算曲线下面积评估血清LTBP2的预测效力。

结果

预后不良组在SGRQ评分、血清LTBP2水平方面高于预后良好组,差异有统计学意义(P<0.05),在6 min步行试验、肺总量(TLC)占预计值百分比、肺弥散量(DLco)占预计值百分比、LAA-950、平均肺密度比、PaO2方面低于预后良好组,差异有统计学意义(P<0.05)。Pearson相关分析结果显示,血清LTBP2水平与TLC占预计值百分比、DLco占预计值百分比、LAA-950、平均肺密度比、PaO2呈负相关(P<0.05),与SGRQ评分呈正相关(P<0.05)。Cox比例风险模型分析结果显示,PaO2、血清LTBP2水平是是影响IPF患者预后的危险性因素(P<0.05)。血清LTBP2水平预测IPF患者预后不良的最佳诊断界值为12.25 ng/ml。

结论

血清LTBP2水平偏高不利于IPF患者预后,血清LTBP2水平可作为预测IPF患者预后的重要分子标志物。

Objective

To investigate the clinical value of serum latent transforming growth factor β-binding protein-2 (LTBP2) as a prognostic marker for the patients with idiopathic pulmonary fibrosis (IPF).

Methods

A total of 120 patients with IPF confirmed in our hospital from January 2010 to December 2015 were selected as the study subjects. The patients were divided into two groups according to the patients′follow-up outcome: the good prognosis group (n=70) and the poor prognosis group (n=50). The differences in the clinical characteristics between the two groups were compared. The correlation between serum LTBP2 level and clinical characteristics was analyzed by Pearson correlation analysis. Cox proportional hazards model was used to analyze the prognosis of IPF patients. ROC was used to screen the cut points and calculate the area under the curve to evaluate the predictive effect of serum LTBP2.

Results

The SGRQ score and serum LTBP2 level were significantly higher in the poor prognosis group than the good prognosis group (P<0.05). The results of the 6-min walk test, the percentage of the total lung capacity (TLC) in the predicted value, the percentage of the diffusing capacity of the lungs for carbon monoxide (DLco) in the predicted value, the LAA-950 ratio, the partial pressure of oxygen in artery (PaO2), and the average lung density were significantly lower in the poor prognosis group than the good prognosis group (P<0.05). Pearson correlation analysis showed that the serum LTBP2 levels were negatively correlated with the TLC as a percentage of the predicted value, the DLco as a percentage of the predicted value, the LAA-950, the mean lung density ratio, and PaO2 (P<0.05), and positively correlated with the SGRQ score (P<0.05). Cox proportional hazard model analysis showed that the PaO2 and the serum LTBP2 levels were risk factors for the prognosis of IPF patients (P<0.05). The best diagnostic limit of the serum LTBP2 level for predicting the poor prognosis of the IPF patients was 12.25 ng/ml.

Conclusion

The high level of serum LTBP2 is not conducive to the prognosis of IPF patients, but the level of serum LTBP2 can be used as an important molecular marker for predicting the prognosis of IPF patients.

表1 两组患者临床特征比较
表2 血清LTBP2水平与临床指标的相关性
表3 影响IPF患者预后的Cox比例风险模型分析
图1 血清LTBP2水平预测IPF患者预后不良的ROC曲线
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