支气管肺泡灌洗液CARDS毒素在重症肺炎支原体肺炎患儿中的表达及检测意义

doi:10.3969/j.issn.1006-7795.2025.02.020

摘要/Abstract

摘要： 目的分析支气管肺泡灌洗液（bronchoalveolar lavage fluid，BALF）中社区获得性呼吸窘迫综合征（community acquired respiratory distress syndrome，CARDS）毒素在重症肺炎支原体肺炎（severe Mycoplasma pneumoniae pneumonia，SMPP）患儿中的表达及检测意义。方法以2021年8月至2022年4月就诊于首都儿科研究所附属儿童医院呼吸内科诊断为肺炎支原体肺炎（Mycoplasma pneumoniae pneumonia，MPP）的患儿为研究对象，收集BALF样本，采用实时荧光定量聚合酶链反应(quantitative realtime polymerase chain reaction，qPCR）进行CARDS毒素相对表达量测定。根据病情将病例分为SMPP组和非SMPP组（对照组），对两组患者的CARDS毒素相对表达量及其他临床指标进行比较，并进行SMPP的危险因素分析。采用受试者工作特征（receiver operating characteristic，ROC）曲线分析指标的预测价值。结果 ①SMPP组CARDS毒素相对表达量（Z=－6.151）、D-二聚体（Z=－5.102）、乳酸脱氢酶（lactate dehydrogenase，LDH）（Z=－6.337）均较对照组明显升高（P<0.001）；白细胞计数（Z=－2.155）、中性粒细胞比例（t=2.988）、C反应蛋白（C-reactive protein，CRP）（Z=－3.360）较对照组升高，差异有统计学意义（P<0.05）。②CARDS毒素相对表达量与血清LDH水平呈正相关（r=0.258、P<0.05）。③二元Logistic回归分析显示，发热时间（OR=1.271，95%CI：1.079~1.497）、LDH（OR=1.011，95%CI：1.005~1.017）及CARDS毒素相对表达量（OR=6.210，95%CI：2.646~14.577）是SMPP的危险因素。3个指标联合预测SMPP的灵敏度为81.8%，特异度为85.2%。结论 CARDS毒素与MPP病情密切相关，在SMPP组明显升高，与血清LDH水平呈正相关，是SMPP的独立危险因素之一，可作为评估病情的良好指标，与发热时间、LDH联合分析具有临床意义。

关键词: 肺炎支原体肺炎, 社区获得性呼吸窘迫综合征毒素, 儿童, 支气管肺泡灌洗液, 危险因素

Abstract: Objective To analyze the expression and detection significance of community acquired respiratory distress syndrome (CARDS) toxin in bronchoalveolar lavage fluid (BALF) in children with severe Mycoplasma pneumoniae pneumonia (SMPP). Methods The BALF samples of children diagnosed with Mycoplasma pneumoniae pneumonia (MPP) were collected from the Department of Pulmonology， Children's Hospital Affiliated to Capital Institute of Pediatrics from August 2021 to April 2022, the relative expression of CARDS toxins was determined by quantitative realtime polymerase chain reaction (qPCR). The patients were divided into SMPP group and non-SMPP group (control group). The relative expression of CARDS toxin and other clinical indicators were compared between the two groups. The risk factors of SMPP were analyzed. The predictive value of the indicators was analyzed using receiver operating characteristic (ROC) curves. Results ①The relative expression level of CARDS toxin (Z=－6.151), D-dimer (Z=－5.102) and lactate dehydrogenase (LDH) (Z=－6.337) in SMPP group were significantly higher than those in control group (P<0.001). The white blood cell (Z=－2.155), neutrophil ratio (t=2.988) and C-reactive protein (CRP) (Z=－3.360) were higher than those in control group (P<0.05). ②The relative expression of CARDS toxin was positively correlated with serum LDH (r=0.258, P<0.05). ③Binary Logistic regression analysis showed that fever time (OR=1.271, 95%CI:1.079-1.497), LDH (OR=1.011, 95%CI:1.005-1.017) and CARDS toxin (OR=6.210, 95%CI: 2.646-14.577) were risk factors for SMPP. Conclusion CARDS toxin was closely related to MPP disease, and was significantly increased in SMPP group. CARDS toxin was one of the independent risk factors for SMPP and positively correlated with serum LDH level. It can be used as a good indicator to evaluate the condition，combined with fever time and LDH has clinical significance.

Key words: Mycoplasma pneumoniae pneumonia, community acquired respiratory distress syndrome toxin, children, bronchoalveolar lavage fluid, risk factor

中图分类号:

R563.1

郑宝英, 付涵宇, 薛冠华, 曹玲. 支气管肺泡灌洗液CARDS毒素在重症肺炎支原体肺炎患儿中的表达及检测意义[J]. 首都医科大学学报, 2025, 46(2): 333-339.

Zheng Baoying, Fu Hanyu, Xue Guanhua, Cao Ling. Expression and detection significance of CARDS toxin in bronchoalveolar lavage fluid in children with severe Mycoplasma pneumoniae pneumonia[J]. Journal of Capital Medical University, 2025, 46(2): 333-339.

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