Changes to surfactant proteins in the bronchoalveolar lavage fluid and serum of children with Mycoplasma pneumoniae pneumonia].

To study the changes to surfactant proteins in the serum and bronchoalveolar lavage fluids (BALF) of children with Mycoplasma pneumoniae pneumonia (MPP) and their significance. Self-control method was used in the study. Forty-seven MPP children were divided into single lung infected (n=32) and bilateral lung infected groups (n=15) according to lung CT results. Surfactant proteins SP-A, B, C and D were measured using ELISA in the serum and BALF in the two groups. The correlations between SP-A, B, C and D content in the serum and BALF were evaluated by Spearman correlation analysis. SP-A, B, C and D content in BALF from the majorly infected or infected lung were significantly higher than from the opposite lung and serum (P<0.01). SP-A, B and C content in serum was significantly lower than in BALF from the non-infected lung in the single-side infected lung group (P<0.01 or 0.05), but there was no significant difference between serum SP-D content and BALF SP-D content from the non-infected lung. There were no significant differences in SP-A, B, C and D content in serum and BALF from the minorly infected lung in the bilateral lung infected group. Serum SP-D content was positively correlated with BALF SP-D content from the majorly infected lung in the bilateral lung infected group (P<0.01). Serum SP-D content may serve as a biomarker for evaluating the severity of pulmonary infection in children with community-acquired pneumonia.

Citation

Lin-Hua Shu, Yun-Xiao Shang, Xu-Xu Cai, Han Zhang, Miao Li, Qian-Lan Zhou, Zhi-Hong Zong, Xiao-Na Meng, Xiang Li, Fen Liu. Changes to surfactant proteins in the bronchoalveolar lavage fluid and serum of children with Mycoplasma pneumoniae pneumonia]. Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics. 2012 Dec;14(12):928-32

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PMID: 23234780

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