Levels of surfactant proteins A and D in bronchoalveolar lavage fluid of children with pneumonia and their relationships with clinical characteristics.
- Author:
Li-Li WANG
1
;
Shou-Yan ZHENG
;
Luo REN
;
Qiu-Yan XIAO
;
Xiao-Ru LONG
;
Jian LUO
;
Qu-Bei LI
;
Yu DENG
;
Xiao-Hong XIE
;
En-Mei LIU
Author Information
- Publication Type:Journal Article
- MeSH: Bronchoalveolar Lavage Fluid; chemistry; C-Reactive Protein; analysis; Child; Child, Preschool; Enzyme-Linked Immunosorbent Assay; Female; Humans; Infant; Male; Pneumonia; metabolism; Pulmonary Surfactant-Associated Protein A; analysis; Pulmonary Surfactant-Associated Protein D; analysis
- From: Chinese Journal of Contemporary Pediatrics 2016;18(5):386-390
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo observe the levels of pulmonary surfactant proteins A and D (SP-A, SP-D) in bronchoalveolar lavage fluid (BALF) of children with pneumonia, and to explore their relationships with clinical characteristics.
METHODSThirty-five children with pneumonia were enrolled in this study. Differential cell counts were obtained by Countstar counting board. The levels of SP-A and SP-D in BALF were detected using ELISA.
RESULTSIn children with pneumonia, SP-D levels were significantly higher than SP-A levels (P<0.001). SP-D levels were negatively correlated with the neutrophil percentage in BALF (r(s)=-0.5255, P<0.01). SP-D levels in BALF in children with increased blood C-reactive protein levels (>8 mg/L) were significantly lower than in those with a normal level of C-reactive protein (P<0.05). Compared with those in children without wheezing, SP-D levels in children with wheezing were significantly lower (P<0.01). There was no correlation between SP-A levels and clinical characteristics.
CONCLUSIONSSP-D levels in BALF are significantly higher than SP-A levels, and have a certain correlation with clinical characteristics in children with pneumonia. As a protective factor, SP-D plays a more important role than SP-A in regulating the immune and inflammatory responses.
