Plasma levels of soluble intercellular adhesion molecule-1 as a biomarker for disease severity of patients with community-acquired pneumonia

Pin Yu Chang, Shih Ming Tsao, Jer Hwa Chang, Ming-Hsien Chien, Wen Yueh Hung, Yi Wen Huang, Shun Fa Yang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Background Community-acquired pneumonia (CAP) is characterized as an acute inflammation of the lung associated with the activation of macrophages and neutrophils. Intercellular adhesion molecule-1 (ICAM-1) is an essential adhesion molecule involved in immune cell recruitment in lung inflammation. We investigated whether ICAM-1 is a useful biomarker for assessing the disease severity of hospitalized adult patients with CAP. Methods Plasma soluble ICAM-1 (sICAM-1) levels were measured in 78 patients with CAP and 69 healthy controls by using a commercial enzyme-linked immunosorbent assay. The pneumonia severity index scores were used to determine CAP severity in patients upon initial hospitalization. Results The sICAM-1 and C-reactive protein (CRP) levels decreased significantly in patients with CAP after antibiotic treatment. The plasma concentration of sICAM-1 alone, but not CRP, was correlated with CAP severity according to the pneumonia severity index scores (r = 0.431, p < 0.001). The sICAM-1 levels in patients with CAP with high mortality risk were significantly higher than those in patients with CAP with medium or low mortality risk. Moreover, the sICAM-1 level showed a significant correlation with the length of hospital stay (r = 0.488, p < 0.001). Mechanistic investigations found that bacterial lipopolysaccharide induced upregulation of ICAM-1 expression through the c-Jun N-terminal kinase pathway in RAW264.7 macrophages. Conclusions Plasma sICAM-1 levels may play a role in the diagnosis and clinical assessment of CAP severity.

Original languageEnglish
Pages (from-to)174-180
Number of pages7
JournalClinica Chimica Acta
Volume463
DOIs
Publication statusPublished - Dec 1 2016

Keywords

  • Community-acquired pneumonia
  • ICAM-1
  • JNK pathway
  • LPS

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Biochemistry, medical

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