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  • Title: Increased levels of circulating soluble CD14 in Kawasaki disease.
    Author: Takeshita S, Nakatani K, Tsujimoto H, Kawamura Y, Kawase H, Sekine I.
    Journal: Clin Exp Immunol; 2000 Feb; 119(2):376-81. PubMed ID: 10632678.
    Abstract:
    The CD14 molecule, which is known to be a receptor for endotoxin, is expressed on monocytes and neutrophils. It is found as a soluble CD14 (sCD14) in circulation, and the plasma level has been shown to be increased in some infectious diseases, including sepsis. To investigate the potential significance of circulating sCD14 in Kawasaki disease (KD), the plasma level of sCD14 was measured using ELISA in patients with KD, patients with a Gram-negative bacterial infection (GNBI) including sepsis, patients with viral infection (VI), and healthy controls. We also analysed CD14 receptor expression in monocytes and neutrophils using flow cytometry and a semiquantitative reverse transcription-polymerase chain reaction. Although KD patients had significantly lower counts of peripheral neutrophils and monocytes than GNBI patients, KD patients had significantly higher levels of sCD14 than GNBI. No significant correlations were observed between sCD14 levels and clinical laboratory values or the cytokine (interferon-gamma, tumour necrosis factor-alpha) levels in the acute phase. The mean intensity of CD14 receptor expression on neutrophils markedly increased in the acute phases of KD and GNBI compared with that in their convalescent phases, while that on monocytes decreased. The expression of CD14 mRNA in neutrophils increased in the acute phases of KD and GNBI, while that in monocytes did not decrease but instead remained quite abundant. The present findings suggest that the elevated level of circulating sCD14 appears to be an important parameter for KD and that sCD14 shedding is accompanied by different kinetics regarding the expression of CD14 antigen and CD14 gene between monocytes and neutrophils.
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