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자료유형
학술저널
저자정보
저널정보
대한중환자의학회 Acute and Critical Care Acute and Critical Care 제33권 제1호
발행연도
2018.1
수록면
34 - 41 (8page)

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Background: Flecainide acetate is a drug used primarily for cardiac arrhythmia. Some studies also imply that flecainide acetate has the potential to regulate inflammatory-immune responses; however, its mechanism of action is contended. We determined the effects of flecainide acetate on lipopolysaccharide (LPS)-stimulated human neutrophils in vitro and on mortality in a septic rat model. Methods: Neutrophils from human blood were cultured with varying concentrations of flecainide acetate (1 μM, 10 μM, or 100 μM) with or without LPS (100 ng/ml). To assess neutrophil activation, the protein levels of tumor necrosis factor-alpha (TNF-α) and interleukin (IL)-6 and IL-8 were measured after a 4-hour culture period. To assess the intracellular signaling pathways, the levels of phosphorylation of p38 mitogen-activated protein kinase (p38), extracellular signal-regulated kinase (ERK) 1/2, and c-Jun N-terminal kinase (JNK) were measured after a 30-minute culture period, and the nuclear translocation of nuclear factor (NF)-κB was measured after a 1-hour culture period. Additionally, the survival rate was investigated in a rat sepsis model. Results: Flecainide acetate down-regulated the activation of proinflammatory cytokines, including TNF-α and IL-6 and IL-8, and intracellular signaling pathways including ERK 1/2 and NF-κB. Flecainide acetate also improved the survival rate in the rat sepsis model. Conclusions: Collectively, these findings indicate that flecainide acetate can improve survival in a rat sepsis model by attenuating LPS-induced neutrophil responses. We therefore suggest that flecainide acetate plays an important role in modulating inflammatoryimmune responses.

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