Hepa1c1c-7 Cell에서 리포폴리사카라이드로 유도된 염증성 매개인자 생산에 있어서 코르티코스테론 전처리 효과

Effect of Corticosterone Pretreatment on the Production of LPS-Induced Inflammatory Mediators in Hepa1c1c-7 Cells

Endotoxemia induces production of inflammatory mediators and acute phase proteins, leading to multiorgan injury and systemic inflammation. Hypothalamic-pituitary-adrenal (HPA) axis activation and glucocorticoids (GCs) release modify endotoxemia-induced inflammatory responses. In the present study, we investigated whether pre-exposure of GCs influences endotoxin-induced production of inflammatory mediators in hepatocytes. Hepa1c1c-7 cells were pretreated with low concentrations of corticosterone for 24 h and then cultured without corticosterone in the presence or absence of LPS. Our results demonstrated that LPS alone significantly enhanced production of IL-6 and CRP but reduced vascular endothelial growth factor (VEGF) compared to controls. Combination of corticosterone pretreatment and LPS significantly upregulated production of IL-6, IL-1β, and VEGF but downregulated CRP compared to those in LPS alone. These findings suggest that in low concentration of corticosterone-preexposed hepatocytes, endotoxemia may induce upregulation of IL-6, IL-1β, VEGF and but downregulation of CRP.