白黎芦醇对脂多糖诱导大鼠腹腔巨噬细胞活化的抑制作用

目的探讨脂多糖（LPS）诱导的大鼠腹腔巨噬细胞（PMA）活性变化及白黎芦醇（RESV）对它的抑制作用。方法分离大鼠PMA，随机分为对照组、LPS组和RESVI-V组。培养24h后，分别用免疫组化方法检测核网子-kB（NF-kB）活性，酶联免疫吸附法和硝酸还原法检测细胞上清液中肿瘤坏死因子-α（TNF-α）、白细胞介素-1（IL-1）和一氧化氮（NO）水平。结果对照组仅有少量NF-kB的活化。LPS诱导后，PMA出现大量NF-kB的活化，继而细胞上清液中TNF-α、IL-1和NO的水平显著升高。RESV治疗后NF-kB的活性较PMA组逐渐降低，具有剂量依赖性，并且相应的细胞上清液中TNF-α、IL-1和NO水平明显降低。结论RESV可以抑制PMA中NF-kB的活化，从而减少TNF-α、IL-1和NO的过度分泌。

Effect of resveratrol on lipopolysaccharide-induced activation of rat peritoneal macrophages

OBJECTIVE: To investigate nuclear factor kappa B (NF-kappaB) activation induced by lipopolysaccharide (LPS) in rat peritoneal macrophages (PMAs) and the inhibitory effect of resveratrol on NF-kappaB activation. METHODS: PMAS from normal SD rats were randomly divided into 7 groups, including a control group, a LPS group and 5 resveratrol groups (I-V). PMAs of the control group were incubated in DMEM, and those in LPS group in DMEM containing LPS (10 microg/ml). PMAS of resveratrol groups I-V were incubated in DMEM containing LPS (10 microg/ml) and different concentrations of resveratrol. After 24 h of incubation, NF-kappaB activation in the PMAs was determined, and the expression levels of tumor necrosis factor alpha (TNF-alpha), interleukin-1 (IL-1) and nitric oxide (NO) in the culture medium were measured. RESULTS: Exposure to LPS resulted in an excessive enhancement of cytokine and NO expressions in the PMAs. Resveratrol at 1.25-10 microg/ml produced a dose- dependent inhibition of cytokine and NO expressions and on NF-kappaB activation in LPS-stimulated PMAs. CONCLUSION: Resveratrol can inhibit LPS-induced NF-kappaB activation in rat PMAs and subsequently suppress the expressions of TNF-alpha, IL-1 and NO.