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Protective effect of resveratrol in endotoxemia-induced acute phase response in rats

机译:白藜芦醇对内毒素血症大鼠急性期反应的保护作用

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Lipopolysaccharide (LPS), a glycolipid component of the cell wall of gram-negative bacteria can elicit a systemic inflammatory process leading to septic shock and death. Acute phase response is characterized by fever, leucocytosis, thrombocytopenia, altered metabolic responses and redox balance by inducing excessive reactive oxygen species (ROS) generation. Resveratrol (trans-3,5,4′ trihydroxystilbene) is a natural polyphenol exhibiting antioxidant and anti-inflammatory properties. We investigated the protective effect of resveratrol on endotoxemia-induced acute phase response in rats. When acutely administered by i.p. route, resveratrol (40 mg/kg b.w.) counteracted the effect of a single injection of LPS (4 mg/kg b.w.) which induced fever, a decrease in white blood cells (WBC) and platelets (PLT) counts. When i.p. administered during 7 days at 20 mg/kg per day (subacute treatment), resveratrol abrogated LPS-induced erythrocytes lipoperoxidation and catalase (CAT) activity depression to control levels. In the plasma compartment, LPS increased malondialdehyde (MDA) via nitric monoxide (NO) elevation and decreased iron level. All these deleterious LPS effects were reversed by a subacute resveratrol pre-treatment via a NO independent way. Resveratrol exhibited potent protective effect on LPS-induced acute phase response in rats.
机译:脂多糖(LPS)是革兰氏阴性细菌细胞壁的糖脂成分,可引起全身性炎症过程,导致败血性休克和死亡。急性期反应的特征是发烧,白细胞增多,血小板减少,代谢反应改变和氧化还原平衡,原因是诱导产生过多的活性氧(ROS)。白藜芦醇(反式3,5,4'三羟基sti)是一种天然多酚,具有抗氧化和抗炎特性。我们调查了白藜芦醇对内毒素血症诱导的大鼠急性期反应的保护作用。由ip急性给药时。途径中,白藜芦醇(40 mg / kg b.w.)抵消了单次注射LPS(4 mg / kg b.w.)引起的发烧,白细胞(WBC)和血小板(PLT)计数减少的影响。当i.p.以每天20 mg / kg的剂量(亚急性治疗)连续7天服用白藜芦醇,可消除LPS诱导的红细胞脂过氧化和过氧化氢酶(CAT)活性下降,以控制水平。在血浆室中,LPS通过一氧化氮(NO)升高而增加了丙二醛(MDA),并降低了铁水平。通过亚急性白藜芦醇预处理,通过不依赖NO的方式逆转了所有这些有害的LPS效应。白藜芦醇对LPS诱导的大鼠急性期反应显示出有效的保护作用。

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