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Effects of cimetidine and N-acetylcysteine on paraquat-induced acute lung injury in rats: a preliminary study

机译:西咪替丁和N-乙酰半胱氨酸对百草枯致大鼠急性肺损伤的作用:初步研究

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Lung injury in rats challenged with paraquat at 20 mg kg(-1) body weight was histopathologically evident by inflammation, hemorrhage, and vascular congestion. Increased levels of reactive oxygen species and lipid peroxidation, decreased glutathione content, and lower tissue antioxidant capacity was found. The effects of N-acetylcysteine and cimetidine, a well-known potent inhibitor for organic cation transport, were examined. Lung injury was attenuated by N-acetylcysteine but not by cimetidine. The findings are consistent with the assumption that beneficial effects of N-acetylcysteine administration in paraquat-challenged animals might be linked to its ability for preserving the cellular redox environment and preventing oxidative stress, while cimetidine might even hasten paraquat-induced lung injury. On the other hand, the effects of cimetidine on paraquat-induced lung injury underline the importance of future studies on the role of transporters in this complication.
机译:炎症,出血和血管充血在组织病理学上明显证实了百草枯对体重为20 mg kg(-1)的大鼠的肺损伤。发现增加了活性氧水平和脂质过氧化,降低了谷胱甘肽含量,降低了组织的抗氧化能力。研究了N-乙酰半胱氨酸和西咪替丁(一种著名的有机阳离子转运抑制剂)的作用。 N-乙酰半胱氨酸可减轻肺损伤,而西咪替丁则不会。该发现与以下假设一致:N-乙酰半胱氨酸在百草枯激发动物中的有益作用可能与其保持细胞氧化还原环境和防止氧化应激的能力有关,而西咪替丁甚至可能加速百草枯引起的肺损伤。另一方面,西咪替丁对百草枯引起的肺损伤的影响强调了今后研究转运蛋白在这种并发症中作用的重要性。

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