Magnesium sulfate mitigates acute lung injury in endotoxemia rats

Chun Yi Lee, Woan Ching Jan, Pei Shan Tsai, Chun Jen Huang

研究成果: 雜誌貢獻文章

30 引文 斯高帕斯(Scopus)

摘要

Background: Magnesium sulfate (MgSO4) possesses potent anti-inflammation capacity. We sought to elucidate the effects of MgSO4 on mitigating acute lung injury induced by endotoxemia. MgSO4 is an antagonist of the l-type calcium channels and the N-methyl-d-aspartate (NMDA) receptor. The roles of the l-type calcium channels and NMDA receptor in this regard were also elucidated. Methods: Ninety-six adult male rats were randomized to receive normal saline, MgSO4 (100 mg/kg), lipopolysaccharide (LPS), LPS plus MgSO4 (10, 50, or 100 mg/kg), LPS plus MgSO4 (100 mg/kg) plus the l-type calcium channel activator BAY-K8644, or LPS plus MgSO4 (100 mg/kg) plus exogenous NMDA (n = 12 in each group). Between-group differences in lung injury were evaluated. Results: Histologic findings, in concert with assays of leukocyte infiltration (polymorphonuclear leukocytes/alveoli ratio and myeloperoxidase activity) and lung water content (wet/dry weight ratio), confirmed that LPS induced acute lung injury. LPS also caused significant inflammatory response (increases in chemokine, cytokine, and prostaglandin E2 concentrations) and imposed significant oxidative stress (increases in nitric oxide and malondialdehyde concentrations) in rat lungs. MgSO4 at the dosages of 50 mg/kg and 100 mg/kg, but not at 10 mg/kg, significantly mitigated the acute lung injury, lung inflammatory response, and oxidative stress caused by endotoxemia. Moreover, the protective effects of MgSO4 were counteracted by BAY-K8644 and exogenous NMDA. MgSO4 mitigates lung inflammatory response, oxidative stress, and acute lung injury in endotoxemia rats in a dose-dependent manner. The mechanisms may involve antagonizing the l-type calcium channels and the NMDA receptor.

原文英語
頁(從 - 到)1177-1185
頁數9
期刊Journal of Trauma - Injury, Infection and Critical Care
70
發行號5
DOIs
出版狀態已發佈 - 五月 2011

ASJC Scopus subject areas

  • Surgery
  • Critical Care and Intensive Care Medicine

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