实用医学杂志 ›› 2024, Vol. 40 ›› Issue (13): 1785-1790.doi: 10.3969/j.issn.1006-5725.2024.13.004

• 基础研究 • 上一篇    下一篇

大黄素上调Sirt2减轻脂多糖致RAW264.7细胞的氧化应激反应

龙淳,毕红英,杨昌珍,王家锴,唐艳,刘旭()   

  1. 贵州医科大学附属医院重症医学科 (贵阳 550004 )
  • 收稿日期:2023-12-25 出版日期:2024-07-10 发布日期:2024-07-09
  • 通讯作者: 刘旭 E-mail:liuxu@gmc.edu.cn
  • 基金资助:
    国家重点研发计划(2018YFC2001904);国家自然科学基金项目(81960357);国家自然科学基金培育项目(Gyfynsfc[2020]-26);贵州省科技计划项目(编号:黔科合基础[2020]1Y330,黔科合基础-ZK[2022]一般370,黔科合支撑[2021]一般090)

Emodin upregulates the Sirt2 to attenuate LPS-induced oxidative stress response in RAW264.7 cells

Chun LONG,Hongying BI,Changzhen YANG,Jiakai WANG,Yan TANG,Xu. LIU()   

  1. Department of Intensive Care Unit,the Affiliated Hospital of Guizhou Medical University,Guiyang 550004,China
  • Received:2023-12-25 Online:2024-07-10 Published:2024-07-09
  • Contact: Xu. LIU E-mail:liuxu@gmc.edu.cn

摘要:

目的 探究大黄素(Emodin)对脂多糖(LPS)刺激的小鼠巨噬细胞系(RAW264.7)氧化应激反应的影响及其机制。 方法 利用LPS、RAW264.7细胞和大黄素进行研究。设空白对照(Control)组、LPS(1 μg/mL)组、LPS(1 μg/mL) +大黄素(15 μmol/L预处理)组,在予LPS处理后6、12、18 h检测丙二醛(MDA)含量、细胞内活性氧(ROS)水平以及沉默信息调节因子2(Sirt2)表达水平等。使用Sirt2抑制剂AGK2(20 μmol/L)预处理RAW264.7细胞,仅在予LPS处理后6 h检测上述指标。 结果 与Control组相比,各时间点LPS组RAW264.7细胞的MDA含量、ROS水平及Sirt2 mRNA水平及蛋白表达水平均增加(P < 0.05)。LPS+大黄素组与LPS组相比,各时间点的RAW264.7细胞Sirt2 mRNA水平及蛋白水平均显著升高(P < 0.05),ROS水平均降低(P < 0.05);6、18 h的MDA含量均降低(P < 0.05)。与LPS+大黄素组相比,LPS +大黄素 + AGK2组Sirt2 mRNA及蛋白表达水平均降低,且MDA含量、ROS水平均增加(P < 0.05)。 结论 LPS刺激RAW264.7细胞后氧化应激反应显著增加,大黄素可通过Sirt2在LPS刺激RAW264.7细胞模型中抑制氧化应激反应。

关键词: 脓毒症, 巨噬细胞, 氧化应激, 大黄素, Sirt2

Abstract:

Objective The aim of this study was to investigate the impact and mechanisms of emodin on oxidative stress response in lipopolysaccharide (LPS)-induced murine mononuclear macrophages (RAW264.7). Methods Involved the use of LPS, RAW264.7 cells, and emodin. Experimental groups included a control group, LPS(1 μg/mL) group, and LPS(1 μg/mL) + emodin (15 μmmol/L) pretreatment group. Aldehyde malondialdehyde (MDA) content, intracellular reactive oxygen species (ROS) levels, and silent information regulator 2(Sirt2) expression were evaluated at 6, 12, and 18 hours after LPS exposure. Additionally, RAW264.7 cells were pretreated with Sirt2 inhibitor AGK2 (20 μmol/L) followed by LPS stimulation, and the above-mentioned parameters were assessed at 6 hours. Results Compared to the control group, MDA content, ROS levels, Sirt2 mRNA, and protein expression in RAW264.7 cells in the LPS group increased at all time points (all P < 0.05). At 6 and 18 hours, MDA content and ROS levels in RAW264.7 cells in the LPS + emodin group decreased significantly (all P < 0.05), while at 12 hours, ROS levels were lower in the LPS group compared to the LPS + emodin group (P < 0.05). Sirt2 mRNA and protein levels significantly increased at all time points (all P < 0.05) compared to the LPS group. In the LPS + emodin + AGK2 group, Sirt2 mRNA and protein levels decreased, and MDA content and ROS levels increased compared to the LPS + emodin group (all P < 0.05). Conclusion LPS-induced oxidative stress in RAW264.7 cells and emodin attenuate LPS-induced oxidative stress in RAW264.7 cells through Sirt2.

Key words: sepsis, macrophages, oxidative stress, emodin, Sirt2

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