betway必威登陆网址 (betway.com )学报››2022,Vol. 43››Issue (5): 321-326.DOI:10.3969/j.issn.2097-0005.2022.05.001

• 基础研究 •下一篇

大蒜素减轻氧化低密度脂蛋白诱导的巨噬细胞焦亡

潘天琦1(), 闫京锐1(), 姚俐冰2, 杨一帆3, 田华4,5(), 姚树桐1()

  1. 1.betway必威登陆网址 (betway.com )临床与基础医学院 山东, 泰安, 271000
    2.泰安第一中学,山东, 泰安, 271000
    3.betway必威登陆网址 (betway.com )药学院 山东, 泰安, 271000
    4.betway必威登陆网址 (betway.com )动脉粥样硬化研究所,山东, 泰安, 271000
    5.山东中医药大学中医学院,山东, 济南, 250355
  • 收稿日期:2021-09-08出版日期:2022-05-25发布日期:2022-06-09
  • 通讯作者:田华,姚树桐
  • 作者简介:潘天琦,硕士,研究方向:脂质代谢与动脉粥样硬化防治,E-mail:787849575@qq.com
    闫京锐,betway必威登陆网址 2017级临床与基础医学院本科,E-mail:yanjingrui99@163.com第一联系人:潘天琦、闫京锐为共同第一作者。
  • 基金资助:
    国家自然科学基金(81800394);省大学生创新创业训练计划(S201910439106)

Allicin attenuates oxidized low density lipoprotein-induced macrophage pyroptosis

Tianqi PAN1(), Jingrui YAN1(), Libing YAO2, Yifan YANG3, Hua TIAN4,5(), Shutong YAO1()

  1. 1.College of Clinical and Basic Medicine, Shandong, Taian, 271000
    2.Taian No. 1 Middle School in Shandong Province Shandong, Taian, 271000 China
    3.College of Clinical and Basic Medicine College of Pharmacy Shandong, Taian, 271000
    4.Institute of Atherosclerosis,Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000,China
    5.Middle School in Shandong Province, Taian Jinan, 271000,China,
  • Received:2021-09-08Online:2022-05-25Published:2022-06-09
  • Contact:Hua TIAN,Shutong YAO

摘要: 目的

研究大蒜素对氧化低密度脂蛋白(oxidized low density lipoproein,ox-LDL)触发的巨噬细胞焦亡的抑制作用,并探究其可能的分子机制。

方法

RAW 264.7巨噬细胞,给予大蒜素(12.5、25、50和100 mg/L)和二亚苯基碘鎓(DPI)5 μmol/L预处理1 h,再加入100 mg/L ox-LDL继续孵育24 h。分别采用TUNEL、MTT、ELISA法和相应的试剂盒检测细胞死亡情况和细胞活力、培养基IL-1β和IL-18浓度以及培养基乳酸脱氢酶(lactate dehydrogenase,LDH)和细胞内caspase-1、超氧化物歧化酶(superoxide dismutase,SOD)活性、活性氧(reactive oxygen species,ROS)和丙二醛(malondialdehyde,MDA)水平。随后,应用Western blotting法检测核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)的表达变化。

结果

和DPI氧化应激抑制剂相似,大蒜素可以显著抑制ox-LDL触发的巨噬细胞焦亡作用,增加细胞活力,减少ox-LDL刺激引起的TUNEL阳性细胞率以及巨噬细胞LDH漏出,并可减少白介素?1β(interleukin?1β,IL?1β)和白介素?18(interleukin?18,IL?18)的分泌,且呈浓度依赖性;与DPI相似,大蒜素能够显著抑制ox-LDL触发的NLRP3上调和caspase-1活化,并明显抑制ox-LDL介导的氧化应激反应,表现为SOD活性增加、ROS和MDA生成减少。

结论

大蒜素可减轻ox-LDL 所触发的巨噬细胞焦亡,该作用主要与减弱氧化应激反应从而抑制NLRP3-caspase-1信号通路的活化有关。

关键词:大蒜素,氧化低密度脂蛋白,氧化应激,天冬半胱氨酸酶-1,巨噬细胞,焦亡

Abstract: Objective

To investigate the inhibitory effect of allicin on oxidized low density lipoprotein (ox-LDL)-triggered macrophage pyroptosis and the underlying molecular mechanisms.

Methods

RAW264.7 macrophages were subjected to treatment with allicin (12.5, 25, 50 and 100 mg/L) and diphenyleneiodonium (DPI, 5 μmol/L) initially for 1 h and later for 24 h using 100 mg/L ox-LDL. Cell death degree and cell viability were detected by TUNEL detection kit and MTT assay, respectively. The levels of interleukin-1β (IL-1β) and IL-18 in media were measured using ELISA kits. Lactic dehydrogenase (LDH) activity in media, the activities of caspase-1, superoxide dismutase (SOD), and the levels of reactive oxygen species (ROS), malonaldehyde (MDA) in cells were evaluated by the corresponding detection kits. The nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) protein expression was measured using Western blotting.

Results

Similar to DPI (an oxidative stress inhibitor), allicin inhibited ox-LDL-triggered macrophage pyroptosis in a dose-dependent manner, as evaluated by the increase in cell viability and the decrease in LDH release, TUNEL staining positive cells and IL-1β, IL-18 secretion. Additionally, like DPI, allicin suppressed obviously the upregulation of NLRP3 and caspase-1 activation triggered by ox-LDL. Furthermore, allicin significantly suppressed ox-LDL-induced oxidative stress, as assessed by the increased activity of SOD and the decreased levels of ROS and MDA.

Conclusion

Allicin can suppress ox-LDL-triggered macrophage pyroptosis at least in part by suppressing oxidative stress and attenuating the activation of NLRP3-caspase-1 pathway.

Key words:allicin,oxidized low-density lipoprotein,oxidative stress,caspase-1,macrophage,pyroptosis