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中国临床药理学与治疗学 ›› 2018, Vol. 23 ›› Issue (1): 8-12.doi: 10.12092/j.issn.1009-2501.2018.01.002

• 基础研究 • 上一篇    下一篇

柠檬苦素对脂多糖致小鼠急性肺损伤的作用

王 棣1,张欢欢2,方 杰2,钟宇森2, 余陈欢2   

  1. 1杭州市江干区人民医院内科,杭州 310016,浙江; 2浙江省医学科学院,浙江省实验动物与安全性研究重点实验室,杭州 310013,浙江
  • 收稿日期:2017-01-16 修回日期:2017-03-29 出版日期:2018-01-26 发布日期:2018-02-07
  • 通讯作者: 余陈欢,男,博士,副研究员,硕士生导师,研究方向:抗炎抗肿瘤药理学。 Tel: 0571-88215491E-mail: yuchenhuan2002@163.com
  • 作者简介:王棣,男,本科,主治中医师,研究方向:呼吸系统疾病与中医药治疗。 Tel: 0571-86079117 E-mail: jellycook13925809@163.com
  • 基金资助:

    国家自然科学基金项目(81473339,81673583);浙江省科技厅院所专项(2014F10033)

Effects of limoninon on LPS-induced acute lung injury in mice

WANG Di 1, ZHANG Huanhuan 2, FANG Jie 2, ZHONG Yushen 2, YU Chenhuan2   

  1. 1 Jianggan People's Hospital of Hangzhou, Department of Internal Medicine, Hangzhou 310016, Zhejiang, China; 2 Zhejiang Key Laboratory of Experimental Animal and Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310013, Zhejiang, China
  • Received:2017-01-16 Revised:2017-03-29 Online:2018-01-26 Published:2018-02-07

摘要:

目的: 探讨柠檬苦素(LM)对脂多糖(LPS)致小鼠急性肺损伤的影响。方法: 40只ICR雄性小鼠,按体质量随机分为4组:正常组、模型组、地塞米松(Dex)给药组和LM给药组,每组10只。Dex和LM均在滴注LPS前2 h分别小鼠腹腔注射10 mg/kg给药,之后除正常组小鼠只给予腹腔注射等体积的生理盐水外,其余小鼠气管滴注致死量的5 mg/kg LPS。LPS注射6 h后,处死小鼠,解剖小鼠取肺脏,计算小鼠肺指数、湿干比值。采用苏木素-伊红(HE)染色观察肺组织形态。采用ELISA法检测小鼠血清中TNFα、IL1β和IL6含量;比色法检测血清髓过氧化物酶(MPO)含量。实时定量PCR检测TNF-α、IL-1β和IL-6 mRNA表达情况。Western blot检测TLR4和NF-κB p65蛋白表达。结果: 与正常组比较,模型组小鼠肺指数和湿干比值明显升高,肺组织间质炎性细胞浸润,伴明显的肺泡充血、水肿,血清MPO、TNF-α、IL-1β和IL-6含量及其肺组织mRNA表达量均明显升高(P<0.01);与模型组比较,LM给药组小鼠肺指数和湿干比值明显降低,肺组织病理状态明显改善,血清TNF-α、IL-1β和IL-6水平及肺组织TNFα mRNA、IL-1β mRNA、IL-6 mRNA、TLR4和NF-κB p65蛋白表达量均明显降低(P<0.01)。结论: LM可通过调控TLR4/NF-κB通路抑制炎症因子的表达从而改善LPS诱导的小鼠肺组织损伤。

关键词: 柠檬苦素, 抗炎作用, 脂多糖, 急性肺损伤

Abstract:

AIM: To investigate the effects of limonin (LM) on lipopolysaccharides (LPS)-induced acute lung injury (ALI) in mice. METHODS: Forty ICR male mice were divided randomly by weight into 4 groups: normal group, model group, dexamethasone (Dex)-treated group and LM-treated group. Each group had ten mice. Dex and LM were intraperitoneally injected at the dose of 10 mg/kg, respectively. Two hours after drug administration, except the mice in normal group treated with same vehicle, others were intracheally injected with LPS (5 mg/kg). Six hours after LPS challenge, mice were sacrificed and lung tissues were obtained for calculating the pulmonary index and wet/dry mass (W/D) ratio. The sections were stained with hematoxylin and eosin (HE) for histological analysis. The levels of TNF-alfa, IL-1beta, and IL-6 in serum were determined by ELISA. Myeloperoxidase (MPO) in serum were determined by chromatometry. The mRNA expressions of TNF-alfa, IL-1beta and IL-6 were determined by RT-PCR while TLR4 and NF-kB p65 protein by Western blot analysis. RESULTS: Compared with normal group, mice in model group had obvious increase of lung indexes and W/D ratios, which were accompanied by marked inflammatory cell infiltration, alveolar congestion and edema in lung; the levels of TNF-alfa, IL-1beta, IL-6 and MPO in serum as well as their mRNA expressions in the lung of ALI mice were also increased (P<0.01). Compared with model group, lung indexes and W/D ratios were decreased in LM-treated group while histological changes were improved; the levels of TNF-alfa, IL-1beta, and IL-6 in serum (P<0.01) and their mRNA expressions, and the expressions of TLR4 and NF-kB p65 protein in lung tissues were also significantly decreased (P<0.01). CONCLUSION: LM protects against LPS-induced ALI via regulating TLR4/NF-kB pathway and inhibiting expression of inflammatory cytokines in mice.

Key words: limonin, anti-inflammatory effect, lipopolysaccharides, acute lung injury

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