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中国药学(英文版) ›› 2016, Vol. 25 ›› Issue (3): 178-188.DOI: 10.5246/jcps.2016.03.021

• 【研究论文】 • 上一篇    下一篇

刺芒柄花素通过诱导Nrf2表达缓解DSS诱导的小鼠溃疡性结肠炎

杨倩1,2, 陈刚2, 杨洋2, 蔡雪婷2, 庞中化2, 胡春萍2, 张双全1*, 曹鹏2*   

  1. 1. 南京师范大学 生命科学学院 分子生物技术与医学实验室, 江苏 南京 210046
    2. 江苏省中医药研究院  细胞与分子生物学实验室, 江苏 南京 210028
  • 收稿日期:2015-10-23 修回日期:2015-12-04 出版日期:2016-03-29 发布日期:2016-01-11
  • 通讯作者: Tel./Fax: +86-25-85891053, Tel./Fax: +86-25-85608666, E-mail: zhangshuangquan@njnu.edu.cn, pcao79@yahoo.com
  • 基金资助:
    National Natural Science Foundation of China (Grant No. 81274150, 81573680 and 81470179).

Formononetin ameliorates DSS-induced ulcerative colitis in mice through induction of Nrf2 in colons

Qian Yang1,2, Gang Chen2, Yang Yang2, Xueting Cai2, Zhonghua Pang2, Chunping Hu2, Shuangquan Zhang1*, Peng Cao2*   

  1. 1. Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, Life Sciences College, Nanjing Normal University, Nanjing 210046, China
    2. Laboratory of Cellular and Molecular Biology, Jiangsu Province Institute of Traditional Chinese Medicine, Nanjing 210028, Jiangsu, China
  • Received:2015-10-23 Revised:2015-12-04 Online:2016-03-29 Published:2016-01-11
  • Contact: Tel./Fax: +86-25-85891053, Tel./Fax: +86-25-85608666, E-mail: zhangshuangquan@njnu.edu.cn, pcao79@yahoo.com
  • Supported by:
    National Natural Science Foundation of China (Grant No. 81274150, 81573680 and 81470179).

摘要:

异黄酮刺芒柄花素是从红车轴草中提取的一种主要的活性成分。红车轴草是一种具有抗炎和抗癌功能的药用植物。在本研究中, 我们旨在研究刺芒柄花素对DSS诱导的急性和慢性小鼠溃疡性结肠炎的作用。研究结果发现刺芒柄花素(25, 50 mg/kg) 可以明显地减弱DSS引起的体重下降, 疾病活动指数评分, 肠度缩短和组织损伤。进一步研究发现, 在给予刺芒柄花素的保护组中, 肿瘤坏死因子(TNF-α), 白介素-6(IL-6) 和环氧合酶(COX-2)的含量都会明显降低; 结肠组织中具有代表性的氧化压力参数, 包括超氧化物歧化酶和髓过氧化物酶的活性, 以及丙二醛和8-羟基鸟嘌呤的含量明显得到改善;同时, 研究中还发现刺芒柄花素保护组中Nrf2表达量明显升高, 但是Nrf2基因敲除小鼠慢性溃疡性结肠炎症状没有得到缓解。综上所述, 我们推断刺芒柄花素可以通过激活Nrf2的表达保护溃疡性结肠炎的发生。结果证明刺芒柄花素可能对治疗溃疡性结肠炎具有潜在的作用价值。

关键词: Nrf2, 溃疡性结肠炎, 异黄酮刺芒柄花素, 炎症因子, 氧化应激

Abstract:

Isoflavone formononetin (FN) is a main active component of red clover (Trifolium pratense L.), a medicinal plant possessing antitumorigenic and antioxidant properties. In the present study, we aimed to examine the effect of FN on dextran sulfate sodium (DSS)-induced ulcerative colitis (UC) in mice. The results showed that FN (25, 50 mg/kg) markedly attenuated the loss of body weight, the disease activity index (DAI), shortening of colon length and tissue injury induced by DSS treatment. In addition, the levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and cyclooxygenase-2 (COX-2) were also significantlyreduced in FN treatment group compared with the DSS group. Moreover, several representative oxidative stress parameters in colorectum, including superoxide dismutase (SOD), methane dicarboxylic aldehyde (MDA), myeloperoxidase (MPO) and 8-oxoguanine, were markedly ameliorated. In this study, we also found that the expression of Nrf2 was increased by FN treatment.However, symptoms of UC were not ameliorated in Nrf2 knockout mice. Taken together, FN could prevent the development of UC through activating of Nrf2 axis, and the protective effect was Nrf2 dependent. Our results demonstrated that FN might be a potential therapeutic agent in the treatment of UC.

Key words: Nrf2, Ulcerative colitis, Isoflavone formononetin, Flammatory cytokines, Oxidative stress

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