Chemical profile and anti-inflammatory activity of total flavonoids from Glycyrrhiza uralensis Fisch.

Authors

  • Jing Chen School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China.| Ningxia Engineering and Technology Research Center for Modernization of Hui Medicine, Yinchuan 750004, China.
  • Jingxia Liu School of traditional Chinese medicine, Ningxia Medical University, Yinchuan 750004, China.
  • Lei Yin School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China.
  • Lin Dong School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China.
  • Meifeng Liu School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology
  • Weihong Sun Depterment of General Hospital of Ningxia Medical University
  • Xiuli Wu Ningxia Engineering and Technology Research Center for Modernization of Hui Medicine, Yinchuan 750004, China | School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China. bNingxia Engineering and Technology Research Center for Modernization of Hui Medicine, Yinchuan 750004, China
  • xueyan fu School of Pharmacy, Ningxia Medical University, Ningxia Engineering and Technology Research Center for Modernization of Hui Medicine, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education
  • Yuanbin Zhang School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China.
  • Zhiheng Shu School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China.
Abstract:

Glycyrrhiza uralensis Fisch. (G. uralensis) is one of the most widely used herbal medicines for the treatment of cough, spasms, pain, inflammation and low immunity This study was designed to enrich total flavonoids (TFF) from G. uralensis and investigate the anti-inflammatory activity of TFF. The anti-inflammatory activity was evaluated by inflammatory models of dimethylbenzene (DMB)-induced ear vasodilatation in mice and carrageenan-induced paw edema in rats. The chemical profiling of TFF was identified by HPLC and colorimetric assay. The TFF mainly contained liquiritin apioside, liquiritin, isoliquiritin apioside, liquiritigenin and isoliquiritigenin without glycyrrhizic acid. Treatment with TFF showed significant anti-inflammatory activities at two models. In the rat paws with carrageenan, TFF at the dose of 500 mg/kg significantly inhibited the edema formation at 1 to 5 h compared to control group. But TFF at dose of 250 and 125 mg/kg only significantly decreased the edema at 2 to 5 h. Application of TFF (500 and 250 mg/kg) significantly reduced the expression of IL-1β and iNOS. TFF at all doses noticeably declined levels of NO and MDA into the site of inflammation, while only i. g. TFF at a dose of 500 mg/kg significantly decreased TNF-α levels in the carrageenan-injected paws. In addition, the increase of SOD level was showed by TFF at all doses. Our results revealed that TFF exhibited significant anti-inflammatory activity in acute inflammatory models. The activity maybe mainly contributed by liquiritin apioside, liquiritin, isoliquiritin apioside, liquiritigenin and isoliquiritigenin.

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Journal title

volume 17  issue 2

pages  726- 734

publication date 2018-04-01

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