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Hu LJ, Qi YY, Chen KJ, Yang C, Wu HY, Li GP. Vasodilatory effect and structural-activity relationship of a group of iridoid glucosides from Phlomis likiangensis. Fitoterapia 2019; 139:104365. [PMID: 31647954 DOI: 10.1016/j.fitote.2019.104365] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/23/2019] [Accepted: 09/28/2019] [Indexed: 11/26/2022]
Abstract
As a folk medicine, Phlomis likiangensis is traditionally used in China to activate collaterals and protect cardiovascular system. We hypothesized that the beneficial effects of Phlomis likiangensis may be related to vasodilatation. In the present study, twelve known iridoid glucosides (1-12) were isolated from Phlomis likiangensis. The vasodilatory effects and the underlying mechanisms of the main components (iridoid glucosides) of Phlomis likiangensis on rat aortic rings were investigated. The result showed that iridoid glucosides significantly increased the vasodilatation in rat aortic rings, which was abolished by removing the endothelium of the vessels or by eliminating the generation of nitric oxide. Finally, the structure-activity relationship of compounds 1-12 was also speculated. Our findings provide the first evidence that the iridoid glucosides of Phlomis likiangensis may be the pharmacodynamic basis for its traditional efficacy.
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Affiliation(s)
- Li-Jiao Hu
- Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming 650500, China; School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China
| | - Yan-Yan Qi
- Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming 650500, China; School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China
| | - Ke-Jin Chen
- Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming 650500, China; School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China
| | - Cui Yang
- Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming 650500, China; School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China
| | - Hai-Yan Wu
- Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming 650500, China; School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China.
| | - Gan-Peng Li
- Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming 650500, China; School of Ethnic Medicine, Yunnan Minzu University, Kunming 650500, China.
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