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He F, Yang J, Cheng X, Wang R, Qu H, Jiang H, Bai Y, Cao W. 8-methoxysmyrindiol from Gerbera piloselloides (L.) Cass. and its vasodilation effects on isolated rat mesenteric arteries. Fitoterapia 2019; 138:104299. [PMID: 31404616 DOI: 10.1016/j.fitote.2019.104299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/07/2019] [Accepted: 08/08/2019] [Indexed: 01/14/2023]
Abstract
Gerbera piloselloides (L.) Cass. (Compositae) possesses various biological effects. It is used as an oriental remedy for relieving cough and resolving phlegm. The present study is to investigate the vasodilation effects of Gerbera piloselloides on isolated rat mesenteric arteries (MAs) and the potential mechanism. Different organic extracts of Gerbera piloselloides were tested, and an HPLC-UV-FD-based analytical method was established to identify the active constituents. The principal components, namely, 8-MOP (8-methoxypsoralan) and 8-MSD (8-methoxysmyrindiol), were found to be predominant in the extracts of petroleum ether and dichloroform, which showed stronger vasodilation activities. 8-MSD was isolated from Gerbera piloselloides by silica gel column chromatography coupled with a Waters 2545 high throughput autopurification system, and its vasodilation effects were explored by an assay of tension on rat MA rings. The results suggest that 8-MSD induces vascular relaxation in rat MAs via an endothelium-dependent mechanism involving the Kir channel, which enables Ca2+ entry in the cell and activates production of NO. The present research indicates that 8-MSD may be therapeutically useful as an anti-hypertension agent and to potentially treat cardiovascular and gastrointestinal diseases.
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Affiliation(s)
- Fa He
- School of pharmacy, Daqing Campus of Harbin Medical University, No. 1, Xinyang Rd., Daqing 163319, China
| | - Jianfeng Yang
- School of pharmacy, Daqing Campus of Harbin Medical University, No. 1, Xinyang Rd., Daqing 163319, China
| | - Xiaohan Cheng
- School of pharmacy, Daqing Campus of Harbin Medical University, No. 1, Xinyang Rd., Daqing 163319, China
| | - Rui Wang
- School of pharmacy, Daqing Campus of Harbin Medical University, No. 1, Xinyang Rd., Daqing 163319, China
| | - Huicong Qu
- School of pharmacy, Daqing Campus of Harbin Medical University, No. 1, Xinyang Rd., Daqing 163319, China
| | - Hongchi Jiang
- The First Affiliated Hospital of Harbin Medical University, No.199, Dazhi Street, Nangang District, Harbin, Heilongjiang 150001, China.
| | - Yuhua Bai
- School of pharmacy, Daqing Campus of Harbin Medical University, No. 1, Xinyang Rd., Daqing 163319, China.
| | - Weiwei Cao
- School of pharmacy, Daqing Campus of Harbin Medical University, No. 1, Xinyang Rd., Daqing 163319, China.
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Abstract
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that has been intensively studied with respect to the toxicity of xenobiotics. However, its function in response to light has never been summarized. Here, we provide an overview of AhR activation by light with a focus on the role of tryptophan in light-induced AhR activation. We discuss the involvement of the AhR in different biological rhythms and speculate on the possible role of the AhR in UV-induced responses in skin. Furthermore, this review points out future research needs in this field.
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Affiliation(s)
- Agneta Rannug
- Karolinska Institute, Institute of Environmental Medicine, P.O. Box 210, S-171 77 Stockholm, Sweden.
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