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Hai P, Rao K, Jiang N, Liu D, Wang R, Gao Y, Liu X, Deng S, Zhou Y, Chen X, Li X, Li R. Structure elucidation, biogenesis, and bioactivities of acylphloroglucinol-derived meroterpenoid enantiomers from Dryopteris crassirhizoma. Bioorg Chem 2021; 119:105567. [PMID: 34971945 DOI: 10.1016/j.bioorg.2021.105567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/27/2021] [Accepted: 12/13/2021] [Indexed: 12/13/2022]
Abstract
Twenty-four racemic acylphloroglucinol meroterpenoids including eighteen unusual stuctures (3 ∼ 10, 13, 14, and 17 ∼ 24), and a major component filixic acid ABA (25), were isolated from Dryopteris crassirhizoma. Structurally, the dimeric acylphloroglucinol derivatives possess unprecedented skeletons of mixed acylphloroglucinol and sesquiterpene biosynthetic origin. The stereochemistries of six reported meroterpenoids with undefined chiral centers were reassigned. Two intriguing methods by analyzing a) the regularity of chemical shift variation of protons and carbons around the stereogenic centers, and b) pyridine-induced deshielding effect of hydroxy groups, to discriminate relative configurations of flexible long-chain alcohol with chiral centers separated by three or seven covalent bonds, were successfully applied. A non-enzymatic biosynthesis of 1 ∼ 24 was assumed based on a rare single-crystal cluster formed with two diastereomeric enantiomer pairs (±1/±2) and chiral HPLC analyses. Meroterpenoids 13 and 14 showed obvious inhibitory effects on NO production in LPS-induced RAW264.7, and suppressed the expression of iNOS, COX-2, IL-1β, and IL-18. Their anti-inflammatory activity was closely related to the inhibition of the formation and function of inflammasomes. Additionally, the known 25 showed antiviral efficacy against the influenza viruse A/Puerto Rico/8/1934 (H1N1).
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Affiliation(s)
- Ping Hai
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Kairui Rao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Na Jiang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Dan Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Ruirui Wang
- School of Pharmaceutical Sciences, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Yuan Gao
- Faculty of Materials and Chemical Engineering, Yibin University, Yibin 644000, China
| | - Xiaocong Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Sihao Deng
- Faculty of Materials and Chemical Engineering, Yibin University, Yibin 644000, China
| | - Yu Zhou
- Faculty of Materials and Chemical Engineering, Yibin University, Yibin 644000, China
| | - Xuanqin Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Xiaonian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Rongtao Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
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Floris S, Fais A, Rosa A, Piras A, Marzouki H, Medda R, González-Paramás AM, Kumar A, Santos-Buelga C, Era B. Phytochemical composition and the cholinesterase and xanthine oxidase inhibitory properties of seed extracts from the Washingtonia filifera palm fruit. RSC Adv 2019; 9:21278-21287. [PMID: 35521327 PMCID: PMC9066185 DOI: 10.1039/c9ra02928a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 06/25/2019] [Indexed: 11/21/2022] Open
Abstract
The chemical composition and biological properties of palm Washingtonia filifera (Lindl.) H. Wendl. seeds are seldom studied.
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Affiliation(s)
- Sonia Floris
- Department of Life and Environmental Sciences
- University of Cagliari
- Monserrato
- Italy
| | - Antonella Fais
- Department of Life and Environmental Sciences
- University of Cagliari
- Monserrato
- Italy
| | - Antonella Rosa
- Department of Biomedical Sciences
- University of Cagliari
- Monserrato
- Italy
| | - Alessandra Piras
- Department of Chemical and Geological Sciences
- University of Cagliari
- Monserrato
- Italy
| | - Hanen Marzouki
- Laboratory of Transmissible Diseases and Biologically Active Substances
- Faculty of Pharmacy
- University of Monastir
- Tunisia
| | - Rosaria Medda
- Department of Life and Environmental Sciences
- University of Cagliari
- Monserrato
- Italy
| | | | - Amit Kumar
- Department of Electrical and Electronic Engineering
- University of Cagliari
- Cagliari
- Italy
| | | | - Benedetta Era
- Department of Life and Environmental Sciences
- University of Cagliari
- Monserrato
- Italy
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