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Deng Y, Lu GH, Xu JY, Luo Q, Du QF. Discovery, biosynthesis, organic synthesis, and bioactivities of meroterpenoids from Rhododendron species. PHYTOCHEMISTRY 2024; 222:114089. [PMID: 38626831 DOI: 10.1016/j.phytochem.2024.114089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/30/2024] [Accepted: 04/07/2024] [Indexed: 04/20/2024]
Abstract
Meroterpenoids discovered in Rhododendrons species possess unique chemical structures and biological activities and are expected to become new drug targets for Alzheimer's disease, metabolic disorders, and chronic kidney disease, and these compounds have attracted increasing attention in recent years. In this study, Rhododendron meroterpenoids and their structures, classifications, racemate distribution, biosynthetic pathways, chemical synthesis, and bioactivities are reviewed prior to 2023.
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Affiliation(s)
- Yi Deng
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Gui-Hu Lu
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Jing-Yang Xu
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Qi Luo
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China; Guangdong Basic Research Center of Excellence for Integrated Traditional and Western Medicine for Qingzhi Diseases, Southern Medical University, Guangzhou, 510515, China.
| | - Qing-Feng Du
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China; Guangdong Basic Research Center of Excellence for Integrated Traditional and Western Medicine for Qingzhi Diseases, Southern Medical University, Guangzhou, 510515, China; Hospital of Integrated Traditional Chinese and Western Medicine, Southern Medical University, Guangzhou, 510315, China.
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Liang Q, Hu JX, Zhang XM, Xu WH. Traditional uses, phytochemistry, pharmacology, toxicology, and quality control of Rhododendron dauricum L. leaves: A comprehensive review. JOURNAL OF ETHNOPHARMACOLOGY 2023; 305:116085. [PMID: 36584919 DOI: 10.1016/j.jep.2022.116085] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/08/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rhododendron dauricum L. is a traditional herb mainly distributed in the northeast China, Mongolia, Korea Peninsula, and Russia Far East. The dried leaves of Rhododendron dauricum L. (LRD), generally known "Man Shan Hong" have been traditionally applied as folk medicines to treat fever, copious phlegm, asthma, acute and chronic bronchitis, sore throat, dysentery, diabetes mellitus, cancer, and hypertension. To date, no comprehensive review on R. dauricum leaves has been published. AIM OF THE STUDY Recent progresses in traditional use, phytochemistry, pharmacology, toxicology, and quality control of R. dauricum leaves are systematically presented and critically evaluated in order to provide scientifical basis for its reasonable utilization and further study. MATERIALS AND METHODS All information about R. dauricum leaves were retrieved from internet scientific databases including Sci-Finder, Web of Science, PubMed, CNKI, Google Scholar, Elsevier, Wiley, ACS publications, SpringerLink, and the Chinese Pharmacopoeia between 1970 and 2022. Plant names were validated by "The Plant List" (http://www.theplantlist.org/). RESULTS So far, 114 structurally diverse compounds have been isolated and identified from LRD, mainly including flavonoids, diterpenoids, triterpenoids, meroterpenoids, phenols, and 54 volatile components were identified from the essential oils of LRD. Among these, flavonoids are considered as characteristic components and major bioactive phytochemicals. The crude extracts and compounds from LRD have been reported to possess broad pharmacological effects including antitussive and expectorant, anti-inflammatory, anti-HIV, antibacterial, and cytotoxic effects, etc. CONCLUSIONS: As a traditional herb medicine, LRD have been used popularly. On the one hand, traditional uses of LRD provide valuable directions for current research; on the other hand, modern phytochemical and pharmacological studies verify the traditional uses to make its reasonable utilization. However, several defects such as active components determination, in vivo and clinical pharmacological evaluation, toxicology assessment, and quality control of LRD need further study.
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Affiliation(s)
- Qian Liang
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, School of Forestry, Southwest Forestry University, Kunming, 650224, PR China
| | - Jia-Xin Hu
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, School of Forestry, Southwest Forestry University, Kunming, 650224, PR China
| | - Xin-Min Zhang
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming, 650224, PR China
| | - Wen-Hui Xu
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, School of Forestry, Southwest Forestry University, Kunming, 650224, PR China; Shaoxing Academy of Biomedicine of Zhejiang Sci-Tech University, Shaoxing, 312000, PR China.
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Kubo K, Watanabe H, Kumeta H, Aizawa T, Seki C, Nakano H, Tokuraku K, Uwai K. Chemical analysis of amyloid β aggregation inhibitors derived from Geranium thunbergii. Bioorg Med Chem 2022; 68:116840. [PMID: 35661848 DOI: 10.1016/j.bmc.2022.116840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/18/2022] [Accepted: 05/18/2022] [Indexed: 11/17/2022]
Abstract
Amyloid β (Aβ) aggregates in the brains of patients with Alzheimer's disease (AD) and accumulates via oligomerization and subsequent fiber elongation processes. These toxicity-induced neuronal damage and shedding processes advance AD progression. Therefore, Aβ aggregation-inhibiting substances may contribute to the prevention and treatment of AD. We screened for Aβ42 aggregation inhibitory activity using various plant extracts and compounds, and found high activity for a Geranium thunbergii extract (EC50 = 18 μg/mL). Therefore, we screened for Aβ42 aggregation inhibitors among components of a G. thunbergii extract and investigated their chemical properties in this study. An active substance was isolated from the ethanol extract of G. thunbergii based on the Aβ42 aggregation inhibitory activity as an index, and the compound was identified as geraniin (1) based on spectral data. However, although geraniin showed in vitro aggregation-inhibition activity, no binding to Aβ42 was observed via saturation transfer difference-nuclear magnetic resonance (STD-NMR). In contrast, the hydrolysates gallic acid (2) and corilagin (5) showed aggregation-inhibiting activity and binding was observed via STD-NMR. Therefore, the hydrolysates produced under the conditions of the activity test may contribute to the Aβ42 aggregation-inhibition activity of G. thunbergii extracts. Geraniin derivatives may help prevent and treat AD.
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Affiliation(s)
- Kenji Kubo
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Hikaru Watanabe
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Hiroyuki Kumeta
- Graduate Schol of Life Science, Hokaido University, Kita 10, Nishi 8, Kita-ku, Saporo, Hokkaido 060-0808, Japan
| | - Tomoyasu Aizawa
- Graduate Schol of Life Science, Hokaido University, Kita 10, Nishi 8, Kita-ku, Saporo, Hokkaido 060-0808, Japan
| | - Chigusa Seki
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Hiroto Nakano
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Koji Uwai
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan.
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Morishita Y, Tsukada K, Murakami K, Irie K, Asai T. Synthetic Biology-Based Discovery of Diterpenoid Pyrones from the Genome of Eupenicillium shearii. JOURNAL OF NATURAL PRODUCTS 2022; 85:384-390. [PMID: 35057611 DOI: 10.1021/acs.jnatprod.1c00973] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Diterpenoid pyrones are a type of mainly fungal meroterpenoid metabolite consisting of a diterpene connected to a pyrone, some of which show potent bioactivity. Through genome mining and heterologous expression, nine new diterpenoid pyrones, shearones A-I (1-9), were discovered from the fungus Eupenicillium shearii IFM 42152, and their biosynthetic enzyme activities were revealed. Some of these heterologously biosynthesized diterpenoid pyrones exhibited moderate antiaggregative ability against amyloid β42 in vitro.
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Affiliation(s)
- Yohei Morishita
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Kento Tsukada
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Kazuma Murakami
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Kazuhiro Irie
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Teigo Asai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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Take Y, Chikai Y, Shimamori K, Kuragano M, Kurita H, Tokuraku K. Amyloid β aggregation induces human brain microvascular endothelial cell death with abnormal actin organization. Biochem Biophys Rep 2022; 29:101189. [PMID: 34977364 PMCID: PMC8685982 DOI: 10.1016/j.bbrep.2021.101189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 12/07/2021] [Accepted: 12/11/2021] [Indexed: 12/28/2022] Open
Abstract
Cerebral amyloid angiopathy (CAA) is a disease in which amyloid β (Aβ) is deposited on the walls of blood vessels in the brain, making those walls brittle and causing cerebral hemorrhage. However, the mechanism underlying its onset is not well understood. The aggregation and accumulation of Aβ cause the occlusion and fragility of blood vessels due to endothelial cell damage, breakdown of the blood-brain barrier, and replacement with elements constituting the blood vessel wall. In this study, we observed the effect of Aβ on human primary brain microvascular endothelial cells (hBMECs) in real-time using quantum dot nanoprobes to elucidate the mechanism of vascular weakening by Aβ. It was observed that Aβ began to aggregate around hBMECs after the start of incubation and that the cells were covered with aggregates. Aβ aggregates firmly anchored the cells on the plate surface, and eventually suppressed cell motility and caused cell death. Furthermore, Aβ aggregation induced the organization of abnormal actin, resulting in a significant increase in intracellular actin dots over 10 μm2. These results suggest that the mechanism by which Aβ forms a fragile vessel wall is as follows: Aβ aggregation around vascular endothelial cells anchors them to the substrate, induces abnormal actin organization, and leads to cell death. Amyloid β (Aβ) aggregates anchor human endothelial cells to the substrate. Aβ induces abnormal actin organization in human endothelial cells. Aβ induces cell death of human endothelial cells.
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Affiliation(s)
- Yushiro Take
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
- Ohkawara Neurosurgical Hospital, Hokkaido, 050-0082, Japan
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, Saitama, 350-1298, Japan
| | - Yusaku Chikai
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - Keiya Shimamori
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - Masahiro Kuragano
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - Hiroki Kurita
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, Saitama, 350-1298, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
- Corresponding author.
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Qu Z, Zhou L. Drug Development in the Field of Sphinogolipid Metabolism. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1372:169-188. [DOI: 10.1007/978-981-19-0394-6_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Olennikov DN, Nikolaev VM, Chirikova NK. Sagan Dalya Tea, a New "Old" Probable Adaptogenic Drug: Metabolic Characterization and Bioactivity Potentials of Rhododendron adamsii Leaves. Antioxidants (Basel) 2021; 10:863. [PMID: 34072186 PMCID: PMC8227344 DOI: 10.3390/antiox10060863] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 05/26/2021] [Accepted: 05/26/2021] [Indexed: 12/14/2022] Open
Abstract
Adams' rhododendron (Rhododendron adamsii Rehder) or Sagan Dalya tea is a famous Siberian evergreen medical plant of the Ericaceae family used in traditional medicines of Buryats, Yakuts, and Mongols as a tonic, stimulant, and adaptogenic drug. The high popularity of R. adamsii coupled with poor scientific knowledge prompted the addressing of gaps related to metabolic and biomedical data of Sagan Dalya tea. The application of solid-phase extraction and liquid chromatography-mass spectrometric techniques for the metabolomic study of R. adamsii leaf extracts resulted in the identification of more than 170 compounds, including carbohydrates, organic acids, simple phenol glycosides, triterpene glycosides, flavonoids, prenylated phenols, benzoic acid derivatives, hydroxycinnamates, dihydrochalcones, catechins, and procyanidins, most of which were identified for the first time in the plant. Extended surveys of the seasonal content of all detected compounds prove that specific metabolite variations reflect the bioactivity of R. adamsii extracts. Regarding in vitro methods, the expressed antioxidant potential of R. adamsii extracts was investigated via radical-scavenging, nitric oxide scavenging, and ferrous (II) ion chelating assays. The animal-based swimming to exhaustion test demonstrates the stimulating influence of R. adamsii extract on physical performance and endurance, concluding that the drug could act as an adaptogen. Thus, Sagan Dalya tea (R. adamsii) has confirmed its "old" application as a tonic remedy and requires further precise study as a novel adaptogenic plant.
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Affiliation(s)
- Daniil N. Olennikov
- Laboratory of Medical and Biological Research, Institute of General and Experimental Biology, Siberian Division, Russian Academy of Science, 670047 Ulan-Ude, Russia
| | - Vyacheslav M. Nikolaev
- Department of the Adaptation Mechanisms Study, Yakutsk Scientific Center of Complex Medical Problems, 677000 Yakutsk, Russia;
| | - Nadezhda K. Chirikova
- Department of Biology, Institute of Natural Sciences, North-Eastern Federal University, 677027 Yakutsk, Russia;
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