1
|
Guo Y, Xu Q, Tao B, Huang X, Cao Y, Sun W, Qi C, Zhu H, Zhang Y. Hyperatins A-D, highly oxidized polycyclic polyprenylated acylphloroglucinols from Hypericum perforatum L. with hypoglycemic potential in liver cells. PHYTOCHEMISTRY 2024; 221:114047. [PMID: 38462213 DOI: 10.1016/j.phytochem.2024.114047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 03/01/2024] [Accepted: 03/02/2024] [Indexed: 03/12/2024]
Abstract
Hyperatins A-D (1-4), four previously undescribed polycyclic polyprenylated acylphloroglucinols, were isolated from Hypericum perforatum L. (St. John's wort). Compound 1 possessed a unique octahydroindeno[1,7a-b]oxirene ring system with a rare 2,7-dioxabicyclo[2.2.1]heptane fragment. Compounds 2-4 had an uncommon decahydrospiro[furan-3,7'-indeno[7,1-bc]furan] ring system. Their structures were established by spectroscopic analyses and X-ray crystallography. Plausible biosynthetic pathways of 1-4 were also proposed. Compounds 1 and 2 exerted promising hypoglycemic activity by inhibiting glycogen synthase kinase 3 expression in liver cells.
Collapse
Affiliation(s)
- Yi Guo
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China
| | - Qianqian Xu
- Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Bo Tao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China
| | - Xinye Huang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China
| | - Yunfang Cao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China
| | - Weiguang Sun
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China
| | - Changxing Qi
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China.
| | - Hucheng Zhu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China.
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Wuhan, 430030, China.
| |
Collapse
|
2
|
Tao L, Xu S, Zhang Z, Li Y, Yang J, Gu W, Yi P, Hao X, Yuan C. Bioassay-guided isolation of α-Glucosidase inhibitory constituents from Hypericum sampsonii. Chin J Nat Med 2023; 21:443-453. [PMID: 37407175 DOI: 10.1016/s1875-5364(23)60472-8] [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: 10/12/2022] [Indexed: 07/07/2023]
Abstract
This study employed the α-glucosidase inhibitory activity model as an anti-diabetic assay and implemented a bioactivity-guided isolation strategy to identify novel natural compounds with potential therapeutic properties. Hypericum sampsoniiwas investigated, leading to the isolation of two highly modified seco-polycyclic polyprenylated acylphloroglucinols (PPAPs) (1 and 2), eight phenolic derivatives (3-10), and four terpene derivatives (11-14). The structures of compounds 1 and 2, featuring an unprecedented octahydro-2H-chromen-2-one ring system, were fully characterized using extensive spectroscopic data and quantum chemistry calculations. Six compounds (1, 5-7, 9, and 14) exhibited potential inhibitory effects against α-glucosidase, with IC50 values ranging from 0.050 ± 0.0016 to 366.70 ± 11.08 μg·mL-1. Notably, compound 5 (0.050 ± 0.0016 μg·mL-1) was identified as the most potential α-glucosidase inhibitor, with an inhibitory effect about 6900 times stronger than the positive control, acarbose (IC50 = 346.63 ± 15.65 μg·mL-1). A docking study was conducted to predict molecular interactions between two compounds (1 and 5) and α-glucosidase, and the hypothetical biosynthetic pathways of the two unprecedented seco-PPAPs were proposed.
Collapse
Affiliation(s)
- Linlan Tao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Shuangyu Xu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Zizhen Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Yanan Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Jue Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Wei Gu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Ping Yi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China.
| | - Xiaojiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China; State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
| | - Chunmao Yuan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China; Natural Products Research Center of Guizhou Province, Guiyang 550014, China.
| |
Collapse
|
3
|
Salinas M, Bec N, Calva J, Larroque C, Vidari G, Armijos C. Constituents, Enantiomeric Content, and ChE Inhibitory Activity of the Essential Oil from Hypericum laricifolium Juss. Aerial Parts Collected in Ecuador. PLANTS (BASEL, SWITZERLAND) 2022; 11:2962. [PMID: 36365414 PMCID: PMC9659171 DOI: 10.3390/plants11212962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 10/19/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
The physical properties, chemical composition, enantiomer distribution, and cholinesterase (ChE) inhibitory activity were determined for a steam-distilled essential oil (EO), with a yield of 0.15 ± 0.05 % (w/w), from H. laricifolium aerial parts, collected in southern Ecuador. The oil qualitative and quantitative analyses were performed by GC-EIMS and GC-FID techniques, using two capillary columns containing a non-polar 5%-phenyl-methylpolysiloxane and a polar polyethylene glycol stationary phase, respectively. The main constituents (>10%) detected on the two columns were, respectively, limonene (24.29, 23.16%), (E)-β-ocimene (21.89, 27.15%), and (Z)-β-ocimene (12.88, 16.03%). The EO enantioselective analysis was carried out using a column based on 2,3-diethyl-6-tert-butyldimethylsilyl-β-cyclodextrin. Two mixtures of chiral monoterpenes were detected containing (1R,5R)-(+)-α-pinene (ee = 83.68%), and (S)-(-)-limonene (ee = 88.30%) as the major enantiomers. This finding led to some hypotheses about the existence in the plant of two enantioselective biosynthetic pathways. Finally, the EO exhibited selective inhibitory effects in vitro against butyrylcholinesterase (BuChE) (IC50 = 36.80 ± 2.40 µg/mL), which were about three times greater than against acetylcholinesterase (IC50 = 106.10 ± 20.20). Thus, the EO from Ecuadorian H. laricifolium is an interesting candidate for investigating the mechanism of the selective inhibition of BuChE and for discovering novel drugs to manage the progression of Alzheimer’s disease.
Collapse
Affiliation(s)
- Melissa Salinas
- Departamento de Química, Universidad Técnica Particular de Loja (UTPL), Loja 1101608, Ecuador
| | - Nicole Bec
- Institute for Regenerative Medicine and Biotherapy (IRMB), Université de Montpellier, National Institute of Health and Medical Research (INSERM), 34295 Montpellier, France
| | - James Calva
- Departamento de Química, Universidad Técnica Particular de Loja (UTPL), Loja 1101608, Ecuador
| | - Christian Larroque
- Institute for Regenerative Medicine and Biotherapy (IRMB), Université de Montpellier, National Institute of Health and Medical Research (INSERM), 34295 Montpellier, France
| | - Giovanni Vidari
- Department of Medical Analysis, Faculty of Applied Science, Tishk International University, Erbil 44001, Kurdistan Region, Iraq
| | - Chabaco Armijos
- Departamento de Química, Universidad Técnica Particular de Loja (UTPL), Loja 1101608, Ecuador
| |
Collapse
|