1
|
Liu X, Zhou M, He S, Xu Q, Du C, Zhu H, Lin T, Wang G, Tian W, Chen H. Polyhydric Stigmastane-Type Steroids Derivative from Vernonia amygdalina and Their Anti-Neuroinflammatory Activity. Pharmaceuticals (Basel) 2022; 15:ph15091160. [PMID: 36145381 PMCID: PMC9506346 DOI: 10.3390/ph15091160] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/15/2022] [Accepted: 09/15/2022] [Indexed: 11/27/2022] Open
Abstract
Vernonia amygdalina Del. is a traditional medicinal plant and vegetable originating from tropical Africa. The phytochemical investigation of V. amygdalina led to eight undescribed polyhydric stigmastane-type steroids, vernonin M–T (1–8). Their gross structures and stereochemistry were elucidated by HR-ESI-MS, 1D and 2D NMR spectra, X-ray diffraction, quantum chemical computation of the ECD spectrum, and the in situ dimolybdenum CD method. The anti-neuroinflammatory activity of the isolated compounds was performed in BV-2 microglia cells. As a result, compound 1 displayed a notable anti-neuroinflammatory effect via suppressing the LPS-induced IκB degradation and restricting the activation of the PI3K/AKT and p38 MAPK pathways.
Collapse
|
2
|
Liu X, Tian W, Zhou M, Xu Q, Feng J, Yang R, He S, Wang G, Lin T, Chen H. Bisabolane-type sesquiterpenes from Vernonia amygdalina: Absolute configuration and anti-inflammatory activity. Phytochemistry 2022; 201:113283. [PMID: 35738434 DOI: 10.1016/j.phytochem.2022.113283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/10/2022] [Accepted: 06/12/2022] [Indexed: 06/15/2023]
Abstract
The phytochemical assessment of Vernonia amygdalina resulted in the isolation and identification of seven undescribed bisabolane-type sesquiterpenes designated amygdanoids A-G and one known analogue. This is the first report of this type of sesquiterpene from V. amygdalina. Their structures, including the absolute configurations, were elucidated by comprehensive analysis with HRESIMS, 1D and 2D NMR, quantum chemical calculations of NMR and electronic circular dichroism (ECD), modified Mosher's method, and the in situ dimolybdenum CD method. The anti-inflammatory activity of the isolates was evaluated. All the isolated compounds clearly inhibited the production of NO and the expression of the iNOS protein. Secretion of the COX-2 protein was constrained by amygdanoids A-F. Further investigation suggested that amygdanoids E exhibited anti-inflammatory activity by suppressing the expression of iNOS and COX-2 as well as the PI3K/AKT/NF-κB signaling pathway.
Collapse
Affiliation(s)
- Xiangzhong Liu
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Wenjing Tian
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China.
| | - Mi Zhou
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Qiannan Xu
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Jie Feng
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Renjing Yang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Shoulun He
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Guanghui Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Ting Lin
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China
| | - Haifeng Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, PR China.
| |
Collapse
|
3
|
Wang J, Song H, Wu X, Zhang S, Gao X, Li F, Zhu X, Chen Q. Steroidal Saponins from Vernonia amygdalina Del. and Their Biological Activity. Molecules 2018; 23:E579. [PMID: 29510543 DOI: 10.3390/molecules23030579] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/01/2018] [Accepted: 03/02/2018] [Indexed: 11/16/2022] Open
Abstract
In the present study, four new steroidal saponins, namely vernoniamyoside A–D (1–4), together with the two known steroidal saponins vernoamyoside D (5) and vernonioside B2 (6) were isolated from the ethanol extract of leaves of the African medicinal plant Vernonia amygdalina Del. (Asteraceae). Their structures were demonstrated by spectral analyses along with 1D and 2D nuclear magnetic resonance (NMR) techniques and mass spectrometry (MS). The cytotoxicity of the compounds was also tested by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method on the cell lines Hela, MCF-7, BT-549 and MDA-MB-231. Vernoniamyoside A, vernoniamyoside B, and vernonioside B2 showed cytotoxicity towards BT-549 cell lines. Vernoniamyoside C, vernoniamyoside D and vernoamyoside D showed different levels of cytotoxic activities.
Collapse
|
4
|
Atangwho IJ, Edet EE, Uti DE, Obi AU, Asmawi MZ, Ahmad M. Biochemical and histological impact of Vernonia amygdalina supplemented diet in obese rats. Saudi J Biol Sci 2012; 19:385-92. [PMID: 23961200 DOI: 10.1016/j.sjbs.2012.05.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 05/08/2012] [Accepted: 05/12/2012] [Indexed: 11/22/2022] Open
Abstract
This study was carried out to evaluate the anti-obesity effect of Vernonia amygdalina Del. (VA) supplemented diet. VA leaf powder was fed at 5% and 15% to diet-induced obese rats for 4 weeks and its effect compared with orlistat (5.14 mg/kg p.o.), an anti-obesity drug. Food intake, body and organ weights, total body fat, some lipid components and amino transaminase activities in serum, hepatocytes and brain; as well as serum glucose, were measured during or at end of the study. Result showed respective decrease of 12.78% and 38.51% in body weight gain, of VA fed rats against 17.45% of orlistat at end of study (P < 0.05); but with no effect on food intake. Total body fat was lowered by 28.04% and 30.02% vs. obese control rats (CDC) (P < 0.05). Furthermore, serum triacylglycerol (TG), serum and brain total cholesterol (TCHOL), were down regulated at 15% VA supplementation (P < 0.05). Serum glucose which increased in obese rats by 46.26% (P < 0.05) vs. NC, indicating intolerance, was restored by VA (38.75% and 34.65%) and orlistat (31.80%) vs. CDC (P < 0.05). VA diet also exerted hepato-protection, via lowering serum alanine amino transaminase (ALT) (41.35% and 27.13%) and aspartate amino transaminase (AST) (17.09% and 43.21%) activities (P < 0.05). Orlistat had no effect on these enzymes. Histology of adipose tissue corroborated the changes on total body fat. We concluded that, diet supplemented with VA can attenuate dietary obesity as well as ameliorates the potential risks of hepato-toxicity and glucose intolerance associated with obesity.
Collapse
|