1
|
Hong LL, Liu YN, Kong JQ. Exploring 3-O-glycosylations of 20(R)-dammarane ginsenosides and the catalytic mechanism underlying the stereoselectivity with the combined assistance of AlphaFold 2 and molecular docking. Int J Biol Macromol 2024; 254:127721. [PMID: 37913883 DOI: 10.1016/j.ijbiomac.2023.127721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/22/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023]
Abstract
Glycosylation at C3-OH is the favorable modification for pharmaceutical activities and diversity expansion of 20(R)-dammarane ginsenosides. The 3-O-glycosylation, exclusively occurring in 20(R)-PPD ginsenosides, has never been achieved in 20(R)-PPT ginsenosides. Herein, 3-O-glycosylation of 20(R)-PPT enabled by a glycosyltransferase (GT) OsSGT2 was achieved with the combined assistance of AlphaFold 2 and molecular docking. Firstly, we combined AlphaFold2 algorithm and molecular docking to predict interactions between 20(R)-PPT and candidate GTs. A catalytically favorable binding geometry was thus identified in the OsSGT2-20(R)-PPT complex, suggesting OsSGT2 might act on 20(R)-PPT. The enzymatic assays demonstrated that OsSGT2 reacted with varied sugar donors to form 20(R)-PPT 3-O-glycosides, exhibiting donor promiscuity. Additionally, OsSGT2 displayed acceptor promiscuity, catalyzing 3-O-glucosylation of 20(R/S)-PPT, 20(R/S)-PPD and 20(R/S)-Rh1, respectively. Protein engineering on OsSGT2 was thus performed to probe its catalytic mechanism underlying its stereoselectivity. The W207A mutant preferred 20(S)-dammarane aglycons, while F395Q/A396G(QG) displayed a conversion enhancement towards both 20(R/S)-dammarane aglycons. The QG mutant was then used to synthesize 20(R)-PPT 3-O-glucoside, which displayed a moderate angiotensin-converting enzyme inhibitory effect with an IC50 of 27.5 ± 4.7 μM, superior to that of its 20(S)-epimer, with the combined assistance of target fishing and reverse docking. The water solubility of 20(R)-PPT 3-O-glucoside increased as well.
Collapse
Affiliation(s)
- Li-Li Hong
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College (State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biosynthesis of Natural Products & CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs), Beijing 100050, China
| | - Yuan-Ning Liu
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College (State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biosynthesis of Natural Products & CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs), Beijing 100050, China
| | - Jian-Qiang Kong
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College (State Key Laboratory of Bioactive Substance and Function of Natural Medicines, NHC Key Laboratory of Biosynthesis of Natural Products & CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs), Beijing 100050, China.
| |
Collapse
|
2
|
Wang Y, Pei H, Chen W, Du R, Li J, He Z. Palmatine Protects PC12 Cells and Mice from Aβ25-35-Induced Oxidative Stress and Neuroinflammation via the Nrf2/HO-1 Pathway. Molecules 2023; 28:7955. [PMID: 38138445 PMCID: PMC10745955 DOI: 10.3390/molecules28247955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/28/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023] Open
Abstract
Alzheimer's disease is a common degenerative disease which has a great impact on people's daily lives, but there is still a certain market gap in the drug research about it. Palmatine, one of the main components of Huangteng, the rattan stem of Fibraurea recisa Pierre (Menispermaceae), has potential in the treatment of Alzheimer's disease. The aim of this study was to evaluate the neuroprotective effect of palmatine on amyloid beta protein 25-35-induced rat pheochromocytoma cells and AD mice and to investigate its mechanism of action. CCK8 assays, ELISA, the Morris water maze assay, fluorescent probes, calcein/PI staining, immunofluorescent staining and Western blot analysis were used. The experimental results show that palmatine can increase the survival rate of Aβ25-35-induced PC12 cells and mouse hippocampal neurons, reduce apoptosis, reduce the content of TNF-α, IL-1β, IL-6, GSH, SOD, MDA and ROS, improve the learning and memory ability of AD mice, inhibit the expression of Keap-1 and Bax, and promote the expression of Nrf2, HO-1 and Bcl-2. We conclude that palmatine can ameliorate oxidative stress and neuroinflammation produced by Aβ25-35-induced PC12 cells and mice by modulating the Nrf2/HO-1 pathway. In conclusion, our results suggest that palmatine may have a potential therapeutic effect on AD and could be further investigated as a promising therapeutic agent for AD. It provides a theoretical basis for the development of related drugs.
Collapse
Affiliation(s)
- Yu Wang
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (Y.W.); (H.P.); (W.C.); (R.D.)
| | - Hongyan Pei
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (Y.W.); (H.P.); (W.C.); (R.D.)
| | - Weijia Chen
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (Y.W.); (H.P.); (W.C.); (R.D.)
| | - Rui Du
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (Y.W.); (H.P.); (W.C.); (R.D.)
- Key Laboratory of Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Jianming Li
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (Y.W.); (H.P.); (W.C.); (R.D.)
| | - Zhongmei He
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (Y.W.); (H.P.); (W.C.); (R.D.)
- Key Laboratory of Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| |
Collapse
|
3
|
Zhou X, Xia X. Ginsenoside Rg3 improves microcystin-induced cardiotoxicity through the miR-128-3p/MDM4 axis. Drug Chem Toxicol 2023:1-11. [PMID: 37990515 DOI: 10.1080/01480545.2023.2251716] [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: 03/03/2023] [Accepted: 08/15/2023] [Indexed: 11/23/2023]
Abstract
Microcystin (MC) is the byproduct of cyanobacteria metabolism that is associated with oxidative stress and heart damage. This study aimed to investigate the effect of ginsenoside Rg3 on MC-induced cardiotoxicity. A mouse model of myocardial infarction was constructed by oral MC administration. H9C2 cells were used for in vitro analysis. Cellular oxidative stress, apoptosis, and the relationship between miR-128-3p and double minute 4 protein (MDM4) were analyzed. MiR-128-3p expression was upregulated in vitro and in vivo after MC treatment, which was downregulated after Rg3 treatment. Left ventricular ejection fraction (LVEF) and left ventricular systolic pressure (LVSP) were increased and left ventricular end-diastolic pressure (LVEDP) was decreased after Rg3 treatment. Moreover, Rg3 alleviated MC-induced pathological changes and apoptosis in myocardial tissues. Meanwhile, Rg3 treatment decreased the lactate dehydrogenase (LDH) and malondialdehyde (MDA) levels and inhabited cell apoptosis and oxidative stress in MC-treated myocardial cells. MiR-128-3p overexpression attenuated the protective effect of Rg3 on MC-induced cardiotoxicity. MiR-128-3p negatively regulated MDM4 expression. This study revealed that Rg3 alleviated MC-induced cardiotoxicity through the miR-128-3p/MDM4 axis, which emphasized the potential of Rg3 as a therapeutic agent for MC-induced cardiotoxicity, and miR-128-3p as a target for the Rg3 therapy.
Collapse
Affiliation(s)
- Xiaoming Zhou
- Department of Cardiovascular Medicine, The First Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Xiaoyan Xia
- Dean's Office, Changsha Health Vocational College, Changsha, Hunan, China
| |
Collapse
|
4
|
Xu K, Hu B, Ding X, Zhan Z. Alleviation of D-gal-induced senile liver injury by Rg3, a signature component of red ginseng. Aging (Albany NY) 2023; 15:6749-6756. [PMID: 37348025 PMCID: PMC10415550 DOI: 10.18632/aging.204819] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 05/31/2023] [Indexed: 06/24/2023]
Abstract
To investigate the mechanism by which ginsenoside Rg3 regulates oxidative stress (OS) and inflammation through NF/KB pathway to delay mouse liver injury. This work randomized Balbc mice as four groups: Normal, D-gal, Rg3-L, Rg3-H. Paraffin-embedded liver tissue sections were prepared, later, BAX/BCL-2 protein expression was observed by HE, Sirius red, TUNEL and immunofluorescence to detect apoptotic injury and α-SMA/TGF-β protein expression to detect fibrosis, and liver inflammation-related protein NF-KB was detected. HE and TUNEL staining showed that Rg3 reduced necrotic cells and fibrosis in liver-injured mice, Rg3 increased anti-inflammatory cytokine IL-18 and reduced TNF-α, IL-1β and IL-6 expression. Conclusion: Ginsenoside Rg3 can effectively antagonize D-gal's role in mouse liver injury, and its mechanism may be associated with regulating inflammatory pathway by Rg.
Collapse
Affiliation(s)
- Ke Xu
- Department of Clinical Medicine, Medical College of Nanchang University, Nanchang 330000, Jiangxi Province, P.R. China
| | - Biwen Hu
- Department of Surgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314001, Zhejiang Province, P.R. China
| | - Xuhui Ding
- Department of Surgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314001, Zhejiang Province, P.R. China
| | - Zhengyu Zhan
- Department of Oncology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, P.R. China
| |
Collapse
|
5
|
Korean red ginseng water extract produces antidepressant-like effects through involving monoamines and brain-derived neurotrophic factor in rats. J Ginseng Res 2023. [DOI: 10.1016/j.jgr.2023.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
|
6
|
Oxidative Stress and Ginsenosides: An Update on the Molecular Mechanisms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:9299574. [PMID: 35498130 PMCID: PMC9045968 DOI: 10.1155/2022/9299574] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 12/18/2022]
Abstract
Ginsenosides are a class of active components extracted from ginseng plants (such as Panax ginseng, Panax quinquefolium, and Panax notoginseng). Ginsenosides have significant protective effects on the nervous system, cardiovascular system, and immune system, so they have been widely used in the treatment of related diseases. Entry of a variety of endogenous or exogenous harmful substances into the body can lead to an imbalance between the antioxidant defense system and reactive oxygen species, thus producing toxic effects on a variety of tissues and cells. In addition, oxidative stress can alter multiple signaling pathways, including the Keap1/Nrf2/ARE, PI3K/AKT, Wnt/β-catenin, and NF-κB pathways. With the deepening of research in this field, various ginsenoside monomers have been reported to exert antioxidant effects through multiple signaling pathways and thus have good application prospects. This article summarized the research advancements regarding the antioxidative effects and related mechanisms of ginsenosides, providing a theoretical basis for experimental research on and clinical treatment with ginsenosides.
Collapse
|
7
|
Bao M, Liang M, Sun X, Mohyuddin SG, Chen S, Wen J, Yong Y, Ma X, Yu Z, Ju X, Liu X. Baicalin Alleviates LPS-Induced Oxidative Stress via NF-κB and Nrf2–HO1 Signaling Pathways in IPEC-J2 Cells. Front Vet Sci 2022; 8:808233. [PMID: 35146015 PMCID: PMC8822581 DOI: 10.3389/fvets.2021.808233] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 12/28/2021] [Indexed: 12/12/2022] Open
Abstract
Baicalin is a natural plant extract with anti-inflammatory and anti-oxidant activities. However, the molecular mechanism of baicalin on oxidative stress in IPEC-J2 cells exposed to LPS remains to be unclear. In this study, LPS stimulation significantly increased Toll-like receptor 4, tumor necrosis factor-α, and interleukins (IL-6 and IL-1β) expression in IPEC-J2 cells, and it activated the nuclear factor (NF-κB) expression. While, baicalin exerted anti-inflammatory effects by inhibiting NF-κB signaling pathway. LPS stimulation significantly increased the levels of the oxidative stress marker MDA, inhibited the anti-oxidant enzymes catalase and superoxide dismutase, which were all reversed by baicalin pre-treatment. It was found that baicalin treatment activated the nuclear import of nuclear factor-erythroid 2 related factor 2 (Nrf2) protein, and significantly increased the mRNA and protein expression of its downstream anti-oxidant factors such as heme oxygenase-1 and quinone oxidoreductase-1, which suggested that baicalin exerted anti-oxidant effects by activating the Nrf2-HO1 signaling pathway. Thus, pretreatment with baicalin inhibited LPS - induced oxidative stress and protected the normal physiological function of IPEC-J2 cells via NF-κB and Nrf2–HO1 signaling pathways.
Collapse
|
8
|
Chen Y, Wang L, Liu T, Qiu Z, Qiu Y, Liu D. Inhibitory effects of Panax ginseng glycoproteins in models of doxorubicin-induced cardiac toxicity in vivo and in vitro. Food Funct 2021; 12:10862-10874. [PMID: 34617939 DOI: 10.1039/d1fo01307f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Doxorubicin (DOX) is an effective antineoplastic drug; however, its clinical application is limited owing to the side effect of fatal heart dysfunction on its use. Panax ginseng glycoproteins have antioxidant, antiapoptotic, and anti-inflammatory properties. Thus, the aim of this study was to investigate the effects and possible action mechanisms of P. ginseng glycoproteins against DOX-induced cardiotoxicity. To this end, we used an in vitro model of DOX-treated H9C2 cells and an in vivo model of DOX-treated rats. We found that P. ginseng glycoproteins markedly increased H9C2 cell viability, decreased creatine kinase and lactate dehydrogenase levels, and improved histopathological and electrocardiogram changes in rats, protecting them from DOX-induced cardiotoxicity. Furthermore, P. ginseng glycoproteins significantly inhibited myocardial oxidative insult through adjusting the intracellular ROS, MDA, SOD, and GSH levels in vitro and in vivo. In conclusion, our data suggest that P. ginseng glycoproteins alleviated DOX-induced myocardial oxidative stress-related cardiotoxicity. This natural product could be developed as a new candidate for alleviating DOX-induced cardiotoxicity.
Collapse
Affiliation(s)
- Yajun Chen
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China.
| | - Lei Wang
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China.
| | - Tianjia Liu
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China.
| | - Zhidong Qiu
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China.
| | - Ye Qiu
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China.
| | - Da Liu
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China.
| |
Collapse
|