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Liu S, Zhang X, Lin B, Mao J, Zhan J, Li Y, Zhou J, Wang N, Qiu W. Melastoma dodecandrum lour. Protects against cerebral ischemia-reperfusion injury by ameliorating oxidative stress and endoplasmic reticulum stress. JOURNAL OF ETHNOPHARMACOLOGY 2025; 336:118735. [PMID: 39182701 DOI: 10.1016/j.jep.2024.118735] [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: 06/14/2024] [Revised: 08/06/2024] [Accepted: 08/22/2024] [Indexed: 08/27/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Melastoma dodecandrum Lour. (MD), a traditional Chinese medicine used by the She ethnic group, has been used to treat cerebral ischemia-reperfusion (CIR) injury due to its efficacy in promoting blood circulation and removing blood stasiss; however, the therapeutic effects and mechanisms of MD in treating CIR injury remain unclear. AIM To investigate the protective effects of MD on CIR injury, in addition to its impact on oxidative stress, endoplasmic reticulum (ER) stress, and cell apoptosis. MATERIALS AND METHODS The research was conducted using both cell experiments and animal experiments. The CCK-8 method, immunofluorescence staining, and flow cytometry were used to analyze the effects of MD-containing serum on oxygen-glucose deprivation/reperfusion (OGD/R)-induced PC12 cell viability, reactive oxygen species (ROS) clearance, anti-inflammatory, neuroprotection and inhibition of apoptosis. Furthermore, 2,3,5-Triphenyl tetrazolium chloride staining, hematoxylin and eosin staining, Nissl staining, and immunohistochemistry were used to detect infarct size, pathological changes, Nissl corpuscula and neuronal protein expression in middle cerebral artery occlusion (MCAO) rats. Polymerase chain reaction and Western Blotting were conducted in cell and animal experiments to detect the expression levels of ER stress-related genes and proteins. RESULTS The MD extract enhanced the viability of PC12 cells under OGD/R modeling, reduced ROS and IL-6 levels, increased MBP levels, and inhibited cell apoptosis. Furthermore, MD improved the infarct area in MCAO rats, increased the number of Nissl bodies, and regulated neuronal protein levels including Microtubule-Associated Protein 2 (MAP-2), Myelin Basic Protein (MBP), Glial Fibrillary Acidic Protein (GFAP), and Neurofilament 200 (NF200). Additionally, MD could regulate the expression levels of oxidative stress proteins malondialdehyde (MDA), nitric oxide (NO), superoxide dismutase (SOD), and catalase (CAT). Both cell and animal experiments demonstrated that MD could inhibit ER stress-related proteins (GRP78, ATF4, ATF6, CHOP) and reduce cell apoptosis. CONCLUSION This study confirmed that the therapeutic mechanism of the MD extract on CIR injury was via the inhibition of oxidative stress and the ER stress pathway, in addition to the inhibition of apoptosis.
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Affiliation(s)
- Shuang Liu
- Department of Pharmacy, Lishui Hospital of Traditional Chinese Medicine, Lishui, Zhejiang, 323000, China.
| | - Xiaoqin Zhang
- Department of Pharmacy, Lishui Hospital of Traditional Chinese Medicine, Lishui, Zhejiang, 323000, China.
| | - Bingfeng Lin
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, Zhejiang, 310007, China.
| | - Jiale Mao
- Department of Pharmacy, Lishui Hospital of Traditional Chinese Medicine, Lishui, Zhejiang, 323000, China.
| | - Jianhu Zhan
- Department of Pharmacy, Lishui Hospital of Traditional Chinese Medicine, Lishui, Zhejiang, 323000, China; Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310007, China.
| | - Yanyan Li
- Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China.
| | - Jiwang Zhou
- Department of Pharmacy, Lishui Hospital of Traditional Chinese Medicine, Lishui, Zhejiang, 323000, China.
| | - Nani Wang
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310007, China; Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, Zhejiang, 310007, China.
| | - Weiwen Qiu
- Department of Pharmacy, Lishui Hospital of Traditional Chinese Medicine, Lishui, Zhejiang, 323000, China.
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Lai W, Wang Y, Huang C, Xu H, Zheng X, Li K, Wang J, Lou Z. DIREN mitigates DSS-induced colitis in mice and attenuates collagen deposition via inhibiting the Wnt/β-catenin and focal adhesion pathways. Biomed Pharmacother 2024; 175:116671. [PMID: 38678963 DOI: 10.1016/j.biopha.2024.116671] [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: 03/11/2024] [Revised: 04/18/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024] Open
Abstract
BACKGROUND DIREN is a SHE ethnic medicine with stasis-resolving, hemostasis, clearing heat, and removing toxin effects. It is clinically used in the treatment of gastrointestinal bleeding, such as ulcerative colitis (UC). AIM OF THE STUDY Fibrosis is one of the pathological changes in the progression of UC, which can make it challenging to respond to a treatment. We aimed to illuminate the role of DIREN in DSS-induced UC and tried to unveil its related mechanisms from two perspectives: intestinal inflammation and collagen deposition. MATERIALS AND METHODS A 2.5 % dextran sulfate sodium (DSS) water solution was used to induce colitis in mice. The therapeutic effect of DIREN was assessed using the disease activity index, histopathological score, and colon length. Masson and Sirius Red staining was used to observe the fibrosis in the colon. Apoptosis of colonic epithelial cells was observed by TUNEL immunofluorescence staining. RNA-seq observed differential genes and enrichment pathways. Immunohistochemistry and RT-qPCR were used to detect the expression of molecules related to fibrosis and focal adhesion signaling in colon tissue. RESULTS The administration of DIREN resulted in a reduction of disease activity index (DAI) in mice with UC while simultaneously promoting an increase in colon length. DIREN mitigated the loss of goblet cells in the colon of UC mice and maintained the integrity of the intestinal mucosa barrier. Masson staining revealed a reduction in colonic fibrosis with DIREN treatment, while Sirius red staining demonstrated a decrease in collagen Ⅰ deposition. DIREN reduced apoptosis of colonic epithelial cells and the expression of genes, such as CDH2, ITGA1, and TGF-β2. Additionally, the results of GSEA analysis of colon tissue transcriptome showed that the differentially expressed genes were enriched in the focal adhesion pathway. DIREN was found to downregulate the protein expression of BAX, N-cadherin, β-catenin, Integrin A1, and Vinculin while upregulating the protein expression of BCL2. Additionally, it led to the co-expression of N-cadherin and α-SMA. CONCLUSION DIREN exerts a protective effect against DSS-induced UC by ameliorating colonic fibrosis via regulation of focal adhesion and the WNT/β-catenin signaling pathway, thereby inhibiting fibroblast migration and reducing collagen secretion.
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Affiliation(s)
- Weizhi Lai
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Yingying Wang
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Chen Huang
- The First School of Clinical Medical, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Hao Xu
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Xunjie Zheng
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Ke Li
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Jue Wang
- Department of Oncology, the Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou 310005, China
| | - Zhaohuan Lou
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China; Songyang Institute of Zhejiang Chinese Medical University, Lishui, Zhejiang 323400, China.
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Tang Y, Zhou M, Mao Z, Zhu B, Zhou F, Ye X, Chen Y, Ding Z. Structure of a polysaccharide MDP2-1 from Melastoma dodecandrum Lour. and its anti-inflammatory effects. Int J Biol Macromol 2024; 265:131015. [PMID: 38521298 DOI: 10.1016/j.ijbiomac.2024.131015] [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: 09/09/2023] [Revised: 03/01/2024] [Accepted: 03/18/2024] [Indexed: 03/25/2024]
Abstract
The anti-inflammatory activity of polysaccharides derived from Melastoma dodecandrum Lour. was evaluated in pyretic mice and HEK-Blue™ hTLR4 cells. The testing led to the identification of MDP2-1, which was then investigated for its structural characteristics and anti-inflammatory effects. Results showed that MDP2-1 had a molecular weight of 29.234 kDa and primarily consisted of galactose, arabinose, rhamnose, glucose, glucuronic acid, and galacturonic acid. Its main backbone was composed of →4)-α-D-GalpA-(1→, →2)-α-L-Rhap-(1→, →3,4)-α-D-GalpA-(1→, →2,4)-α-D-GlcpA-(1→, and its side chains were connected by →4)-α-D-Galp-(1→, α-D-Galp-(1→, →4)-β-D-Glcp-(1→, and α-L-Araf-(1→. In vivo experiments on mice demonstrated that MDP2-1 attenuated LPS-induced acute lung injury, and in vitro experiments on RAW264.7 cells showed that MDP2-1 reduced the levels of inflammatory mediators and mitigated LPS-induced inflammatory damage by inhibiting the activation of the TLR4 downstream NF-κB/MAPK pathway. These findings suggest that MDP2-1 is a novel anti-inflammatory agent for therapeutic interventions.
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Affiliation(s)
- Youying Tang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China
| | - Mingyuan Zhou
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China
| | - Zian Mao
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China
| | - Bingqi Zhu
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China
| | - Fangmei Zhou
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China
| | - Xiaoqing Ye
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China
| | - Yuchi Chen
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China.
| | - Zhishan Ding
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China.
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Poh WH, Ruhazat NS, Yang LK, Shivhare D, Lim PK, Kanagasundaram Y, Rice SA, Mutwil M. Transcriptomic and metabolomic characterization of antibacterial activity of Melastoma dodecandrum. FRONTIERS IN PLANT SCIENCE 2023; 14:1205725. [PMID: 37771487 PMCID: PMC10525717 DOI: 10.3389/fpls.2023.1205725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 08/21/2023] [Indexed: 09/30/2023]
Abstract
Antibacterial resistance poses a significant global threat, necessitating the discovery of new therapeutic agents. Plants are a valuable source of secondary metabolites with demonstrated anticancer and antibacterial properties. In this study, we reveal that Melastoma dodecandrum exhibits both bacteriostatic and bactericidal effects against Pseudomonas aeruginosa and Staphylococcus aureus. Treatment with plant extracts results in membrane damage and a reduction in P.aeruginosa swimming and swarming motility. A comparative analysis of bacterial transcriptomes exposed to M.dodecandrum extracts and four distinct antibiotics indicates that the extracts may trigger similar transcriptomic responses as triclosan, a fatty acid synthesis inhibitor. Activity-guided fractionation suggests that the antibacterial activity is not attributable to hydrolyzable tannins, but to unidentified minor compounds. Additionally, we identified 104 specialized metabolic pathways and demonstrated a high level of transcriptional coordination between these biosynthetic pathways and phytohormones, highlighting potential regulatory mechanisms of antibacterial metabolites in M.dodecandrum.
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Affiliation(s)
- Wee Han Poh
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Nur Syahirah Ruhazat
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Lay Kien Yang
- Shared Analytics, Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology, and Research (A*STAR), Singapore, Singapore
| | - Devendra Shivhare
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- AAVACC PTE LTD, Singapore, Singapore
| | - Peng Ken Lim
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Yoganathan Kanagasundaram
- Shared Analytics, Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology, and Research (A*STAR), Singapore, Singapore
| | - Scott A. Rice
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
- Agriculture and Food, Microbiomes for One Systems Health, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Canberra, ACT, Australia
| | - Marek Mutwil
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
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Identification of a novel α-glucosidase inhibitor from Melastoma dodecandrum Lour. fruits and its effect on regulating postprandial blood glucose. Food Chem 2023; 399:133999. [PMID: 36037688 DOI: 10.1016/j.foodchem.2022.133999] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 08/18/2022] [Accepted: 08/20/2022] [Indexed: 12/22/2022]
Abstract
Melastoma dodecandrum Lour. (MDL) extracts have shown potent α-glucosidase inhibitory activity, suggesting MDL might be a good source of α-glucosidase inhibitors. The aim of the study was to identify compounds in MDL extracts with α-glucosidase inhibitory activities and evaluate their effect on postprandial blood glucose as well as elucidating the underlying mechanisms of inhibition. A total of 34 polyphenols were identified in MDL fruits, among which 10 anthocyanins and three proanthocyanidin derivatives were discovered for the first time. Dosing mice with MDL extracts (100 mg/kg body weight, by gavage) was associated with a significantly decrease in postprandial blood glucose concentrations after oral administration of maltose. The most potent α-glucosidase inhibitor was identified as casuarictin (IC50 of 0.21 μg/mL). Casuarictin bound competitively to α-glucosidase, occupying not only the catalytic site but also forming strong hydrogen bonds with α-glucosidase residues. Therefore, casuarictin derived from MDL fruits might be used as novel α-glucosidase inhibitor in functional foods or other dietary products.
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Rashwan AK, Karim N, Xu Y, Cui H, Fang J, Cheng K, Mo J, Chen W. Chemical composition, quality attributes and antioxidant activity of stirred-type yogurt enriched with Melastoma dodecandrum Lour fruit powder. Food Funct 2022; 13:1579-1592. [PMID: 35073395 DOI: 10.1039/d1fo03448k] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Incorporation of Melastoma dodecandrum Lour fruit powder as a promising functional ingredient for stirred-type yogurt (STY) improved physicochemical properties, polyphenol contents, antioxidant activity, microstructure, and texture of STY.
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Affiliation(s)
- Ahmed K. Rashwan
- Department of Traditional Chinese Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China
- Department of Food and Dairy Sciences, Faculty of Agriculture, South Valley University, Qena 83523, Egypt
| | - Naymul Karim
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Yang Xu
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Haoxin Cui
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Jie Fang
- Chemical Biology Center, Lishui Institute of Agriculture and Forestry Sciences, Lishui 323000, China
| | - Kejun Cheng
- Chemical Biology Center, Lishui Institute of Agriculture and Forestry Sciences, Lishui 323000, China
| | - Jianling Mo
- Department of Traditional Chinese Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China
| | - Wei Chen
- Department of Traditional Chinese Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China
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