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Li Z, Xiong Q, Li Q, Tang L. Parthenolide ameliorates diabetic retinopathy by suppressing microglia-induced Müller cell gliosis and inflammation via the NF-κB signalling. Int Immunopharmacol 2025; 151:114219. [PMID: 40022819 DOI: 10.1016/j.intimp.2025.114219] [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: 11/06/2024] [Revised: 01/20/2025] [Accepted: 01/31/2025] [Indexed: 03/04/2025]
Abstract
Diabetic retinopathy (DR) is characterized by retinal inflammation and gliosis and the interaction between Müller cells and microglia plays a crucial role in DR pathogenesis. A sesquiterpene lactones, Parthenolide (PTL), has potent anti-inflammatory effects. This study aimed to evaluate the efficacy of PTL in ameliorating DR and the underlying mechanisms. A co-culture system of primary Müller cells and microglia under normoglycemic and hyperglycemic conditions was established. The study utilized immunofluorescent staining, Western blot analysis, ELISA, and molecular docking simulations to assess the influence of PTL on cellular interactions and NF-κB signaling modulation. Additionally, an in vivo diabetic mouse model was treated with varying doses of PTL to examine its effects on retinal pathologies, activity of Müller cells and microglia, and inflammatory responses. Co-culture with microglia exacerbated hyperglycemia-induced gliosis in Müller cells, indicated by increased GFAP expression and reduced GLAST and Kir4.1 levels. PTL treatment significantly attenuated these changes, reducing the pro-inflammatory cytokines and inhibiting microglia activation, as evidenced by decreased Iba-1 expression via suppressing NF-κB nuclear translocation. In diabetic mice, PTL demonstrated a dose-dependent protective effect against retinal damage and regulated Müller cell activation by inhibiting NF-κB activation. PTL effectively mitigates DR by suppressing microglia-induced Müller cell gliosis and inflammation, primarily via the NF-κB signaling. The findings highlight the potential of targeting Müller cell-microglia interactions in DR therapy, offering a novel approach to managing this complication. This study underscores the therapeutic promise of PTL in DR treatment, warranting further clinical exploration.
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Affiliation(s)
- Zhiliang Li
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan 430060, China.
| | - Qi Xiong
- Department of Ophthalmology, Key Laboratory for Molecular Diagnosis of Hubei Province, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430014, China.
| | - Qin Li
- Department of Ophthalmology, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang 441021, China.
| | - Lanlan Tang
- Department of Ophthalmology, Wuhan Third Hospital, Tongren Hospital of Wuhan University, Wuhan 430063, China.
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Tripathy B, Sahoo N, Sahoo SK. Antidiabetic Effect of Standardized Chrysanthemum rubellum Hydroethanolic Extract by Targeting α-Glucosidase and the PTP-1B Signaling Pathway for Alleviating Diabetes in Experimental Model. J Pharmacopuncture 2023; 26:319-326. [PMID: 38162472 PMCID: PMC10739470 DOI: 10.3831/kpi.2023.26.4.319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/09/2023] [Accepted: 12/11/2023] [Indexed: 01/03/2024] Open
Abstract
Objectives The study's goal was to find out whether Chrysanthemum rubellum extract has anti-diabetic properties by concentrating on α-glucosidase and the PTP-1B signaling pathway. C. rubellum flowers were used for extraction using Methanol/water (80/20) as solvent. Methods LC-MS techniques was used to check the presence of phytoconstituents present in C. rubellum extract. In vitro antidiabetic activity was evaluated using α-glucosidase inhibitory activity and PTP-1B signaling pathway. On Streptozotocin (STZ)-induced rats with diabetes, the in vivo antidiabetic efficacy was assessed using a test for oral glucose tolerance. Results The phytoconstituents identified in the extract of C. rubellum were apigenin, diosmin, myricetin, luteolin, luteolin-7-glucoside, and Quercitrin as compound 1-6, respectively. Results showed that diosmin exhibited highest α-glucosidase inhibitory activity i.e. 90.39%. The protein level of PTP-1B was lowered and the insulin signalling activity was directly increased by compounds 1-6. The maximum blood glucose levels were seen in all groups' OGTT findings at 30 minutes following glucose delivery, followed by gradual drops. In comparison to the control group, the extract's glucose levels were 141 mg/dL at 30 minutes before falling to 104 mg/dL after 120 minutes. The current study has demonstrated, in summary, that extract with phytoconstituents reduce blood sugar levels in rats. Conclusion This finding suggests that extract may reduce the chance of insulin resistance and shield against disorders like hyperglycemia.
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Affiliation(s)
- Bichitrananda Tripathy
- Department of Pharmacy, Centurion University of Technology and Management, Odisha, India
| | - Nityananda Sahoo
- Department of Pharmacy, Centurion University of Technology and Management, Odisha, India
| | - Sudhir Kumar Sahoo
- Department of Pharmacy, Royal College of Pharmacy and Health Sciences, Berhampur, Odisha, India
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Chen L, Sun J, Pan Z, Lu Y, Wang Z, Yang L, Sun G. Analysis of Chemical Constituents of Chrysanthemum morifolium Extract and Its Effect on Postprandial Lipid Metabolism in Healthy Adults. Molecules 2023; 28:579. [PMID: 36677639 PMCID: PMC9866508 DOI: 10.3390/molecules28020579] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/30/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
Chrysanthemum extract possesses antioxidant potential and carbohydrate and fat digestive enzyme inhibitory in vitro. However, no evidence supporting chrysanthemum in modulation of postprandial lipemia and antioxidant status in humans presently exists. This study was to analyze the composition of Imperial Chrysanthemum (IC) extract and determine the effect on changes in postprandial glycemic and lipemic response and antioxidant status in adults after consumption of a high-fat (HF) meal. UHPLC-MS method was used to analyze the components of two kinds of IC extracts (IC-P/IC-E) and in vitro antioxidant activities were evaluated using 1,1-diphenyl-2-picrylhydraxyl (DPPH), 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and Hydroxyl radical (HR) radical scavenging assays. Following a randomized design, 37 healthy adults (age, 25.2 ± 2.6 years, and BMI, 20.9 ± 1.5 kg/m2) were assigned to two groups that consumed the HF meal, or HF meal supplemented by IC extract. Blood samples were collected at fasting state and then at 0.5, 1, 2, 4, 6 and 8 h after the meal consumption. There were 12 compounds with relative content of more than 1% of the extracts, of which amino acid and derivatives, flavonoids, carboxylic acids and derivatives were the main components. Compared with IC-E, the contents of flavonoids in IC-P increased significantly (p < 0.05), and the cynaroside content exceeded 30%. In addition, IC-P showed strong free radical scavenging activity against DPPH, ABTS and HR radicals. Furthermore, according to repeated−measures ANOVA, significant differences were observed in the maximal changes for postprandial glucose, TG, T-AOC and MDA among the two groups. Postprandial glucose has significant difference between the two groups at 1 h after meal and the level in IC group was significantly lower than that in control group. No significant differences were observed in the incremental area under the curve (iAUC) among the two groups. IC significantly improved the serum antioxidant status, as characterized by increased postprandial serum T-AOC, SOD, GSH and decreased MDA. This finding suggests that IC can be used as a natural ingredient for reducing postprandial lipemia and improving the antioxidant status after consuming a HF meal.
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Affiliation(s)
- Lin Chen
- Department of Nutrition and Food Hygiene, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Healthy, Southeast University, Nanjing 210009, China
- College of Biology and Food Engineering, Technology Research Center of Characteristic Biological Resources in Northeast of Chongqing, Chongqing Three Gorges University, Chongqing 404000, China
| | - Jihan Sun
- Department of Nutrition and Food Hygiene, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Healthy, Southeast University, Nanjing 210009, China
| | - Zhengyu Pan
- Department of Nutrition and Food Hygiene, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Healthy, Southeast University, Nanjing 210009, China
| | - Yifei Lu
- Department of Nutrition and Food Hygiene, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Healthy, Southeast University, Nanjing 210009, China
| | - Zhaodan Wang
- College of Biology and Food Engineering, Technology Research Center of Characteristic Biological Resources in Northeast of Chongqing, Chongqing Three Gorges University, Chongqing 404000, China
| | - Ligang Yang
- Department of Nutrition and Food Hygiene, Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Healthy, Southeast University, Nanjing 210009, China
| | - Guiju Sun
- College of Biology and Food Engineering, Technology Research Center of Characteristic Biological Resources in Northeast of Chongqing, Chongqing Three Gorges University, Chongqing 404000, China
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Linarin, a Glycosylated Flavonoid, with Potential Therapeutic Attributes: A Comprehensive Review. Pharmaceuticals (Basel) 2021; 14:ph14111104. [PMID: 34832886 PMCID: PMC8621830 DOI: 10.3390/ph14111104] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/21/2021] [Accepted: 10/25/2021] [Indexed: 12/14/2022] Open
Abstract
Many flavonoids, as eminent phenolic compounds, have been commercialized and consumed as dietary supplements due to their incredible human health benefits. In the present study, a bioactive flavone glycoside linarin (LN) was designated to comprehensively overview its phytochemical and biological properties. LN has been characterized abundantly in the Cirsium, Micromeria, and Buddleja species belonging to Asteraceae, Lamiaceae, and Scrophulariaceae families, respectively. Biological assessments exhibited promising activities of LN, particularly, the remedial effects on central nervous system (CNS) disorders, whereas the remarkable sleep enhancing and sedative effects as well as AChE (acetylcholinesterase) inhibitory activity were highlighted. Of note, LN has indicated promising anti osteoblast proliferation and differentiation, thus a bone formation effect. Further biological and pharmacological assessments of LN and its optimized semi-synthetic derivatives, specifically its therapeutic characteristics on osteoarthritis and osteoporosis, might lead to uncovering potential drug candidates.
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Yoo A, Jang YJ, Ahn J, Jung CH, Seo HD, Ha TY. Chrysanthemi Zawadskii var. Latilobum Attenuates Obesity-Induced Skeletal Muscle Atrophy via Regulation of PRMTs in Skeletal Muscle of Mice. Int J Mol Sci 2020; 21:ijms21082811. [PMID: 32316567 PMCID: PMC7215836 DOI: 10.3390/ijms21082811] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/02/2020] [Accepted: 04/15/2020] [Indexed: 02/07/2023] Open
Abstract
As obesity promotes ectopic fat accumulation in skeletal muscle, resulting in impaired skeletal muscle and mitochondria function, it is associated with skeletal muscle loss and dysfunction. This study investigated whether Chrysanthemi zawadskii var. latilobum (CZH) protected mice against obesity-induced skeletal muscle atrophy and the underlying molecular mechanisms. High-fat diet (HFD)-induced obese mice were orally administered either distilled water, low-dose CZH (125 mg/kg), or high-dose CZH (250 mg/kg) for 8 w. CZH reduced obesity-induced increases in inflammatory cytokines levels and skeletal muscle atrophy, which is induced by expression of atrophic genes such as muscle RING-finger protein 1 and muscle atrophy F-box. CZH also improved muscle function according to treadmill running results and increased the muscle fiber size in skeletal muscle. Furthermore, CZH upregulated mRNA and protein levels of protein arginine methyltransferases (PRMT)1 and PRMT7, which subsequently attenuated mitochondrial dysfunction in the skeletal muscle of obese mice. We also observed that CZH significantly decreased PRMT6 mRNA and protein expression, which resulted in decreased muscle atrophy. These results suggest that CZH ameliorated obesity-induced skeletal muscle atrophy in mice via regulation of PRMTs in skeletal muscle.
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Affiliation(s)
- Ahyoung Yoo
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Korea; (A.Y.); (Y.J.J.); (J.A.); (C.H.J.); (H.D.S.)
- Department of Food and Nutrition, Chungnam National University, Daejeon 34134, Korea
| | - Young Jin Jang
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Korea; (A.Y.); (Y.J.J.); (J.A.); (C.H.J.); (H.D.S.)
| | - Jiyun Ahn
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Korea; (A.Y.); (Y.J.J.); (J.A.); (C.H.J.); (H.D.S.)
- Division of Food Biotechnology, University of Science and Technology, Daejeon 34113, Korea
| | - Chang Hwa Jung
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Korea; (A.Y.); (Y.J.J.); (J.A.); (C.H.J.); (H.D.S.)
- Division of Food Biotechnology, University of Science and Technology, Daejeon 34113, Korea
| | - Hyo Deok Seo
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Korea; (A.Y.); (Y.J.J.); (J.A.); (C.H.J.); (H.D.S.)
| | - Tae Youl Ha
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Korea; (A.Y.); (Y.J.J.); (J.A.); (C.H.J.); (H.D.S.)
- Division of Food Biotechnology, University of Science and Technology, Daejeon 34113, Korea
- Correspondence: ; Tel.: +82-63-219-9054
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Liu Y, Yang L, Zhang Y, Liu X, Wu Z, Gilbert RG, Deng B, Wang K. Dendrobium officinale polysaccharide ameliorates diabetic hepatic glucose metabolism via glucagon-mediated signaling pathways and modifying liver-glycogen structure. JOURNAL OF ETHNOPHARMACOLOGY 2020; 248:112308. [PMID: 31622745 DOI: 10.1016/j.jep.2019.112308] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 09/24/2019] [Accepted: 10/12/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Dendrobium officinale polysaccharide (DOP) is the main active ingredient of Dendrobium officinale Kimura & Migo, which is a precious traditional Chinese medicine and often used in treatment of hepatitis, diabetes, obesity and rheumatoid arthritis. AIM OF THE STUDY DOP exhibits significant hypoglycemic activity, while its mechanism remains unclear. The present study aims to investigate the hypoglycemic mechanisms of DOP based on the glucagon-mediated signaling pathways and the liver glycogen structure, which catalyze hepatic glucose metabolism, and provide new knowledge about the antidiabetic mechanism of DOP and further evidence for its clinical use for diabetes. MATERIALS AND METHODS DOP were obtained from the dry stems of Dendrobium officinale by water extraction and alcohol precipitation method. T2DM mice model was established by high-fat diet combined with streptozotocin. Liver histopathological changes were observed by H&E and PAS straining. Pancreatic histology was studied by H&E staining and immunofluorescence analysis. The levels of glucagon and insulin were detected by Elisa Kit and the hepatic glycogen content was detected by GOPOD. The expressions of the hepatic glycogen-related metabolism enzymes, hepatic gluconeogenesis enzymes, and the related protein in cAMP-PKA and Akt/FoxO1 signaling pathways were detected by western blots. Liver glycogen was extracted from the liver tissues by sucrose density gradient centrifugation, and size exclusion chromatography (SEC) was used to analyze the structure of liver glycogen. RESULTS DOP could significantly affect the glucagon-mediated signaling pathways, cAMP-PKA and Akt/FoxO1, to further promote hepatic glycogen synthesis, inhibit hepatic glycogen degradation and hepatic gluconeogenesis. Moreover, DOP could reverse the instability of the liver glycogen structure and thus probably suppressed glycogen degradation. Thus, DOP finally would ameliorate hepatic glucose metabolism via glucagon-mediated signaling pathways and modifying liver-glycogen structure in diabetic mice. CONCLUSIONS The hypoglycemic mechanism of DOP might be associated with the regulation of glucagon-mediated hepatic glycogen metabolism and gluconeogenesis, and of liver glycogen structure, contributing to improved hepatic glucose metabolism in diabetic mice.
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Affiliation(s)
- Yage Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Linlin Yang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Yu Zhang
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1227, Jiefang Road, 430030, Wuhan, China
| | - Xiaocui Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Zhijing Wu
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1227, Jiefang Road, 430030, Wuhan, China
| | - Robert G Gilbert
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, College of Agriculture, Yangzhou University, 225009, Yangzhou, Jiangsu Province, China; Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Queensland, 4072, Australia
| | - Bin Deng
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1227, Jiefang Road, 430030, Wuhan, China.
| | - Kaiping Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China.
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