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Chorazy N, Wojnar-Lason K, Sternak M, Pacia MZ. Vascular inflammation and biogenesis of lipid droplets; what is the link? Biochim Biophys Acta Mol Basis Dis 2024; 1870:167201. [PMID: 38677485 DOI: 10.1016/j.bbadis.2024.167201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/19/2024] [Accepted: 04/20/2024] [Indexed: 04/29/2024]
Affiliation(s)
- Natalia Chorazy
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics, Bobrzynskiego 14, Krakow, Poland; Jagiellonian University, Doctoral School of Exact and Natural Sciences, Lojasiewicza 11, Krakow, Poland
| | - Kamila Wojnar-Lason
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics, Bobrzynskiego 14, Krakow, Poland; Jagiellonian University, Chair of Pharmacology, Grzegorzecka 16, Krakow, Poland
| | - Magdalena Sternak
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics, Bobrzynskiego 14, Krakow, Poland
| | - Marta Z Pacia
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics, Bobrzynskiego 14, Krakow, Poland.
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Sertdemir AL, Şahin AT, Duran M, Çelik M, Tatar S, Oktay İ, Alsancak Y. Association between syndecan-4 and subclinical atherosclerosis in ankylosing spondylitis. Medicine (Baltimore) 2024; 103:e37019. [PMID: 38241528 PMCID: PMC10798725 DOI: 10.1097/md.0000000000037019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 01/02/2024] [Indexed: 01/21/2024] Open
Abstract
BACKGROUND Despite advances in the diagnosis and treatment of ankylosing spondylitis (AS), the risk of cardiovascular complications in AS patients is still higher than in the general population. Macrophages are at the intersection of the basic pathogenetic processes of AS and atherosclerosis. Although syndecan-4 (SDC4) mediates a variety of biological processes, the role of SDC4 in macrophage-mediated atherogenesis in AS patients remains unclear. Herein, we aimed to investigate the role of SDC4 in subclinical atherosclerosis in AS patients. METHODS Subjects were selected from eligible AS patients and control subjects without a prior history of AS who were referred to the rheumatology outpatient clinics. All participants' past medical records and clinical, and demographic characteristics were scanned. In addition, carotid intima-media thickness (CIMT) measurement and disease activity index measurement were applied to all patients. RESULTS According to our data, serum SDC4 level was significantly higher among AS patients compared with the control group (6.7 [1.5-35.0] ng/mL vs 5.1 [0.1-12.5] ng/mL, P < .001). The calculated CIMT was also significantly higher in AS patients than in the control group (0.6 [0.3-0.9] mm vs 0.4 (0.2-0.7), P < .001]. Additionally, serum C-reactive protein level and SDC4 level were independent predictors of AS and strongly associated with CIMT. Linear regression analysis showed that serum SDC4 level was the best predictor of CIMT (P = .004). CONCLUSION Our data indicate that serum SDC4 levels provide comprehensive information about the clinical activity of the disease and subclinical atherosclerosis in AS patients.
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Affiliation(s)
- Ahmet L. Sertdemir
- Department of Cardiology, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Ahmet T. Şahin
- Department of Cardiology, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Mustafa Duran
- Department of Cardiology, Konya City Hospital, Konya, Turkey
| | - Mustafa Çelik
- Department of Cardiology, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Sefa Tatar
- Department of Cardiology, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - İrem Oktay
- Department of Cardiology, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Yakup Alsancak
- Department of Cardiology, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
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Hao H, Li Z, Qiao SY, Qi Y, Xu XY, Si JY, Liu YH, Chang L, Shi YF, Xu B, Wei ZH, Kang LN. Empagliflozin ameliorates atherosclerosis via regulating the intestinal flora. Atherosclerosis 2023; 371:32-40. [PMID: 36990029 DOI: 10.1016/j.atherosclerosis.2023.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/07/2023] [Accepted: 03/14/2023] [Indexed: 03/31/2023]
Abstract
BACKGROUND AND AIMS Sodium-glucose cotransporter 2 inhibitor (SGLT2i) has been reported to attenuate atherosclerosis. Further, it has been suggested that intestinal flora influences atherosclerosis progression. Herein we aimed to investigate whether SGLT2i can alleviate atherosclerosis through intestinal flora. METHODS Six-week-old male ApoE-/- mice fed a high-fat diet were gavaged either empagliflozin (SGLT2i group, n = 9) or saline (Ctrl group, n = 6) for 12 weeks. Feces were collected from both groups at the end of the experiment for fecal microbiota transplantation (FMT). Another 12 six-week-old male ApoE-/- mice were fed a high-fat diet and received FMT with feces either from SGLT2i (FMT-SGLT2i group, n = 6) or from Ctrl (FMT-Ctrl group, n = 6) groups. Blood, tissue, and fecal samples were collected for subsequent analyses. RESULTS In comparison with Ctrl group, atherosclerosis was less severe in the SGLT2i group (p < 0.0001), and the richness of probiotic, such as f_Coriobacteriaceae, f_S24-7, f_Lachnospiraceae, and f_Adlercreutzia, was higher in feces. Besides, empagliflozin resulted in a significant reduction in the inflammatory response and altered intestinal flora metabolism. Interestingly, compared with FMT-Ctrl, FMT-SGLT2i also showed a reduction in atherosclerosis and systemic inflammatory response, as well as changes in the component of intestinal flora and pertinent metabolites similar to SGLT2i group. CONCLUSIONS Empagliflozin seems to mitigate atherosclerosis partly by regulating intestinal microbiota, and this anti-atherosclerotic effect can be transferred through intestinal flora transplantation.
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Affiliation(s)
- Han Hao
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China
| | - Zhu Li
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China
| | - Shi-Yang Qiao
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China
| | - Yu Qi
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China
| | - Xiao-Ying Xu
- Department of Cardiology, Nanjing Drum Hospital, Nanjing University of Chinese Medicine, No.138, Xian-Lin Avenue, Nanjing, 210008, China
| | - Jia-Yi Si
- Department of Cardiology, Nanjing Drum Hospital, Nanjing University of Chinese Medicine, No.138, Xian-Lin Avenue, Nanjing, 210008, China
| | - Yi-Hai Liu
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China
| | - Lei Chang
- Department of Cardiology, Nanjing Drum Tower Hospital, Clinical College of Nanjing Medical University, Nanjing, 210008, Jiangsu, China
| | - Yi-Fan Shi
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China
| | - Biao Xu
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China.
| | - Zhong-Hai Wei
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China.
| | - Li-Na Kang
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Cardiology, Affiliated Drum Tower Hospital, Medical School, Nanjing University, No.321, Zhongshan Road, Nanjing, 210008, China.
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Liu W, Cronin CG, Cao Z, Wang C, Ruan J, Pulikkot S, Hall A, Sun H, Groisman A, Chen Y, Vella AT, Hu L, Liang BT, Fan Z. Nexinhib20 Inhibits Neutrophil Adhesion and β 2 Integrin Activation by Antagonizing Rac-1-Guanosine 5'-Triphosphate Interaction. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 209:1574-1585. [PMID: 36165184 PMCID: PMC9529951 DOI: 10.4049/jimmunol.2101112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 08/03/2022] [Indexed: 11/07/2022]
Abstract
Neutrophils are critical for mediating inflammatory responses. Inhibiting neutrophil recruitment is an attractive approach for preventing inflammatory injuries, including myocardial ischemia-reperfusion (I/R) injury, which exacerbates cardiomyocyte death after primary percutaneous coronary intervention in acute myocardial infarction. In this study, we found out that a neutrophil exocytosis inhibitor Nexinhib20 inhibits not only exocytosis but also neutrophil adhesion by limiting β2 integrin activation. Using a microfluidic chamber, we found that Nexinhib20 inhibited IL-8-induced β2 integrin-dependent human neutrophil adhesion under flow. Using a dynamic flow cytometry assay, we discovered that Nexinhib20 suppresses intracellular calcium flux and β2 integrin activation after IL-8 stimulation. Western blots of Ras-related C3 botulinum toxin substrate 1 (Rac-1)-GTP pull-down assays confirmed that Nexinhib20 inhibited Rac-1 activation in leukocytes. An in vitro competition assay showed that Nexinhib20 antagonized the binding of Rac-1 and GTP. Using a mouse model of myocardial I/R injury, Nexinhib20 administration after ischemia and before reperfusion significantly decreased neutrophil recruitment and infarct size. Our results highlight the translational potential of Nexinhib20 as a dual-functional neutrophil inhibitory drug to prevent myocardial I/R injury.
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Affiliation(s)
- Wei Liu
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | - Chunxia G Cronin
- Pat and Jim Calhoun Cardiology Center, School of Medicine, UConn Health, Farmington, CT
| | - Ziming Cao
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | - Chengliang Wang
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | - Jianbin Ruan
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | - Sunitha Pulikkot
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | - Alexxus Hall
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | - Hao Sun
- Department of Medicine, University of California San Diego, La Jolla, CA
| | - Alex Groisman
- Department of Physics, University of California San Diego, La Jolla, CA
| | - Yunfeng Chen
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX
- Department of Pathology, University of Texas Medical Branch, Galveston, TX
| | - Anthony T Vella
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | - Liang Hu
- Academy of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China; and
| | - Bruce T Liang
- Pat and Jim Calhoun Cardiology Center, School of Medicine, UConn Health, Farmington, CT;
| | - Zhichao Fan
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT;
- Division of Inflammation Biology, La Jolla Institute for Immunology, La Jolla, CA
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Qin C, Yang S, Chu YH, Zhang H, Pang XW, Chen L, Zhou LQ, Chen M, Tian DS, Wang W. Signaling pathways involved in ischemic stroke: molecular mechanisms and therapeutic interventions. Signal Transduct Target Ther 2022; 7:215. [PMID: 35794095 PMCID: PMC9259607 DOI: 10.1038/s41392-022-01064-1] [Citation(s) in RCA: 151] [Impact Index Per Article: 75.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/01/2022] [Accepted: 06/15/2022] [Indexed: 02/07/2023] Open
Abstract
Ischemic stroke is caused primarily by an interruption in cerebral blood flow, which induces severe neural injuries, and is one of the leading causes of death and disability worldwide. Thus, it is of great necessity to further detailly elucidate the mechanisms of ischemic stroke and find out new therapies against the disease. In recent years, efforts have been made to understand the pathophysiology of ischemic stroke, including cellular excitotoxicity, oxidative stress, cell death processes, and neuroinflammation. In the meantime, a plethora of signaling pathways, either detrimental or neuroprotective, are also highly involved in the forementioned pathophysiology. These pathways are closely intertwined and form a complex signaling network. Also, these signaling pathways reveal therapeutic potential, as targeting these signaling pathways could possibly serve as therapeutic approaches against ischemic stroke. In this review, we describe the signaling pathways involved in ischemic stroke and categorize them based on the pathophysiological processes they participate in. Therapeutic approaches targeting these signaling pathways, which are associated with the pathophysiology mentioned above, are also discussed. Meanwhile, clinical trials regarding ischemic stroke, which potentially target the pathophysiology and the signaling pathways involved, are summarized in details. Conclusively, this review elucidated potential molecular mechanisms and related signaling pathways underlying ischemic stroke, and summarize the therapeutic approaches targeted various pathophysiology, with particular reference to clinical trials and future prospects for treating ischemic stroke.
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Affiliation(s)
- Chuan Qin
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Sheng Yang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yun-Hui Chu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Hang Zhang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiao-Wei Pang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lian Chen
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Luo-Qi Zhou
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Man Chen
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Dai-Shi Tian
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Wei Wang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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Pacia MZ, Chorazy N, Sternak M, Fels B, Pacia M, Kepczynski M, Kusche-Vihrog K, Chlopicki S. Rac1 regulates lipid droplets formation, nanomechanical, and nanostructural changes induced by TNF in vascular endothelium in the isolated murine aorta. Cell Mol Life Sci 2022; 79:317. [PMID: 35622139 PMCID: PMC9142475 DOI: 10.1007/s00018-022-04362-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/21/2022] [Accepted: 05/09/2022] [Indexed: 11/24/2022]
Abstract
Endothelial inflammation is recognized as a critical condition in the development of cardiovascular diseases. TNF-induced inflammation of endothelial cells is linked to the formation of lipid droplets, augmented cortical stiffness, and nanostructural endothelial plasma membrane remodelling, but the insight into the mechanism linking these responses is missing. In the present work, we determined the formation of lipid droplets (LDs), nanomechanical, and nanostructural responses in the model of TNF-activated vascular inflammation in the isolated murine aorta using Raman spectroscopy, fluorescence imaging, atomic force microscopy (AFM), and scanning electron microscopy (SEM). We analysed the possible role of Rac1, a major regulator of cytoskeletal organization, in TNF-induced vascular inflammation. We demonstrated that the formation of LDs, polymerization of F-actin, alterations in cortical stiffness, and nanostructural protuberances in endothelial plasma membrane were mediated by the Rac1. In particular, we revealed a significant role for Rac1 in the regulation of the formation of highly unsaturated LDs formed in response to TNF. Inhibition of Rac1 also downregulated the overexpression of ICAM-1 induced by TNF, supporting the role of Rac1 in vascular inflammation. Altogether, our results demonstrate that LDs formation, an integral component of vascular inflammation, is activated by Rac1 that also regulates nanomechanical and nanostructural alterations linked to vascular inflammation.
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Affiliation(s)
- Marta Z Pacia
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland.
| | - Natalia Chorazy
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland
| | - Magdalena Sternak
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland
| | - Benedikt Fels
- Institute of Physiology, University of Luebeck, 160 Ratzeburger Allee, 23562, Luebeck, Germany
- DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Michal Pacia
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387, Krakow, Poland
| | - Mariusz Kepczynski
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387, Krakow, Poland
| | - Kristina Kusche-Vihrog
- Institute of Physiology, University of Luebeck, 160 Ratzeburger Allee, 23562, Luebeck, Germany
- DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Stefan Chlopicki
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland
- Chair of Pharmacology, Jagiellonian University, 16 Grzegorzecka Str., 31-531, Krakow, Poland
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Salvianolic Acid B Suppresses ER Stress-Induced NLRP3 Inflammasome and Pyroptosis via the AMPK/FoxO4 and Syndecan-4/Rac1 Signaling Pathways in Human Endothelial Progenitor Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:8332825. [PMID: 35340217 PMCID: PMC8947883 DOI: 10.1155/2022/8332825] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 02/18/2022] [Indexed: 12/18/2022]
Abstract
Mounting evidence demonstrates uncontrolled endoplasmic reticulum (ER) stress responses can activate the inflammasome, which generally results in endothelial dysfunction, a major pathogenetic factor of chronic inflammatory diseases such as atherosclerosis. Salvianolic acid B (SalB), produced by Radix Salviae, exerts antioxidative and anti-inflammatory activities in multiple cell types. However, SalB's effects on ER stress-related inflammasome and endothelial dysfunction remain unknown. Here, we showed SalB substantially abrogated ER stress-induced cell death and reduction in capillary tube formation, with declined intracellular reactive oxygen species (ROS) amounts and restored mitochondrial membrane potential (MMP), as well as increased expression of HO-1 and SOD2 in bone marrow-derived endothelial progenitor cells (BM-EPCs). ER stress suppression by CHOP or caspase-4 siRNA transfection attenuated the protective effect of SalB. Additionally, SalB alleviated ER stress-mediated pyroptotic cell death via the suppression of TXNIP/NLRP3 inflammasome, as evidenced by reduced cleavage of caspase-1 and interleukin- (IL-) 1β and IL-18 secretion levels. Furthermore, this study provided a mechanistic basis that AMPK/FoxO4/KLF2 and Syndecan-4/Rac1/ATF2 signaling pathway modulation by SalB substantially prevented BM-EPCs damage associated with ER stress by decreasing intracellular ROS amounts and inducing NLRP3-dependent pyroptosis. In summary, our findings identify that ER stress triggered mitochondrial ROS release and NLRP3 generation in BM-EPCs, while SalB inhibits NLRP3 inflammasome-mediated pyroptotic cell death by regulating the AMPK/FoxO4/KLF2 and Syndecan-4/Rac1/ATF2 pathways. The current findings reveal SalB as a potential new candidate for the treatment of atherosclerotic heart disease.
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Chen CP, Wu YL, Chan KC, Ho HH, Wang CJ, Hsu LS. Mulberry polyphenols ameliorate atherogenic migration and proliferation by degradation of K-Ras and downregulation of its signals in vascular smooth muscle cell. Int J Med Sci 2022; 19:1557-1566. [PMID: 36185329 PMCID: PMC9515686 DOI: 10.7150/ijms.76006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/17/2022] [Indexed: 11/29/2022] Open
Abstract
Extra-proliferation and increased migration of vascular smooth cells con-tribute to the formation of atherosclerosis. Ras small G proteins play a critical role in the prolif-eration and migration of a wide range of cells. Mulberry, an economic fruit in Asia, exhibits anti-inflammation, anti-migration, and anti-oxidant properties. The mechanisms of action of mulberry extracts on K-Ras small G protein-induced proliferation and migration of vascular smooth muscle cell have not been extensively investigated. In this study, we explored the effects of mulberry polyphenol extracts (MPE) on the proliferation and migration of K-Ras-overexpressing A7r5 smooth muscle cells. The overexpression of K-Ras enhanced the ex-pression and activity of matrix metalloproteinase (MMP)-2, promoted vascular endothelial growth factor (VEGF) production, and eventually triggered the migration of A7r5 cells. Treatment with MPE attenuated K-Ras-induced phenomenon. In addition, MPE blocked K-Ras-induced actin fibril stress. MPE dose-dependently diminished K-Ras-induced Rho A, Rac1, CDC42, and phosphorylated focal adhesion kinase (FAK) expression. MPE elevated Rho B ex-pression. Phosphorylated AKT and glycogen synthase kinase (GSK) induced by K-Ras were also repressed by MPE treatment. MPE enhanced the interaction of IκB with NFκB. MPE restored the G0/G1 population and p21 and p27 expressions, which were repressed by K-Ras. Finally, MPE triggered the degradation of K-Ras by ubiquitination. MPE inhibited the migration and proliferation of vascular smooth cell through K-Ras-induced pathways and eventually pre-vented atherosclerosis.
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Affiliation(s)
- Ching-Pei Chen
- Division of Cardiovascular Surgery, Surgical Department, Chung Shan Medical University Hospital, Taichung 402, Taiwan
| | - Yi-Liang Wu
- Department of Surgery, School of Medicine, Chung-Shan Medical University, Taichung 402, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung 402, Taiwan
| | - Kuei-Chuan Chan
- Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, 402, Taiwan.,Institute of Biochemistry and Biotechnology, Chung Shan Medical University, Taichung, 402, Taiwan
| | - Hsieh-Hsun Ho
- Department of Health Diet and Industry Management, Chung Shan Medical University, Taichung 402, Taiwan
| | - Chau-Jong Wang
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung, 402, Taiwan.,Institute of Medicine, Chung Shan Medical University, Taichung, 402, Taiwan
| | - Li-Sung Hsu
- Institute of Medicine, Chung Shan Medical University, Taichung, 402, Taiwan.,Department of Medical Research, Chung Shan Medical University Hospital, Taichung 402, Taiwan
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