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Bettiol A, Urban ML, Emmi G, Galora S, Argento FR, Fini E, Borghi S, Bagni G, Mattioli I, Prisco D, Fiorillo C, Becatti M. SIRT1 and thrombosis. Front Mol Biosci 2024; 10:1325002. [PMID: 38304233 PMCID: PMC10833004 DOI: 10.3389/fmolb.2023.1325002] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 12/29/2023] [Indexed: 02/03/2024] Open
Abstract
Thrombosis is a major cause of morbidity and mortality worldwide, with a complex and multifactorial pathogenesis. Recent studies have shown that SIRT1, a member of the sirtuin family of NAD + -dependent deacetylases, plays a crucial role in regulating thrombosis, modulating key pathways including endothelial activation, platelet aggregation, and coagulation. Furthermore, SIRT1 displays anti-inflammatory activity both in vitro, in vivo and in clinical studies, particularly via the reduction of oxidative stress. On these bases, several studies have investigated the therapeutic potential of targeting SIRT1 for the prevention of thrombosis. This review provides a comprehensive and critical overview of the main preclinical and clinical studies and of the current understanding of the role of SIRT1 in thrombosis.
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Affiliation(s)
- Alessandra Bettiol
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze, Italy
| | - Maria Letizia Urban
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze, Italy
| | - Giacomo Emmi
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze, Italy
| | - Silvia Galora
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Firenze, Firenze, Italy
| | - Flavia Rita Argento
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Firenze, Firenze, Italy
| | - Eleonora Fini
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Firenze, Firenze, Italy
| | - Serena Borghi
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Firenze, Firenze, Italy
| | - Giacomo Bagni
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze, Italy
| | - Irene Mattioli
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze, Italy
| | - Domenico Prisco
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze, Italy
| | - Claudia Fiorillo
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Firenze, Firenze, Italy
| | - Matteo Becatti
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Firenze, Firenze, Italy
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Xue J, Zhang Z, Sun Y, Jin D, Guo L, Li X, Zhao D, Feng X, Qi W, Zhu H. Research Progress and Molecular Mechanisms of Endothelial Cells Inflammation in Vascular-Related Diseases. J Inflamm Res 2023; 16:3593-3617. [PMID: 37641702 PMCID: PMC10460614 DOI: 10.2147/jir.s418166] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 08/02/2023] [Indexed: 08/31/2023] Open
Abstract
Endothelial cells (ECs) are widely distributed inside the vascular network, forming a vital barrier between the bloodstream and the walls of blood vessels. These versatile cells serve myriad functions, including the regulation of vascular tension and the management of hemostasis and thrombosis. Inflammation constitutes a cascade of biological responses incited by biological, chemical, or physical stimuli. While inflammation is inherently a protective mechanism, dysregulated inflammation can precipitate a host of vascular pathologies. ECs play a critical role in the genesis and progression of vascular inflammation, which has been implicated in the etiology of numerous vascular disorders, such as atherosclerosis, cardiovascular diseases, respiratory diseases, diabetes mellitus, and sepsis. Upon activation, ECs secrete potent inflammatory mediators that elicit both innate and adaptive immune reactions, culminating in inflammation. To date, no comprehensive and nuanced account of the research progress concerning ECs and inflammation in vascular-related maladies exists. Consequently, this review endeavors to synthesize the contributions of ECs to inflammatory processes, delineate the molecular signaling pathways involved in regulation, and categorize and consolidate the various models and treatment strategies for vascular-related diseases. It is our aspiration that this review furnishes cogent experimental evidence supporting the established link between endothelial inflammation and vascular-related pathologies, offers a theoretical foundation for clinical investigations, and imparts valuable insights for the development of therapeutic agents targeting these diseases.
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Affiliation(s)
- Jiaojiao Xue
- College of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Ziwei Zhang
- College of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Yuting Sun
- Department of Endocrinology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, People’s Republic of China
| | - Di Jin
- Department of Nephrology, First Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Liming Guo
- College of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Xiangyan Li
- Northeast Asia Research Institute of Traditional Chinese Medicine, Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Ministry of Education, Jilin Provincial Key Laboratory of Biomacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Daqing Zhao
- Northeast Asia Research Institute of Traditional Chinese Medicine, Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Ministry of Education, Jilin Provincial Key Laboratory of Biomacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Xiaochun Feng
- Department of Nephropathy and Rheumatology in Children, Children’s Medical Center, First Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Wenxiu Qi
- Northeast Asia Research Institute of Traditional Chinese Medicine, Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Ministry of Education, Jilin Provincial Key Laboratory of Biomacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, People’s Republic of China
| | - Haoyu Zhu
- Department of Nephropathy and Rheumatology in Children, Children’s Medical Center, First Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, People’s Republic of China
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Falco L, Tessitore V, Ciccarelli G, Malvezzi M, D'Andrea A, Imbalzano E, Golino P, Russo V. Antioxidant Properties of Oral Antithrombotic Therapies in Atherosclerotic Disease and Atrial Fibrillation. Antioxidants (Basel) 2023; 12:1185. [PMID: 37371915 DOI: 10.3390/antiox12061185] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 05/22/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
The thrombosis-related diseases are one of the leading causes of illness and death in the general population, and despite significant improvements in long-term survival due to remarkable advances in pharmacologic therapy, they continue to pose a tremendous burden on healthcare systems. The oxidative stress plays a role of pivotal importance in thrombosis pathophysiology. The anticoagulant and antiplatelet drugs commonly used in the management of thrombosis-related diseases show several pleiotropic effects, beyond the antithrombotic effects. The present review aims to describe the current evidence about the antioxidant effects of the oral antithrombotic therapies in patients with atherosclerotic disease and atrial fibrillation.
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Affiliation(s)
- Luigi Falco
- Cardiology Unit, Department of Medical Translational Science, University of Campania "Luigi Vanvitelli"-Monaldi Hospital, 80126 Naples, Italy
| | - Viviana Tessitore
- Cardiology Unit, Department of Medical Translational Science, University of Campania "Luigi Vanvitelli"-Monaldi Hospital, 80126 Naples, Italy
| | - Giovanni Ciccarelli
- Cardiology Unit, Department of Medical Translational Science, University of Campania "Luigi Vanvitelli"-Monaldi Hospital, 80126 Naples, Italy
| | - Marco Malvezzi
- Cardiology Unit, Department of Medical Translational Science, University of Campania "Luigi Vanvitelli"-Monaldi Hospital, 80126 Naples, Italy
| | | | - Egidio Imbalzano
- Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy
| | - Paolo Golino
- Cardiology Unit, Department of Medical Translational Science, University of Campania "Luigi Vanvitelli"-Monaldi Hospital, 80126 Naples, Italy
| | - Vincenzo Russo
- Cardiology Unit, Department of Medical Translational Science, University of Campania "Luigi Vanvitelli"-Monaldi Hospital, 80126 Naples, Italy
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Yeh CH, Chung WJ, Chen TY, Wu PJ, Tseng CH, Lee CH, Cheng CI. The Impact of FEV1/FVC Ratio on the Clinical Outcomes in Acute Coronary Syndrome Patients Treated with Dual Anti-Platelet Agents. Acta Cardiol Sin 2023; 39:116-126. [PMID: 36685154 PMCID: PMC9829852 DOI: 10.6515/acs.202301_39(1).20220601a] [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] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 06/01/2022] [Indexed: 01/24/2023]
Abstract
Background Few studies have investigated the clinical efficacy and pulmonary side effects of different P2Y12 inhibitors in acute coronary syndrome (ACS) patients. The aim of this study was to explore the impact of forced expiratory volume in 1 second over forced vital capacity (FEV1/FVC) ratio on the clinical outcomes in ACS patients treated with dual antiplatelet therapy after percutaneous coronary intervention (PCI). Methods ACS patients who underwent PCI, had documented pre-existing spirometry tests, and received aspirin with either ticagrelor or clopidogrel were enrolled for retrospective analysis. Results Of the enrolled ACS patients, 275 and 247 received ticagrelor and clopidogrel, respectively. The incidence of wheeze was significantly higher in the ticagrelor group compared to the clopidogrel group within 360 days (14.91% vs. 8.09%, p = 0.016). Multivariable analysis revealed that ticagrelor treatment, as compared to clopidogrel treatment, independently predicted 1-year hospitalization for acute exacerbation (AE) of obstructive airway disease (hazard ratio: 3.44; 95% confidence interval: 1.92 to 6.15; p < 0.01). The receiver operating characteristic curve indicated that an FEV1/FVC ratio of 63.85% had the highest sensitivity and specificity for predicting the incidence of AE of obstructive airway disease within 1 year (p < 0.001). The 1-year hospitalization rate for AE of obstructive airway disease was significantly higher in the ticagrelor group when the FEV1/FVC ratio was < 63%. Conclusions This study demonstrated higher incidence of wheeze and hospitalization for AE of obstructive airway disease in ACS patients treated with ticagrelor compared to clopidogrel. Furthermore, the FEV1/FVC ratio ≤ 63% in the ACS patients predicted hospitalization for AE of obstructive airway disease in 1 year.
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Affiliation(s)
- Chia-Hung Yeh
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital
| | - Wen-Jung Chung
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital
| | - Tien-Yu Chen
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital
| | - Po-Jui Wu
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital
| | - Chien-Hao Tseng
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital
| | - Chien-Ho Lee
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital
| | - Cheng-I Cheng
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital
- Chang Gung University School of Medicine, Kaohsiung, Taiwan
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Chyrchel B, Kruszelnicka O, Surdacki A. Endothelial biomarkers and platelet reactivity on ticagrelor versus clopidogrel in patients after acute coronary syndrome with and without concomitant type 2 diabetes: a preliminary observational study. Cardiovasc Diabetol 2022; 21:249. [PMID: 36397167 PMCID: PMC9670560 DOI: 10.1186/s12933-022-01685-4] [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] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 11/03/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Pleiotropic effects have been implicated in clinical benefits of ticagrelor compared to thienopyridine P2Y12 antagonists. There are conflicting data regarding effects of ticagrelor vs. thienopyridine P2Y12 blockers on endothelial function. Our aim was to compare endothelial biomarkers and their relations with platelet reactivity in real-world patients after acute coronary syndrome (ACS) on maintenance dual antiplatelet therapy (DAPT) with ticagrelor or clopidogrel stratified by diabetes status. METHODS Biochemical indices of endothelial dysfunction/activation and platelet reactivity by multiple electrode aggregometry were compared in 126 stable post-ACS subjects (mean age: 65 ± 10 years, 92 men and 34 women), including patients with (n = 61) or without (n = 65) coexistent type 2 diabetes (T2DM) on uneventful maintenance DAPT with either ticagrelor (90 mg b.d.) or clopidogrel (75 mg o.d.) in addition to low-dose aspirin. Exclusion criteria included a complicated in-hospital course, symptomatic heart failure, left ventricular ejection fraction < 40% and relevant coexistent diseases except for well-controlled diabetes, mild renal insufficiency or hypertension. RESULTS Clinical characteristics were similar in patients on ticagrelor (n = 62) and clopidogrel (n = 64). The adenosine diphosphate-induced platelet aggregation and circulating soluble P-selectin (sP-selectin) were decreased in ticagrelor users irrespective of T2DM status (p < 0.001 and p < 0.01 for platelet reactivity and sP-selectin, respectively). Plasma levels of soluble vascular cell adhesion molecule-1 (sVCAM-1) were lower in T2DM subjects on ticagrelor vs. clopidogrel (758 ± 162 vs. 913 ± 217 µg/L, p < 0.01). In contrast, plasma sVCAM-1 was similar in non-diabetic patients on ticagrelor and clopidogrel (872 ± 203 vs. 821 ± 210 µg/L, p > 0.7). The concentrations of sE-selectin, monocyte chemoattractant protein-1 and asymmetric dimethylarginine did not differ according to the type of P2Y12 antagonist regardless of T2DM status. Platelet reactivity was unrelated to any endothelial biomarker in subjects with or without T2DM. CONCLUSIONS Our preliminary findings may suggest an association of ticagrelor-based maintenance DAPT with favorable endothelial effects compared to clopidogrel users in stable post-ACS patients with T2DM. If proven, this could contribute to more pronounced clinical benefits of ticagrelor in diabetic subjects.
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Affiliation(s)
- Bernadeta Chyrchel
- grid.5522.00000 0001 2162 9631Second Department of Cardiology, Institute of Cardiology, Faculty of Medicine, Jagiellonian University Medical College, 2 Jakubowskiego Street, 30-688 Cracow, Poland ,grid.412700.00000 0001 1216 0093Department of Cardiology and Cardiovascular Interventions, University Hospital, 2 Jakubowskiego Street, 30-688 Cracow, Poland
| | - Olga Kruszelnicka
- grid.5522.00000 0001 2162 9631Department of Coronary Artery Disease and Heart Failure, Institute of Cardiology, Faculty of Medicine, Jagiellonian University Medical College, 80 Prądnicka Street, 31-202 Cracow, Poland
| | - Andrzej Surdacki
- grid.5522.00000 0001 2162 9631Second Department of Cardiology, Institute of Cardiology, Faculty of Medicine, Jagiellonian University Medical College, 2 Jakubowskiego Street, 30-688 Cracow, Poland ,grid.412700.00000 0001 1216 0093Department of Cardiology and Cardiovascular Interventions, University Hospital, 2 Jakubowskiego Street, 30-688 Cracow, Poland
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Caliceti C, Malaguti M, Marracino L, Barbalace MC, Rizzo P, Hrelia S. Agri-Food Waste from Apple, Pear, and Sugar Beet as a Source of Protective Bioactive Molecules for Endothelial Dysfunction and Its Major Complications. Antioxidants (Basel) 2022; 11:1786. [PMID: 36139860 DOI: 10.3390/antiox11091786] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 07/27/2022] [Revised: 09/01/2022] [Accepted: 09/07/2022] [Indexed: 11/16/2022] Open
Abstract
Endothelial damage is recognized as the initial step that precedes several cardiovascular diseases (CVD), such as atherosclerosis, hypertension, and coronary artery disease. It has been demonstrated that the best treatment for CVD is prevention, and, in the frame of a healthy lifestyle, the consumption of vegetables, rich in bioactive molecules, appears effective at reducing the risk of CVD. In this context, the large amount of agri-food industry waste, considered a global problem due to its environmental and economic impact, represents an unexplored source of bioactive compounds. This review provides a summary regarding the possible exploitation of waste or by-products derived by the processing of three traditional Italian crops-apple, pear, and sugar beet-as a source of bioactive molecules to protect endothelial function. Particular attention has been given to the bioactive chemical profile of these pomaces and their efficacy in various pathological conditions related to endothelial dysfunction. The waste matrices of apple, pear, and sugar beet crops can represent promising starting material for producing "upcycled" products with functional applications, such as the prevention of endothelial dysfunction linked to cardiovascular diseases.
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Meskauskaite U, Andruskeviciute S, Ciapiene I, Giedraitiene A, Lesauskaite V, Tatarunas V. Pleiotropic Effects of Ticagrelor: Influence on CYP4F2 Gene and Protein Expression in HUVEC and HepG2, and Escherichia coli Bacterial Survival. Drug Des Devel Ther 2022; 16:2559-2568. [PMID: 35959420 PMCID: PMC9359174 DOI: 10.2147/dddt.s357985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 07/05/2022] [Indexed: 11/23/2022] Open
Abstract
Background Antiplatelet drugs, such as ticagrelor, which target platelet P2Y12 receptors, are used for prevention of ischemic heart disease. Ticagrelor is also known to have pleiotropic effects of unknown mechanisms. Ticagrelor could influence the expression of molecules involved in resolution of inflammation. This study aimed to investigate if ticagrelor could change the expression of CYP4F2 and its encoded protein concentration and, additionally, to determine ticagrelor possible antibacterial activity against gram-negative bacteria. Methods CYP4F2 expression was determined in HUVEC and HepG2 cell lines by qPCR. CYP4F2 protein concentration was determined by ELISA. Antibiotic susceptibility testing was performed using a disc diffusion method. Results Ticagrelor was observed to reduce the expression of CYP4F2 in HUVEC and HepG2 cell lines. It also reduced CYP4F2 protein levels in HUVEC cells. Ticagrelor had no bactericidal activity against gram-negative third generation cephalosporin resistant E. coli. Conclusion Ticagrelor reduced CYP4F2 protein concentration in HUVEC, and CYP4F2 expression in HUVEC and HepG2 cells, but had no effect on third-generation cephalosporin-resistant E. coli strains.
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Affiliation(s)
- Ugne Meskauskaite
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | | | - Ieva Ciapiene
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Agne Giedraitiene
- Institute of Microbiology and Virology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Vaiva Lesauskaite
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Vacis Tatarunas
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
- Correspondence: Vacis Tatarunas, Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania, Tel +370 37302874, Email
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Tam CCF, Chan YH, Wong YK, Li Z, Zhu X, Su KJ, Ganguly A, Hwa K, Ling XB, Tse HF. Multi-Omics Signatures Link to Ticagrelor Effects on Vascular Function in Patients With Acute Coronary Syndrome. Arterioscler Thromb Vasc Biol 2022; 42:789-798. [PMID: 35387483 DOI: 10.1161/atvbaha.121.317513] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Long-term antiplatelet agents including the potent P2Y12 antagonist ticagrelor are indicated in patients with a previous history of acute coronary syndrome. We sought to compare the effect of ticagrelor with that of aspirin monotherapy on vascular endothelial function in patients with prior acute coronary syndrome. METHODS This was a prospective, single center, parallel group, investigator-blinded randomized controlled trial. We randomized 200 patients on long-term aspirin monotherapy with prior acute coronary syndrome in a 1:1 fashion to receive ticagrelor 60 mg BD (n=100) or aspirin 100 mg OD (n=100). The primary end point was change from baseline in brachial artery flow-mediated dilation at 12 weeks. Secondary end points were changes to platelet activation marker (CD41_62p) and endothelial progenitor cell (CD34/133) count measured by flow cytometry, plasma level of adenosine, IL-6 (interleukin-6) and EGF (epidermal growth factor), and multi-omics profiling at 12 weeks. RESULTS After 12 weeks, brachial flow-mediated dilation was significantly increased in the ticagrelor group compared with the aspirin group (ticagrelor: 3.48±3.48% versus aspirin: -1.26±2.85%, treatment effect 4.73 [95% CI, 3.85-5.62], P<0.001). Nevertheless ticagrelor treatment for 12 weeks had no significant effect on platelet activation markers, circulating endothelial progenitor cell count or plasma level of adenosine, IL-6, and EGF (all P>0.05). Multi-omics pathway assessment revealed that changes in the metabolism and biosynthesis of amino acids (cysteine and methionine metabolism; phenylalanine, tyrosine, and tryptophan biosynthesis) and phospholipids (glycerophosphoethanolamines and glycerophosphoserines) were associated with improved brachial artery flow-mediated dilation in the ticagrelor group. CONCLUSIONS In patients with prior acute coronary syndrome, ticagrelor 60 mg BD monotherapy significantly improved brachial flow-mediated dilation compared with aspirin monotherapy and was associated with significant changes in metabolomic and lipidomic signatures. REGISTRATION URL: https://www. CLINICALTRIALS gov; Unique identifier: NCT03881943.
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Affiliation(s)
- Chor-Cheung Frankie Tam
- Division of Cardiology, Queen Mary Hospital, The University of Hong Kong, China (C.-C.F.T., Y.-H.C., Y.-K.W., H.-F.T.)
| | - Yap-Hang Chan
- Division of Cardiology, Queen Mary Hospital, The University of Hong Kong, China (C.-C.F.T., Y.-H.C., Y.-K.W., H.-F.T.)
| | - Yuen-Kwun Wong
- Division of Cardiology, Queen Mary Hospital, The University of Hong Kong, China (C.-C.F.T., Y.-H.C., Y.-K.W., H.-F.T.)
| | - Zhen Li
- mProbe Inc, Mountain View, CA (Z.L., X.Z.)
| | - Xiurui Zhu
- mProbe Inc, Mountain View, CA (Z.L., X.Z.)
| | | | - Anindita Ganguly
- Center for Biomedical Industry, Department of Molecular Science and Engineering National Taipei University of Technology, Taiwan (A.G., K.H.)
| | - Kuoyuan Hwa
- Center for Biomedical Industry, Department of Molecular Science and Engineering National Taipei University of Technology, Taiwan (A.G., K.H.)
| | | | - Hung-Fat Tse
- Division of Cardiology, Queen Mary Hospital, The University of Hong Kong, China (C.-C.F.T., Y.-H.C., Y.-K.W., H.-F.T.).,Cardiac and Vascular Center, Hong Kong University Shenzhen Hospital, China (H.-F.T.).,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, the University of Hong Kong, China (H.-F.T.).,Center for Translational Stem Cell Biology, Hong Kong SAR, China (H.-F.T.)
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Pavasini R, Campo G. Ticagrelor and Endothelial Function: An Effect That Persists Far From the Acute Phase and in Monotherapy. Arterioscler Thromb Vasc Biol 2022; 42:799-801. [PMID: 35443794 DOI: 10.1161/atvbaha.122.317693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Rita Pavasini
- UO Cardiologia, Azienda Ospedaliero Universitaria di Ferrara, Italy
| | - Gianluca Campo
- UO Cardiologia, Azienda Ospedaliero Universitaria di Ferrara, Italy
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Cheng T, Li X, Chen J, Yang L, Liu J, Song G, Ma H. Investigation of hub genes involved in Turner syndrome using biological informatics methods. Medicine (Baltimore) 2022; 101:e29069. [PMID: 35356930 PMCID: PMC10684194 DOI: 10.1097/md.0000000000029069] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 02/25/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND This study aimed to explore candidate genes and their potential interaction mechanism critical to the pathophysiology of Turner syndrome by using the Gene Expression Omnibus database. METHODS GSE58435 data set was obtained by querying the Gene Expression Omnibus database. Differentially expressed genes (DEGs) were screened using R and subsequently annotated by Gene Ontology. Functional enrichment analysis was performed based on the Kyoto Encyclopedia of Genes and Genomes database for annotation, visualization, and integrated discovery. A protein-protein interaction network of different genes was constructed based on the STRING database, in which hub genes were explored through Cytoscape software. The expression of the hub genes was verified by analyzing the gene expression in the GSE46687 data set. RESULTS A total of 733 differential genes were identified. These differentially expressed genes were significantly enriched in nucleoplasm and nucleus. Their molecular function was concentrated on DNA binding and transcription, coronary artery, and adipose tissue development. According to the annotation of Kyoto Encyclopedia of Genes and Genomes, the identified DEGs were mainly enriched in inflammatory mediator regulation of TRP channels, osteoclast differentiation. A total of 10 hub genes (HIST1H2BA, TRIM71, HIST1H2BB, HIST1H4D, TNF, TP53BP1, CDCA8, EGF, HMG20B, and BCL9) were identified from the constructed protein-protein interaction network. These genes were discovered to be highly expressed in osteoclasts, ovaries, digestive tract, blood, and lymphatic tissues through the online application of human protein atlas. CONCLUSION In this study, 733 DEGs and 10 hub genes were identified. They would be new candidate targets in Turner syndrome.
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Affiliation(s)
| | | | | | | | | | | | - Huijuan Ma
- Correspondence: Huijuan Ma, Hebei General Hospital, Shijiazhuang, Hebei, China (e-mail: ).
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Hu N, Zou L. Multiple functions of Hes genes in the proliferation and differentiation of neural stem cells. Ann Anat 2021; 239:151848. [PMID: 34715307 DOI: 10.1016/j.aanat.2021.151848] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 07/24/2021] [Accepted: 10/18/2021] [Indexed: 12/20/2022]
Abstract
The HES proteins (hairy and Enhancer of split (E(spl)) homologs) are basic helix-loop-helix (bHLH) transcription factors that regulate the proliferation and differentiation of stem cells. Family members HES1, 3, and 5 are all critical regulators of nervous system development. The Hes genes exhibit oscillatory expression levels, and this dynamic expression allows for the complex regulation of numerous downstream genes such as Ascl1, Neurog2, Olig2 involved in the differentiation of specific cell types. In addition, HES proteins act as hubs for the molecule crosstalk among Notch, Wnt, and other signaling pathways that regulate nervous system development.
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Affiliation(s)
- Nan Hu
- Department of Human Anatomy, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China
| | - Linqing Zou
- Department of Human Anatomy, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China.
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Chen JX, He S, Wang YJ, Gan XK, Zhou YQ, Hua L, Hou C, Zhang S, Zhou HX, Jia EZ. Comprehensive Analysis of mRNA Expression Profiling and Identification of Potential Diagnostic Biomarkers in Coronary Artery Disease. ACS Omega 2021; 6:24016-24026. [PMID: 34568680 PMCID: PMC8459403 DOI: 10.1021/acsomega.1c03171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Indexed: 05/26/2023]
Abstract
The aim of this study is to investigate mRNA expression profiling by RNA sequencing (RNA-seq) in patients with coronary artery disease (CAD) and validate differentially expressed genes (DEGs) as novel biomarkers for CAD. Transcriptome-wide mRNA expression analysis of peripheral blood mononuclear cells was performed in five CAD patients and five controls. Functional enrichment analyses, protein-protein interaction network construction, and hub gene selection were further conducted. Relative expression levels of hub genes were validated by quantitative reverse transcription PCR in larger cohorts. Spearman correlation test and multiple linear regression analysis were applied to examine the relationship between confounding factors with severity of coronary artery atherosclerosis. Receiver operating characteristic (ROC) curve analysis was adopted to identify potentially diagnostic biomarkers for CAD. A total of 527 upregulated and 653 downregulated mRNAs were identified as DEGs in CAD patients. The relative expression levels of beta-transducin repeat containing E3 ubiquitin protein ligase (BTRC), F-box and leucine-rich repeat protein 4 (FBXL4), ubiquitin conjugating enzyme E2 D2 (UBE2D2), and ankyrin repeat and SOCS box containing 1 (ASB1) were significantly different between two groups (all p ≤ 0.05). The severity of coronary artery atherosclerosis was negatively associated with the BTRC gene relative expression level (r = -0.323, p < 0.001) and positively with UBE2D2 (r = 0.285, p < 0.001). ROC analysis of BTRC and UBE2D2 genes showed that the areas under the curve were 0.782 (95% CI: 0.720-0.845, p < 0.001) and 0.753 (95% CI: 0.681-0.824, p < 0.001), respectively. We described the characteristics of mRNA expression in the peripheral blood of CAD patients and controls by RNA-seq. Combined with Spearman correlation analysis and ROC analyses, BTRC and UBE2D2 genes had significantly diagnostic values, which may have potential to act as novel diagnostic biomarkers and therapeutic targets for CAD.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - En-Zhi Jia
- . Phone: +86-13951623205. Fax: 0086-025-84352775
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Akkaif MA, Ng ML, Sk Abdul Kader MA, Daud NAA, Sha'aban A, Ibrahim B. A review of the effects of ticagrelor on adenosine concentration and its clinical significance. Pharmacol Rep 2021; 73:1551-1564. [PMID: 34283374 DOI: 10.1007/s43440-021-00309-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Ticagrelor is an oral antiplatelet drug that can reversibly bind to the platelet P2Y12 receptor. Ticagrelor is metabolized mainly by CYP3A4 and produces a rapid blood concentration-dependent platelet inhibitory effect. Unlike other P2Y12 receptor antagonists, many clinical features of ticagrelor are not related to P2Y12 receptor antagonism. PURPOSE This review aims to gather existing literature on the clinical effects of ticagrelor after inhibiting adenosine uptake. METHODOLOGY The current study reviewed literature related to the effects of ticagrelor on adenosine metabolism. The review also examined the drug's biological effects and clinical characteristics to see how it could be used in a clinical setting. RESULTS Many studies have shown that ticagrelor can inhibit equilibrative nucleoside transporter 1 (ENT1). This inhibition leads to intracellular adenosine uptake, increased adenosine half-life and plasma concentration levels and an enhanced adenosine-mediated biological effect. CONCLUSIONS Based on the studies reviewed, it was found that ticagrelor essentially inhibits adenosine absorption of adenosine into cells through ENT1, which increases the concentration in the blood and subsequently increases the protection of the heart muscle by adenosine. It also prevents platelet aggregation, and extends the biological effects of coronary arteries. Moreover, it leads to a lower mortality rate in acute coronary syndrome (ACS) patients.
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Affiliation(s)
- Mohammed Ahmed Akkaif
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800, Gelugor, Penang, Malaysia
| | - Mei Li Ng
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200, Gelugor, Penang, Malaysia
| | | | - Nur Aizati Athirah Daud
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800, Gelugor, Penang, Malaysia
| | - Abubakar Sha'aban
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800, Gelugor, Penang, Malaysia
| | - Baharudin Ibrahim
- Faculty of Pharmacy, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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Alur V, Raju V, Vastrad B, Tengli A, Vastrad C, Kotturshetti S. Integrated bioinformatics analysis reveals novel key biomarkers and potential candidate small molecule drugs in gestational diabetes mellitus. Biosci Rep 2021; 41:BSR20210617. [PMID: 33890634 DOI: 10.1042/BSR20210617] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 02/08/2023] Open
Abstract
Gestational diabetes mellitus (GDM) is the metabolic disorder that appears during pregnancy. The current investigation aimed to identify central differentially expressed genes (DEGs) in GDM. The transcription profiling by array data (E-MTAB-6418) was obtained from the ArrayExpress database. The DEGs between GDM samples and non-GDM samples were analyzed. Functional enrichment analysis were performed using ToppGene. Then we constructed the protein–protein interaction (PPI) network of DEGs by the Search Tool for the Retrieval of Interacting Genes database (STRING) and module analysis was performed. Subsequently, we constructed the miRNA–hub gene network and TF–hub gene regulatory network. The validation of hub genes was performed through receiver operating characteristic curve (ROC). Finally, the candidate small molecules as potential drugs to treat GDM were predicted by using molecular docking. Through transcription profiling by array data, a total of 869 DEGs were detected including 439 up-regulated and 430 down-regulated genes. Functional enrichment analysis showed these DEGs were mainly enriched in reproduction, cell adhesion, cell surface interactions at the vascular wall and extracellular matrix organization. Ten genes, HSP90AA1, EGFR, RPS13, RBX1, PAK1, FYN, ABL1, SMAD3, STAT3 and PRKCA were associated with GDM, according to ROC analysis. Finally, the most significant small molecules were predicted based on molecular docking. This investigation identified hub genes, signal pathways and therapeutic agents, which might help us, enhance our understanding of the mechanisms of GDM and find some novel therapeutic agents for GDM.
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Medina-Leyte DJ, Zepeda-García O, Domínguez-Pérez M, González-Garrido A, Villarreal-Molina T, Jacobo-Albavera L. Endothelial Dysfunction, Inflammation and Coronary Artery Disease: Potential Biomarkers and Promising Therapeutical Approaches. Int J Mol Sci 2021; 22:ijms22083850. [PMID: 33917744 PMCID: PMC8068178 DOI: 10.3390/ijms22083850] [Citation(s) in RCA: 133] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/24/2021] [Accepted: 03/25/2021] [Indexed: 12/14/2022] Open
Abstract
Coronary artery disease (CAD) and its complications are the leading cause of death worldwide. Inflammatory activation and dysfunction of the endothelium are key events in the development and pathophysiology of atherosclerosis and are associated with an elevated risk of cardiovascular events. There is great interest to further understand the pathophysiologic mechanisms underlying endothelial dysfunction and atherosclerosis progression, and to identify novel biomarkers and therapeutic strategies to prevent endothelial dysfunction, atherosclerosis and to reduce the risk of developing CAD and its complications. The use of liquid biopsies and new molecular biology techniques have allowed the identification of a growing list of molecular and cellular markers of endothelial dysfunction, which have provided insight on the molecular basis of atherosclerosis and are potential biomarkers and therapeutic targets for the prevention and or treatment of atherosclerosis and CAD. This review describes recent information on normal vascular endothelium function, as well as traditional and novel potential biomarkers of endothelial dysfunction and inflammation, and pharmacological and non-pharmacological therapeutic strategies aimed to protect the endothelium or reverse endothelial damage, as a preventive treatment for CAD and related complications.
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Affiliation(s)
- Diana Jhoseline Medina-Leyte
- Genomics of Cardiovascular Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico; (D.J.M.-L.); (O.Z.-G.); (M.D.-P.); (A.G.-G.); (T.V.-M.)
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México (UNAM), Coyoacán, Mexico City 04510, Mexico
| | - Oscar Zepeda-García
- Genomics of Cardiovascular Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico; (D.J.M.-L.); (O.Z.-G.); (M.D.-P.); (A.G.-G.); (T.V.-M.)
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México (UNAM), Coyoacán, Mexico City 04510, Mexico
| | - Mayra Domínguez-Pérez
- Genomics of Cardiovascular Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico; (D.J.M.-L.); (O.Z.-G.); (M.D.-P.); (A.G.-G.); (T.V.-M.)
| | - Antonia González-Garrido
- Genomics of Cardiovascular Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico; (D.J.M.-L.); (O.Z.-G.); (M.D.-P.); (A.G.-G.); (T.V.-M.)
| | - Teresa Villarreal-Molina
- Genomics of Cardiovascular Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico; (D.J.M.-L.); (O.Z.-G.); (M.D.-P.); (A.G.-G.); (T.V.-M.)
| | - Leonor Jacobo-Albavera
- Genomics of Cardiovascular Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico; (D.J.M.-L.); (O.Z.-G.); (M.D.-P.); (A.G.-G.); (T.V.-M.)
- Correspondence: ; Tel.: +55-5350-1900
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Zhang YH, Pan X, Zeng T, Chen L, Huang T, Cai YD. Identifying the RNA signatures of coronary artery disease from combined lncRNA and mRNA expression profiles. Genomics 2020; 112:4945-4958. [PMID: 32919019 DOI: 10.1016/j.ygeno.2020.09.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 07/28/2020] [Accepted: 09/05/2020] [Indexed: 12/23/2022]
Abstract
Coronary artery disease (CAD) is the most common cardiovascular disease. CAD research has greatly progressed during the past decade. mRNA is a traditional and popular pipeline to investigate various disease, including CAD. Compared with mRNA, lncRNA has better stability and thus may serve as a better disease indicator in blood. Investigating potential CAD-related lncRNAs and mRNAs will greatly contribute to the diagnosis and treatment of CAD. In this study, a computational analysis was conducted on patients with CAD by using a comprehensive transcription dataset with combined mRNA and lncRNA expression data. Several machine learning algorithms, including feature selection methods and classification algorithms, were applied to screen for the most CAD-related RNA molecules. Decision rules were also reported to provide a quantitative description about the effect of these RNA molecules on CAD progression. These new findings (CAD-related RNA molecules and rules) can help understand mRNA and lncRNA expression levels in CAD.
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Affiliation(s)
- Yu-Hang Zhang
- School of Life Sciences, Shanghai University, Shanghai 200444, China; Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China; Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
| | - Xiaoyong Pan
- Institute of Image Processing and Pattern Recognition, Shanghai Jiao Tong University, Key Laboratory of System Control and Information Processing, Ministry of Education of China, 200240 Shanghai, China.
| | - Tao Zeng
- Shanghai Research Center for Brain Science and Brain-Inspired Intelligence, Shanghai 201210, China.
| | - Lei Chen
- College of Information Engineering, Shanghai Maritime University, Shanghai 201306, China.
| | - Tao Huang
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.
| | - Yu-Dong Cai
- School of Life Sciences, Shanghai University, Shanghai 200444, China.
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Bessa J, Albino-Teixeira A, Reina-Couto M, Sousa T. Endocan: A novel biomarker for risk stratification, prognosis and therapeutic monitoring in human cardiovascular and renal diseases. Clin Chim Acta 2020; 509:310-335. [PMID: 32710940 DOI: 10.1016/j.cca.2020.07.041] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 12/12/2022]
Abstract
The vascular endothelium is localized at the interface between the blood and surrounding tissues, playing a pivotal role in the maintenance of tissue-fluid homeostasis and in the regulation of host defense, inflammation, vascular tone and remodeling, angiogenesis and haemostasis. The dysfunctional endothelium was shown to be implicated in the pathophysiology of several endothelial-dependent disorders, such as arterial hypertension, coronary artery disease, heart failure and chronic kidney disease, in which it is an early predictor of cardiovascular events. Endocan is a soluble dermatan sulphate proteoglycan mainly secreted by the activated endothelium. It is upregulated by several proinflammatory cytokines and proangiogenic factors and may itself contribute to the inflammatory status. In addition of being a surrogate marker of inflammation and endothelial dysfunction, it seems to be involved in the regulation of several proliferative and neovascularization processes. Therefore, its utility as a biomarker in a wide spectrum of diseases has been increasingly explored. Here, we review the current evidence concerning the role of endocan in several human cardiovascular and renal diseases, where it seems to be a promising biomarker for risk stratification, prognosis and therapeutic monitoring.
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Affiliation(s)
- João Bessa
- Departamento de Biomedicina - Unidade de Farmacologia e Terapêutica, Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
| | - António Albino-Teixeira
- Departamento de Biomedicina - Unidade de Farmacologia e Terapêutica, Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal; Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), Univ. Porto, Porto, Portugal
| | - Marta Reina-Couto
- Departamento de Biomedicina - Unidade de Farmacologia e Terapêutica, Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal; Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), Univ. Porto, Porto, Portugal; Departamento de Medicina Intensiva, Centro Hospitalar São João (CHSJ), Porto, Portugal
| | - Teresa Sousa
- Departamento de Biomedicina - Unidade de Farmacologia e Terapêutica, Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal; Centro de Investigação Farmacológica e Inovação Medicamentosa (MedInUP), Univ. Porto, Porto, Portugal.
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Fender AC, Dobrev D. Pleiotropic actions of ticagrelor versus clopidogrel - Do molecular differences translate into superior clinical efficacy after myocardial infarction? Int J Cardiol Heart Vasc 2020; 27:100508. [PMID: 32310244 PMCID: PMC7154292 DOI: 10.1016/j.ijcha.2020.100508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 03/23/2020] [Indexed: 11/24/2022]
Affiliation(s)
- Anke C. Fender
- Corresponding author at: Institute of Pharmacology, Medical Faculty, University Duisburg-Essen, Hufelandstr. 55, 45122 Essen, Germany.
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