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Alexandru N, Constantin A, Nemecz M, Comariţa IK, Vîlcu A, Procopciuc A, Tanko G, Georgescu A. Hypertension Associated With Hyperlipidemia Induced Different MicroRNA Expression Profiles in Plasma, Platelets, and Platelet-Derived Microvesicles; Effects of Endothelial Progenitor Cell Therapy. Front Med (Lausanne) 2019; 6:280. [PMID: 31850358 PMCID: PMC6901790 DOI: 10.3389/fmed.2019.00280] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 11/15/2019] [Indexed: 01/08/2023] Open
Abstract
Aim: The aim of this study was to analyze the expressed profiles of miRNAs in plasma, platelets, and platelet-derived microvesicles (PMVs) obtained from experimental induced atherosclerosis animal model and to investigate the effect of EPC transplantation on these profiles. Methods: Seventeen selected circulating miRNAs (miR-19a,-21,-126,-146a,-223,-26b,-92a,-222,-210,-221,-143,-10a,-145,-155,-34a,-204, and miR-214) were individually analyzed in plasma, platelets, and PMVs isolated from peripheral blood of hypertensive-hyperlipidemic hamsters treated or not with endothelial progenitor cells (EPCs), and of healthy hamsters taken as control group. Results: Comparative with control group, in hypertension associated with hyperlipidemia the investigated miRNA expression profiles were different: (i) in plasma, the levels of all investigated miRNAs were significantly increased, the highest enhances being noticed for miR-21,-146a,-221,-143,-34a, and miR-204; (ii) in platelets, the expressions of almost all miRNAs were significantly elevated, remarkable for miR-126,-146a,-223,-222, and miR-214, while levels of miR-143, miR-10a, and miR-145 were significantly reduced; (iii) in PMVs, numerous miRNAs were found to have significantly increased levels, especially miR-222,-221,-210, and miR-34a, whereas expressions of various miRNAs as miR-223,-214,-146a,-143,-10a, and miR-145 were significantly decreased. The treatment with EPCs had the following reverse effects: (i) in plasma, significantly reduced the expression of miR-26b,-143,-34a,-204, and miR-214; (ii) in platelets, significantly decreased the levels of almost investigated miRNAs, with remarkably diminishing for miR-126 and miR-221; and (iii) in PMVs, significantly lowered the expression of some miRNAs, with considerably reductions for miR-222,-221,-210, and miR-19a, while the level of miR-214 was found elevated. Conclusions: The present study revealed that miRNAs have differential expression profiles in plasma, platelets, and PMVs under hypertension associated with hyperlipidemia conditions. The different miRNA profile in PMVs compared with platelets indicated an active mechanism of selective packing of miRNAs into PMVs from maternal cells; various miRNAs such as miR-19a,-21,-126,-26b,-92a,-155,-204,-210,-221,-222, and-34a delivered by PMVs may contribute to enrichment of circulating plasma miRNA expression. In addition, our study showed that the EPC-based therapy can regulate the expressions of investigated miRNAs into the three sources. These results provide novel information that could help in finding potential targets for the development of new therapeutic strategies in the cardiovascular disease.
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Affiliation(s)
- Nicoleta Alexandru
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Alina Constantin
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Miruna Nemecz
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Ioana Karla Comariţa
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Alexandra Vîlcu
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Anastasia Procopciuc
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Gabriela Tanko
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Adriana Georgescu
- Pathophysiology and Pharmacology, Institute of Cellular Biology and Pathology, 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
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Zubcevic J, Richards EM, Yang T, Kim S, Sumners C, Pepine CJ, Raizada MK. Impaired Autonomic Nervous System-Microbiome Circuit in Hypertension. Circ Res 2019; 125:104-116. [PMID: 31219753 PMCID: PMC6588177 DOI: 10.1161/circresaha.119.313965] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Hypertension affects an estimated 103 million Americans, yet gaps in knowledge continue to limit its successful management. Rapidly emerging evidence is linking gut dysbiosis to many disorders and diseases including hypertension. The evolution of the -omics techniques has allowed determination of the abundance and potential function of gut bacterial species by next-generation bacterial sequencing, whereas metabolomics techniques report shifts in bacterial metabolites in the systemic circulation of hypertensive patients and rodent models of hypertension. The gut microbiome and host have evolved to exist in balance and cooperation, and there is extensive crosstalk between the 2 to maintain this balance, including during regulation of blood pressure. However, an understanding of the mechanisms of dysfunctional host-microbiome interactions in hypertension is still lacking. Here, we synthesize some of our recent data with published reports and present concepts and a rationale for our emerging hypothesis of a dysfunctional gut-brain axis in hypertension. Hopefully, this new information will improve the understanding of hypertension and help to address some of these knowledge gaps.
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Affiliation(s)
- Jasenka Zubcevic
- Department of Physiological Sciences, College of Veterinary Medicine; University of Florida, Gainesville FL32610
| | - Elaine M. Richards
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Tao Yang
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Seungbum Kim
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Colin Sumners
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Carl J Pepine
- Division of Cardiovascular Medicine, Department of Medicine, College of Medicine, University of Florida, Gainesville FL32610
| | - Mohan K Raizada
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
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3
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Alexandru N, Safciuc F, Constantin A, Nemecz M, Tanko G, Filippi A, Dragan E, Bãdilã E, Georgescu A. Platelets of Healthy Origins Promote Functional Improvement of Atherosclerotic Endothelial Progenitor Cells. Front Pharmacol 2019; 10:424. [PMID: 31068820 PMCID: PMC6491786 DOI: 10.3389/fphar.2019.00424] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/03/2019] [Indexed: 11/13/2022] Open
Abstract
The purpose was to evaluate the effect of platelets on functional properties of late endothelial progenitor cells (EPCs), in the direct co-culture conditions, and to investigate the involved mediators, in experimental induced atherosclerosis. The late EPCs obtained from two animal groups, hypertensive-hyperlipidemic (HH) and control (C) hamsters, named late EPCs-HH and late EPCs-C, were co-incubated with or without platelets isolated from both groups. Our results have showed that exposure to platelets from control animals: (i) promoted the late EPCs-C capacity to form colonies and capillary-like structures, and also to proliferate and migrate; (ii) improved the functional properties of late EPCs-HH; (iii) strengthened the direct binding EPCs-platelets; (iv) increased SDF-1α,VEGF, PDGF, and reduced CD40L, IL-1β,-6,-8 levels; and (v) enhanced miR-223 and IGF-1R expressions. Platelets from HH group diminished functional abilities for both EPC types and had opposite effects on these pro-angiogenic and pro-inflammatory molecules. Furthermore, testing the direct effect of miR-223 and IGF-1R on late EPCs disclosed that these molecular factors improve late EPC functional properties in atherosclerosis in terms of stimulation of the proliferation and migration abilities. In conclusion, in vitro exposure to platelets of healthy origins had a positive effect on functional properties of atherosclerotic late EPCs. The most likely candidates mediating EPC-platelet interaction can be SDF-1α, VEGF, CD40L, PDGF, IL-1β,-6,-8, miR-223, and IGF-1R. The current study brings evidences that the presence of healthy origin platelets is of utmost importance on functional improvement of EPCs in atherosclerosis.
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Affiliation(s)
- Nicoleta Alexandru
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Florentina Safciuc
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Alina Constantin
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Miruna Nemecz
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Gabriela Tanko
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Alexandru Filippi
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Emanuel Dragan
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Elisabeta Bãdilã
- Internal Medicine Clinic, Emergency Clinical Hospital, Bucharest, Romania.,'Carol Davila' University of Medicine and Pharmacy, Bucharest, Romania
| | - Adriana Georgescu
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
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Chen HY, Chou P. Associations Between PFA-Measured Aspirin Resistance, Platelet Count, Renal Function, and Angiotensin Receptor Blockers. Clin Appl Thromb Hemost 2018; 24:63S-68S. [PMID: 29996660 PMCID: PMC6714849 DOI: 10.1177/1076029618786588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Aspirin resistance is used to describe patients who are undergoing aspirin therapy but fail for the inhibition of thromboxane biosynthesis in platelets. Although the true mechanism is unclear, drug–drug interaction remains a possible factor. The study aimed to determine whether there was association between aspirin resistance and the concomitant cardiovascular medication. Using the Platelet Function Analyzer-100 system, aspirin resistance was evaluated in aspirin-treated patients from the outpatient department. The associations between aspirin resistance and their concomitant common cardiovascular medication were analyzed. Aspirin resistance was prevalent in 147 (17.7%) of 831 patients. Concomitant angiotensin receptor blocker (ARB) treatment and low platelet count were associated with aspirin response (P = .04, .02, respectively). Multivariate logistic regression analysis results showed an association between aspirin response and ARB therapy (adjusted odds ratio [OR] 1.48; 95% confidence interval, CI: 1.08-2.18). And the association was blunted when platelet count was considered (adjusted OR 1.43, 95% CI: 0.92-2.23). In ARB-treated patients, increased creatinine and decreased hematocrit laboratory data increased the risk of aspirin resistance (P = .02, .04, respectively), and the effect of platelet count on aspirin resistance was diminished by ARB therapy. Concomitant ARB treatment in aspirin-treated patients decreased the risk of aspirin resistance, and the effect was dependent on low platelet count. In ARB-treated patients, increased creatinine and decreased hematocrit data increased the risk of aspirin resistance. In addition, the effect of platelet count on aspirin resistance was diminished by ARB treatment.
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Affiliation(s)
- Hung Yi Chen
- Division of Cardiology, Department of Medicine, Taipei City Hospital, Heping Fuyou Branch, Taipei, Taiwan.,Institute of Public Health and Community Medicine Research Center, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Pesus Chou
- Institute of Public Health and Community Medicine Research Center, National Yang-Ming University School of Medicine, Taipei, Taiwan
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5
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Popa MA, Mihai MC, Constantin A, Şuică V, Ţucureanu C, Costache R, Antohe F, Dubey RK, Simionescu M. Dihydrotestosterone induces pro-angiogenic factors and assists homing of MSC into the cardiac tissue. J Mol Endocrinol 2018; 60:1-15. [PMID: 29247133 DOI: 10.1530/jme-17-0185] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 10/12/2017] [Indexed: 01/01/2023]
Abstract
The use of mesenchymal stem cells (MSC) as a therapeutic tool in cardiovascular diseases is promising. Since androgens exert some beneficial actions on the cardiovascular system, we tested our hypothesis that this hormone could promote MSC-mediated repair processes, also. Cultured MSCs isolated from Wharton's jelly were exposed to 30 nM dihydrotestosterone (DHT) for 1 or 4 days and the effects of the hormone on their growth/migration/adhesion and the underlying mechanisms were assessed. Results were obtained by real-time cell impedance measurements, and DNA quantification showed that DHT increased MSC proliferation by ~30%. As determined by xCELLigence system, DHT augmented (~2 folds) the migration of MSC toward cardiac tissue slices (at 12 h), and this effect was blocked by flutamide, an androgen receptor (AR) antagonist. Exposure of cells to DHT, upregulated the gene and protein expression of AR, EMMPRIN and MMP-9 and downregulated the expression of MMP-2 DHT significantly induced the release of nitric oxide by MSC (≥2-fold) and flutamide blocked this effect. When MSCs were co-cultured with cardiac slices, immunohistochemical analysis and qRT-PCR showed that the integration of DHT-stimulated MSC was significantly higher than that of in controls. In conclusion, our findings provide the first evidence that DHT promotes MSC growth, migration and integration into the cardiac slices. The modulating effects of DHT were associated with upregulation of ARs and of key molecules known to promote tissue remodeling and angiogenesis. Our findings suggest that priming of MSC with DHT may potentially increase their capability to regenerate cardiac tissue; in vivo studies are needed to confirm our in vitro findings.
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Affiliation(s)
- Mirel-Adrian Popa
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Maria-Cristina Mihai
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Alina Constantin
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Viorel Şuică
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Cătălin Ţucureanu
- Infection and Immunity Laboratory, National Institute for Research and Development in Microbiology and Immunology 'I. Cantacuzino', Bucharest, Romania
| | - Raluca Costache
- Department of Obstetrics and Gynecology, Clinical Hospital 'Dr. Ioan Cantacuzino', Bucharest, Romania
| | - Felicia Antohe
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
| | - Raghvendra K Dubey
- Department for Reproductive Endocrinology, University Hospital Zurich, Schlieren, Switzerland
- Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Maya Simionescu
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of the Romanian Academy, Bucharest, Romania
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Alexandru N, Andrei E, Niculescu L, Dragan E, Ristoiu V, Georgescu A. Microparticles of healthy origins improve endothelial progenitor cell dysfunction via microRNA transfer in an atherosclerotic hamster model. Acta Physiol (Oxf) 2017; 221:230-249. [PMID: 28513999 DOI: 10.1111/apha.12896] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 02/14/2017] [Accepted: 05/12/2017] [Indexed: 12/13/2022]
Abstract
AIM In this study, we aimed: (i) to obtain and functionally characterize the cultures of late endothelial progenitor cells (EPCs) from the animal blood; (ii) to investigate the potential beneficial effects of circulating microparticles (MPs) of healthy origins on EPC dysfunctionality in atherosclerosis as well as involved mechanisms. METHODS Late EPCs were obtained and expanded in culture from peripheral blood isolated from two animal groups: hypertensive-hyperlipidaemic (HH) and control (C) hamsters. In parallel experiments, late EPC cultures from HH were incubated with MPs from C group. RESULTS The results showed that late EPCs display endothelial cell phenotype: (i) have ability to uptake 1,1-dioctadecyl-3,3,3,3 tetramethylindocarbocyanine-labelled acetylated low-density lipoprotein and Ulex europaeus agglutinin lectin-1; (ii) express CD34, CD133, KDR, CD144, vWF, Tie-2. Late EPCs from HH exhibited different morphological and functional characteristics compared to control: (i) are smaller and irregular in shape; (ii) present decreased endothelial surface marker expression; (iii) display reduced proliferation, migration and adhesion; (iv) lose ability to organize themselves into tubular structures and integrate into vascular network; (v) have diminished function of inward rectifier potassium channels. The incubation of late EPCs with MPs improved EPC functionality by miR-10a, miR-21, miR-126, miR-146a, miR-223 transfer and IGF-1 expression activation; the kinetic study of MP incorporation into EPCs demonstrated MP uptake by EPCs followed by the miRNA transfer. CONCLUSION The data reveal that late EPCs from atherosclerotic model exhibit distinctive features and are dysfunctional, and their function recovery can be supported by MP ability to transfer miRNAs. These findings bring a new light on the vascular repair in atherosclerosis.
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Affiliation(s)
- N. Alexandru
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
| | - E. Andrei
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
| | - L. Niculescu
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
| | - E. Dragan
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
| | - V. Ristoiu
- Faculty of Biology; University of Bucharest; Bucharest Romania
| | - A. Georgescu
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
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7
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Marketou ME, Kontaraki JE, Papadakis JA, Vrentzos GE, Patrianakos A, Fragkiadakis K, Tsiverdis P, Lempidakis D, Chlouverakis G, Vardas PE, Parthenakis FI. Increased platelet alpha 2B-adrenergic receptor gene expression in well-controlled hypertensives: the effect of arterial stiffness. ACTA ACUST UNITED AC 2017; 11:762-768. [PMID: 28923554 DOI: 10.1016/j.jash.2017.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 08/07/2017] [Accepted: 08/18/2017] [Indexed: 11/16/2022]
Abstract
Catecholamines play a major role in atherothrombotic mechanisms in essential hypertension. Alpha2B-adrenergic receptors (α2B-ARs) are implicated in the pathophysiology of platelet aggregation. In this study, we evaluated platelet α2B-AR gene expression levels in patients with well-controlled essential hypertension compared with normal individuals and investigated their association with increased arterial stiffness. Fifty-nine patients with well-controlled essential hypertension (34 men, mean age 65 ± 9 years) and 26 normotensives (19 men, mean age 64 ± 8 years) were included in the study. For each patient, carotid-femoral pulse wave velocity (PWV) and carotid-radial PWV were evaluated. In addition, blood samples were obtained and platelets were isolated. The α2B-AR gene expression levels in platelets were examined by real-time polymerase chain reaction for each participant. Well-controlled hypertensive patients showed significantly higher gene expression levels of α2B-Rs in platelets compared with normotensives (34.7 ± 29.5 vs 17.6 ± 12.5, respectively, P = .005). Interestingly, we found that carotid-femoral PWV and carotid-radial PWV were positively correlated with platelet α2B-R gene expression levels (r = 0.59, P < .001, and r = 0.39, P = .002, respectively).Platelet α2B-R gene expression levels are increased in patients with well-controlled essential hypertension compared with normotensives and are correlated with increased PWV in those patients. Our data indicate an association of arterial stiffness and platelet α2B-Rs gene expression and indicate the need for further research.
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Affiliation(s)
- Maria E Marketou
- Department of Cardiology, Heraklion University Hospital, Heraklion, Crete, Greece.
| | - Joanna E Kontaraki
- Division of Biostatistics, Department of Social Medicine, Molecular Cardiology Laboratory, School of Medicine, University of Crete, Heraklion, Crete, Greece
| | - John A Papadakis
- Department of Internal Medicine, Heraklion University Hospital, Crete, Heraklion, Crete, Greece
| | - George E Vrentzos
- Department of Internal Medicine, Heraklion University Hospital, Crete, Heraklion, Crete, Greece
| | | | | | - Panagiotis Tsiverdis
- Department of Cardiology, Heraklion University Hospital, Heraklion, Crete, Greece
| | - Dimitris Lempidakis
- Department of Cardiology, Heraklion University Hospital, Heraklion, Crete, Greece
| | - Gregory Chlouverakis
- Division of Biostatistics, School of Medicine, University of Crete, Heraklion, Crete, Greece
| | - Panos E Vardas
- Department of Cardiology, Heraklion University Hospital, Heraklion, Crete, Greece
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8
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Prediction and Subtyping of Hypertension from Pan-Tissue Transcriptomic and Genetic Analyses. Genetics 2017; 207:1121-1134. [PMID: 28899996 DOI: 10.1534/genetics.117.300280] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 08/23/2017] [Indexed: 01/01/2023] Open
Abstract
Hypertension (HT) is a complex systemic disease involving transcriptional changes in multiple organs. Here we systematically investigate the pan-tissue transcriptional and genetic landscape of HT spanning dozens of tissues in hundreds of individuals. We find that in several tissues, previously identified HT-linked genes are dysregulated and the gene expression profile is predictive of HT. Importantly, many expression quantitative trait loci (eQTL) SNPs associated with the population variance of the dysregulated genes are linked with blood pressure in an independent genome-wide association study, suggesting that the functional effect of HT-associated SNPs may be mediated through tissue-specific transcriptional dysregulation. Analyses of pan-tissue transcriptional dysregulation profile, as well as eQTL SNPs underlying the dysregulated genes, reveals substantial heterogeneity among the HT patients, revealing two broad groupings - a Diffused group where several tissues exhibit HT-associated molecular alterations and a Localized group where such alterations are localized to very few tissues. These two patient subgroups differ in several clinical phenotypes including respiratory, cerebrovascular, diabetes, and heart disease. These findings suggest that the Diffused and Localized subgroups may be driven by different molecular mechanisms and have different genetic underpinning.
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9
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Sepúlveda C, Palomo I, Fuentes E. Antiplatelet activity of drugs used in hypertension, dyslipidemia and diabetes: Additional benefit in cardiovascular diseases prevention. Vascul Pharmacol 2017; 91:10-17. [DOI: 10.1016/j.vph.2017.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 02/03/2017] [Accepted: 03/21/2017] [Indexed: 02/02/2023]
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10
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Lee JB, Kim GS, Cho HN. Statin and Ezetimibe Combination Therapy Decreases Mean Platelet Volume Compared to Statin Monotherapy. J Stroke 2017; 19:109-110. [PMID: 28178405 PMCID: PMC5307935 DOI: 10.5853/jos.2016.00409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 07/21/2016] [Accepted: 08/30/2016] [Indexed: 02/02/2023] Open
Affiliation(s)
- Jun-Beom Lee
- Department of Neurology, Hong-Ik Hospital, Seoul, Korea
| | - Gyeong-Seon Kim
- Department of Laboratory Medicine, Hong-Ik Hospital, Seoul, Korea
| | - Han-Na Cho
- Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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11
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Georgescu A, Alexandru N, Andrei E, Dragan E, Cochior D, Dias S. Effects of transplanted circulating endothelial progenitor cells and platelet microparticles in atherosclerosis development. Biol Cell 2016; 108:219-43. [PMID: 26968123 DOI: 10.1111/boc.201500104] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 03/02/2016] [Indexed: 12/13/2022]
Abstract
BACKGROUND INFORMATION Atherosclerosis is an inflammatory disease, in which risk factors such as hyperlipidemia and hypertension affect the arterial endothelium, resulting in dysfunction, cell damage or both. The number of circulating endothelial progenitor cells and microparticles provides invaluable outcome prediction for atherosclerosis disease. However, evidence for the therapeutic potential of endothelial progenitor cells and microparticles in atherosclerosis development is limited. Our study was designed to investigate the possible protective role of a cell therapy-based approach, using endothelial progenitor cells and the dual behaviour of circulating platelet microparticles, on atherosclerosis development in hypertensive-hypercholesterolemic hamster model. Consequently, control hamsters received four intravenous inoculations of: (1) 1×10(5) endothelial progenitor cells of healthy origins in one dose per month, during four months of diet-induced atherosclerosis, and after hypertensive-hypercholesterolemic diet for further four months; (2) in a second set of experiments, 1×10(5) endothelial progenitor cells of healthy origins or/and 1×10(5) platelet microparticles of atherosclerotic origins were inoculated every other month during hypertensive-hypercholesterolemic diet. RESULTS Endothelial progenitor cell treatment had the following effects: (1) re-established plasmatic parameters: cholesterol and triglyceride concentrations, blood pressure, heart rate, cytokine and chemokine profiles, platelet microparticle pro-thrombotic activity and endothelial progenitor cell paracrine activity reflected by cytokine/chemokine detection; (2) reduced lipid, macrophage and microparticle accumulation in liver; (3) reduced atherosclerosis development, revealed by decreased lipid, macrophage and microparticle content of arterial wall; (4) induced the recruitment and incorporation of endothelial progenitor cells into liver and arterial wall; (5) improved arterial dysfunction by increasing contraction and relaxation; (6) reduced the protein expression of specific pro-inflammatory molecules in liver and arterial wall. Platelet microparticle transplantation aggravated the above-mentioned biomarkers and atherosclerosis process, which were partially reverted with co-inoculation of platelet microparticles and endothelial progenitor cells. CONCLUSIONS With this study, we demonstrate in a hypertensive-hypercholesterolemic hamster model, that the endothelial progenitor cell-based therapy suppresses the development of atherosclerosis and reduces hepatic lipid and macrophage accumulation with the consequent alleviation of dyslipidaemia and hypertension. SIGNIFICANCE Our results support the notion that increasing the number of circulating endothelial progenitor cells by different ways could be a promising therapeutic tool for atherosclerosis.
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Affiliation(s)
- Adriana Georgescu
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of Romanian Academy, Bucharest, Romania.,Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
| | - Nicoleta Alexandru
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of Romanian Academy, Bucharest, Romania.,Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
| | - Eugen Andrei
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of Romanian Academy, Bucharest, Romania
| | - Emanuel Dragan
- Institute of Cellular Biology and Pathology 'Nicolae Simionescu' of Romanian Academy, Bucharest, Romania
| | - Daniel Cochior
- Faculty of Medicine, 'Titu Maiorescu' University, Bucharest, Romania.,General Surgery Clinic, CF 2 Clinical Hospital, Bucharest, Romania
| | - Sérgio Dias
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
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da Motta NAV, de Brito FCF. Cilostazol exerts antiplatelet and anti-inflammatory effects through AMPK activation and NF-kB inhibition on hypercholesterolemic rats. Fundam Clin Pharmacol 2016; 30:327-37. [PMID: 26950185 DOI: 10.1111/fcp.12195] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 03/01/2016] [Accepted: 03/04/2016] [Indexed: 12/16/2022]
Abstract
This work presents a model of rats fed a high-cholesterol diet, receiving a long-term oral administration of cilostazol, a PDE3-inhibitor. The aim of this study was to evaluate the molecular mechanisms by which cilostazol interferes with platelets signaling pathways to avoid atherosclerosis early development. Male Wistar rats were divided into 3 groups: Control group received standard rat chow (C), hypercholesterolemic group (HCD), and HCD+CIL (cilostazol group) received hypercholesterolemic diet for 45 days. HCD+CIL group received cilostazol (30 mg/kg/p.o.) once daily in the last 15 days. Platelet aggregation, lipid profile, lipid peroxidation, and cytokine serum levels were assessed. Expression of P-selectin, CD40L, PKC-α, IkB-α, and iNOS and activation of AMPK, NF-κB, and eNOS in the platelets were assessed using Western blot analysis. Cilostazol reduced the levels of total cholesterol (361.0 ± 12.8 vs. 111.5 ± 1.6 mg/dL), triglycerides (186.9 ± 17.7 vs. 55.4 ±3.1 mg/dL), cLDL (330.9 ± 9.7 vs. 61.5 ± 3.5 mg/dL), cVLDL (45.0 ± 4.6 vs. 11.1 ± 0.6 mg/dL), and malondialdehyde (9.4 ± 0.5 vs. 3.2 ± 0.3 nmol/mL) compared to the HCD group. Cilostazol presented antiplatelet properties and decreased inflammatory markers levels. These effects seem to be related to AMPK activation, NF-kB inhibition, and eNOS activation.
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Affiliation(s)
- Nadia Alice Vieira da Motta
- Departamento de Fisiologia e Farmacologia, Laboratório de Farmacologia Experimental (LAFE), Instituto Biomédico, Universidade Federal Fluminense (UFF), Sala 204-A, 24230-210, Niterói, Rio de Janeiro, Brazil
| | - Fernanda Carla Ferreira de Brito
- Departamento de Fisiologia e Farmacologia, Laboratório de Farmacologia Experimental (LAFE), Instituto Biomédico, Universidade Federal Fluminense (UFF), Sala 204-A, 24230-210, Niterói, Rio de Janeiro, Brazil
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13
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Gambaryan S, Tsikas D. A review and discussion of platelet nitric oxide and nitric oxide synthase: do blood platelets produce nitric oxide from L-arginine or nitrite? Amino Acids 2015; 47:1779-93. [PMID: 25929585 DOI: 10.1007/s00726-015-1986-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 04/09/2015] [Indexed: 02/07/2023]
Abstract
The NO/sGC/cGMP/PKG system is one of the most powerful mechanisms responsible for platelet inhibition. In numerous publications, expression of functional NO synthase (NOS) in human and mouse platelets has been reported. Constitutive and inducible NOS isoforms convert L-arginine to NO and L-citrulline. The importance of this pathway in platelets and in endothelial cells for the regulation of platelet function is discussed since decades. However, there are serious doubts in the literature concerning both expression and functionality of NOS in platelets. In this review, we aim to present and critically evaluate recent data concerning NOS expression and function in platelets, and to especially emphasise potential pitfalls of detection of NOS proteins and measurement of NOS activity. Prevailing analytical problems are probably the main sources of contradictory data on occurrence, activity and function of NOS in platelets. In this review we also address issues of how these problems can be resolved. NO donors including organic nitrites (RONO) and organic nitrate (RONO2) are inhibitors of platelet activation. Endogenous inorganic nitrite (NO2 (-)), the product of NO autoxidation, and exogenous inorganic nitrite are increasingly investigated as NO donors in the circulation. The role of platelets in the generation of NO from nitrite is also discussed.
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Affiliation(s)
- Stepan Gambaryan
- Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, 44 Thorez Prosp, St. Petersburg, 194223, Russia,
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14
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Alexandru N, Andrei E, Dragan E, Georgescu A. Interaction of platelets with endothelial progenitor cells in the experimental atherosclerosis: Role of transplanted endothelial progenitor cells and platelet microparticles. Biol Cell 2015; 107:189-204. [DOI: 10.1111/boc.201400071] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 03/06/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Nicoleta Alexandru
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
| | - Eugen Andrei
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
| | - Emanuel Dragan
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
| | - Adriana Georgescu
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy; Bucharest Romania
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15
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Gonçalves LH, Silva MVF, Duarte RCF, Dusse LMS, Fernandes AP, Bosco AA, Gomes KB, Carvalho MDG. Acetylsalicylic acid therapy: Influence of metformin use and other variables on urinary 11-dehydrothromboxane B2 levels. Clin Chim Acta 2014; 429:76-8. [DOI: 10.1016/j.cca.2013.11.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 11/22/2013] [Accepted: 11/25/2013] [Indexed: 01/18/2023]
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Gonzalez J, Donoso W, Díaz N, Albornoz ME, Huilcaman R, Morales E, Moore-Carrasco R. High fat diet induces adhesion of platelets to endothelium in two models of dyslipidemia. J Obes 2014; 2014:591270. [PMID: 25328689 PMCID: PMC4195255 DOI: 10.1155/2014/591270] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 08/28/2014] [Accepted: 08/28/2014] [Indexed: 01/06/2023] Open
Abstract
Cardiovascular diseases (CVD) represent about 30% of all global deaths. It is currently accepted that, in the atherogenic process, platelets play an important role, contributing to endothelial activation and modulation of the inflammatory phenomenon, promoting the beginning and formation of lesions and their subsequent thrombotic complications. The objective of the present work was to study using immunohistochemistry, the presence of platelets, monocytes/macrophages, and cell adhesion molecules (CD61, CD163, and CD54), in two stages of the atheromatous process. CF-1 mice fed a fat diet were used to obtain early stages of atheromatous process, denominated early stage of atherosclerosis, and ApoE(-/-) mice fed a fat diet were used to observe advanced stages of atherosclerosis. The CF-1 mice model presented immunostaining on endothelial surface for all three markers studied; the advanced atherosclerosis model in ApoE(-/-) mice also presented granular immunostaining on lesion thickness, for the same markers. These results suggest that platelets participate in atheromatous process from early stages to advance d stages. High fat diet induces adhesion of platelets to endothelial cells in vivo. These findings support studying the participation of platelets in the formation of atheromatous plate.
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Affiliation(s)
- Jaime Gonzalez
- Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, P.O. Box 747, Talca, Chile
| | - Wendy Donoso
- Departamento de Estomatología, Facultad de Ciencias de la Salud, Universidad de Talca, Avenida Lircay s/n, Talca, Chile
| | - Natalia Díaz
- Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, P.O. Box 747, Talca, Chile
| | - María Eliana Albornoz
- Departamento de Ciencias Básicas Biomédicas, Facultad de Ciencias de la Salud, Universidad de Talca, Avenida Lircay s/n, Talca, Chile
| | - Ricardo Huilcaman
- Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, P.O. Box 747, Talca, Chile
| | - Erik Morales
- Facultad de Medicina, Universidad Católica del Maule, Avenida San Miguel 3605, 3480112 Talca, Chile
| | - Rodrigo Moore-Carrasco
- Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, P.O. Box 747, Talca, Chile
- Centro de Estudios en Alimentos Procesados (CEAP), Conicyt-Regional, Gore Maule, R09I2001, Avenida San Miguel 3425, 3480137 Talca, Chile
- Programa Investigación de Excelencia Interdisciplinario en Envejecimiento Saludable PIEI-ES, Universidad de Talca, Avenida Lircay s/n, Talca, Chile
- *Rodrigo Moore-Carrasco:
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Lin HL, Yen HW, Hsieh SL, An LM, Shen KP. Low-dose aspirin ameliorated hyperlipidemia, adhesion molecule, and chemokine production induced by high-fat diet in Sprague-Dawley rats. Drug Dev Res 2013; 75:97-106. [PMID: 24648214 DOI: 10.1002/ddr.21159] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 11/06/2013] [Indexed: 11/07/2022]
Abstract
In this study the effects of low-dose aspirin (5 mg/kg) on adhesion molecule and chemokine expression in a hyperlipidemic rat model. Six-week-old Sprague-Dawley (SD) rats were assigned to two control groups receiving either a regular diet or high-fat diet (HFD) and a treatment group fed HFD with 5 mg/kg aspirin for a 10-week period. Compared with the regular diet control group, the HFD control group had higher body weight, lower levels of high-density lipoprotein, higher concentrations of insulin, triglyceride, total cholesterol, and low-density lipoprotein, but no differences in blood glucose and glycated hemoglobin. The prothrombin time (PT) and activated partial thromboplastin time (aPTT) were clearly shortened in the HFD group. That group also had increased expression of intercellular adhesion molecule-1 (ICAM-1), ICAM-2, ICAM-3, vascular cell adhesion molecule (VCAM), platelet endothelial cell adhesion molecule (PECAM) and P-selectin in platelets and vascular adhesion protein-1 in lymphocyte and in aorta increased expressions of ICAM-1, ICAM-2, ICAM-3, VCAM, PECAM, E-selectin, monocyte chemoattractant protein-1 (MCP-1) and CCR2. The HFD rats also had increased PKCα, IκB kinase α (IKKα), p65, mitogen-activated protein kinases (MAPKs) (p38, c-Jun N-terminal kinases 1, extracellular signal-regulated kinase 1/2), and their phosphorylated forms. Low-dose aspirin improved HFD-induced hyperinsulinemia and hyperlipidemia, recovered PT and aPTT, inhibited upregulation of adhesion molecules and chemokines and reduced expression of PKCα, IKKα, p65, and MAPKs. Low-dose aspirin ameliorates HFD-induced hyperlipidemia and hyperinsulinemia, and prevents HFD-induced expression of adhesion molecules and chemokine formation.
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Affiliation(s)
- Hui-Li Lin
- Department of Food Science and Nutrition, Meiho University, Pingtung, Taiwan
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18
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Özkan G, Ulusoy S, Menteşe A, Karahan SC, Cansiz M. New marker of platelet activation, SCUBE1, is elevated in hypertensive patients. Am J Hypertens 2013; 26:748-53. [PMID: 23443724 DOI: 10.1093/ajh/hpt007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Hypertension is associated with an increase in platelet activation and endothelial dysfunction and leads to a tendency to cardiovascular events (CVEs). Signal peptide-CUB-EGF domain-containing protein 1 (SCUBE1) is a novel platelet activation marker. There are currently no studies showing the level of SCUBE1 in hypertensive patients. The purpose of this study was to determine the level of SCUBE1 in this patient group and to investigate the parameters affecting that level. METHODS Forty-five newly diagnosed, untreated, stage 1 hypertensive patients and 21 healthy individuals were included. Blood specimens were collected to determine SCUBE1, soluble CD40 ligand, prothrombin time, partial thromboplastin time, fibrinogen, D dimer, hemogram, lipid parameters, blood urea nitrogen, creatinine, and uric acid levels. The relation between SCUBE1 level and demographic data and biochemical parameters was then investigated. RESULTS SCUBE1 and sCD40L levels obtained from plasma specimens from the hypertensive group were significantly higher than those of the control group (P < 0.001; P < 0.05, respectively). Hypertensive group blood pressure (BP) values and uric acid, low-density lipoprotein, total cholesterol, and triglyceride levels were also statistically higher than those of the control group. Parameters affecting SCUBE1 levels were systolic and diastolic BP, sCD40L, lipid parameters, and uric acid levels. CONCLUSIONS We show elevated levels of SCUBE1, a novel platelet activation marker, in primary hypertensive patients. We think that, when supported by further clinical studies, this newly described marker may be useful in the monitoring of CVEs in this patient group, in which platelet activation is known to be associated with such events.
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Affiliation(s)
- Gülsüm Özkan
- Department of Nephrology, Karadeniz Technical University, School of Medicine, Trabzon, Turkey.
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Georgescu A, Alexandru N, Nemecz M, Titorencu I, Popov D. Irbesartan administration therapeutically influences circulating endothelial progenitor cell and microparticle mobilization by involvement of pro-inflammatory cytokines. Eur J Pharmacol 2013; 711:27-35. [PMID: 23639758 DOI: 10.1016/j.ejphar.2013.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/27/2013] [Accepted: 04/03/2013] [Indexed: 10/26/2022]
Abstract
Circulating microparticles (MPs) and endothelial progenitor cells (EPCs) correlate with endothelial dysfunction and contribute to the pathogenesis of atherosclerosis. In this context, we explored whether the angiotensin II type I receptor antagonist, irbesartan, exerts a pharmacological control in the atherosclerotic process by the improvement of EPC mobilization and inhibitory effects on MP release and VEGF and SDF-1α levels in the hypertensive-hypercholesterolemic (HH) hamster model. The HH hamsters were treated with irbesartan (50mg/kg b.w/day administered by gavage) for 4 month (HHI). We analyzed MP/EPC infiltration in vascular wall before and after irbesartan administration as well as the endothelial function and expression of VEGF/SDF-1α in plasma and tissue and of molecular pathways activated by them. The results showed that treatment with irbesartan significantly increased EPC infiltration and decreased MP infiltration. The mechanisms underlying this response include the reduction/increase of a number of specific membrane receptors exposed by MPs (TF, P-Selectin, E-Selectin, PSGL-1, Rantes), respectively, by EPCs (β2-Integrins, α4β1-integrin), the augmentation of endothelium-mediated vasodilation and the reduction of protein expression of VEGF/SDF-1α followed by: (1) the diminishment of pro-inflammatory endothelial cytokines: VEGFR1, VEGFR2, CXCR4, Tie2, PIGF with role in EPC homing to sites of damaged endothelium; and (2) the increase of protein expression of COX-2, PGI2 synthase molecules with role in the improvement of arterial wall vasodilatation. In conclusion, the study underlines that irbesartan administration therapeutically improves/reduces EPC, respectively, MP mobilization and this action may be of salutary relevance contributing to its beneficial cardiovascular effects.
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Alexandru N, Popov D, Dragan E, Andrei E, Georgescu A. Circulating endothelial progenitor cell and platelet microparticle impact on platelet activation in hypertension associated with hypercholesterolemia. PLoS One 2013; 8:e52058. [PMID: 23372649 PMCID: PMC3556069 DOI: 10.1371/journal.pone.0052058] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 11/12/2012] [Indexed: 12/18/2022] Open
Abstract
Aim The purpose of this project was to evaluate the influence of circulating endothelial progenitor cells (EPCs) and platelet microparticles (PMPs) on blood platelet function in experimental hypertension associated with hypercholesterolemia. Methods Golden Syrian hamsters were divided in six groups: (i) control, C; (ii) hypertensive-hypercholesterolemic, HH; (iii) ‘prevention’, HHin-EPCs, HH animals fed a HH diet and treated with EPCs; (iv) ‘regression’, HHfin-EPCs, HH treated with EPCs after HH feeding; (v) HH treated with PMPs, HH-PMPs, and (vi) HH treated with EPCs and PMPs, HH-EPCs-PMPs. Results Compared to HH group, the platelets from HHin-EPCs and HHfin-EPCs groups showed a reduction of: (i) activation, reflected by decreased integrin 3β, FAK, PI3K, src protein expression; (ii) secreted molecules as: SDF-1, MCP-1, RANTES, VEGF, PF4, PDGF and (iii) expression of pro-inflammatory molecules as: SDF-1, MCP-1, RANTES, IL-6, IL-1β; TFPI secretion was increased. Compared to HH group, platelets of HH-PMPs group showed increased activation, molecules release and proteins expression. Compared to HH-PMPs group the combination EPCs with PMPs treatment induced a decrease of all investigated platelet molecules, however not comparable with that recorded when EPC individual treatment was applied. Conclusion EPCs have the ability to reduce platelet activation and to modulate their pro-inflammatory and anti-thrombogenic properties in hypertension associated with hypercholesterolemia. Although, PMPs have several beneficial effects in combination with EPCs, these did not improve the EPC effects. These findings reveal a new biological role of circulating EPCs in platelet function regulation, and may contribute to understand their cross talk, and the mechanisms of atherosclerosis.
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Affiliation(s)
- Nicoleta Alexandru
- Petru Poni’ Institute of Macromolecular Chemistry, Iasi, Romania
- Institute of Cellular Biology and Pathology, ‘Nicolae Simionescu’ of the Romanian Academy, Bucharest, Romania
- * E-mail: (NA); adriana.georgescu@ icbp.ro (AG)
| | - Doina Popov
- Institute of Cellular Biology and Pathology, ‘Nicolae Simionescu’ of the Romanian Academy, Bucharest, Romania
| | - Emanuel Dragan
- Institute of Cellular Biology and Pathology, ‘Nicolae Simionescu’ of the Romanian Academy, Bucharest, Romania
| | - Eugen Andrei
- Institute of Cellular Biology and Pathology, ‘Nicolae Simionescu’ of the Romanian Academy, Bucharest, Romania
| | - Adriana Georgescu
- Petru Poni’ Institute of Macromolecular Chemistry, Iasi, Romania
- Institute of Cellular Biology and Pathology, ‘Nicolae Simionescu’ of the Romanian Academy, Bucharest, Romania
- * E-mail: (NA); adriana.georgescu@ icbp.ro (AG)
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da Motta NAV, Kümmerle AE, Marostica E, dos Santos CF, Fraga CAM, Barreiro EJ, de Miranda ALP, de Brito FCF. Anti-atherogenic Effects of a New Thienylacylhydrazone Derivative, LASSBio-788, in Rats Fed a Hypercholesterolemic Diet. J Pharmacol Sci 2013; 123:47-57. [DOI: 10.1254/jphs.13016fp] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Amano H, Ito Y, Ogawa F, Eshima K, Suzuki T, Oba K, Matsui Y, Kato S, Fukui T, Nakamura M, Kitasato H, Fukamizu A, Majima M. Angiotensin II type 1A receptor signaling facilitates tumor metastasis formation through P-selectin-mediated interaction of tumor cells with platelets and endothelial cells. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 182:553-64. [PMID: 23219751 DOI: 10.1016/j.ajpath.2012.10.026] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 10/09/2012] [Accepted: 10/31/2012] [Indexed: 11/28/2022]
Abstract
Angiotensin II is involved in tumor growth; however, the precise mechanism is not known. Platelets also contribute to tumor growth, and angiotensin II type 1 receptor (AT1) is expressed on the platelet surface. We hypothesized that interaction of platelets with tumor cells through AT1 receptor signaling promotes tumor metastasis. B16F1 melanoma cells were intravenously injected into Agtr1a knockout mice (AT1a(-/-)) and wild-type littermates (WT); the AT1a(-/-) mice exhibited a reduction in lung colonies. Angiotensin II induced expression of P-selectin on platelets in WT but not in AT1a(-/-) mice. A selective P-selectin neutralizing antibody decreased lung colony numbers in WT but not in AT1a(-/-) mice. Levels of vascular endothelial growth factor (VEGF) and stromal cell-derived factor 1 (SDF-1) receptor in platelets at metastatic locus were lower in AT1a(-/-) mice. Treatment of neutralizing antibodies against VEGF and CXCR4 decreased lung colony numbers in WT but not in AT1a(-/-) mice. In AT1a(-/-) mice, and both mobilization of progenitor cells expressing CXCR4(+)VEGFR1(+) cells from bone marrow and their recruitment to lung tissues were suppressed. These results suggest that AT1A signaling plays a critical role in tumor metastasis through P-selectin-mediated interactions of platelets with tumor and endothelial cells and through the AT1A signaling-dependent production of VEGF and SDF-1, which may be involved in mobilization of CXCR4(+)VEGFR1(+) cells.
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Affiliation(s)
- Hideki Amano
- Department of Pharmacology, Kitasato University School of Medicine, Kanagawa 252-0374, Japan
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Alexandru N, Popov D, Georgescu A. Intraplatelet oxidative/nitrative stress: inductors, consequences, and control. Trends Cardiovasc Med 2012; 20:232-8. [PMID: 22293024 DOI: 10.1016/j.tcm.2011.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
This article provides an overview of the current knowledge on intraplatelet oxidative/nitrative stress, an abnormality associated with platelet activation and hyper-reactivity. The first issue discussed is related to induction of platelet endogenous stress by the molecules present within the circulating (extracellular) milieu that bathes these cells. The second issue concerns the intraplatelet oxidative/nitrative stress associated with specific pathologies or clinical procedures and action of particular molecules and platelet agonists as well as of the specialized intraplatelet milieu and its redox system; the biomarkers of endogenous oxidative/nitrative stress are also briefly outlined. Next, the association between intraplatelet oxidative/nitrative stress and the risk factors of the metabolic syndrome is presented. Then, the most recent strategies aimed at the control/regulation of platelet endogenous oxidative/nitrative stress, such as exploitation of circulating extracellular reactive oxygen species scavengers, manipulation of platelet molecules, and the use of antioxidants, are discussed. Finally, the results of studies on platelet-dependent redox mechanisms, which deserve immediate attention for potential clinical exploitation, are illustrated.
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Affiliation(s)
- Nicoleta Alexandru
- Petru Poni Institute of Macromolecular Chemistry, 700487 Iasi, Romania. @icbp.ro
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Georgescu A, Alexandru N, Andrei E, Titorencu I, Dragan E, Tarziu C, Ghiorghe S, Badila E, Bartos D, Popov D. Circulating microparticles and endothelial progenitor cells in atherosclerosis: pharmacological effects of irbesartan. J Thromb Haemost 2012; 10:680-91. [PMID: 22303879 DOI: 10.1111/j.1538-7836.2012.04650.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
AIMS This study aimed to (i) employ our newly designed model, the hypertensive-hypercholesterolemic hamster (HH), in order to find out whether a correlation exists between circulating microparticles (MPs), endothelial progenitor cells (EPCs) and their contribution to vascular dysfunction and (ii) to assess the effect of irbesartan treatment on HH animals (HHI). METHODS AND RESULTS The results showed that compared with the control (C) group, HH displayed: (i) a significant increase in plasma cholesterol and triglyceride concentration, and an augmentation of systolic and diastolic arterial blood pressure, and of heart rate; (ii) a marked elevation of MPs and a significant decrease in EPCs; (iii) structural modifications of the arterial wall correlated with altered protein expression of MMP2, MMP9, MMP12, TIMP1, TIMP2 and collagen type I and III; (iv) a considerably altered reactivity of the arterial wall closely correlated with MPs and EPC adherence; and (v) an inflammatory process characterized by augmented expression of P-Selectin, E-Selectin, von Willebrand factor, tissue factor, IL-6, MCP-1 and RANTES. Additionally, the experiments showed the potential of irbesartan to correct all altered parameters in HH and to mobilize EPCs by NO, chemokines and adhesion molecule-dependent mechanisms. CONCLUSIONS Hypertension associated with hypercholesterolemia is accompanied by structural modifications and expression of pro-inflammatory molecules by the vessel wall, the alteration of vascular tone, enhanced release of MPs and reduced EPCs; the ratio between the latter two may be considered as a marker of vascular dysfunction. Irbesartan, which exhibits a pharmacological control on the levels of MPs and EPCs, has the potential to restore homeostasis of the arterial wall.
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Affiliation(s)
- A Georgescu
- Petru Poni' Institute of Macromolecular Chemistry, Iasi, Romania.
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Alexandru N, Popov D, Georgescu A. Platelet dysfunction in vascular pathologies and how can it be treated. Thromb Res 2011; 129:116-26. [PMID: 22035630 DOI: 10.1016/j.thromres.2011.09.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Revised: 09/19/2011] [Accepted: 09/22/2011] [Indexed: 12/17/2022]
Abstract
Cardiovascular diseases are one of the leading causes of morbidity and mortality in industrialized countries, and although many processes play a role in the development of vascular disease, thrombosis is the primary event that precipitates stroke and acute coronary syndromes. The blood platelets are of significant importance in medicine. These cells are involved in many physiological processes, particularly haemostasis through their ability to aggregate and form clots in response to activation. In addition, these dynamic cells display activities that extend beyond thrombosis, including an important role in initiating and sustaining vascular inflammation. The expansion of knowledge from basic and clinical research has highlighted the critical position of platelets in several inflammatory diseases such as arthritis and atherosclerosis. Platelets are emerging as important mediators of inflammation and provide important signals to mediate phenotype of other blood and vascular cells. The important role of platelets in arterial thrombosis and the onset of acute myocardial infarction after atherosclerotic plaque rupture make inhibition of platelet aggregation a critical step in preventing thrombotic events associated with stroke, heart attack, and peripheral arterial thrombosis. However, the use of platelet inhibitors for thrombosis prevention must seek a delicate balance between inhibiting platelet activation and an associated increased bleeding risk. The aim of this review is to up-date the knowledge on platelets physiology and dysfunction in pathologies, such as diabetes mellitus, hypercholesterolemia, and hypertension, emphasizing the link between platelets and the inflammation-related atherosclerosis. The review evaluates the opportunities offered by the novel platelet inhibitors to efficiently alleviate the thrombotic events.
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