1
|
Bhatia HS, Becker RC, Leibundgut G, Patel M, Lacaze P, Tonkin A, Narula J, Tsimikas S. Lipoprotein(a), platelet function and cardiovascular disease. Nat Rev Cardiol 2024; 21:299-311. [PMID: 37938756 DOI: 10.1038/s41569-023-00947-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/10/2023] [Indexed: 11/09/2023]
Abstract
Lipoprotein(a) (Lp(a)) is associated with atherothrombosis through several mechanisms, including putative antifibrinolytic properties. However, genetic association studies have not demonstrated an association between high plasma levels of Lp(a) and the risk of venous thromboembolism, and studies in patients with highly elevated Lp(a) levels have shown that Lp(a) lowering does not modify the clotting properties of plasma ex vivo. Lp(a) can interact with several platelet receptors, providing biological plausibility for a pro-aggregatory effect. Observational clinical studies suggest that elevated plasma Lp(a) concentrations are associated with worse long-term outcomes in patients undergoing revascularization. Furthermore, in these patients, those with elevated plasma Lp(a) levels derive more benefit from prolonged dual antiplatelet therapy than those with normal Lp(a) levels. The ASPREE trial in healthy older individuals treated with aspirin showed a reduction in ischaemic events in those who had a single-nucleotide polymorphism in LPA that is associated with elevated Lp(a) levels in plasma, without an increase in bleeding events. In this Review, we re-examine the role of Lp(a) in the regulation of platelet function and suggest areas of research to define further the clinical relevance to cardiovascular disease of the observed associations between Lp(a) and platelet function.
Collapse
Affiliation(s)
- Harpreet S Bhatia
- Division of Cardiovascular Medicine, Sulpizio Cardiovascular Center, University of California San Diego, La Jolla, CA, USA
| | - Richard C Becker
- Heart, Lung and Vascular Institute, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Gregor Leibundgut
- Division of Cardiology, University Hospital of Basel, Basel, Switzerland
| | - Mitul Patel
- Division of Cardiovascular Medicine, Sulpizio Cardiovascular Center, University of California San Diego, La Jolla, CA, USA
| | - Paul Lacaze
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Andrew Tonkin
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Jagat Narula
- Mount Sinai Heart, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sotirios Tsimikas
- Division of Cardiovascular Medicine, Sulpizio Cardiovascular Center, University of California San Diego, La Jolla, CA, USA.
| |
Collapse
|
2
|
Connolly-Andersen AM, Sundberg E, Ahlm C, Hultdin J, Baudin M, Larsson J, Dunne E, Kenny D, Lindahl TL, Ramström S, Nilsson S. Increased Thrombopoiesis and Platelet Activation in Hantavirus-Infected Patients. J Infect Dis 2015; 212:1061-9. [PMID: 25762786 DOI: 10.1093/infdis/jiv161] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 03/06/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Thrombocytopenia is a common finding during viral hemorrhagic fever, which includes hemorrhagic fever with renal syndrome (HFRS). The 2 main causes for thrombocytopenia are impaired thrombopoiesis and/or increased peripheral destruction of platelets. In addition, there is an increased intravascular coagulation risk during HFRS, which could be due to platelet activation. METHODS Thrombopoiesis was determined by quantification of platelet counts, thrombopoietin, immature platelet fraction, and mean platelet volume during HFRS. The in vivo platelet activation was determined by quantification of soluble P-selectin (sP-selectin) and glycoprotein VI (sGPVI). The function of circulating platelets was determined by ex vivo stimulation followed by flow cytometry analysis of platelet surface-bound fibrinogen and P-selectin exposure. Intravascular coagulation during disease was determined by scoring for disseminated intravascular coagulation (DIC) and recording thromboembolic complications. RESULTS The levels of thrombopoietin, immature platelet fraction, and mean platelet volume all indicate increased thrombopoiesis during HFRS. Circulating platelets had reduced ex vivo function during disease compared to follow-up. Most interestingly, we observed significantly increased in vivo platelet activation in HFRS patients with intravascular coagulation (DIC and thromboembolic complications) as shown by sP-selectin and sGPVI levels. CONCLUSIONS HFRS patients have increased thrombopoiesis and platelet activation, which contributes to intravascular coagulation.
Collapse
Affiliation(s)
| | - Erik Sundberg
- Infectious Diseases, Department of Clinical Microbiology Clinical Chemistry, Department of Medical Biosciences, Umeå University, Sweden
| | - Clas Ahlm
- Infectious Diseases, Department of Clinical Microbiology
| | - Johan Hultdin
- Clinical Chemistry, Department of Medical Biosciences, Umeå University, Sweden
| | - Maria Baudin
- Infectious Diseases, Department of Clinical Microbiology
| | - Johanna Larsson
- Clinical Chemistry, Department of Medical Biosciences, Umeå University, Sweden
| | - Eimear Dunne
- Clinical Research Centre, Royal College of Surgeons in Ireland, Dublin
| | - Dermot Kenny
- Clinical Research Centre, Royal College of Surgeons in Ireland, Dublin
| | - Tomas L Lindahl
- Department of Clinical and Experimental Medicine, Linköping University, Sweden
| | - Sofia Ramström
- Department of Clinical and Experimental Medicine, Linköping University, Sweden
| | - Sofie Nilsson
- Clinical Chemistry, Department of Medical Biosciences, Umeå University, Sweden
| |
Collapse
|
3
|
GUO LING, SUN GUIZHI, WANG GUOYU, NING WENHU, ZHAO KAN. Soluble P-selectin promotes acute myocardial infarction onset but not severity. Mol Med Rep 2014; 11:2027-33. [DOI: 10.3892/mmr.2014.2917] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 08/19/2014] [Indexed: 11/06/2022] Open
|
4
|
Esponda OL, Hunter R, Del Río JRR, Washington AV. Levels of soluble TREM-like transcript 1 in patients presenting to the emergency department with chest pain. Clin Appl Thromb Hemost 2014; 21:30-4. [PMID: 25147325 DOI: 10.1177/1076029614547298] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE Recent studies suggest that the soluble triggering receptor expressed on myeloid cells-like transcript 1 (sTLT-1) facilitate atherothrombosis. Therefore, we evaluated sTLT-1 as a functional measure of atherothrombosis in acute coronary syndrome (ACS). METHODS Levels of sTLT-1 were determined by enzyme-linked immunosorbent assay on plasma from patients with potential ACS and compared with an age-matched control group with similar risk factors for cardiovascular disease. RESULTS Of 53 patients enrolled, 19 patients were undergoing ACS (15 unstable angina, 2 non-ST-segment elevated myocardial infarction, and 2 ST-segment elevated myocardial infarction), 5 patients were found with noncardiac chest pain, and 29 were in the control group. The mean plasma sTLT-1 values in the ACS group were 4.644 ng/mL ± 1.277 standard error of the mean (SEM), in the noncardiac chest pain group were 0.708 ng/mL ± 0.427 SEM, and in the control group were 1.007 ng/mL ± 0.098 SEM. CONCLUSION A statistically significant difference exists between patients experiencing cardiogenic chest pain versus controls (P < .05), suggesting sTLT-1 as a potential tool for understanding atherothrombosis in ACS.
Collapse
Affiliation(s)
- Omar L Esponda
- Department of Internal Medicine, Hospital Universitario Dr Ramón Ruiz Arnau, Universidad Central del Caribe, Bayamón, PR, USA
| | - Robert Hunter
- Department of Internal Medicine, Hospital Universitario Dr Ramón Ruiz Arnau, Universidad Central del Caribe, Bayamón, PR, USA Laboratory of Anatomy and Cell Biology, Hospital HIMA San Pablo, Bayamón, PR, USA
| | - José R Rivera Del Río
- Department of Internal Medicine, Hospital Universitario Dr Ramón Ruiz Arnau, Universidad Central del Caribe, Bayamón, PR, USA Laboratory of Anatomy and Cell Biology, Hospital HIMA San Pablo, Bayamón, PR, USA
| | | |
Collapse
|
5
|
de Boer HC, van Oeveren-Rietdijk AM, Rotmans JI, Dekkers OM, Rabelink TJ, van Zonneveld AJ. Activated platelets correlate with mobilization of naïve CD34(+) cells and generation of CD34(+) /KDR(+) cells in the circulation. A meta-regression analysis. J Thromb Haemost 2013; 11:1583-92. [PMID: 23895310 DOI: 10.1111/jth.12315] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Indexed: 11/27/2022]
Abstract
BACKGROUND Bone marrow-derived circulating CD34(+) progenitor cells participate in remodeling and repair of the vasculature. Coexpression of the kinase-insert domain-containing receptor (KDR) has been proposed to identify the regenerative capacity. Recently, we provided evidence that the major fraction of circulating CD34(+) /KDR(+) cells is not mobilized from bone marrow, but is generated at sites of vascular injury through interaction with platelets. OBJECTIVES To determine the relationship between platelet activation, the recruitment of naïve CD34(+) cells and the generation of CD34(+) /KDR(+) progenitor cells in a broad range of (patho)physiologic conditions, a detailed meta-regression analysis was conducted. METHODS/RESULTS Twenty-eight conditions were found in which the numbers of CD34(+) and/or CD34(+) /KDR(+) cells and the levels of soluble P-selectin, as a marker for in vivo platelet activation, were documented. To combine heterogeneous data from 214 selected articles, results were standardized to a uniform scale by calculating standardized mean differences (SMDs) obtained from patient and control cohorts. Subsequently, a random-effects meta-regression analysis was performed on pooled SMDs. CONCLUSIONS Our systemic survey supports a model in which activated platelets are a determinant for mobilization of CD34(+) cells from the bone marrow and the generation of CD34(+) /KDR(+) cells in the circulation.
Collapse
Affiliation(s)
- H C de Boer
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands.
| | | | | | | | | | | |
Collapse
|
6
|
Sun X, Icli B, Wara AK, Belkin N, He S, Kobzik L, Hunninghake GM, Vera MP, Blackwell TS, Baron RM, Feinberg MW. MicroRNA-181b regulates NF-κB-mediated vascular inflammation. J Clin Invest 2012; 122:1973-90. [PMID: 22622040 DOI: 10.1172/jci61495] [Citation(s) in RCA: 270] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 03/14/2012] [Indexed: 12/22/2022] Open
Abstract
EC activation and dysfunction have been linked to a variety of vascular inflammatory disease states. The function of microRNAs (miRNAs) in vascular EC activation and inflammation remains poorly understood. Herein, we report that microRNA-181b (miR-181b) serves as a potent regulator of downstream NF-κB signaling in the vascular endothelium by targeting importin-α3, a protein that is required for nuclear translocation of NF-κB. Overexpression of miR-181b inhibited importin-α3 expression and an enriched set of NF-κB-responsive genes such as adhesion molecules VCAM-1 and E-selectin in ECs in vitro and in vivo. In addition, treatment of mice with proinflammatory stimuli reduced miR-181b expression. Rescue of miR-181b levels by systemic administration of miR-181b "mimics" reduced downstream NF-κB signaling and leukocyte influx in the vascular endothelium and decreased lung injury and mortality in endotoxemic mice. In contrast, miR-181b inhibition exacerbated endotoxin-induced NF-κB activity, leukocyte influx, and lung injury. Finally, we observed that critically ill patients with sepsis had reduced levels of miR-181b compared with control intensive care unit (ICU) subjects. Collectively, these findings demonstrate that miR-181b regulates NF-κB-mediated EC activation and vascular inflammation in response to proinflammatory stimuli and that rescue of miR-181b expression could provide a new target for antiinflammatory therapy and critical illness.
Collapse
Affiliation(s)
- Xinghui Sun
- Department of Medicine, Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Darmanis S, Nong RY, Vänelid J, Siegbahn A, Ericsson O, Fredriksson S, Bäcklin C, Gut M, Heath S, Gut IG, Wallentin L, Gustafsson MG, Kamali-Moghaddam M, Landegren U. ProteinSeq: high-performance proteomic analyses by proximity ligation and next generation sequencing. PLoS One 2011; 6:e25583. [PMID: 21980495 PMCID: PMC3183061 DOI: 10.1371/journal.pone.0025583] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Accepted: 09/06/2011] [Indexed: 11/23/2022] Open
Abstract
Despite intense interest, methods that provide enhanced sensitivity and specificity in parallel measurements of candidate protein biomarkers in numerous samples have been lacking. We present herein a multiplex proximity ligation assay with readout via realtime PCR or DNA sequencing (ProteinSeq). We demonstrate improved sensitivity over conventional sandwich assays for simultaneous analysis of sets of 35 proteins in 5 µl of blood plasma. Importantly, we observe a minimal tendency to increased background with multiplexing, compared to a sandwich assay, suggesting that higher levels of multiplexing are possible. We used ProteinSeq to analyze proteins in plasma samples from cardiovascular disease (CVD) patient cohorts and matched controls. Three proteins, namely P-selectin, Cystatin-B and Kallikrein-6, were identified as putative diagnostic biomarkers for CVD. The latter two have not been previously reported in the literature and their potential roles must be validated in larger patient cohorts. We conclude that ProteinSeq is promising for screening large numbers of proteins and samples while the technology can provide a much-needed platform for validation of diagnostic markers in biobank samples and in clinical use.
Collapse
Affiliation(s)
- Spyros Darmanis
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Rachel Yuan Nong
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Johan Vänelid
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Agneta Siegbahn
- Department of Medical Sciences, Clinical Chemistry, University Hospital, Uppsala, Sweden
| | | | | | - Christofer Bäcklin
- Cancer Pharmacology and Informatics, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Marta Gut
- Centro Nacional de Análisis Genómico, Barcelona, Spain
| | - Simon Heath
- Centro Nacional de Análisis Genómico, Barcelona, Spain
| | | | - Lars Wallentin
- Department of Medical Sciences, Clinical Chemistry, University Hospital, Uppsala, Sweden
| | - Mats G. Gustafsson
- Cancer Pharmacology and Informatics, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Masood Kamali-Moghaddam
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
| | - Ulf Landegren
- Department of Immunology Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Science for Life Laboratory, Uppsala, Sweden
- * E-mail:
| |
Collapse
|
8
|
Affiliation(s)
- Zuzana Motovska
- Third Medical Faculty, Charles University and University Hospital, Kralovske Vinohrady, Prague, Czech Republic.
| | | | | |
Collapse
|
9
|
Soluble P-selectin as a marker of in vivo platelet activation. Clin Chim Acta 2009; 399:88-91. [DOI: 10.1016/j.cca.2008.09.018] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Revised: 09/16/2008] [Accepted: 09/16/2008] [Indexed: 10/21/2022]
|
10
|
Marteau JB, Lambert D, Herbeth B, Marie B, Droesch S, Tregouet DA, Visvikis-Siest S. P-selectin polymorphisms' influences on P-selectin serum concentrations and on their familial correlation: the STANISLAS family study. J Thromb Haemost 2008; 6:920-7. [PMID: 18363816 DOI: 10.1111/j.1538-7836.2008.02952.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND P-selectin is an adhesion molecule known to be involved in the pathogenesis of several diseases through its major role in the initial phase of leukocytes recruitment during inflammation. However, genetic characterization of soluble P-selectin remains unclear. OBJECTIVES In the STANISLAS cohort, we study the familial correlations of P-selectin levels and investigate the association of six P-selectin polymorphisms (C-2123G, A-1969G, S290N, N562D, V599L and T715P) and cardiovascular risk factors with P-selectin concentrations. PATIENTS/METHODS Full phenotypic and genotypic information was available for 136 healthy families composed of both natural parents and at least one child (boys, n = 125; and girls, n = 139) aged more than 4 years. RESULTS While no correlation was observed between spouses, family correlations of P-selectin concentrations were highly significant for sibling (0.50 +/- 0.12, P < 10(-3)) and child-parent pairs (0.42 +/- 0.04, P < 10(-3)). P-selectin haplotypes explained about 25% of the variability of P-selectin concentrations, this effect being mainly due to the additive effects of two polymorphisms, V599L and T715P. After adjusting for the effect of the P-selectin polymorphisms, the sibling and child-parent correlations decreased to (0.39 +/- 0.08, P < 10(-4)) and (0.32 +/- 0.06, P < 10(-4)), respectively. CONCLUSIONS In the present study, we showed that two P-selectin polymorphisms, V599L and T715P, explained about 25% of the variability of P-selectin concentrations and accounted for about 40% of their family resemblance. These results would suggest a genetic influence on P-selectin concentrations beyond the contribution of the P-selectin gene.
Collapse
Affiliation(s)
- J B Marteau
- INSERM, Equipe Génétique Cardiovasculaire du CIC 9501, Nancy, France
| | | | | | | | | | | | | |
Collapse
|
11
|
Yasar AS, Erbay AR, Ayaz S, Turhan H, Metin F, Ilkay E, Sabah I. Increased platelet activity in patients with isolated coronary artery ectasia. Coron Artery Dis 2007; 18:451-4. [PMID: 17700216 DOI: 10.1097/mca.0b013e3282a30665] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The common coexistence with coronary artery disease has led to the suggestion that coronary artery ectasia (CAE) is a variant of coronary artery disease. The mechanisms, however, responsible for CAE formation during the atherosclerotic process and the exact clinical significance are not well known. In this study, we aimed to investigate platelet activity in patients with isolated CAE by using specific markers of platelet activation as P-selectin, beta-thromboglobulin (beta-TG) and platelet factor 4 (PF4). METHODS Thirty-two patients with isolated CAE without significant stenosis and 30 control participants with angiographically normal coronary arteries were included in this study. According to the angiographic definition used in the Coronary Artery Surgery Study, a vessel is considered to be ectasic when its diameter is > or = 1.5 times that of the adjacent normal segment in segmental ectasia. Plasma P-selectin, beta-TG and PF4 levels were measured in all patients and control participants using enzyme-linked immunosorbent assay method. RESULTS Patients with isolated CAE were detected to have significantly higher levels of plasma P-selectin, beta-TG and PF4 in comparison with control participants with angiographically normal coronary arteries (P-selectin: 248+/-46 vs. 154+/-32 ng/ml, respectively, P<0.001; beta-TG: 51+/-19 vs. 21+/-9 ng/ml, respectively, P<0.001; PF4: 58+/-23 vs. 33+/-11 ng/ml, respectively, P<0.001). CONCLUSION In conclusion, we have shown for the first time that patients with isolated CAE have raised levels of plasma P-selectin, beta-TG and PF4 compared with control participants with angiographically normal coronary arteries, suggesting increased platelet activation in patients with CAE.
Collapse
Affiliation(s)
- Ayse Saatci Yasar
- Department of Cardiology, Turkiye Yuksek Ihtisas Hospital, Ankara, Turkey.
| | | | | | | | | | | | | |
Collapse
|
12
|
Radi ZA, Kehrli ME, Ackermann MR. Cell adhesion molecules, leukocyte trafficking, and strategies to reduce leukocyte infiltration. J Vet Intern Med 2002. [PMID: 11817056 DOI: 10.1111/j.1939-1676.2001.tb01586.x] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Leukocyte-endothelial cell interactions are mediated by various cell adhesion molecules. These interactions are important for leukocyte extravasation and trafficking in all domestic animal species. An initial slowing of leukocytes on the vascular endothelium is mediated by selectins. This event is followed by (1) activation of beta2 integrins after leukocyte exposure to cytokines and pro-inflammatory mediators, (2) adherence of leukocyte beta2 integrins to vascular endothelial ligands (eg, intercellular adhesion molecule-1 [ICAM-1]), (3) extravasation of leukocytes into tissues through tight junctions of endothelial cells mediated by platelet and endothelial cell adhesion molecule-1 (PECAM-1), and (4) perivascular migration through the extracellular matrix via beta1 integrins. Inhibiting excessive leukocyte egress and subsequent free radical-mediated damage caused by leukocyte components may attenuate or eliminate tissue damage. Several methods have been used to modify leukocyte infiltration in various animal models. These methods include nonspecific inhibition of pro-inflammatory mediators and adhesion molecules by nonsteroidal anti-inflammatory drugs (NSAIDs) and glucocorticoids, inhibition of cytokines and cytokine receptors, and inhibition of specific types of cell adhesion molecules, with inhibitors such as peptides and antibodies to beta2 integrins, and inhibitors of selectins, ICAMs, and vascular cell adhesion molecule-1 (VCAM-1). By understanding the cellular and molecular events in leukocyte-endothelial cell interactions, therapeutic strategies are being developed in several animal models and diseases in domestic animal species. Such therapies may have clinical benefit in the future to overcome tissue damage induced by excessive leukocyte infiltration.
Collapse
Affiliation(s)
- Z A Radi
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames 50011-1250, USA
| | | | | |
Collapse
|
13
|
Hodgson JM, Puddey IB, Mori TA, Burke V, Baker RI, Beilin LJ. Effects of regular ingestion of black tea on haemostasis and cell adhesion molecules in humans. Eur J Clin Nutr 2001; 55:881-6. [PMID: 11593350 DOI: 10.1038/sj.ejcn.1601231] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2000] [Revised: 02/20/2001] [Accepted: 03/29/2001] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To assess the effects in humans of regular ingestion of black tea on haemostasis-related variables and cell adhesion molecules. DESIGN Twenty-two subjects were recruited from the general population to a randomised-controlled crossover study. Subjects stopped drinking tea, apart from that provided, for the duration of the study. During a 4-week baseline period all subjects drank 5 cups/day (250 ml) of hot water. The effects of 5 cups/day of black tea for 4 weeks were then compared with hot water. Platelet aggregation in response to three doses of collagen and ADP, plasma concentrations of coagulation and fibrinolytic factors (fibrinogen, factor VII, tPA, PAI-1) and plasma concentrations of cell adhesion molecules (soluble P-selectin, E-selectin, ICAM-1, VCAM-1) were assessed twice, one week apart, at the end of each period. Twenty-four hour urinary concentration of 4-O-methylgallic acid (4OMGA), assessed once at the end of each period, was used as a marker of black tea polyphenol intake. RESULTS The 24 h urinary excretion of 4OMGA was increased during regular ingestion of black tea in comparison to hot water (P<0.0001). Black tea resulted in lower soluble P-selectin (P=0.01) in comparison to hot water, but did not influence other adhesion molecules. Soluble P-selectin was significantly correlated with mean collagen-stimulated platelet aggregation at baseline (r=0.61, P=0.003), and during regular ingestion of hot water (r=0.70, P<0.0001) and black tea (r=0.51, P=0.01). However, platelet aggregation was not different between the black tea and hot water periods for collagen- or ADP-stimulated aggregation at any dose. Coagulation and fibrinolytic factors were also not different between periods. CONCLUSIONS The effect of black tea on soluble P-selectin provides a potential mechanism for cardiovascular benefits of regular ingestion of tea. SPONSORSHIP This study was supported by grants from the Tea Trade Health Research Association and the National Heart Foundation of Australia.
Collapse
Affiliation(s)
- J M Hodgson
- University of Western Australia Department of Medicine and HeartSearch, Royal Perth Hospital, Perth, Western Australia, Australia.
| | | | | | | | | | | |
Collapse
|
14
|
Barbaux SC, Blankenberg S, Rupprecht HJ, Francomme C, Bickel C, Hafner G, Nicaud V, Meyer J, Cambien F, Tiret L. Association between P-selectin gene polymorphisms and soluble P-selectin levels and their relation to coronary artery disease. Arterioscler Thromb Vasc Biol 2001; 21:1668-73. [PMID: 11597943 DOI: 10.1161/hq1001.097022] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
P-selectin is a cellular adhesion molecule that mediates the interaction of activated endothelial cells or platelets with leukocytes. Increased levels of soluble P-selectin have been reported in various cardiovascular disorders. We measured serum soluble P-selectin levels as well as 3 polymorphisms of the P-selectin gene (C-2123G, A-1969G, and Thr715Pro) in a large cohort of patients with documented coronary artery disease (n=869) and a healthy control group (n=334). The 3 P-selectin polymorphisms were strongly associated with P-selectin levels and altogether explained 7.3% and 18.6% of the P-selectin variability in patients and controls, respectively. Genotype distributions did not significantly differ between patients and controls. P-selectin levels were increased in patients younger than 55 years of age compared with controls (135.2 vs 114.3 ng/mL, P<0.01). On the contrary, patients older than 65 years of age had significantly lower P-selectin levels than did controls (121.5 vs 134.7 ng/mL, P<0.02). In intermediate age groups, P-selectin levels did not significantly differ between the 2 groups. In conclusion, this study revealed a strong association between P-selectin gene polymorphisms and serum P-selectin levels and a complex age-dependent relation between soluble P-selectin levels and coronary artery disease, which suggests that this molecule might have different roles in the atherothrombotic process.
Collapse
Affiliation(s)
- S C Barbaux
- Institut National de la Santé et de la Recherche Médicale (INSERM) U525, Paris, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Lindmark E, Wallentin L, Siegbahn A. Blood cell activation, coagulation, and inflammation in men and women with coronary artery disease. Thromb Res 2001; 103:249-59. [PMID: 11672587 DOI: 10.1016/s0049-3848(01)00313-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We investigated in some detail the immunologic and procoagulant activation patterns in men and women with unstable (UA, n=26) versus stable (SA, n=40) coronary artery disease (CAD). Leukocyte activation and platelet-leukocyte complex formation were assessed by flow cytometry. Plasma markers of coagulation and inflammation were analyzed. Unstable patients displayed higher levels of platelet-leukocyte complexes (P<.001), of leukocyte CD11b (P<.01), and of T cell HLA-DR (P<.05) than healthy controls did. Female UA patients presented the highest degree of complexes. SA patients only differed significantly from controls with respect to HLA-DR (P=.02). UA patients had higher levels of C-reactive protein (P<.01), IL-6 (P<.001), IL-10 (P<.01), and soluble fibrin (P<.001) than did stable ones. Regarding P-selectin levels, 25% of SA and 50% of UA patients were above normal range. Again, UA women presented the highest marker amounts. As for soluble tissue factor, women had higher levels than men regardless of the severity of disease (P<.001 in SA). We conclude that in unstable coronary syndromes, there is an activation of both coagulation and inflammation that coincides with an increased activation of platelets and leukocytes. Cellular interactions may contribute to the systemic responses observed. Women have different patterns of cellular activation than men, indicating differences in pathogenetic mechanisms.
Collapse
Affiliation(s)
- E Lindmark
- Laboratory for Coagulation Research, Department of Medical Sciences, Clinical Chemistry, University Hospital, S-751 85 Uppsala, Sweden.
| | | | | |
Collapse
|
16
|
Matsubara A, Tomida K, Matsuda Y, Tamai K, Tashita A, Jomori T, Tsujikawa A, Ogura Y. Protective effects of selectin ligands/inhibitor (SKK-60060) against retinal ischemia-reperfusion injury. Exp Eye Res 2000; 71:283-93. [PMID: 10973737 DOI: 10.1006/exer.2000.0880] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A newly developed selSep;71(3)28 to block P- and L-selectins in vitro. We examined its inhibition of leukocyte-endothelial interactions in vivo against retinal ischemia-reperfusion injury and protective effects on ischemia-induced retinal damage. Retinal ischemia was induced by temporary ligation of the optic sheath for 60 min in anesthetized pigmented rats. SKK-60060 was administered 5 min before reperfusion and 4, 12, 24 and 48 hr thereafter, and leukocyte dynamics in the retinal microcirculation were evaluated using acridine orange digital fluorography. After 7 days of reperfusion, ischemia-induced retinal damage was also assessed histologically.SKK-60060 treatment suppressed leukocyte rolling during the reperfusion period; their numbers in the SKK-60060-treated rats were reduced by 67.0% (P < 0. 01) and 53.2% (P < 0.01) at 12 and 24 hr, respectively. The subsequent leukocyte accumulation was also inhibited in SKK-60060-treated rats; accumulated leukocytes in the SKK-60060-treated rats were reduced by 72.8% (P < 0.01) and 53.4% (P < 0.01) at 12 and 24 hr, respectively. Retinal venous vasodilation in SKK-60060-treated rats were significantly suppressed at each time point (P < 0.05). Histological examination demonstrated protective effects of SKK-60060 on ischemia-induced retinal damage, which were more substantial in the inner retina (P < 0.01).SKK-60060 significantly inhibits the leukocyte rolling along the major retinal veins and their accumulation during the reperfusion period. These results suggest therapeutic potential of SKK-60060 for ischemia-reperfusion injury.
Collapse
Affiliation(s)
- A Matsubara
- Department of Ophthalmology, Nagoya City University Medical School, Nagoya, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Vermeiren GL, Claeys MJ, Van Bockstaele D, Grobben B, Slegers H, Bossaert L, Jorens PG. Reperfusion injury after focal myocardial ischaemia: polymorphonuclear leukocyte activation and its clinical implications. Resuscitation 2000; 45:35-61. [PMID: 10838237 DOI: 10.1016/s0300-9572(00)00168-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The only way to rescue ischaemic tissue is to re-instate the oxygen supply to the tissue. However reperfusion of the ischaemic area not only oxygenates the tissue but also initiates a cascade of processes, which may in some cases result in temporary dysfunction of the myocardium. In order to devise protective measures, it is essential to understand the mechanisms and the triggers of this reperfusion phenomenon. In this review we will mainly focus on the inflammatory response caused by reperfusion. We will cover the different steps of polymorphonuclear leukocyte activation and will briefly discuss the molecular biology of the receptors involved. The currently used pharmacological medications in acute cardiology will be reviewed and in particular their actions on polymorphonuclear leukocyte activation, adhesion and degranulation. This review is a compilation of the current knowledge in the field and the therapeutic progress in the prevention of reperfusion injury made today.
Collapse
Affiliation(s)
- G L Vermeiren
- Department of Intensive Care, University Hospital of Antwerp, Belgium
| | | | | | | | | | | | | |
Collapse
|