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Abstract
Spontaneous platelet aggregation is a trigger for additional development of larger thrombi. Micro-aggregation is observed in 10% of diabetes approximately and blocked by P2Y12 inhibitors, whereas macro-aggregation is associated with overexpression of platelet α2-adrenoreceptors and is not blocked by conventional anti-platelet medicines. We examined the incidence of spontaneous platelet macro-aggregation (SPMA) in acute ischemic stroke and analyzed its clinical characteristics. Out of 665 consecutive acute ischemic strokes, SPMA was found in 10 patients (1.5%, one tenth of micro-aggregation) despite no detection in 588 control subjects. Types of ischemic stroke were 4 atherothrombotic, 4 cardioembolic, and 2 lacunar strokes. Stroke with SPMA exhibited higher (worse) values of modified Rankin Scales (mRS) at discharge (3.00 ± 0.53 vs 1.93 ± 0.07, p = 0.042 by Wilcoxon) compared with stroke without SPMA despite no difference at admission. The proportion of patients who were functionally independent (score 0-2 on the mRS) at discharge was lower in stroke with SPMA compared with stroke without SPMA (p < 0.05 by chi-square test; OR 3.60, 95% CI 1.08-12.03; RR 2.04, 95% CI 1.05-2.86). It was intriguing that severe (high magnitude) SPMA was observed in 4 atherothrombotic stroke. Although anti-platelet therapy underwent, the proportion of atherothrombotic patients who were functionally improved and independent at discharge was lower in the presence of SPMA compared with the absence of SPMA (p < 0.05 by chi-square test). The patients with SPMA were more likely to be older, having major disabilities, being less functionally improved during hospitalization, and being less functionally independent at discharge.
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Harima K, Honda S, Mikami K, Kitajima M, Urushizaka M, Tomisawa T, Hagii J, Metoki H, Yasujima M, Osanai T. Collagen-Induced Platelet Aggregates, Diabetes, and Aspirin Therapy Predict Clinical Outcomes in Acute Ischemic Stroke. J Stroke Cerebrovasc Dis 2019; 28:2302-2310. [PMID: 31174954 DOI: 10.1016/j.jstrokecerebrovasdis.2019.05.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 10/26/2022] Open
Abstract
BACKGROUND Aggregation of platelets is a trigger for additional development of larger thrombi. This study aimed to identify factors that may affect platelet aggregability and their role in clinical outcomes in acute ischemic stroke. METHODS Consecutive acute ischemic stroke patients (n = 352) who were transferred within 24 hours after its onset were enrolled. Peripheral venous blood was sampled to measure platelet aggregability and other parameters. RESULTS Mean values of spontaneous small-sized platelet aggregates and collagen- or adenosine diphosphate (ADP)-induced large-sized aggregates were elevated in acute ischemic stroke. In atherothrombotic stroke (n = 178), collagen and ADP-induced large-sized aggregates were positively correlated with HbA1c, respectively. High incidence of the modified Rankin Scales (mRS) 5-6 at discharge was associated with diabetes complication (odds ratio [OR] 8.77, 95% confidence interval [CI] 1.32-57.56). The proportion of patients who were functionally independent (the mRS 0-2) at discharge was lower in the middle tertile of collagen and ADP-induced large-sized aggregates than their low tertile (OR 2.46, 95% CI 1.09-5.58; OR 2.43, 95% CI 1.05-5.59, respectively). Prestroke administration of aspirin recovered the proportion of independence at discharge (OR 0.25, 95% CI 0.06-0.99), and ameliorated incidence of the mRS 5-6. On logistic regression analysis, diabetes, HbA1c, collagen-induced large-sized aggregates, and prestroke administration of aspirin remained independent predictors of clinical outcomes in atherothrombotic stroke. In cardioembolic and lacunar stroke, no relations with clinical outcomes were found. CONCLUSIONS High plasma level of HbA1c is involved in enhanced platelet aggregability in acute atherothrombotic stroke patients, and prestroke administration of aspirin may be beneficial to clinical outcomes.
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Affiliation(s)
- Kaho Harima
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Sumika Honda
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Kasumi Mikami
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Maiko Kitajima
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Mayumi Urushizaka
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Toshiko Tomisawa
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Joji Hagii
- Hirosaki Stroke and Rehabilitation Center, Hirosaki, Japan
| | | | | | - Tomohiro Osanai
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan.
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Kudoh R, Mikami K, Kitajima M, Aizu K, Kitajima Y, Hagii J, Metoki H, Seino S, Baba Y, Yasujima M, Osanai T. Spontaneous Micro-Aggregation of Platelets Predicts Clinical Outcome in Acute Ischemic Stroke. J Stroke Cerebrovasc Dis 2018; 27:2074-2081. [DOI: 10.1016/j.jstrokecerebrovasdis.2018.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/24/2018] [Accepted: 03/08/2018] [Indexed: 11/29/2022] Open
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Measurement and Clinical Significance of Biomarkers of Oxidative Stress in Humans. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:6501046. [PMID: 28698768 PMCID: PMC5494111 DOI: 10.1155/2017/6501046] [Citation(s) in RCA: 436] [Impact Index Per Article: 62.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 04/26/2017] [Accepted: 05/21/2017] [Indexed: 12/11/2022]
Abstract
Oxidative stress is the result of the imbalance between reactive oxygen species (ROS) formation and enzymatic and nonenzymatic antioxidants. Biomarkers of oxidative stress are relevant in the evaluation of the disease status and of the health-enhancing effects of antioxidants. We aim to discuss the major methodological bias of methods used for the evaluation of oxidative stress in humans. There is a lack of consensus concerning the validation, standardization, and reproducibility of methods for the measurement of the following: (1) ROS in leukocytes and platelets by flow cytometry, (2) markers based on ROS-induced modifications of lipids, DNA, and proteins, (3) enzymatic players of redox status, and (4) total antioxidant capacity of human body fluids. It has been suggested that the bias of each method could be overcome by using indexes of oxidative stress that include more than one marker. However, the choice of the markers considered in the global index should be dictated by the aim of the study and its design, as well as by the clinical relevance in the selected subjects. In conclusion, the clinical significance of biomarkers of oxidative stress in humans must come from a critical analysis of the markers that should give an overall index of redox status in particular conditions.
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Dai B, Wu P, Xue F, Yang R, Yu Z, Dai K, Ruan C, Liu G, Newman PJ, Gao C. Integrin-αIIbβ3-mediated outside-in signalling activates a negative feedback pathway to suppress platelet activation. Thromb Haemost 2016; 116:918-930. [PMID: 27465472 DOI: 10.1160/th16-02-0096] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 07/04/2016] [Indexed: 12/22/2022]
Abstract
Integrin-αIIbβ3-mediated outside-in signalling is widely accepted as an amplifier of platelet activation; accumulating evidence suggests that outside-in signalling can, under certain conditions, also function as an inhibitor of platelet activation. The role of integrin-αIIbβ3-mediated outside-in signalling in platelet activation is disputable. We employed flow cytometry, aggregometry, immunoprecipitation, and immunoblotting to investigate the role of integrin-αIIbβ3-mediated outside-in signalling in platelet activation. Integrin αIIbβ3 inhibition enhances agonist-induced platelet ATP secretion. Human platelets lacking expression of αIIbβ3 exhibited more platelet ATP secretion than their wild-type counterparts. Moreover, integrin-αIIbβ3-mediated outside-in signals activate SHIP-1, which in turn mediates p-Akt dephosphorylation, leading to inactivation of PI3K/Akt signalling. Furthermore, 3AC (SHIP-1 inhibitor) inhibits platelet disaggregation, and promotes platelet ATP secretion. Upon ADP stimulation, Talin is recruited to αIIbβ3, and it is dissociated from αIIbβ3 when platelets disaggregate. In addition, treatment with RUC2, an inhibitor of αIIbβ3, which blocks αIIbβ3-mediated outside-in signalling, can markedly prevent the dissociation of talin from integrin. SHIP1 Inhibitor 3AC inhibits the dissociation of talin from integrin-β3. These results suggest that integrin-αIIbβ3-mediated outside-in signalling can serve as a brake to restrict unnecessary platelet activation by activated SHIP-1, which mediated the disassociation of talin from β3, leading to integrin inactivation and blocking of PI3K/Akt signalling to restrict platelet ATP secretion.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Peter J Newman
- Peter J. Newman, PhD, Blood Research Institute, Blood Center of Wisconsin, Milwaukee, 53711 WI, USA, E-mail:
| | - Cunji Gao
- Cunji Gao, PhD, Chronic Disease Research Institute, Department of Nutrition and Food Hygiene, Zhejiang University School of Public Health, 310058 Hangzhou, China, Tel: +86 571 882 066 00, Fax: +86 571 882 066 00, E-mail:
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Kuriyama N, Mizuno T, Yasuike H, Matsuno H, Kawashita E, Tamura A, Ozaki E, Matsui D, Watanabe I, Koyama T, Miyatani F, Kondo M, Tokuda T, Ohshima Y, Muranishi M, Akazawa K, Takada A, Takeda K, Matsumoto S, Mizuno S, Yamada K, Nakagawa M, Watanabe Y. CD62-mediated activation of platelets in cerebral white matter lesions in patients with cognitive decline. Arch Gerontol Geriatr 2016; 62:118-24. [DOI: 10.1016/j.archger.2015.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 09/02/2015] [Accepted: 09/04/2015] [Indexed: 02/08/2023]
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Davila CD, Vargas F, Huang KHG, Monaco T, Dimou A, Rangaswami J, Figueredo VM. Dipstick proteinuria is an independent predictor of high on treatment platelet reactivity in patients on clopidogrel, but not aspirin, admitted for major adverse cardiovascular events. Platelets 2014; 26:651-6. [PMID: 25354134 DOI: 10.3109/09537104.2014.971000] [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: 11/13/2022]
Abstract
The effectiveness of aspirin and clopidogrel in patients with chronic kidney disease (CKD) suffering from acute cardiovascular events is unclear. High on treatment platelet reactivity (HTPR) has been associated with worse outcomes. Here, we assessed the association of dipstick proteinuria (DP) and renal function on HTPR and clinical outcomes. Retrospective cohort analysis of 261 consecutive, non-dialysis patients admitted for Major Adverse Cardiovascular Events (MACE) that had VerifyNow P2Y12 and VerifyNow Aspirin assays performed. HTPR was defined as P2Y12 reactivity unit (PRU) > 208 for clopidogrel and aspirin reaction units (ARU) > 550 for aspirin. Renal function was classified based on the estimated glomerular filtration rate (eGFR), and dipstick proteinuria was defined as ≥ 30 mg/dl of albumin detected on a spot analysis. All cause mortality, readmissions, and cardiac catheterizations were reviewed over 520 days. In patients on clopidogrel (n = 106), DP was associated with HTPR, independent of eGFR, diabetes mellitus, smoking or use of proton pump inhibitor (AOR = 4.76, p = 0.03). In patients with acute coronary syndromes, HTPR was associated with more cardiac catheterizations (p = 0.009) and readmissions (p = 0.032), but no differences in in-stent thrombosis or re-stenosis were noted in this cohort. In patients on aspirin (n = 155), no associations were seen between DP and HTPR. However, all cause mortality was significantly higher with HTPR in this group (p = 0.038). In this cohort, DP is an independent predictor of HTPR in patients on clopidogrel, but not aspirin, admitted to the hospital for MACE.
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Affiliation(s)
- Carlos D Davila
- a Department of Medicine , Einstein Medical Center , Philadelphia , PA , USA
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The inter-arm difference in systolic blood pressure is a novel risk marker for subclinical atherosclerosis in patients with type 2 diabetes. Hypertens Res 2014; 37:548-52. [DOI: 10.1038/hr.2014.30] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 10/15/2013] [Accepted: 10/25/2013] [Indexed: 02/06/2023]
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Araki SI, Matsuno H, Haneda M, Koya D, Kanno Y, Kume S, Isshiki K, Araki H, Ugi S, Kawai H, Kashiwagi A, Uzu T, Maegawa H. Cilostazol attenuates spontaneous microaggregation of platelets in type 2 diabetic patients with insufficient platelet response to aspirin. Diabetes Care 2013; 36:e92-3. [PMID: 23801816 PMCID: PMC3687274 DOI: 10.2337/dc12-2702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Shin-ichi Araki
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Hiroyuki Matsuno
- Department of Clinical Pathological Biochemistry, Doshisha Women’s Collage Liberal Arts, Kyotanabe, Japan
| | - Masakazu Haneda
- Division of Metabolism and Biosystemic Science, Department of Medicine, Asahikawa Medical College, Asahikawa, Japan
| | - Daisuke Koya
- Division of Diabetology and Endocrinology, Department of Medicine, Kanazawa Medical University, Kahoku-gun, Japan
| | - Yosuke Kanno
- Department of Clinical Pathological Biochemistry, Doshisha Women’s Collage Liberal Arts, Kyotanabe, Japan
| | - Shiniji Kume
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Keiji Isshiki
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Hisazumi Araki
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Satoshi Ugi
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Hiromichi Kawai
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Atsunori Kashiwagi
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Takashi Uzu
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Hiroshi Maegawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Japan
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Coupling factor 6 enhances the spontaneous microaggregation of platelets by decreasing cytosolic cAMP irrespective of antiplatelet therapy. Hypertens Res 2013; 36:520-7. [PMID: 23388886 DOI: 10.1038/hr.2012.231] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The spontaneous microaggregation of platelets (SMAPs) is a marker for the prognosis of patients with cardiovascular diseases. Coupling factor 6 (CF6) binds to the plasma membrane ATP synthase and functions as a pro-atherogenic molecule in the cardiovascular system. However, the role of CF6 in SMAPs and stroke remains unknown. In 650 consecutive patients, including those with acute-onset stroke, and 20 control subjects, platelet-rich plasma (PRP) was obtained, and SMAP was measured using a laser light-scattering aggregometer. The cytosolic cyclic adenosine monophosphate (cAMP) concentration in platelets was measured using an enzyme-linked immunosorbent assay. CF6 increased SMAPs in patients and control subjects to a similar degree by binding to the α- and β-subunits of ATP synthase and inducing intracellular acidosis. It was abolished by PRP pretreatment with antibodies against CF6, and the α- or β-subunit of the plasma membrane ATP synthase, and the ATP synthase inhibitor efrapeptin. CF6 increased SMAPs in patient groups with and without antiplatelet therapy to a similar degree, and no difference was found among the subgroups taking aspirin, thienopyridine or cilostazol. The cytosolic cAMP concentration in platelets was decreased by CF6 in the presence of the direct adenylate cyclase activator forskolin. Pretreatment of PRP with the Gs activator cholera toxin blocked the decrease, whereas the Gi inactivator pertussis toxin and cilostazol had no influence. The CF6-induced acceleration of SMAPs was suppressed by cholera toxin but not by cilostazol or pertussis toxin. CF6 enhanced SMAPs by decreasing cytosolic cAMP. Because it was observed irrespective of antiplatelet agents, CF6 appears to be a novel target for antiplatelet therapy.
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Ay L, Hoellerl F, Ay C, Brix JM, Koder S, Schernthaner GH, Pabinger I, Schernthaner G. Thrombin generation in type 2 diabetes with albuminuria and macrovascular disease. Eur J Clin Invest 2012; 42:470-7. [PMID: 21955218 DOI: 10.1111/j.1365-2362.2011.02602.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Albuminuria is an indicator of cardiovascular morbidity and mortality in patients with type 2 diabetic mellitus (T2DM). MATERIALS AND METHODS In our cross-sectional study, we measured thrombin generation (TG), a key process in haemostasis and a tool to detect an individual's coagulation potential, in normo-, micro- and macroalbuminuria in T2DM with and without macrovascular disease (MVD). The TG-assay was performed, and the TG-curve [including the lag phase, peak thrombin and area under the curve (AUC)] was analysed. RESULTS A total of 160 patients (62 women; mean age ± SD: 67 ± 11 years) with T2DM and normo-, micro- or macroalbuminuria were investigated. Of those, 90 (56%) patients had normoalbuminuria, 40 (25%) microalbuminuria and 30 (19%) macroalbuminuria. The AUC between the groups of patients with normo-, micro- and macroalbuminuria was statistically significantly different [3297 (2785; 3764) vs. 3222 (2381; 3678) vs. 3726 (3153; 4235) nM Thrombin; P = 0AE019]. T2DM patients with MVD (n = 121) had a significantly shorter lag phase [12 (9; 16) vs. 20 (15; 25) min; P < 0AE001], a significantly higher peak thrombin [233 (130; 339) vs. 133 (82; 187) nM; P < 0AE001] and a significantly higher AUC [3464 (2969; 3868) vs. 3091 (2384; 3619) nM Thrombin; P = 0AE01] than T2DM patients without MVD (n = 39), indicating an earlier and higher thrombin generation. CONCLUSION Our results support the hypothesis that TG may be involved in the pathogenesis of MVD in diabetic nephropathy as for the first time, we could show that patients with T2DM in different stages of diabetic nephropathy had disturbances in thrombin generation.
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Affiliation(s)
- Leyla Ay
- Department of Internal Medicine I, Rudolfstiftung Hospital Vienna, Medical University of Vienna, Vienna, Austria
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Hara K, Omori K, Sumioka Y, Aso Y. Spontaneous platelet aggregation evaluated by laser light scatter in patients with type 2 diabetes: effects of short-term improved glycemic control and adiponectin. Transl Res 2012; 159:15-24. [PMID: 22153806 DOI: 10.1016/j.trsl.2011.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 07/16/2011] [Accepted: 07/26/2011] [Indexed: 11/19/2022]
Abstract
Spontaneous platelet aggregation (SPA) is enhanced in patients with type 2 diabetes. Adiponectin may inhibit platelet aggregation. The aims of the current study were to identify factors associated with in vitro SPA measured by a laser light scattering method and to investigate the effects of short-term glycemic control and adiponectin on SPA. In study 1, we investigated platelet aggregation in 20 healthy control subjects and 82 patients with type 2 diabetes. In study 2, we evaluated the changes of SPA and serum high-molecular-weight (HMW) adiponectin after 2 weeks of improved glycemic control in 20 hospitalized diabetic patients. In study 3, using washed platelets from 10 healthy subjects, in vitro SPA was measured over 15 min in the absence or presence of recombinant adiponectin (20 μg/mL). Platelet aggregation was assessed with a laser light scatter aggregometer that measured the size of platelet aggregates. SPA was defined as formation of small aggregates under constant stirring in the absence of any agonists. The area under the curve was calculated for SPA and also for agonist-induced small, medium, and large aggregates. SPA was increased in diabetic patients compared with control subjects. In diabetic patients, SPA was correlated positively with plasma fibrinogen, fasting plasma glucose, glycated albumin, and high-sensitivity C-reactive protein. A stepwise multivariate analysis showed that plasma fibrinogen was the strongest independent determinant of SPA in diabetic patients. In 20 diabetic patients, SPA decreased significantly after 2 weeks of glycemic control. A significant negative correlation was found between changes of SPA and those of HMW adiponectin during treatment. The in vitro study showed that adiponectin inhibited the spontaneous aggregation of washed platelets. In conclusion, hyperfibrinogenemia and hyperglycemia are associated independently with SPA in patients with type 2 diabetes. SPA is reduced after even short-term improvement of glycemic control and adiponectin also inhibits SPA directly.
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Affiliation(s)
- Kenji Hara
- Department of Internal Medicine, Koshigaya Hospital, Dokkyo Medical University, Saitama, Japan
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Wang H, Yan HM, Tang MX, Wang ZH, Zhong M, Zhang Y, Deng JT, Zhang W. Increased serum levels of microvesicles in nonvalvular atrial fibrillation determinated by ELISA using a specific monoclonal antibody AD-1. Clin Chim Acta 2010; 411:1700-4. [PMID: 20637189 DOI: 10.1016/j.cca.2010.07.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 07/06/2010] [Accepted: 07/06/2010] [Indexed: 11/28/2022]
Abstract
BACKGROUND Microvesicles are involved in different pathological processes such as inflammation, coagulation and tumor progression. We intended to establish an immunoaffinity capture method for detecting microvesicles and bioactive effectors carried on them using a specific homemade monoclonal antibody AD-1. By this method we investigated the association of inflammation with platelet activation in patients with nonvalvular atrial fibrillation (NVAF). METHODS A case-control study of 90 Chinese subjects selected in 3 groups: control, paroxysmal AF, and persistent AF. After capturing the microvesicles of serum using a specific monoclonal antibody AD-1, the amounts of LAP, IL-1β and P-selectin loaded on these microvesicles were quantified by either enzyme activity assay (LAP) or ELISA respectively. RESULTS Compared with normal controls, the patients with persistent AF showed significantly increased serum levels of microvesicles (P<0.001), microvesicle-bound IL-1 β (P=0.019) and microvesicle-bound P-selectin (P=0.001). The latter two were significantly correlated with each other (r(2)=0.371, r=0.616, P<0.001). The microvesicle-bound IL-1β (β=0.570, P<0.001) and body weight (β=0.427, P=0.002) were as independent predictors of platelet activation. CONCLUSIONS The method was easy and reproducible. Inflammation may be involved in the activation of platelets in NVAF.
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Affiliation(s)
- Hua Wang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Public Health, Department of Cardiology, Qilu Hospital of Shandong University, Ji'nan, China
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Current literature in diabetes. Diabetes Metab Res Rev 2010; 26:i-xi. [PMID: 20474064 DOI: 10.1002/dmrr.1019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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