1
|
Šefer D, Miljić P, Kraguljac-Kurtović N, Bižić-Radulović S, Bogdanović A, Knežević V, Marković D, Beleslin-Čokić B, Novaković I, Marinković J, Leković D, Gotić M, Čokić V. Correlation between leukocyte-platelet aggregates and thrombosis in myeloproliferative neoplasms. Int J Lab Hematol 2021; 44:302-312. [PMID: 34755461 DOI: 10.1111/ijlh.13754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/14/2021] [Accepted: 10/21/2021] [Indexed: 01/31/2023]
Abstract
INTRODUCTION The impact of activated blood and endothelial cells on the thrombosis in myeloproliferative neoplasms (MPN) has not yet been clarified. We prospectively analyzed correlation between circulating leukocyte-platelet aggregates and soluble selectins to thrombosis occurrence in MPN, in the context of standard and cardiovascular risk factors, and different clinical and biological characteristics. METHODS Flow cytometric analysis of neutrophil-platelet (Neu-Plt) and monocyte-platelet (Mo-Plt) aggregates in peripheral blood, as well as quantification of soluble E-/L-/P-selectins by enzyme immunoassay, was performed on 95 newly diagnosed MPN patients. RESULTS During the follow-up, thrombosis occurred in 12.6% MPN patients (arterial 9.4%, venous 3.2%), with a mean time of 39 months. The overall incidence rate of main thrombotic events was 4.36 per 100 patient-years. The incidence of arterial hypertension (HTA) was significantly higher in patients with thrombosis, compared to those without thrombosis (P < .05). The level of soluble P-selectin was significantly higher in patients with thrombosis compared to those without thrombosis (346.89 ng/mL vs 286.39 ng/mL, P = .034). The mean level of Neu-Plt (26.7% vs 22.4%) and Mo-Plt (17.8% vs 12.3%) aggregates did not differ significantly between the groups with and without thrombosis. A multivariate COX proportional hazard regression model confirmed an independent predictive significance of Mo-Plt aggregates (HR = 1.561, 95% CI: 1.007-2.420, P = .046), as well as the cumulative effect of Mo-Plt aggregates and HTA (HR = 1.975, 95%CI: 1.215-3.212, P = .006) for thrombosis occurrence. CONCLUSION Monocyte-platelet aggregates represent an independent risk factor for thrombosis occurrence, further on supported by HTA.
Collapse
Affiliation(s)
- Dijana Šefer
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia
| | - Predrag Miljić
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia.,Medical School, University of Belgrade, Belgrade, Serbia
| | - Nada Kraguljac-Kurtović
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia
| | - Sandra Bižić-Radulović
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia
| | - Andrija Bogdanović
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia.,Medical School, University of Belgrade, Belgrade, Serbia
| | - Vesna Knežević
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia
| | - Dragana Marković
- Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Bojana Beleslin-Čokić
- Clinic of Endocrinology, Diabetes and Metabolic Diseases, University Clinical Center of Serbia, Belgrade, Serbia
| | - Ivana Novaković
- Institute for Human Genetics, Medical School, University of Belgrade, Belgrade, Serbia
| | - Jelena Marinković
- Institute for Medical Statistics and informatics, Medical School, University of Belgrade, Belgrade, Serbia
| | - Danijela Leković
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia.,Medical School, University of Belgrade, Belgrade, Serbia
| | - Mirjana Gotić
- Outpatient Clinic and Diagnostic Department, Clinic of Hematology, University Clinical Center of Serbia, Belgrade, Serbia.,Medical School, University of Belgrade, Belgrade, Serbia
| | - Vladan Čokić
- Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| |
Collapse
|
2
|
Katzman BM, Wockenfus AM, Scott RJ, Bryant SC, Jaffe AS, Karon BS. Estimating short- and long-term reference change values and index of individuality for tests of platelet function. Clin Biochem 2019; 74:54-59. [PMID: 31669512 DOI: 10.1016/j.clinbiochem.2019.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/30/2019] [Accepted: 10/07/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND In order to manage risks of bleeding and thrombosis after some surgical procedures, platelet function is often measured repeatedly over days or weeks using laboratory tests of platelet function. To interpret test results in the perioperative period, it is necessary to understand analytical, biological and between-person variation. METHODS We collected three separate blood specimens from 16 healthy volunteers on the first study day, and one additional specimen from each volunteer 1, 2, and 3 months later. Arachidonic acid-induced and adenosine diphosphate (ADP)-induced platelet function were measured in duplicate by whole blood impedance aggregometry using Multiplate (ASPI/ADP tests) and VerifyNow (Aspirin Reaction Units [ARU] and P2Y12 Reaction Units [PRU]). The analytical variation (CVA), within-subject variation (CVI), between-subject variation (CVG), index of individuality (II), and reference change values (RCV) were calculated. RESULTS VerifyNow ARU demonstrated the smallest short-term and long-term variability (CVA, CVI, and CVG ~1%), resulting in short- and long-term RCV values <5%. II was also higher (1.92) for VerifyNow ARU than other platelet function tests. Multiplate ASPI and ADP tests had the highest RCV both short-(19.0% and 25.2%, respectively) and long-term (32.1% and 39.6%, respectively) due to increased CVA (>5%) and CVI (3.9-13.1%). VerifyNow PRU had a lower RCV than Multiplate ADP; but was the only test with II <0.6. CONCLUSIONS VerifyNow ARU results can be interpreted relative to a fixed cut-off or population-based reference interval; or relative to small changes in an individual's previous values. VerifyNow PRU and Multiplate ASPI and ADP tests should only be interpreted based upon relative change; and can only distinguish relatively large (>23%) changes over several weeks.
Collapse
Affiliation(s)
- Brooke M Katzman
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - Amy M Wockenfus
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - Renee J Scott
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - Sandra C Bryant
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, United States
| | - Allan S Jaffe
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States; Department of Cardiology, Mayo Clinic, Rochester, MN, United States
| | - Brad S Karon
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States.
| |
Collapse
|
3
|
Association of monocyte myeloperoxidase with incident cardiovascular disease: The Atherosclerosis Risk in Communities Study. PLoS One 2018; 13:e0205310. [PMID: 30300402 PMCID: PMC6177167 DOI: 10.1371/journal.pone.0205310] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 09/21/2018] [Indexed: 12/21/2022] Open
Abstract
Myeloperoxidase (MPO) is a heme-containing peroxidase found in azurophilic granules of neutrophils and monocytes. Epidemiological studies have reported greater plasma MPO concentration to be associated with increased incidence of several cardiovascular diseases (CVD), but the association of intracellular monocyte MPO (mMPO) with CVD is unclear. The prospective population-based Atherosclerosis Risk in Communities (ARIC) cohort study measured mMPO using flow cytometry in 1,465 participants. The association of mMPO with incident cardiovascular disease (CVD, comprising incident coronary heart disease (CHD), heart failure, stroke, peripheral artery disease, and cardiovascular mortality) was examined over a median 9.6 years of follow-up (n = 290 CVD events). There was no statistically significant association between mMPO and all incident CVD events in either age, sex, and race-adjusted proportional hazards models (HR (95% CI) across tertiles of mMPO: 1, 1.09 (0.76, 1.57), and 0.78 (0.52, 1.15), P-trend = 0.21) or adjusted for other major CVD risk factors (HR (95% CI): 1, 1.17 (0.81, 1.69), and 0.87 (0.58, 1.29), P-trend = 0.50). There also was no association between mMPO tertiles and incident CHD, heart failure, or all-cause mortality, examined separately. In conclusion, intracellular monocyte myeloperoxidase was not associated with incident cardiovascular disease in this prospective population-based study.
Collapse
|
4
|
Yi X, Lin J, Luo H, Zhou J, Zhou Q, Wang Y, Wang C. Interactions among variants in TXA2R, P2Y12 and GPIIIa are associated with carotid plaque vulnerability in Chinese population. Oncotarget 2018; 9:17597-17607. [PMID: 29707133 PMCID: PMC5915141 DOI: 10.18632/oncotarget.24801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/12/2018] [Indexed: 01/30/2023] Open
Abstract
PURPOSE The associations between variants in platelet activation-relevant genes and carotid plaque vulnerability are not fully understood. The aim of the present study was to investigate the associations of the variants in platelet activation-relevant genes and interactions among these variants with carotid plaque vulnerability. RESULTS There were no significant differences in the frequencies of genotypes of the 11 variants between patients and controls. Among 396 patients, 102 patients had not carotid plaque, 106 had VP, and 188 had SP. The 11 variants were not independently associated with risk of carotid plaque vulnerability after adjusting for potential confounding variables. However, the GMDR analysis showed that there were synergistic effects of gene-gene interactions among TXA2Rr s1131882, GPIIIa rs2317676 and P2Y12 rs16863323 on carotid plaque vulnerability. The high-risk interactions among the three variants were associated with high platelet activation, and independently associated with the risk of carotid plaque vulnerability. METHODS Eleven variants in platelet activation-relevant genes were examined using mass spectrometry methods in 396 ischemic stroke patients and 291controls. Platelet-leukocyte aggregates and platelet aggregation were also measured. Carotid plaques were assessed by B-mode ultrasound. According to the results of ultrasound, the patients were stratified into three groups: non-plaque group, vulnerable plaque (VP) group and stable plaque (SP) group. Furthermore, gene-gene interactions were analyzed using generalized multifactor dimensionality reduction (GMDR) methods. CONCLUSIONS The rs1131882, rs2317676, and rs16863323 three-loci interactions may confer a higher risk of carotid plaque vulnerability, and might be potential markers for plaque instability.
Collapse
Affiliation(s)
- Xingyang Yi
- Department of Neurology, The People's Hospital of Deyang City, Deyang 618000, Sichuan, China
| | - Jing Lin
- Department of Neurology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325200, Zhejiang, China
| | - Hua Luo
- Department of Neurology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Ju Zhou
- Department of Neurology, The People's Hospital of Deyang City, Deyang 618000, Sichuan, China
| | - Qiang Zhou
- Department of Neurology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325200, Zhejiang, China
| | - Yanfen Wang
- Department of Neurology, The People's Hospital of Deyang City, Deyang 618000, Sichuan, China
| | - Chun Wang
- Department of Neurology, The People's Hospital of Deyang City, Deyang 618000, Sichuan, China
| |
Collapse
|
5
|
Berger R, Hammer A, Hutuleac R, Koppensteiner R, Kopp C, Steiner S, Moertl D. Dose-dependent decrease of platelet activation and tissue factor by omega-3 polyunsaturated fatty acids in patients with advanced chronic heart failure. Thromb Haemost 2017; 106:457-65. [DOI: 10.1160/th11-03-0169] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2011] [Accepted: 05/26/2011] [Indexed: 11/05/2022]
Abstract
SummaryChronic heart failure (CHF) is characterised by activation of neuroendocrine and inflammatory pathways, and both are linked to a prothrombotic state. Treatment with omega-3 polyunsaturated fatty acids (n3-PUFA) showed significant benefits including mortality reduction in CHF, but exact mechanisms of action are still unclear. We investigated the effects of n3-PUFA on markers of platelet activation and thrombogenesis in patients with severe CHF. Thirty-six patients with non-ischaemic CHF (LVEF<35%, NYHA class>2) under optimised therapy were randomised to supplementation with 1g/day or 4g/day n3-PUFA, or placebo for 12 weeks. Using whole-blood flow cytometry, monocyteplatelet aggregates characterised by CD14+/CD42b+ co-expression and monocytic tissue factor (TF) were determined. Plasma levels of P-selectin, sCD40L, fibrinogen, prothrombin fragment F1.2, TF and proinflammatory markers (high sensitive[hs] interleukin-6, hsCRP, hsTNFalpha, monocyte chemotactic protein-1) were measured by immunoassay. Supplementation with 1g/day and 4g/day n3-PUFA but not placebo significantly reduced monocyte-platelet aggregates in a dose-dependent manner (p for trend=0.02 across the groups). A dose of 4g/day but not 1g/day n3-PUFA significantly decreased P-selectin (p=0.03). Plasma TF decreased dose-dependently upon n3-PUFA supplementation (p for trend=0.02), paralleled by a significant decrease of TF+-monocytes (p for trend=0.01). The amount of 4g/day n3-PUFA exhibited modest anti-inflammatory effects with a significant reduction of hs interleukin-6 (p<0.01) and a trend-wise reduction of hsTNF-alpha (p=0.09). No changes were seen for sCD40L, fibrinogen, hsCRP and monocyte chemotactic protein-1, while F1.2 was decreased by 4g/day n3-PUFA (P=0.03). In patients with severe non-ischaemic CHF, treatment with n3-PUFA leads to a dose-dependent decrease of platelet activation and TF. Higher dosage exhibits also anti-inflammatory effects.* ClinicalTrials.gov registration number: NCT00149409
Collapse
|
6
|
Dai Perrard XY, Lian Z, Bobotas G, Dicklin MR, Maki KC, Wu H. Effects of n-3 fatty acid treatment on monocyte phenotypes in humans with hypertriglyceridemia. J Clin Lipidol 2017; 11:1361-1371. [PMID: 28942094 PMCID: PMC5698114 DOI: 10.1016/j.jacl.2017.08.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 07/26/2017] [Accepted: 08/22/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND Hypertriglyceridemia increases risk for atherosclerotic cardiovascular disease and may contribute to atherosclerosis by changing circulating monocyte phenotypes. High-dose n-3 polyunsaturated fatty acids reduce blood triglyceride levels. Effects of triglyceride-lowering therapy on monocyte phenotypes are not well known. OBJECTIVE We examined effects of n-3 polyunsaturated fatty acid treatments (eicosapentaenoic acid [EPA] plus docosapentaenoic acid [MAT9001] vs EPA ethyl esters [EPA-EE]) on monocyte phenotypes in individuals with hypertriglyceridemia. METHODS Individuals with triglycerides 200 to 400 mg/dL were recruited. Subjects received 2 treatments in randomized order for 14 days each: MAT9001 and EPA-EE, at 4 g/d. At 2 days before the start of, and on the last day of, each treatment, nile red staining for lipids and phenotypes of each monocyte subset were examined by flow cytometry after an overnight fast and postprandially after a high-fat meal. RESULTS Treatment with MAT9001 or EPA-EE reduced fasting triglyceride levels and decreased proportions of intermediate monocytes. Only MAT9001 decreased postprandial blood triglyceride levels, lowered fasting nile red levels, indicating less lipid in classical and intermediate monocytes, and reduced postprandial CD11c levels on nonclassical monocytes. MAT9001 and EPA-EE each reduced fasting and postprandial CD11c and CD36 levels on classical and intermediate monocytes and postprandial CCR5 levels on intermediate and nonclassical monocytes, with no significant differences between the 2 treatments. CONCLUSIONS Treatment with MAT9001 in individuals with hypertriglyceridemia reduced fasting nile red staining for lipids in classical and intermediate monocytes. MAT9001 and EPA-EE each improved fasting and postprandial monocyte phenotypes, which could potentially help to protect against atherosclerosis.
Collapse
Affiliation(s)
| | - Zeqin Lian
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | | | - Mary R Dicklin
- Midwest Biomedical Research/Center for Metabolic and Cardiovascular Health, Glen Ellyn, IL, USA
| | - Kevin C Maki
- Midwest Biomedical Research/Center for Metabolic and Cardiovascular Health, Glen Ellyn, IL, USA
| | - Huaizhu Wu
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA; Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
| |
Collapse
|
7
|
Min BW, Koo KH, Park YS, Oh CW, Lim SJ, Kim JW, Lee KJ, Lee YK. Scoring System for Identifying Impending Complete Fractures in Incomplete Atypical Femoral Fractures. J Clin Endocrinol Metab 2017; 102:545-550. [PMID: 27802096 DOI: 10.1210/jc.2016-2787] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Accepted: 10/26/2016] [Indexed: 01/22/2023]
Abstract
CONTEXT Although impending incomplete atypical femoral fractures (AFFs) require prophylactic fixation, there is still a lack of study on predicting complete fracture among the incomplete AFFs. OBJECTIVE Our purposes are to develop a scoring system to predict progression into complete fracture and to evaluate its reliability and validity. DESIGN, SETTING, AND PATIENTS We reviewed 46 incomplete AFFs in 44 patients who did not undergo prophylactic fixation. A weighted scoring system, including four identified risk factors (the site, severity of pain, status of the contralateral femur, and the extent of radiolucent line), was developed. We evaluated its interobserver reliability by using intraclass correlation coefficiency (ICC) and its accuracy using receiver operator characteristic (ROC) curve. The validity of the scoring system was tested in a different cohort. INTERVENTION Observational study. MAIN OUTCOME MEASURE Progression to complete fracture within 6 months. RESULTS Among 46 incomplete fractures, 13 developed a complete fracture within 6 months. The probability of complete fracture increased abruptly when the score was 8 points or more. The proposed scoring system showed an almost perfect reliability (ICC, 0.997; 95% confidence interval, 0.995 to 0.998) and higher accuracy than any single risk factor in ROC curve. In the different series, the positive predictive value was 100% and the sensitivity was 75%, when cutoff value was 8 points. CONCLUSION The progression to complete fracture could be predicted by using our scoring system. Incomplete AFF with scores <8 points can be treated conservatively, whereas lesions with scores ≥8 require prophylactic fixation.
Collapse
Affiliation(s)
- Byung-Woo Min
- Department of Orthopaedic Surgery, Keimyung University, Dongsan Medical Center, Daegu 41931, South Korea
| | - Kyung-Hoi Koo
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seongnam 13620, South Korea
| | - Youn-Soo Park
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine Seoul 06351, South Korea; and
| | - Chang-Wug Oh
- Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu 41944, South Korea
| | - Seung-Jae Lim
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine Seoul 06351, South Korea; and
| | - Joon-Woo Kim
- Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu 41944, South Korea
| | - Kyung-Jae Lee
- Department of Orthopaedic Surgery, Keimyung University, Dongsan Medical Center, Daegu 41931, South Korea
| | - Young-Kyun Lee
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seongnam 13620, South Korea
| |
Collapse
|
8
|
Lee H, Chae S, Park J, Bae J, Go EB, Kim SJ, Kim H, Hwang D, Lee SW, Lee SY. Comprehensive Proteome Profiling of Platelet Identified a Protein Profile Predictive of Responses to An Antiplatelet Agent Sarpogrelate. Mol Cell Proteomics 2016; 15:3461-3472. [PMID: 27601597 DOI: 10.1074/mcp.m116.059154] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Indexed: 01/25/2023] Open
Abstract
Sarpogrelate is an antiplatelet agent widely used to treat arterial occlusive diseases. Evaluation of platelet aggregation is essential to monitor therapeutic effects of sarpogrelate. Currently, no molecular signatures are available to evaluate platelet aggregation. Here, we performed comprehensive proteome profiling of platelets collected from 18 subjects before and after sarpogrelate administration using LC-MS/MS analysis coupled with extensive fractionation. Of 5423 proteins detected, we identified 499 proteins affected by sarpogrelate and found that they strongly represented cellular processes related to platelet activation and aggregation, including cell activation, coagulation, and vesicle-mediated transports. Based on the network model of the proteins involved in these processes, we selected three proteins (cut-like homeobox 1; coagulation factor XIII, B polypeptide; and peptidylprolyl isomerase D) that reflect the platelet aggregation-related processes after confirming their alterations by sarpogrelate in independent samples using Western blotting. Our proteomic approach provided a protein profile predictive of therapeutic effects of sarpogrelate.
Collapse
Affiliation(s)
- Hangyeore Lee
- From the ‡Department of Chemistry, Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Sehyun Chae
- §Department of New Biology and Center for Plant Aging Research, Institute for Basic Science, Daegu Gyeongbuk Institute of Science and Technology, Daegu, 42988, Republic of Korea
| | - Jisook Park
- ¶Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, 06351, Republic of Korea.,‖Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, 06351, Republic of Korea
| | - Jingi Bae
- From the ‡Department of Chemistry, Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Eun-Bi Go
- ‖Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, 06351, Republic of Korea
| | - Su-Jin Kim
- From the ‡Department of Chemistry, Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Hokeun Kim
- From the ‡Department of Chemistry, Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Daehee Hwang
- §Department of New Biology and Center for Plant Aging Research, Institute for Basic Science, Daegu Gyeongbuk Institute of Science and Technology, Daegu, 42988, Republic of Korea;
| | - Sang-Won Lee
- From the ‡Department of Chemistry, Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea;
| | - Soo-Youn Lee
- ¶Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, 06351, Republic of Korea;
| |
Collapse
|
9
|
Polfus L, Khajuria R, Schick U, Pankratz N, Pazoki R, Brody J, Chen MH, Auer P, Floyd J, Huang J, Lange L, van Rooij F, Gibbs R, Metcalf G, Muzny D, Veeraraghavan N, Walter K, Chen L, Yanek L, Becker L, Peloso G, Wakabayashi A, Kals M, Metspalu A, Esko T, Fox K, Wallace R, Franceschini N, Matijevic N, Rice K, Bartz T, Lyytikäinen LP, Kähönen M, Lehtimäki T, Raitakari O, Li-Gao R, Mook-Kanamori D, Lettre G, van Duijn C, Franco O, Rich S, Rivadeneira F, Hofman A, Uitterlinden A, Wilson J, Psaty B, Soranzo N, Dehghan A, Boerwinkle E, Zhang X, Johnson A, O’Donnell C, Johnsen J, Reiner A, Ganesh S, Sankaran V. Whole-Exome Sequencing Identifies Loci Associated with Blood Cell Traits and Reveals a Role for Alternative GFI1B Splice Variants in Human Hematopoiesis. Am J Hum Genet 2016; 99:481-8. [PMID: 27486782 DOI: 10.1016/j.ajhg.2016.06.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 06/20/2016] [Indexed: 01/26/2023] Open
Abstract
Circulating blood cell counts and indices are important indicators of hematopoietic function and a number of clinical parameters, such as blood oxygen-carrying capacity, inflammation, and hemostasis. By performing whole-exome sequence association analyses of hematologic quantitative traits in 15,459 community-dwelling individuals, followed by in silico replication in up to 52,024 independent samples, we identified two previously undescribed coding variants associated with lower platelet count: a common missense variant in CPS1 (rs1047891, MAF = 0.33, discovery + replication p = 6.38 × 10(-10)) and a rare synonymous variant in GFI1B (rs150813342, MAF = 0.009, discovery + replication p = 1.79 × 10(-27)). By performing CRISPR/Cas9 genome editing in hematopoietic cell lines and follow-up targeted knockdown experiments in primary human hematopoietic stem and progenitor cells, we demonstrate an alternative splicing mechanism by which the GFI1B rs150813342 variant suppresses formation of a GFI1B isoform that preferentially promotes megakaryocyte differentiation and platelet production. These results demonstrate how unbiased studies of natural variation in blood cell traits can provide insight into the regulation of human hematopoiesis.
Collapse
|
10
|
Srikanth S, Sy F, Kotak K, Kiel RG, Bajwa M, Tandon A, Loures-Vale AA, Aftab W, Tringali S, Ambrose JA. A Single Controlled Exposure to Secondhand Smoke May Not Alter Thrombogenesis or Trigger Platelet Activation. Nicotine Tob Res 2015; 18:580-4. [PMID: 26101293 DOI: 10.1093/ntr/ntv133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 06/09/2015] [Indexed: 01/29/2023]
Abstract
INTRODUCTION Chronic secondhand smoke (SHS) exposure increases cardiovascular events, particularly acute thrombotic events. There are little human data on acute SHS exposure. The aim of this study was to determine whether a single controlled exposure of humans to SHS increased thrombogenesis. METHODS After 6-8 hours fast, subjects (n = 50) were exposed to constant dose SHS (particulate level of 500 μg/m(3)) for 120 minutes in a temperature-regulated and ventilated, simulated bar environment. Blood was drawn before and immediately after SHS exposure for thromboelastography (TEG) and flow cytometry. Maximum clot strength (MA) was measured using TEG and platelet leukocyte aggregates (LPA) were measured as an index of platelet activation. Anti-CD 14 antibodies were used as leukocyte markers and anti-CD 41 antibodies as platelet markers for cytometry. Data were analyzed using students' t test for paired samples. RESULTS There was no effect of acute exposure to SHS on platelet activation or thrombogenesis. Also, intra group (smokers [n = 19] and nonsmokers [n = 31]) comparisons of LPA and TEG parameters did not show changes with SHS exposure. CONCLUSIONS While there are abundant data showing enhanced thrombogenesis and platelet activation following repeated exposure to SHS, our study suggests that a single exposure does not appear to significantly alter thrombin kinetics nor result in platelet activation. The effects of SHS on thrombogenesis might be nonlinear.
Collapse
Affiliation(s)
- Sundararajan Srikanth
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Fridolin Sy
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Kamal Kotak
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Richard G Kiel
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Muhammad Bajwa
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Abishek Tandon
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Andreia A Loures-Vale
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Waqqas Aftab
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - Steven Tringali
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| | - John A Ambrose
- Division of Cardiovascular Medicine, University of California San Francisco, Fresno, CA
| |
Collapse
|
11
|
Zheng Y, Yu B, Alexander D, Couper DJ, Boerwinkle E. Medium-term variability of the human serum metabolome in the Atherosclerosis Risk in Communities (ARIC) study. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2014; 18:364-73. [PMID: 24910946 DOI: 10.1089/omi.2014.0019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Metabolomics is a systems biology tool providing small molecule signatures of disease etiology. In order to estimate the biologic variability of the human serum metabolome, this study calculated intraclass correlation coefficients (ICCs) for 178 stably-detected metabolites measured by untargeted chromatography/mass spectrometry. We studied a subsample of 60 participants (57% males, 70% Caucasians, aged 73.77±5.3 years) in the Atherosclerosis Risk in Communities (ARIC) Study who provided two fasting serum samples 4-6 weeks apart. The median ICC across all metabolites was 0.60, and 82% of metabolites had at least fair variability (i.e., ICC>= 0.40). There was variation in the medium-term variability among metabolites, with those in the pathways of amino acid and lipid metabolism showing relatively high ICCs, and those in the carbohydrate pathway showing relatively low ICCs. The results of this study provide a valuable resource for future study design and outcome interpretation of mass spectrometry-based metabolomic studies in epidemiology.
Collapse
Affiliation(s)
- Yan Zheng
- 1 Division of Epidemiology, Human Genetics and Environmental Sciences, University of Texas Health Science Center at Houston , Houston, Texas
| | | | | | | | | |
Collapse
|
12
|
Karon BS, Tolan NV, Koch CD, Wockenfus AM, Miller RS, Lingineni RK, Pruthi RK, Chen D, Jaffe AS. Precision and Reliability of 5 Platelet Function Tests in Healthy Volunteers and Donors on Daily Antiplatelet Agent Therapy. Clin Chem 2014; 60:1524-31. [DOI: 10.1373/clinchem.2014.226332] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
BACKGROUND
Anticoagulation protocols used during mechanical circulatory support call for titration of antiplatelet agents. We compared the precision and reliability of 5 platelet function tests in healthy volunteers and donors on daily antiplatelet therapy to distinguish their efficacy for titrating antiplatelet therapy.
METHODS
We assessed arachidonic acid–induced platelet function by light transmission aggregometry (LTA), Multiplate impedance aggregometry, VerifyNow, and platelet mapping by thromboelastography (TEG PM). We assessed ADP-induced platelet function by the same methods and flow cytometry. Forty healthy volunteers and 10–13 volunteers on daily aspirin and/or clopidogrel therapy were evaluated. We compared tests for intraassay precision, interassay precision (samples from 2 separate blood draws), and reliability coefficient.
RESULTS
For arachidonic acid–induced platelet aggregation in healthy volunteers, intra- and interassay CVs were ≤10% for all methods. Intra- and interassay precision among donors on daily aspirin was ≤30% for all methods except LTA (38% interassay CV) and TEG PM (95% intraassay and 104% interassay CV). For ADP-induced platelet function, intra- and interassay precision was ≤10% and ≤30% for all methods. Only Multiplate demonstrated moderate or greater (R > 0.40) reliability coefficients for arachidonic acid–induced platelet function among all subjects. All methods of ADP-induced platelet function, except TEG PM, demonstrated substantial or greater (R > 0.60) reliability among all subjects.
CONCLUSIONS
TEG PM is least suited to monitor effects of antiplatelet agents. Multiplate impedance aggregometry was the only method to demonstrate an acceptable reliability coefficient among healthy volunteers and donors on both aspirin and clopidogrel therapy.
Collapse
Affiliation(s)
- Brad S Karon
- Department of Laboratory Medicine and Pathology and
| | - Nicole V Tolan
- Current address: Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA
| | | | | | | | - Ravi K Lingineni
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN
| | | | - Dong Chen
- Department of Laboratory Medicine and Pathology and
| | | |
Collapse
|
13
|
Yu HK, Kim SJ, Kim JS. About CD45-/CD31+/CD105+ circulating cells in patients with gynecologic malignancies--response. Clin Cancer Res 2014; 20:1394-5. [PMID: 24590887 DOI: 10.1158/1078-0432.ccr-13-3282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Hyun-Kyung Yu
- Authors' Affiliations: Cancer Biology Team, Mogam Biotechnology Research Institute, Yongin; Biomedical Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea; and Department of Cancer Biology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | | | | |
Collapse
|
14
|
Kwon DG, Sung KH, Chung CY, Park MS, Lee SH, Kim TW, Lee JH, Kim TG, Lee KM. Preliminary findings of morphometric analysis of ankle joint in Korean population. J Foot Ankle Surg 2014; 53:3-7. [PMID: 24370482 DOI: 10.1053/j.jfas.2013.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Indexed: 02/03/2023]
Abstract
The clinical success of ankle joint arthroplasty depends on the availability of information on the morphology of the relevant bones. Thus, the implant design and surgical technique should be adjusted to the ankle morphology. However, few reports have described the characteristics of ankle morphometry in Korean populations. The present study evaluated the characteristics of ankle morphometry in a Korean population sample. Weightbearing ankle radiographs of 100 Korean patients were retrieved, and 13 representative indexes were measured after establishing the reliability of the measurements. Ankle morphometry was analyzed in terms of (1) size diversity, (2) aspect (anteroposterior/mediolateral) ratio, (3) distal anteroposterior inclination angle, and (4) complication-related anatomy. The measurements were compared with those of previous studies of white populations. In terms of size diversity, the ankle morphometry in Koreans was smaller in all parameters, except for the talar width. Koreans had a different aspect ratio than whites. The increase in the distal anteroposterior inclination angle was statistically significant (p < .001), and complication-related indexes were also significantly increased. In addition to the smaller dimensions in Korean populations, surgeons should be aware of the characteristics of Korean patients, such as the steep slope and vulnerability to iatrogenic malleolar fractures.
Collapse
Affiliation(s)
- Dae Gyu Kwon
- Department of Orthopaedic Surgery, In-Ha University Hospital, Kyungki, Korea
| | - Ki Hyuk Sung
- Department of Orthopaedic Surgery, Myongji Hospital, Kwandong University College of Medicine, Kyungki, Korea
| | - Chin Youb Chung
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea
| | - Moon Seok Park
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea
| | - Sang Hyeong Lee
- Department of Orthopaedic Surgery, Dongguk University Ilsan Hospital, Kyungki, Korea
| | - Tae Won Kim
- Department of Othopaedic Surgery, Ulsan Hospital, Ulsan, Korea
| | - Jung Hyun Lee
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea
| | - Tae Gyun Kim
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea.
| | - Kyoung Min Lee
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea
| |
Collapse
|
15
|
Shimizu K, Suzuki N, Imai T, Aizawa K, Nanba H, Hanaoka Y, Kuno S, Mesaki N, Kono I, Akama T. Monocyte and T-cell responses to exercise training in elderly subjects. J Strength Cond Res 2012; 25:2565-72. [PMID: 21685807 DOI: 10.1519/jsc.0b013e3181fc5e67] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The purpose of this study was to examine the effects of exercise training on age-related impairment of immune parameters related to T-cell activation in elderly individuals. Twenty-four elderly subjects were assigned to an exercise training group (EXC: 3 men, 9 women; age 61-76 years) or a nonexercise control group (CON: 4 men, 8 women; age 62-79 years). Subjects in EXC participated in exercise sessions 2 d·wk(-1) for 12 weeks. The training session included stretching and endurance exercise (10 minutes), resistance training comprised leg extension, leg press, hip abduction, and hip adduction using exercise machine and each subject's body weight. Subjects in CON maintained their normal physical activity levels during the study period. Blood samples were collected before and after the training period. Samples were measured for the numbers of leukocytes, lymphocytes, and monocytes, and for CD3(+), CD4(+), CD8(+), CD28(+)CD4(+), CD28(+)CD8(+), TRL-4(+)CD14(+), and CD80(+)CD14(+) cells. The number of leukocytes, lymphocytes, monocytes, CD3(+), CD4(+), and CD8(+) cells did not change after 12 weeks in either EXC or CON. The number of CD28(+)CD8(+) cells increased significantly after training in EXC (p ≤ 0.05), although CON showed no significant change. In the EXC group, CD80(+)CD14(+) cell counts were significantly higher after training (p ≤ 0.05), but the TLR-4(+)CD14(+) cell counts were unchanged. In the CON group, no significant alteration existed in TLR-4(+)CD14(+) and CD80(+)CD14(+) cell numbers. In conclusion, exercise training in elderly people is associated with increased CD28-expressing Tc cells and CD80-expressing monocytes. Therefore, exercise training might upregulate monocyte and T-cell-mediated immunity in elderly people.
Collapse
|
16
|
Shimizu K, Aizawa K, Suzuki N, Masuchi K, Okada H, Akimoto T, Mesaki N, Kono I, Akama T. Influences of weight loss on monocytes and T-cell subpopulations in male judo athletes. J Strength Cond Res 2011; 25:1943-50. [PMID: 21499138 DOI: 10.1519/jsc.0b013e3181e4f9c6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The purpose of this study was to examine weight loss effects on immune function in judo athletes. Six elite male Japanese judo athletes (20.3 ± 0.4 years) were enrolled in this study. They completed usual weight loss programs during 2 weeks preceding an actual competition. Subjects noted the appearance of upper-respiratory tract infection (URTI) symptoms during the study period. Blood samples were obtained at 40 (baseline period: BL) and 3 (weight loss period: WL) days before and 1 day after the competition (AC). The CD3, CD4, CD8, CD56CD3, CD28CD4, CD28CD8, and Toll-like-receptor-4 (TLR-4) CD14 cells were counted by using flow cytometer analysis. The 6 subjects reported 1 headache, 3 runny nose conditions, and 1 coughing instance during the WL. The CD3, CD4, CD8, and CD28CD4 cell counts were significantly lower at WL than at BL (p ≤ 0.05); they reverted to the baseline value at AC. The TLR-4CD14 cells were significantly fewer at WL (p ≤ 0.05); they remained fewer than they had been at BL, even at AC. These results suggest that 2 weeks of weight loss before a competition can impair cell-mediated immune function and induce high susceptibility to URTI in judo athletes. Coaches, support staff, and athletes should monitor athletes' weight loss, hydration status, appearance of URTI symptoms, and immunocompetence such as lymphocytes and monocytes to prevent the physical condition from becoming worse.
Collapse
|
17
|
Arévalo-Lorido JC, Carretero-Gómez J, Villar-Vaca P. Mean platelet volume predicting carotid atherosclerosis in atherothrombotic ischemic stroke. Ir J Med Sci 2011; 181:179-83. [PMID: 21928050 DOI: 10.1007/s11845-011-0755-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 09/02/2011] [Indexed: 11/25/2022]
Abstract
BACKGROUND Platelets are involved in atherosclerosis. Mean platelet volume (MPV) could be a marker of platelet activation. We aim to determine whether MPV levels were correlated with the presence of atherosclerotic disease in carotid arteries of patients with stroke. METHODS We recruited 215 patients with atherothrombotic stroke. All the participants underwent ultrasonographic evaluation of their extracranial carotid arteries. MPV was measured in automated hematology analysis system. The subjects were divided according to plaques and severity of carotid stenosis. Univariate and multivariate statistical analyses and a ROC curve to predict carotid stenosis were performed. RESULTS Univariate analysis showed a positive relationship between MPV and the degree of carotid atherosclerosis (p < 0.00007), and with carotid intima to media thickness (p < 0.00002). In ROC curve, a MPV cut-off of 11.25 fl was obtained for a sensibility of 70% and a specificity of 71% (p < 0.02). Multivariate analysis showed significant correlation with severity of carotid stenosis, when MPV was higher than 11.25 fl (OR: 2.9, p < 0.00007). CONCLUSIONS Our results indicate that an elevated MPV could be an easily measurable marker of severity of carotid stenosis in patients with atherothrombotic stroke.
Collapse
Affiliation(s)
- J C Arévalo-Lorido
- Internal Medicine Service, Zafra County Hospital, Ctra Badajoz-Granada, s/n, 06300, Zafra, Spain.
| | | | | |
Collapse
|
18
|
Lee YK, Chung CY, Koo KH, Lee KM, Kwon DG, Park MS. Measuring acetabular dysplasia in plain radiographs. Arch Orthop Trauma Surg 2011; 131:1219-26. [PMID: 21360130 DOI: 10.1007/s00402-011-1279-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Indexed: 10/18/2022]
Abstract
BACKGROUND Several radiologic parameters have been used to qualify an acetabular coverage in studies determining whether an association exists between acetabular dysplasia and osteoarthritis of hip. However, it is not known which parameter is optimum for these epidemiologic studies. We evaluate the reliability, validity, and robustness of the radiologic parameters of acetabular coverage used in these studies. METHODS Center-edge angle (CEA), acetabular depth (AD), acetabular angle (AA), acetabular roof obliquity (ARO), and roof angle (RA) were evaluated. The components of intra- and interobserver reliability were tested. The correlations between each parameter were used to depict convergent validity. The robustness of the parameters to different projection (urogram), different definitions of the lateral acetabular margin, and a differing pelvic tilt were evaluated. RESULTS The intra- and interobserver reliabilities of CEA, AD and AA ranged from 0.777 to 0.925. The CEA, AD and AA showed acceptable validity in the correlation. The AD on the urograms was 22.0% higher than those on the standing hip radiographs (P < 0.001). When the osteophyte was included in the definition of lateral acetabular margin, the CEA and AD increased significantly (P < 0.001). In simulating pelvic tilting, the AD increased significantly with the anterior pelvic tilt (P < 0.001). The ARO and RA showed poor clinical relevance. CONCLUSION When measuring acetabular dysplasia, the AD is unsuitable for use, because it is not robust to different projection of beam and different pelvic tilts. Furthermore, one should consider that the CEA and AA are significantly influenced by different definitions of lateral acetabular margin.
Collapse
Affiliation(s)
- Young-Kyun Lee
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Bundang-Gu, Sungnam-si, Gyeonggi-do, Korea
| | | | | | | | | | | |
Collapse
|
19
|
Matijevic N, Wu KK, Nidkarni N, Heiss G, Folsom AR. The ARIC carotid MRI study of blood cellular markers: an inverse association of monocyte myeloperoxidase content with peripheral arterial disease. Angiology 2011; 62:237-44. [PMID: 21406422 DOI: 10.1177/0003319710385336] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We evaluated the association of blood monocyte and platelet activation markers with the risk of peripheral artery disease (PAD) in a multicenter study of atherosclerosis among African American and Caucasian patients. Flow cytometric analysis of blood cells was performed in 1791 participants (209 cases with PAD and 1582 noncases) from the cross-sectional Atherosclerosis Risk in Communities Carotid Magnetic Resonance Imaging ([MRI] ARIC Carotid MRI) Study to assess platelet glycoproteins IIb and IIIa, P-selectin, CD40 ligand, platelet-leukocyte aggregates, monocyte lipopolysaccharide receptor, toll-like receptors (TLRs) 2 and 4, P-selectin glycoprotein ligand 1, cyclooxygenase 2, and myeloperoxidase. Multivariate regression analyses evaluated the association of cellular markers with the risk of PAD. After adjusting for age, race, and gender, platelet CD40L, and monocyte myeloperoxidase (mMPO) levels were significantly lower (P < .001), and monocyte TLR-4 levels were higher (P = .03) in patients with PAD. With additional adjustments for conventional risk factors, mMPO remained inversely and independently associated with the risk of PAD (odds ratio [OR]: 0.35, P = .01).
Collapse
Affiliation(s)
- Nena Matijevic
- Department of Surgery, Center for Translational Injury Research, University of Texas Health Science Center-Houston, Houston, TX 77030, USA.
| | | | | | | | | |
Collapse
|
20
|
Bielinski SJ, Hall JL, Pankow JS, Boerwinkle E, Matijevic-Aleksic N, He M, Chambless L, Folsom AR. Genetic variants in TLR2 and TLR4 are associated with markers of monocyte activation: the Atherosclerosis Risk in Communities MRI Study. Hum Genet 2011; 129:655-62. [PMID: 21298446 PMCID: PMC3417332 DOI: 10.1007/s00439-011-0962-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 01/27/2011] [Indexed: 01/25/2023]
Abstract
Markers of monocyte activation play a critical role in atherosclerosis, but little is known about the genetic influences on cellular levels. Therefore, we investigated the influence of genetic variants in monocyte differentiation antigen (CD14), toll-like receptor-4 (TLR4), toll-like receptor-2 (TLR2), and myeloperoxidase (MPO) on monocyte surface receptor levels. The study sample consisted of 1,817 members of a biracial cohort of adults from the Atherosclerosis Risk in Communities Carotid MRI Study. Monocyte receptors were measured using flow cytometry on fasting whole blood samples. TLR2 rs1816702 genotype was significantly associated with CD14+/TLR2+ percent of positive cells (%) and median fluorescence intensity (MFI) in whites but not in blacks (p < 0.001). Specifically, the presence of the minor T-allele was associated with increased receptor levels. In blacks, TLR4 rs5030719 was significantly associated with CD14+/TLR4+ monocytes (MFI) with mean ± SE intensities of 16.7 ± 0.05 and 16.0 ± 0.14 for GG and GT/TT genotypes, respectively (p < 0.001). Variants in TLR2 and TLR4 were associated with monocyte receptor levels of TLR2 and TLR4, respectively, in a biracial cohort of adults. To our knowledge, this is the first study to look at associations between variants in the toll-like receptor family and toll-like receptor levels on monocytes.
Collapse
Affiliation(s)
- Suzette J Bielinski
- Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Harwick Building 6-56, Rochester, MN 55909, USA.
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Agarwal SK, Avery CL, Ballantyne CM, Catellier D, Nambi V, Saunders J, Sharrett AR, Coresh J, Heiss G, Hoogeveen RC. Sources of variability in measurements of cardiac troponin T in a community-based sample: the atherosclerosis risk in communities study. Clin Chem 2011; 57:891-7. [PMID: 21519038 DOI: 10.1373/clinchem.2010.159350] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Application of cardiac troponin T (cTnT) as a marker of myocyte damage requires knowledge of its measurement variability. Using a highly sensitive assay for measurement, we evaluated the long-term storage stability of plasma cTnT at -70 °C and the sources of cTnT variability. METHODS Samples from the Atherosclerosis Risk in Communities study collected in 1996-1998 and 2005-2006 were assayed centrally to quantify variability in cTnT attributable to processing (replicates from same blood draw, n = 87), laboratory (replicates after freeze thaw, n = 29), short-term (n = 40) and long-term biological variation (repeat visit, n = 38), and degradation in frozen storage (n = 7677). RESULTS Approximately 30% of this population-based cohort had cTnT concentrations below the detection limit (3 ng/L). Reliability coefficients for all paired comparisons exceeded 0.93 except for samples drawn 8 years apart (r = 0.36). Sources of cTnT variation (as CVs) were: laboratory, 2.1% and 11.2% in those with and without heart failure, respectively; processing, 18.3%; biological, 16.6% at 6 weeks and 48.4% at 8 years. The reference change value at 6 weeks (68.5%) indicated that 4 samples are needed to determine a homeostatic set point within ±25%. The estimated cTnT degradation rate over the first year in long-term frozen storage was 0.36 ng/L per year. CONCLUSIONS cTnT was detectable in approximately 70% of community-dwelling middle-aged study participants and stable in -70 °C storage. The variability in cTnT attributable to 1 freeze-thaw cycle is of small magnitude. The observed high laboratory and intraindividual (biological) reliability of cTnT support its use for population-based research, and in clinical settings that rely on classification and serial measurements.
Collapse
Affiliation(s)
- Sunil K Agarwal
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Matijevic N, Wu KK, Howard AG, Wasserman B, Wang WYW, Folsom AR, Sharrett AR. Association of blood monocyte and platelet markers with carotid artery characteristics: the atherosclerosis risk in communities carotid MRI study. Cerebrovasc Dis 2011; 31:552-8. [PMID: 21487219 DOI: 10.1159/000324389] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Accepted: 01/11/2011] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Atherosclerosis is characterized by infiltration of inflammatory cells from circulating blood. Blood cell activation could play an important role in plaque formation. METHODS We analyzed the relationship between blood cellular markers and quantitative measures of carotid wall components in 1,546 participants from the ARIC (Atherosclerosis Risk in Communities) Carotid MRI Study. Carotid imaging was performed using a gadolinium contrast-enhanced MRI and cellular phenotyping by flow cytometry. RESULTS Monocyte Toll-like receptor (TLR)-2 is associated with larger plaques, while CD14, myeloperoxidase, and TLR-4 associate with smaller. Platelet CD40L is associated with smaller plaques and thinner caps, while P-selectin is associated with smaller core size. CONCLUSIONS Blood cell activation is significantly associated with atherosclerotic changes of the carotid wall.
Collapse
Affiliation(s)
- N Matijevic
- Center for Translational Injury Research, Department of Surgery, University of Texas Health Science Center at Houston, 77030, USA.
| | | | | | | | | | | | | |
Collapse
|
23
|
Matijevic N, Wang YWW, Kostousov V, Wade CE, Vijayan KV, Holcomb JB. Decline in platelet microparticles contributes to reduced hemostatic potential of stored plasma. Thromb Res 2011; 128:35-41. [PMID: 21421259 DOI: 10.1016/j.thromres.2011.02.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 02/14/2011] [Accepted: 02/16/2011] [Indexed: 10/18/2022]
Abstract
INTRODUCTION In an effort to administer life-saving transfusions quickly, some trauma centers maintain thawed plasma (TP). According to AABB, TP is approved for transfusion for up to five days when stored at 1-6° C. However, the alterations in microparticles (MP) contained in the plasma, which are an integral component of plasma's hemostatic capacity, are not well characterized. We report on MP changes in TP between its initial thaw (FFP-0) and five days (FFP-5) of storage. MATERIALS AND METHODS FFP units (n=30) were thawed at 37° C and kept refrigerated for five days. Phenotypes of residual cells, which include platelets, erythrocytes, leukocytes, monocytes, endothelial cells, and MP counterparts of each cell type, were analyzed by flow cytometry. Functional assays were used for MP procoagulant activity, plasma thrombin generation, and clotting properties (thromboelastography). RESULTS In FFP-0 the majority (94%) of residual cells were platelets, along with significant levels of platelet MPs (4408 × 10(3)/L). FFP-5 showed a decline in MP count by 50% (p<0.0001), and procoagulant activity by 29% (p<0.0001). FFP-5 exhibited only 54% (p<0.0001) of the potential for thrombin generation as FFP-0, while thromboelastography indicated a slower clotting response (p<0.0001) and a longer delay in reaching maximum clot (p<0.01). Removal of MP by filtration resulted in reduced thrombin generation, while the MP replacement restored it. CONCLUSIONS Decline in MP with storage contributes to FFP-5's reduced ability to provide the hemostatic potential exhibited by FFP-0, suggesting the presence of platelet MPs in freshly TP may be beneficial and protective in the initial treatment of hemorrhage.
Collapse
Affiliation(s)
- Nena Matijevic
- Center for Translational Injury Research and Department of Surgery, University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
| | | | | | | | | | | |
Collapse
|
24
|
Association of the platelet GPIIb/IIIa polymorphism with atherosclerotic plaque morphology: the Atherosclerosis Risk in Communities (ARIC) Study. Atherosclerosis 2011; 216:151-6. [PMID: 21353223 DOI: 10.1016/j.atherosclerosis.2011.01.038] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Revised: 01/24/2011] [Accepted: 01/25/2011] [Indexed: 11/23/2022]
Abstract
OBJECTIVES Platelet activation and aggregation play an important role in the pathogenesis of cardiovascular disease. We examined the association of a single nucleotide polymorphism (SNP) in the GPIIIa platelet glycoprotein (Leu33Pro) with carotid artery plaque morphology and with expression of platelet markers using data from the Atherosclerosis Risk in Communities (ARIC) Carotid MRI study. METHODS The study sample consisted of 1202 Caucasian members of the ARIC study cohort recruited in 2004-2005 to participate in the Carotid MRI Substudy under stratified sampling based on maximum carotid artery wall thickness. The Leu33Pro polymorphism was identified as SNP rs5918 in the ITGB3 gene. Plaque visualization was accomplished with contrast enhanced MRI examination of the thickest segment of the carotid artery. Expression of platelet markers was measured using fasting whole blood flow cytometry. RESULTS This cross-sectional analysis based on age and gender adjusted weighted linear regression models suggests that those homozygous for the Leu33Pro risk allele (C) have decreased mean and minimum fibrous cap thickness. We did not observe differences in plaque lipid volume or maximum carotid artery wall thickness across SNP rs5918 genotypes. Carriers of the Leu33Pro polymorphism, as compared to major allele homozygotes, had greater percent of platelets expressing P-selectin, a platelet glycoprotein indicating activation status. Prevalent coronary heart disease did not affect estimates of fibrous cap thickness or of platelet activation. CONCLUSION Our results suggest that individuals with Leu33Pro polymorphism of the GPIIIa glycoprotein may be predisposed to increased risk of atherosclerotic plaque rupture.
Collapse
|
25
|
Nettleton JA, Matijevic N, Follis JL, Folsom AR, Boerwinkle E. Associations between dietary patterns and flow cytometry-measured biomarkers of inflammation and cellular activation in the Atherosclerosis Risk in Communities (ARIC) Carotid Artery MRI Study. Atherosclerosis 2010; 212:260-7. [PMID: 20537646 DOI: 10.1016/j.atherosclerosis.2010.04.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2010] [Revised: 04/14/2010] [Accepted: 04/19/2010] [Indexed: 10/19/2022]
Abstract
BACKGROUND Specific foods and overall dietary patterns are associated with soluble biomarkers of systemic inflammation and endothelial activation. However, no large epidemiological studies have evaluated relationships between such dietary factors and cell-specific markers of activation and inflammation as measured by flow cytometry. METHODS Cell aggregates and multiple platelet and leukocyte markers were quantified by flow cytometry in fresh whole blood from 1101 white adults participating in the Carotid Artery MRI Study, a subset of the larger Atherosclerosis Risk in Communities (ARIC) Study. Two dietary patterns ("Healthy" and "Western") were empirically derived via principal components analysis using data collected by food frequency questionnaire. Cross-sectional associations between dietary patterns and flow cytometry-measured biomarkers were evaluated, adjusting for demographics and lifestyle factors, including medications use. RESULTS After multivariable adjustment, monocyte lipopolysaccharide receptor (CD14), monocyte toll-like receptor-2, and platelet glycoprotein IIb (CD41) showed inverse associations with the Healthy dietary pattern (p=0.01, 0.04, and 0.01, respectively). In contrast, the Western dietary pattern was positively associated with CD41 and platelet-granulocyte aggregates (p=0.01 and 0.04, respectively). Independent of other dietary factors, alcohol consumption was inversely associated with levels of pan-leukocyte marker (CD45), P-selectin (CD62P) on PLA1 and on PLA2 platelets, and platelet-monocyte, platelet-granulocyte, and platelet-lymphocyte aggregates. CONCLUSION Dietary patterns and alcohol intake were each cross-sectionally associated with select markers of cellular activation and inflammation measured by flow cytometry. These data are consistent with the hypothesis that holistic measures of dietary intake are associated with inflammation.
Collapse
Affiliation(s)
- Jennifer A Nettleton
- Division of Epidemiology & Disease Control, The University of Texas Health Sciences Center School of Public Health, 1200 Herman Pressler, Suite E-641, Houston, TX 77030, USA.
| | | | | | | | | |
Collapse
|
26
|
Barbalic M, Dupuis J, Dehghan A, Bis JC, Hoogeveen RC, Schnabel RB, Nambi V, Bretler M, Smith NL, Peters A, Lu C, Tracy RP, Aleksic N, Heeriga J, Keaney JF, Rice K, Lip GYH, Vasan RS, Glazer NL, Larson MG, Uitterlinden AG, Yamamoto J, Durda P, Haritunians T, Psaty BM, Boerwinkle E, Hofman A, Koenig W, Jenny NS, Witteman JC, Ballantyne C, Benjamin EJ. Large-scale genomic studies reveal central role of ABO in sP-selectin and sICAM-1 levels. Hum Mol Genet 2010; 19:1863-72. [PMID: 20167578 DOI: 10.1093/hmg/ddq061] [Citation(s) in RCA: 191] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
P-selectin and intercellular adhesion molecule-1 (ICAM-1) participate in inflammatory processes by promoting adhesion of leukocytes to vascular wall endothelium. Their soluble levels have been associated with adverse cardiovascular events. To identify loci affecting soluble levels of P-selectin (sP-selectin) and ICAM-1 (sICAM-1), we performed a genome-wide association study in a sample of 4115 (sP-selectin) and 9813 (sICAM-1) individuals of European ancestry as a part of The Cohorts for Heart and Aging Research in Genome Epidemiology consortium. The most significant SNP association for sP-selectin was within the SELP gene (rs6136, P = 4.05 x 10(-61)) and for sICAM-1 levels within the ICAM-1 gene (rs3093030, P = 3.53 x 10(-23)). Both sP-selectin and sICAM-1 were associated with ABO gene variants (rs579459, P = 1.86 x 10(-41) and rs649129, P = 1.22 x 10(-15), respectively) and in both cases the observed associations could be accounted for by the A1 allele of the ABO blood group. The absence of an association between ABO blood group and platelet-bound P-selectin levels in an independent subsample (N = 1088) from the ARIC study, suggests that the ABO blood group may influence cleavage of the P-selectin protein from the cell surface or clearance from the circulation, rather than its production and cellular presentation. These results provide new insights into adhesion molecule biology.
Collapse
Affiliation(s)
- Maja Barbalic
- Human Genetics Center, University of Texas Health Science Center at Houston, Houston, TX, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Volcik KA, Catellier D, Folsom AR, Matijevic N, Wasserman B, Boerwinkle E. SELP and SELPLG genetic variation is associated with cell surface measures of SELP and SELPLG: the Atherosclerosis Risk in Communities Carotid MRI Study. Clin Chem 2009; 55:1076-82. [PMID: 19395438 PMCID: PMC2812411 DOI: 10.1373/clinchem.2008.119487] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND P-selectin (SELP) and its ligand, P-selectin glycoprotein ligand 1 (SELPLG), play key roles in both the inflammatory response and the atherosclerotic process. Previous studies have shown genetic variation in the SELP gene [selectin P (granule membrane protein 140 kDa, antigen CD62)] to be associated with plasma SELP concentrations; however, the major biological function of SELP (and SELPLG) is at the cell surface. We therefore investigated the association of SELP polymorphisms with platelet SELP measures and polymorphisms in the SELPLG gene (selectin P ligand) with lymphocyte, granulocyte, and monocyte SELPLG measures among 1870 participants in the Atherosclerosis Risk in Communities (ARIC) Carotid MRI Study. METHODS Whole-blood flow cytometry was used to analyze leukocyte and platelet markers in the ARIC Carotid MRI Study. The allele frequencies for the SELP and SELPLG polymorphisms of whites and African Americans were markedly different; therefore, all analyses were race specific. RESULTS SELP T715P was significantly associated with lower values for platelet SELP measures in whites (P = 0.0001), whereas SELP N562D was significantly associated with higher values for SELP measures in African Americans (P = 0.02). SELPLG M62I was significantly associated with lower granulocyte and monocyte SELPLG measures in African Americans (P = 0.003 and P = 0.0002, respectively) and with lower lymphocyte SELPLG measures in whites (P = 0.01). CONCLUSIONS Specific SELP and SELPLG polymorphisms were associated with cell surface measures of SELP and SELPLG in both whites and African Americans in the ARIC Carotid MRI Study. To our knowledge, this study is the first to examine the association of SELP and SELPLG genetic variation with measures of cell surface SELP and SELPLG.
Collapse
Affiliation(s)
- Kelly A Volcik
- Human Genetics Center, University of Texas Health Science Center School of Public Health, Houston, TX 77030, USA.
| | | | | | | | | | | |
Collapse
|
28
|
Folsom AR, Aleksic N, Sanhueza A, Boerwinkle E. Risk factor correlates of platelet and leukocyte markers assessed by flow cytometry in a population-based sample. Atherosclerosis 2008; 205:272-8. [PMID: 19124123 DOI: 10.1016/j.atherosclerosis.2008.11.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Revised: 11/06/2008] [Accepted: 11/11/2008] [Indexed: 01/24/2023]
Abstract
BACKGROUND Platelet and leukocyte products are involved in atherothrombosis. However, the determinants of platelet and leukocyte markers assessed by flow cytometry have not been documented in a population-based sample. METHODS AND RESULTS We performed flow cytometry on blood from participants (n=1894) in the Atherosclerosis Risk in Communities (ARIC) Carotid MRI Study. Cellular aggregates and multiple platelet and leukocyte markers, such as myeloperoxidase in granulocytes and toll-like receptor-4, CD14, and CD45 in monocytes, were quantified. Their cross-sectional associations with demographic and risk factors were assessed using multiple linear regression. Mean values of most cellular markers and aggregates were considerably higher in blacks than whites (p<0.01). There were some differences in cellular markers between men and women, but little association with age. LDL-cholesterol was associated positively with several markers (toll-like receptor-4 and myeloperoxidase in granulocytes and CD162 in lymphocytes). Cholesterol-lowering therapy tended to show opposite associations. Smokers had much higher granulocyte myeloperoxidase than nonsmokers. However, most other correlations between risk factors and cellular markers were nonsignificant. CONCLUSIONS Race/ethnicity, sex, and to a lesser degree LDL-cholesterol and cholesterol-lowering therapy, but few other risk factors, were correlated with markers of cellular activation in this population-based study.
Collapse
Affiliation(s)
- Aaron R Folsom
- Division of Epidemiology & Community Health, School of Public Health, University of Minnesota, Minneapolis, MN 55454-1015, USA.
| | | | | | | |
Collapse
|