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Total 139 results found since Jan 2013.
Elevated Levels of CD64 MFI on Monocyte Subsets Are Associated with a History of Stroke in Sickle Cell Disease
Conclusion: Levels of monocyte subsets have been shown to correlate with clinical outcomes in non-SCD stroke, but to our knowledge this is the first study to examine their roles in ischemic stroke in SCD. The pathophysiology of stroke in SCD is unique and the role of monocytes in it deserves separate study from the role of monocytes in non-SCD stroke. We saw that while monocyte subsets were associated with a history of ischemic stroke, CD64 MFI on all monocyte subsets showed a strong association. We wonder if this may be due to CD64 MFI being a marker for cells which are more adherent to endothelium as has been shown in pr...
Source: Blood - November 21, 2018 Category: Hematology Authors: Curtis, S. A., Balbuena-Merle, R., Devine, L., Zelterman, D., Roberts, J. D., Dearborn-Tomazos, J., Sansing, L., Hendrickson, J. E. Tags: 114. Hemoglobinopathies, Excluding Thalassemia-Clinical: Poster I Source Type: research
A Nationwide Analysis of Outcomes of Stroke in Hospitalized Patients with Essential Thrombocythemia: 2006 to 2014
Conclusions:Patients with ET who are hospitalized with stroke have significantly worse outcomes. This study demonstrated that a statistically significant difference exists among different age groups of patients with ET and stoke who died during hospitalization when stratification is made using age groups and Charlson Score. This study may serve as an initial point to include new risk factors for further risk stratification. Early identification of patients at higher risk may reduce the incidence and decrease the morbidity of stroke in patients with ET.DisclosuresKota: BMS: Honoraria; Novartis: Honoraria; Xcenda: Honoraria;...
Source: Blood - November 21, 2018 Category: Hematology Authors: Ajebo, G., Badin, K., Forehand, W., Guddati, A. K., Kota, V. Tags: 634. Myeloproliferative Syndromes: Clinical: Poster III Source Type: research
Inherited Thrombophilia and the Risk of Arterial Ischemic Stroke: A Systematic Review and Meta-Analysis
Conclusions: Our results suggest that inherited thrombophilias including FVL, PTM, PCD, and PSD are associated with an increased risk of arterial ischemic stroke, particularly in young patients. The association with FVL and PTM is stronger in the homozygous than in the heterozygous state, suggesting a potential dose-response relationship and causal role for inherited thrombophilias. The implications of these findings with respect to the evaluation and management of patients with ischemic stroke require further investigation.DisclosuresCrowther: Alnylam: Equity Ownership; Daiichi Sankyo: Membership on an entity's Board of D...
Source: Blood - November 21, 2018 Category: Hematology Authors: Chiasakul, T., De Jesus, E., Tong, J., Chen, Y., Crowther, M., Garcia, D. A., Chai-Adisaksopha, C., Messe, S. R., Cuker, A. Tags: 331. Pathophysiology of Thrombosis: Poster II Source Type: research
Practice Patterns in the Use of MRI/MRA and Chronic Transfusion Therapy for Monitoring and Treatment of Stroke in Pediatric Patients with Sickle Cell Anemia
Conclusions: The results of the DISPLACE practice patterns survey suggested nearly universal adoption of CRCT for children with abnormal TCD and prior overt stroke across sites. The use of MRI/MRA in detecting potential cerebrovascular abnormalities in the absence of clinical neurologic symptoms and for monitoring patients on CRCT was much more variable, which likely reflects the minimal amount of guidance for the use of MRI/MRA in SCA. Notably, a number of sites were using MRI/MRA to screen pediatric patients for cerebrovascular abnormalities and to monitor patients on CRCT. The variability in responses for MRI/MRA highli...
Source: Blood - November 21, 2018 Category: Hematology Authors: Schlenz, A. M., Mueller, M., Phillips, S., Melvin, C., Adams, R. J., Kanter, J. Tags: 901. Health Services Research-Non-Malignant Conditions: Poster III Source Type: research
Vascular Proteomics Reveals Critical Roles of ADAMTS18 in Stroke Associated with Imbalanced Level of Von Willebrand Factor Versus ADAMTS13
Conclusion and Significance-Results of this first vascular proteomic study of Adamts18 KO mice establish a substantial new resource for investigation of how ADAMTS gene affects cellular phenotypes of stroke. These new findings contribute to inform novel prevention strategies and direct therapeutic development for stroke.DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Zhu, R., Pan, Y.-H., Lu, T., Dang, S., Liao, C.-C., Zhang, W. Tags: 301. Vascular Wall Biology, Endothelial Progenitor Cells, and Platelet Adhesion, Activation, and Biochemistry: Poster III Source Type: research
Low ADAMTS13 activity is associated with an increased risk of ischemic stroke
ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin motif repeats 13) has antithrombotic properties because it cleaves von Willebrand factor (VWF) in smaller, less active multimers. The aim of our study was to investigate prospectively the association between ADAMTS13 activity and ischemic stroke. We included 5941 individuals ≥55 years without a history of stroke or transient ischemic attack (TIA) of the Rotterdam Study, a population-based cohort study. ADAMTS13 activity was measured at inclusion with the FRETS-VWF73 assay and VWF antigen (VWF:Ag) levels by enzyme-linked immunosorbent assay. We assessed ...
Source: Blood - December 17, 2015 Category: Hematology Authors: Sonneveld, M. A. H., de Maat, M. P. M., Portegies, M. L. P., Kavousi, M., Hofman, A., Turecek, P. L., Rottensteiner, H., Scheiflinger, F., Koudstaal, P. J., Ikram, M. A., Leebeek, F. W. G. Tags: Free Research Articles, Thrombosis and Hemostasis, Clinical Trials and Observations Source Type: research
Thrombophilia risk is not increased in children after perinatal stroke
Perinatal stroke causes cerebral palsy and lifelong disability. Specific diseases are definable, but mechanisms are poorly understood. Evidence suggests possible associations between arterial perinatal stroke and prothrombotic disorders, but population-based, controlled, disease-specific studies are limited. Understanding thrombophilia in perinatal stroke informs pathogenesis models and clinical management. We conducted a population-based, prospective, case-control study to determine the association of specific perinatal stroke diseases with known thrombophilias. Children with idiopathic magnetic resonance imaging–cl...
Source: Blood - May 18, 2017 Category: Hematology Authors: Curtis, C., Mineyko, A., Massicotte, P., Leaker, M., Jiang, X. Y., Floer, A., Kirton, A. Tags: Pediatric Hematology, Free Research Articles, Thrombosis and Hemostasis, Vascular Biology, CME article Source Type: research
A Genetic Variant in GOLGB1 Affects Golgi Function and Stroke Risk in Patients with Sickle Cell Disease
Conclusions: Our study has shown that a coding variant in GOLGB1, identified as protective against risk of stroke in patients with SCD, has significant effects on Golgi function in SCD samples. We observed that having the GOLGB1 Y1212C variant resulted in more compact and less fragmented Golgi apparatus. Proteomic analysis showed that SCD patients with the GOLGB1 variant also had significantly lower levels of proteins involved in platelet activation and Golgi trafficking. Our findings suggest a novel role for the Golgi apparatus in controlling protein flux that modulates risk of stroke in SCD.DisclosuresNo relevant conflic...
Source: Blood - November 21, 2018 Category: Hematology Authors: Kotu, V., Dubrelle, J., Baker, J., Jenson, K., Flanagan, J. M. Tags: 113. Hemoglobinopathies, Excluding Thalassemia-Basic and Translational Science: Poster III Source Type: research
Genetic mapping and exome sequencing identify 2 mutations associated with stroke protection in pediatric patients with sickle cell anemia
Stroke is a devastating complication of sickle cell anemia (SCA), occurring in 11% of patients before age 20 years. Previous studies of sibling pairs have demonstrated a genetic component to the development of cerebrovascular disease in SCA, but few candidate genetic modifiers have been validated as having a substantial effect on stroke risk. We performed an unbiased whole-genome search for genetic modifiers of stroke risk in SCA. Genome-wide association studies were performed using genotype data from single-nucleotide polymorphism arrays, whereas a pooled DNA approach was used to perform whole-exome sequencing. In combina...
Source: Blood - April 18, 2013 Category: Hematology Authors: Flanagan, J. M., Sheehan, V., Linder, H., Howard, T. A., Wang, Y.-D., Hoppe, C. C., Aygun, B., Adams, R. J., Neale, G. A., Ware, R. E. Tags: Pediatric Hematology, Red Cells, Iron, and Erythropoiesis Source Type: research
The Role of Hydroxyurea to Prevent Silent Stroke in Sickle Cell Disease: Systematic Review and Meta-Analysis
Chronic blood transfusions are standard of care for stroke prevention in sickle cell disease. We evaluated hydroxyurea's efficacy in preventing silent stroke. We searched for randomized controlled trials (RCTs) and observational studies on Pubmed, CENTRAL, Embase, and Web of Science without using language/time limits. Eligible studies compared hydroxyurea with transfusions or observation to prevent silent stroke. This systematic review adheres to the Cochrane guidelines. Data were pooled using random effects model using STATA to perform meta-analysis. Methodological quality of RCTs was investigated using the Cochrane risk ...
Source: Blood - November 21, 2018 Category: Hematology Authors: Hasson, C., Veling, L., Rico, J. F., Mhaskar, R. Tags: 114. Hemoglobinopathies, Excluding Thalassemia-Clinical: Poster II Source Type: research
Middle Cerebral Artery Velocities Are Inversely Related to Hemoglobin Levels and Acutely Drop in Response to RBC Transfusion: Implications for Stroke Screening in SCD
DiscussionThese data show a striking relationship between anemia and TCD velocity, and that RBC transfusion can alter MCA velocity. Even an 11% increase in hemoglobin such as that seen in the low-responder in Figure 3 could change a patient classification from high-risk to conditional TCD. These data also show the significant sensitivity of MCA velocity to the depth of measurement (Figure 2 & 3). The investigators in the STOP study went to extreme ends to standardize these measurements. Nonetheless, TCD measures may not be done with such rigor in clinical settings. It is clear that standard TCD screening has been of tr...
Source: Blood - November 21, 2018 Category: Hematology Authors: Perumbeti, A., Carreras, O., Detterich, J. A., Shah, P., Sunwoo, J., Khoo, M., Wood, J. C., Coates, T. D. Tags: 114. Hemoglobinopathies, Excluding Thalassemia-Clinical: Poster II Source Type: research
Recurrent Stroke: The Role of Thrombophilia in a Large International Pediatric Stroke Population
CONCLUSIONS:Identifying children at increased for recurrent AIS events is important in intensifying preventative measures. Among 894 Canadian, English and German pediatric stroke patients, 17.9% experienced recurrent AIS at a median of 3.1 months after the index stroke. The presence of more than one prothrombotic risk factor is associated with AIS recurrence in childrenDisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Deveber, G., Kirkham, F. J., Shannon, K., Brandao, L. R., Strater, R., Kenet, G., Clausnizer, H., Moharir, M., Kausch, M., Askalan, R., MacGregor, D., Stoll, M., Torge, A., Dlamini, N., Ganesan, V., Prengler, M., Singh, J., Nowak Goettl, U. Tags: 331. Pathophysiology of Thrombosis: Poster III Source Type: research
Reduced ADAMTS13 activity during TTP remission is associated with stroke in TTP survivors
In conclusion, stroke is common after recovery from TTP and is associated with reduced ADAMTS13 activity during remission.
Source: Blood - September 25, 2019 Category: Hematology Authors: Upreti, H., Kasmani, J., Dane, K., Braunstein, E. M., Streiff, M. B., Shanbhag, S., Moliterno, A. R., Sperati, C. J., Gottesman, R. F., Brodsky, R. A., Kickler, T. S., Chaturvedi, S. Tags: Thrombosis and Hemostasis, Clinical Trials and Observations Source Type: research
PAR1 biased signaling is required for activated protein C in vivo benefits in sepsis and stroke
Activated protein C (APC) cleaves protease-activated receptor 1 (PAR1) in vitro at R46 to initiate beneficial cell signaling; however, thrombin and APC can cleave at R41. To elucidate PAR1-dependent aspects of the pharmacologic in vivo mechanisms of APC, we generated C57BL/6 mouse strains carrying QQ41 or QQ46 point mutations in PAR1 (F2r gene). Using these strains, we determined whether or not recombinant murine signaling-selective APC mutants would reduce septic death or provide neuroprotection against ischemic stroke when mice carried PAR1-homozygous mutations that prevent cleavage at either R41 or R46. Intercrossing PA...
Source: Blood - March 15, 2018 Category: Hematology Authors: Sinha, R. K., Wang, Y., Zhao, Z., Xu, X., Burnier, L., Gupta, N., Fernandez, J. A., Martin, G., Kupriyanov, S., Mosnier, L. O., Zlokovic, B. V., Griffin, J. H. Tags: Plenary Papers, Thrombosis and Hemostasis, Vascular Biology Source Type: research
Results from the Displace Consortium: Practice Patterns on the Use of Transcranial Doppler Screening for Risk of Stroke in Children with Sickle Cell Anemia
Conclusions: Nearly all DISPLACE sites order TCD screening annually, as recommended in the guidelines, with some ordering screening more frequently. A few sites did not report initiation of CRCT per STOP protocol for abnormal TCD results; however, over half of the sites reported following up with an MRI/MRA, which may suggest evaluating for vasculopathy prior to CRCT. Some sites reported beginning HU therapy for abnormal results; this may reflect consideration of patients for whom CRCT is not possible, but data were not collected for confirmation. Interestingly, results suggest a reliance on MRI/MRA since sites commonly re...
Source: Blood - November 21, 2018 Category: Hematology Authors: Phillips, S., Mueller, M., Schlenz, A. M., Melvin, C., Adams, R. J., Kanter, J. Tags: 901. Health Services Research-Non-Malignant Conditions: Poster III Source Type: research
