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GpIb{alpha}-VWF blockade restores vessel patency by dissolving platelet aggregates formed under very high shear rate in mice
Interactions between platelet glycoprotein (Gp) IIb/IIIa and plasma proteins mediate platelet cross-linking in arterial thrombi. However, GpIIb/IIIa inhibitors fail to disperse platelet aggregates after myocardial infarction or ischemic stroke. These results suggest that stability of occlusive thrombi involves additional and as-yet-unidentified mechanisms. In the present study, we investigated the mechanisms driving platelet cross-linking during occlusive thrombus formation. Using computational fluid dynamic simulations and in vivo thrombosis models, we demonstrated that the inner structure of occlusive thrombi is heteroge...
Source: Blood - May 22, 2014 Category: Hematology Authors: Le Behot, A., Gauberti, M., Martinez De Lizarrondo, S., Montagne, A., Lemarchand, E., Repesse, Y., Guillou, S., Denis, C. V., Maubert, E., Orset, C., Vivien, D. Tags: Platelets and Thrombopoiesis, Thrombosis and Hemostasis Source Type: research

Increased risk of CVD after VT is determined by common etiologic factors
In conclusion, individuals with VT had an increased risk of CVD. This could be explained by common etiologic factors.
Source: Blood - June 13, 2013 Category: Hematology Authors: Roach, R. E. J., Lijfering, W. M., Flinterman, L. E., Rosendaal, F. R., Cannegieter, S. C. Tags: Free Research Articles, Thrombosis and Hemostasis 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

Regulatory T cells are strong promoters of acute ischemic stroke in mice by inducing dysfunction of the cerebral microvasculature
We have recently identified T cells as important mediators of ischemic brain damage, but the contribution of the different T-cell subsets is unclear. Forkhead box P3 (FoxP3)–positive regulatory T cells (Tregs) are generally regarded as prototypic anti-inflammatory cells that maintain immune tolerance and counteract tissue damage in a variety of immune-mediated disorders. In the present study, we examined the role of Tregs after experimental brain ischemia/reperfusion injury. Selective depletion of Tregs in the DEREG mouse model dramatically reduced infarct size and improved neurologic function 24 hours after stroke a...
Source: Blood - January 24, 2013 Category: Hematology Authors: Kleinschnitz, C., Kraft, P., Dreykluft, A., Hagedorn, I., Gobel, K., Schuhmann, M. K., Langhauser, F., Helluy, X., Schwarz, T., Bittner, S., Mayer, C. T., Brede, M., Varallyay, C., Pham, M., Bendszus, M., Jakob, P., Magnus, T., Meuth, S. G., Iwakura, Y., Tags: Thrombosis and Hemostasis Source Type: research

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