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Total 198 results found since Jan 2013.
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
Activated protein C ameliorates chronic graft-versus-host disease by PAR1-dependent biased cell signaling on T cells
Soluble thrombomodulin plasma concentrations are elevated in steroid-resistant graft-versus-host disease (GVHD), implying endothelial hypofunctioning for thrombomodulin-dependent generation of activated protein C’s (APC) anticoagulant, anti-inflammatory, and antiapoptotic functions. Recombinant thrombomodulin or APC administration decreases acute GVHD, manifested by intense inflammation and tissue destruction. Here, we administered recombinant murine wild-type (WT) APC to mice with established chronic GVHD (cGVHD), a less-inflammatory autoimmune-like disease. WT APC normalized bronchiolitis obliterans–induced p...
Source: Blood - August 28, 2019 Category: Hematology Authors: Sinha, R. K., Flynn, R., Zaiken, M., Paz, K., Gavin, A. L., Nemazee, D., Fernandez, J. A., Xu, X., Griffin, J. H., Blazar, B. R. Tags: Transplantation, Brief Reports Source Type: research
Hydroxyurea reduces cerebral metabolic stress in patients with sickle cell anemia
Chronic transfusion therapy (CTT) prevents stroke in selected patients with sickle cell anemia (SCA). We have shown that CTT mitigates signatures of cerebral metabolic stress, reflected by elevated oxygen extraction fraction (OEF), which likely drives stroke risk reduction. The region of highest OEF falls within the border zone, where cerebral blood flow (CBF) nadirs; OEF in this region was reduced after CTT. The neuroprotective efficacy of hydroxyurea (HU) remains unclear. To test our hypothesis that patients receiving HU therapy have lower cerebral metabolic stress compared with patients not receiving disease-modifying t...
Source: Blood - May 29, 2019 Category: Hematology Authors: Fields, M. E., Guilliams, K. P., Ragan, D., Binkley, M. M., Mirro, A., Fellah, S., Hulbert, M. L., Blinder, M., Eldeniz, C., Vo, K., Shimony, J. S., Chen, Y., McKinstry, R. C., An, H., Lee, J.-M., Ford, A. L. Tags: Sickle Cell Disease, Red Cells, Iron, and Erythropoiesis Source Type: research
How I manage anticoagulant therapy in older individuals with atrial fibrillation or venous thromboembolism
Anticoagulant therapy is the most effective strategy to prevent arterial and venous thromboembolism, but treating older individuals is challenging, because increasing age, comorbidities, and polypharmacy increase the risk of both thrombosis and bleeding. Warfarin and non–vitamin K antagonist oral anticoagulants are underused and often underdosed in the prevention of stroke in older patients with atrial fibrillation because of concerns about the risk of bleeding. Poor adherence to anticoagulant therapy is also an issue for older patients with atrial fibrillation and those at risk of recurrent pulmonary embolism. In th...
Source: Blood - May 22, 2019 Category: Hematology Authors: Chan, N. C., Eikelboom, J. W. Tags: How I Treat, Free Research Articles, Thrombosis and Hemostasis Source Type: research
Characterization and treatment of congenital thrombotic thrombocytopenic purpura
In conclusion, prespacer mutations are associated with earlier development of cTTP symptoms. Prophylactic ADAMTS13 replacement decreases the risk of end-organ damage such as ischemic stroke and resolved previously unrecognized symptoms in patients with nonovert disease.
Source: Blood - April 10, 2019 Category: Hematology Authors: Alwan, F., Vendramin, C., Liesner, R., Clark, A., Lester, W., Dutt, T., Thomas, W., Gooding, R., Biss, T., Watson, H. G., Cooper, N., Rayment, R., Cranfield, T., van Veen, J. J., Hill, Q. A., Davis, S., Motwani, J., Bhatnagar, N., Priddee, N., David, M., Tags: Thrombocytopenia, Platelets and Thrombopoiesis, Clinical Trials and Observations Source Type: research
A genome-wide association study identifies new loci for factor VII and implicates factor VII in ischemic stroke etiology
Factor VII (FVII) is an important component of the coagulation cascade. Few genetic loci regulating FVII activity and/or levels have been discovered to date. We conducted a meta-analysis of 9 genome-wide association studies of plasma FVII levels (7 FVII activity and 2 FVII antigen) among 27 495 participants of European and African ancestry. Each study performed ancestry-specific association analyses. Inverse variance weighted meta-analysis was performed within each ancestry group and then combined for a trans-ancestry meta-analysis. Our primary analysis included the 7 studies that measured FVII activity, and a secondary an...
Source: Blood - February 28, 2019 Category: Hematology Authors: de Vries, P. S., Sabater-Lleal, M., Huffman, J. E., Marten, J., Song, C., Pankratz, N., Bartz, T. M., de Haan, H. G., Delgado, G. E., Eicher, J. D., Martinez-Perez, A., Ward-Caviness, C. K., Brody, J. A., Chen, M.-H., de Maat, M. P. M., Franberg, M., Gill Tags: Thrombosis and Hemostasis Source Type: research
If Trousseau had a stroke
Source: Blood - February 21, 2019 Category: Hematology Authors: Khorana, A. A. Tags: Free Research Articles COMMENTS Source Type: research
Arterial thromboembolic events preceding the diagnosis of cancer in older persons
In conclusion, the risk of arterial thromboembolic events begins to increase 150 days before the date of cancer diagnosis in older persons and peaks in the 30 days before.
Source: Blood - February 21, 2019 Category: Hematology Authors: Navi, B. B., Reiner, A. S., Kamel, H., Iadecola, C., Okin, P. M., Tagawa, S. T., Panageas, K. S., DeAngelis, L. M. Tags: Plenary Papers, Free Research Articles, Thrombosis and Hemostasis, Clinical Trials and Observations Source Type: research
Rivaroxaban Thromboprophylaxis in High-Risk Ambulatory Cancer Patients Receiving Systemic Therapy: Results of a Randomized Clinical Trial (CASSINI)
Conclusions: Rivaroxaban significantly reduced VTE and VTE-related death during the on-treatment period but not during the full study period; over one-third of events occurred post discontinuation of study drug. The incidence of major bleeding was low. The Khorana risk score cut-off of ≥2 identified cancer patients at high risk of thrombotic events both at baseline (4.53%) and during study (8.79% with additional 1.66% arterial events in placebo group). These results should inform future recommendations regarding thromboprophylaxis in at-risk ambulatory cancer patients.(Funded by Janssen; ClinicalTrials.gov number, NCT02...
Source: Blood - November 21, 2018 Category: Hematology Authors: Khorana, A. A., Soff, G. A., Kakkar, A. K., Vadhan-Raj, S., Riess, H., Wun, T., Streiff, M. B., Garcia, D. A., Liebman, H. A., Belani, C., O'Reilly, E. M., Patel, J. N., Yimer, H. A., Wildgoose, P., Burton, P., Vijapurkar, U., Kaul, S., Eikelboom, J., McB Tags: Late-Breaking Abstracts Session Source Type: research
Clinical, Laboratory, and Genetic Risk Factors for Thrombosis in Sickle Cell Disease
In conclusion, thrombotic events are common, occurring in 18% of SCD patients over a 10-year follow-up period. HbSS/Sβ0-thalassemia, frequent hospitalizations, kidney disease, and higher systolic blood pressures and AST concentrations were risk factors for thrombosis. Genome-wide marker array analysis points to a potential role of thrombomodulin in SCD-related thrombotic events based on replicated risk variants in THBD. Future studies integrating clinical, laboratory and genetic risk factors may improve our understanding for thrombosis and guide intervention practices in SCD.DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Srisuwananukorn, A., Raslan, R., Zhang, X., Shah, B. N., Han, J., Gowhari, M., Jain, S., Molokie, R. E., Gordeuk, V. R., Saraf, S. L. Tags: 114. Hemoglobinopathies, Excluding Thalassemia-Clinical: Organ Damage and Clinical Complications in Sickle Cell Disease Source Type: research
Incidence of Bleeding in Patients with Sickle Cell Disease: A Population Based Study
Conclusion:The findings from our study indicate that SCD patients have a high cumulative incidence of bleeding. While the increased incidence of intracranial, urological, and retinal bleeding has been previously described and are confirmed here, we present the novel finding that SCD patients also have a high incidence of GI bleeding, the majority of which are from an upper GI source. The association of hemorrhagic stroke with a history of ischemic stroke is also confirmed. The association of bleeding with VTE is likely due, at least in part, to anticoagulation. Further studies on the causes and risk factors for GI bleeding...
Source: Blood - November 21, 2018 Category: Hematology Authors: Hariharan, N., Brunson, A. M., Keegan, T. H. M., Wun, T. Tags: 114. Hemoglobinopathies, Excluding Thalassemia-Clinical: Organ Damage and Clinical Complications in Sickle Cell Disease Source Type: research
Reduced Cerebral Metabolic Rate of Oxygen in Adults with Sickle Cell Disease
Conclusion:We observed reduced CMRO2 in patients with SCD compared to healthy controls due to low OEF. A reduced CMRO2 could pose a risk for ischemia, despite high flow rate delivering oxygen, because of low OEF. This is supported by the fact that the silent cerebral infarcts are located in regions with the lowest CMRO2. We postulate that patients with SCD have a reduced capacity to increase the OEF in regions with inadequate CBF resulting in local ischemia and local infarction. The pathogenesis of the reduced OEF remains unclear but could be related to arteriovenous shunting whereby there is insufficient time for oxygen t...
Source: Blood - November 21, 2018 Category: Hematology Authors: Vaclavu, L., Petersen, E. T., VanBavel, E. T., Majoie, C. B., Nederveen, A. J., Biemond, B. J. Tags: 114. Hemoglobinopathies, Excluding Thalassemia-Clinical: Organ Damage and Clinical Complications in Sickle Cell Disease Source Type: research
Low Hemoglobin Increases Risk for Stroke, Kidney Disease, Elevated Estimated Pulmonary Artery Systolic Pressure, and Premature Death in Sickle Cell Disease: A Systematic Literature Review and Meta-Analysis
Conclusions: In conclusion, comprehensive evaluation of peer-reviewed literature published over the past 20 years demonstrates a significant relationship between chronic anemia and worse clinical outcomes in individuals with SCD. Meta-analyses further demonstrate that even relatively modest differences in hemoglobin are important and support hemoglobin increase by ≥1 g/dL as a relevant therapeutic target. These results suggest that interventions that reduce hemolytic anemia may confer clinical benefit in this patient population.DisclosuresAtaga: Novartis: Consultancy, Honoraria; Bioverativ: Honoraria, Membership on an e...
Source: Blood - November 21, 2018 Category: Hematology Authors: Ataga, K. I., Gordeuk, V. R., Allen, I. E., Colby, J., Gittings, K., Agodoa, I. Tags: 114. Hemoglobinopathies, Excluding Thalassemia-Clinical: Organ Damage and Clinical Complications in Sickle Cell Disease Source Type: research
Determination of the Structural Changes Accompanying Binding of Protein S to Factor IXa
Conclusion: Based on our preliminary data, we conclude that PS binds strongly with FIXa, and the complex is stabilized by a shift in α-helical content as shown in Figure 1.Figure.1 shows the CD spectral change of PS (curve 1, right panel) due to addition of different concentration of FIXa (curve 2-8, right panel).DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Chatterjee, S., Guidry, J. J., Plautz, W. E., Watt, T., Majumder, R. Tags: 321. Blood Coagulation and Fibrinolytic Factors: Structural Biology of Coagulation Proteins Source Type: research
High Molecular Weight Kininogen Contributes to End-Organ Damage and Mortality in a Mouse Model of Sickle Cell Disease
Conclusions: These data indicate that HK deficiency attenuates chronic inflammation, kidney failure, and heart hypertrophy, and improves survival of sickle cell mice.DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Sparkenbaugh, E., Wilson, K., Kasztan, M., Pollock, D. M., McCrae, K. R., Pawlinski, R. Tags: 113. Hemoglobinopathies, Excluding Thalassemia-Basic and Translational Science: Sickle Cell Disease-Role of Coagulation and Inflammation in Pathophysiology Source Type: research
