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Source: Blood
Condition: Thrombocytopenia
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Total 18 results found since Jan 2013.
Stroke in a Pediatric Immune Thrombocytopenia Case
Conclusion: Stroke in the immune thrombocytopenic clinic is a rare but hard to manage condition. Although its mechanism not understand well, the clinician should be identify and manage it carefully.DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Leblebisatan, G., Cil, M., Sasmaz, H. I., Kilinc, Y., Soyupak, S. Tags: 311. Disorders of Platelet Number or Function Source Type: research
Phase 2 Study of Nilotinib 400 Mg Twice Daily in Newly Diagnosed Patients with Accelerated Phase of Chronic Myeloid Leukemia, Results after 5.7 Years of Follow-up
CONCLUSIONNilotinib is safe and highly effective in patients with AP-CML, and induces fast and durable responses. More than 50% of patients can achieve MR4.5. Clinical trial.gov: NCT00129740.DisclosuresCortes: novartis: Research Funding. O'Brien: Pfizer: Consultancy, Research Funding; Janssen: Consultancy; Aptose Biosciences Inc.: Consultancy; Kite Pharma: Research Funding; Regeneron: Research Funding; Vaniam Group LLC: Consultancy; Amgen: Consultancy; Pharmacyclics: Consultancy, Research Funding; Celgene: Consultancy; Alexion: Consultancy; Abbvie: Consultancy; GlaxoSmithKline: Consultancy; Acerta: Research Funding; Gilead...
Source: Blood - November 21, 2018 Category: Hematology Authors: Masarova, L., Cortes, J. E., Patel, K. P., O'Brien, S. M., Nogueras Gonzalez, G. M., Konopleva, M. Y., Verstovsek, S., Garcia-Manero, G., Ferrajoli, A., Kadia, T. M., Ravandi, F., Borthakur, G., Dellasala, S. E., Jabbour, E. J., Kantarjian, H. M. Tags: 632. Chronic Myeloid Leukemia: Therapy: Poster II Source Type: research
The role of ADAMTS13 testing in the diagnosis and management of thrombotic microangiopathies and thrombosis
ADAMTS13 (a disintegrin and metalloproteinase with thrombospondin type 1 motif, 13) is a metalloprotease responsible for cleavage of ultra-large von Willebrand factor (VWF) multimers. Severely deficient activity of the protease can trigger an acute episode of thrombotic thrombocytopenic purpura (TTP). Our understanding of the pathophysiology of TTP has allowed us to grasp the important role of ADAMTS13 in other thrombotic microangiopathies (TMAs) and thrombotic disorders, such as ischemic stroke and coronary artery disease. Through its action on VWF, ADAMTS13 can have prothrombotic and proinflammatory properties, not only ...
Source: Blood - August 30, 2018 Category: Hematology Authors: Masias, C., Cataland, S. R. Tags: Platelets and Thrombopoiesis, Thrombosis and Hemostasis, Review Articles, Clinical Trials and Observations Source Type: research
Double Blind Randomized Control Trial of Postoperative Low Molecular Weight Heparin Bridging Therapy for Patients Who Are at High Risk for Arterial Thromboembolism (PERIOP 2)
ConclusionsIn patients with atrial fibrillation and/or mechanical heart valves who had warfarin interrupted for a procedure there was no benefit from post-procedure LMWH bridging.DisclosuresKovacs: Bayer: Research Funding; Daiichi Sankyo Pharma Development: Research Funding. Wells: Janssen: Honoraria; Sanofi: Honoraria; BMS: Honoraria, Research Funding; Bayer: Honoraria. Schulman: Boehringer-Ingelheim: Honoraria, Research Funding; Daiichi-Sankyo: Honoraria; Sanofi: Honoraria; Bayer: Honoraria.
Source: Blood - November 21, 2018 Category: Hematology Authors: Kovacs, M. J., Rodger, M., Wells, P. S., Bates, S. M., Kearon, C., Blostein, M., Lazo-Langner, A., Kahn, S., Schulman, S., Sabri, E., Solymoss, S., Ramsay, T., Pallaveshi, L., Anderson, D. Tags: 332. Antithrombotic Therapy: Management of Challenging Patients and Scenarios Source Type: research
Variable Clinical Presentation of Congenital Thrombotic Thrombocytopenic Purpura in a Large Cohort of Patients Carrying a New Mutation in the CUB1 Domain of ADAMTS13 Gene
Conclusion:To the best of our knowledge, this is one of the largest congenital TTP cohorts described in the literature. This cohort is unique due to the fact that all members carry the same, previously unreported, ADAMTS13 gene mutation in the CUB1 domain of the gene. Our findings support an assumption that environmental and hereditary modifiers may influence disease course. Further research of the involved families may enable us to expand the understanding of the pathophysiology and develop better treatment options for this understudied rare condition.DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Pikovsky, O., Arafat, M., Ovadia, H., Sharoni, Y., Al-Athamen, K., Kanengisser-Pines, B., Keren-Politansky, A., Levi, I., Parvari, R., Rabinovich, A. Tags: 311. Disorders of Platelet Number or Function: Poster I Source Type: research
Efficacy and Safety of Pomalidomide in Combination with Prednisone in Patients with Myelofibrosis and Anemia -- Final Results of a Prospective Phase 2 Study
CONCLUSION:Pomalidomide with prednisone is safe therapy with good anti-anemia activity in patients with MF. It could lead to transfusion independence in one third of patients for a median duration of about 30 months. ClinicalTrials.gov Identifier: NCT00946270.Table 1.DisclosuresDaver: Alexion: Consultancy; ImmunoGen: Consultancy; Pfizer: Research Funding; Karyopharm: Research Funding; Otsuka: Consultancy; Novartis: Consultancy; ARIAD: Research Funding; Incyte: Consultancy; Pfizer: Consultancy; BMS: Research Funding; Sunesis: Research Funding; Daiichi-Sankyo: Research Funding; Sunesis: Consultancy; Kiromic: Research Funding...
Source: Blood - November 21, 2018 Category: Hematology Authors: Masarova, L., Daver, N. G., Kadia, T. M., Pemmaraju, N., Jabbour, E. J., Zhou, L., Pierce, S. A., Cortes, J. E., Kantarjian, H. M., Verstovsek, S. Tags: 634. Myeloproliferative Syndromes: Clinical: Poster I 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
Only severe thrombocytopenia results in bleeding and defective thrombus formation in mice
Platelets are essential mediators of hemostasis and thrombosis. Platelet counts (PCs) in humans average 250 platelets/nL, but it is not entirely clear how platelet numbers affect hemostasis and occurrence of thrombotic events. Mice, displaying PCs of ~1000 platelets/nL, are widely used to assess platelet function in (patho-)physiology, but also in this species, the significance of PC for hemostasis and thrombotic disease is not established. We reduced PCs in mice to defined ranges between 0 and 1000 platelets/nL by platelet-depleting antibodies and challenged them in different arterial thrombosis models: the transient midd...
Source: Blood - June 13, 2013 Category: Hematology Authors: Morowski, M., Vogtle, T., Kraft, P., Kleinschnitz, C., Stoll, G., Nieswandt, B. Tags: Thrombocytopenia, Platelets and Thrombopoiesis, Thrombosis and Hemostasis Source Type: research
Spontaneous heparin-induced thrombocytopenia syndrome: 2 new cases and a proposal for defining this disorder
We describe 2 new cases presenting with thrombotic stroke/thrombocytopenia: one following shoulder hemi-arthroplasty (performed without heparin) and the other presenting to the emergency room without prior hospitalization, heparin exposure, or preceding infection. Both patients tested strongly positive for anti-platelet factor 4 (PF4)/heparin immunoglobulin (Ig)G in 2 different immunoassays and in the platelet serotonin-release assay. Crucially, both patients’ sera also caused strong (>80%) serotonin release in the absence of heparin, a serologic feature characteristic of delayed-onset HIT (ie, where heparin use p...
Source: Blood - June 5, 2014 Category: Hematology Authors: Warkentin, T. E., Basciano, P. A., Knopman, J., Bernstein, R. A. Tags: Free Research Articles, Platelets and Thrombopoiesis, Thrombosis and Hemostasis, Brief Reports Source Type: research
Platelet 12-LOX is essential for Fc{gamma}RIIa-mediated platelet activation
In this study, we show for the first time that platelet 12(S)-lipoxygenase (12-LOX), a highly expressed oxylipin-producing enzyme in the human platelet, is an essential component of FcRIIa-mediated thrombosis. Pharmacologic inhibition of 12-LOX in human platelets resulted in significant attenuation of FcRIIa-mediated aggregation. Platelet 12-LOX was shown to be essential for FcRIIa-induced phospholipase C2 activity leading to activation of calcium mobilization, Rap1 and protein kinase C activation, and subsequent activation of the integrin αIIbβ3. Additionally, platelets from transgenic mice expressing human FcR...
Source: Blood - October 2, 2014 Category: Hematology Authors: Yeung, J., Tourdot, B. E., Fernandez-Perez, P., Vesci, J., Ren, J., Smyrniotis, C. J., Luci, D. K., Jadhav, A., Simeonov, A., Maloney, D. J., Holman, T. R., McKenzie, S. E., Holinstat, M. Tags: Platelets and Thrombopoiesis, Thrombosis and Hemostasis Source Type: research
Platelet transfusions in platelet consumptive disorders are associated with arterial thrombosis and in-hospital mortality
This study utilized the Nationwide Inpatient Sample to evaluate the current in-hospital platelet transfusion practices and their association with arterial/venous thrombosis, acute myocardial infarction (AMI), stroke, and in-hospital mortality over 5 years (2007-2011). Age and gender-adjusted odds ratios (adjOR) associated with platelet transfusions were calculated. There were 10 624 hospitalizations with TTP; 6332 with HIT and 79 980 with ITP. Platelet transfusions were reported in 10.1% TTP, 7.1% HIT, and 25.8% ITP admissions. Platelet transfusions in TTP were associated with higher odds of arterial thrombosis (adjOR = 5....
Source: Blood - February 26, 2015 Category: Hematology Authors: Goel, R., Ness, P. M., Takemoto, C. M., Krishnamurti, L., King, K. E., Tobian, A. A. R. Tags: Thrombocytopenia, Transfusion Medicine, Free Research Articles, Platelets and Thrombopoiesis, Clinical Trials and Observations Source Type: research
Targeted downregulation of platelet CLEC-2 occurs through Syk-independent internalization
Platelet aggregation at sites of vascular injury is not only essential for hemostasis, but may also cause acute ischemic disease states such as myocardial infarction or stroke. The hemi-immunoreceptor tyrosine-based activation motif–containing C-type lectinlike receptor 2 (CLEC-2) mediates powerful platelet activation through a Src- and spleen tyrosine kinase (Syk)–dependent tyrosine phosphorylation cascade. Thereby, CLEC-2 not only contributes to thrombus formation and stabilization but also plays a central role in blood-lymphatic vessel development, tumor metastasis, and prevention of inflammatory bleeding, m...
Source: Blood - June 25, 2015 Category: Hematology Authors: Lorenz, V., Stegner, D., Stritt, S., Vogtle, T., Kiefer, F., Witke, W., Schymeinsky, J., Watson, S. P., Walzog, B., Nieswandt, B. Tags: Thrombocytopenia, Platelets and Thrombopoiesis THROMBOSIS AND HEMOSTASIS Source Type: research
Risk Factors and Manageability of the Mainly Mild Mucocutaneous Bleeding Profile Observed in Attp Patients Treated with Caplacizumab during the Phase III Hercules Study
Conclusions: The safety profile of caplacizumab was favorable. In line with its pharmacology, treatment with caplacizumab was associated with an increased risk of mucocutaneous bleeding. These events were generally mild to moderate, and the majority did not require therapeutic intervention. While the number of patients receiving DOACs was low, no increased risk for bleeding with antithrombotic therapy was observed.DisclosuresCataland: Alexion: Research Funding; Shire: Consultancy; Ablynx: Consultancy, Other: Member of Advisory Board. Scully: Novartis: Honoraria, Other: Member of Advisory Board, Speakers Bureau. Peyvandi: N...
Source: Blood - November 21, 2018 Category: Hematology Authors: Cataland, S. R., Scully, M., Peyvandi, F., Coppo, P., Knobl, P., Kremer Hovinga, J. A., Metjian, A., De La Rubia, J., Pavenski, K., Minkue, J., Sousa, R. P., Callewaert, F., De Winter, H. Tags: 311. Disorders of Platelet Number or Function: Poster I Source Type: research
Safety and Efficacy of Venetoclax (VEN) in Combination with Bendamustine (B) Plus Rituximab (R) or Obinutuzumab (G) in Patients (pts) with Previously Untreated Chronic Lymphocytic Leukemia (CLL): Results from a Phase Ib Study (GO28440)
ConclusionVEN 400mg daily combined with BR or BG in 1L CLL treatment was associated with toxicity leading to treatment interruptions and discontinuations; the most frequently reported toxicities were hematologic. However, despite dose modifications, all pts responded to treatment, independently of subgroups. 50% of pts achieved a CR/CRi; higher than previously reported with BG or BR alone (Brown et al. Blood 2015; Michallet et al. Haematologica 2018). Responses were durable and preliminary PFS data are encouraging. Response rates were similar, irrespective of whether pts received planned 6 or fewer cycles of B; the optimal...
Source: Blood - November 21, 2018 Category: Hematology Authors: Stilgenbauer, S., Morschhauser, F., Wendtner, C.-M., Cartron, G., Hallek, M., Eichhorst, B., Kozloff, M. F., Giever, T., Lozanski, G., Jiang, Y., Huang, H., Pignataro, D. S., Schary, W., Humphrey, K., Mobasher, M., Salles, G. Tags: 642. CLL: Therapy, excluding Transplantation: Poster I Source Type: research
Curativestategy (GEM-CESAR) for High-Risk Smoldering Myeloma (SMM): Carfilzomib, Lenalidomide and Dexamethasone (KRd) As Induction Followed By HDT-ASCT, Consolidation with Krd and Maintenance with Rd
Conclusions: Although longer follow-up is required, this "curative strategy for high risk SMM" continues being encouraging with an acceptable toxicity profile. The study has met its primary endpoint. The depth of response improved over the treatment: 63% of patients who completed induction and ASCT achieved ≥CR with a MRD-ve rate of 55%.DisclosuresMateos: Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Abbvie: Consultancy, Membership on an entity's Board of Directors or advisory committees; Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors ...
Source: Blood - November 21, 2018 Category: Hematology Authors: Mateos, M.-V., Martinez-Lopez, J., Rodriguez Otero, P., Ocio, E. M., Gonzalez, M. S., Oriol, A., Gutierrez, N. C., Paiva, B., Rios, R., Rosinol, L., Alvarez, M. A., Calasanz, M. J., Bargay, J., Gonzalez, A. P., Alegre, A., Escalante, F., Martinez, R., Pui Tags: 731. Clinical Autologous Transplantation: Results: Poster I Source Type: research
