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Total 36 results found since Jan 2013.

DL-3-n-butylphthalide inhibits platelet activation via inhibition of cPLA2-mediated TXA2 synthesis and phosphodiesterase.
In conclusion, NBP significantly inhibits human platelet activation via inhibition of cPLA2-mediated TXA2 synthesis and PDE, and may be effective as an antiplatelet drug to treat other arterial thrombotic diseases. PMID: 25734213 [PubMed - in process]
Source: Platelets - February 14, 2016 Category: Hematology Tags: Platelets Source Type: research

A Pharmacoeconomic Analysis of Phosphate Binders Cost-Effectiveness in the RISCAVID Study
Background: A pharmacoeconomic analysis of the RISCAVID database aimed at assessing the cost effectiveness of phosphate binders in preventing CV mortality and morbidity over 7 years was performed. Methods: Morbid or fatal events occurring in 750 chronic HD patients were recorded. Statistical analysis evaluated the distribution of variables and the effect of sevelamer on survival. A cost-effectiveness evaluation was performed using a probabilistic model based on a Markov chain. Results: Multivariate analysis showed that treatment with sevelamer was associated with a reduced stroke incidence by 52% (p = 0.04) and reduced lev...
Source: Blood Purification - March 3, 2015 Category: Hematology Source Type: research

Results of the STOP-Hypertension-2 Trial.
Authors: Hansson L Abstract The second Swedish Trial in Old patients with Hypertension (STOP-Hypertension-2) was conducted to compare the effects of 'newer( antihypertensive therapies (angiotensin converting enzyme [ACE] inhibitors and calcium antagonists) and established therapies (beta-blockers and diuretics) on cardiovascular mortality and morbidity in elderly hypertensive patients. A total of 6614 patients were randomized to receive conventional treatment, ACE inhibitors or calcium antagonists, and followed for a mean of 5 years. The primary endpoint was a combination of fatal stroke, fatal myocardial infarctio...
Source: Blood Pressure - April 23, 2017 Category: Hematology Tags: Blood Press Source Type: research

MC-002 exhibits positive effects against platelets aggregation and endothelial dysfunction through thromboxane A2 inhibition
In conclusion, MC-002 exerted antiplatelet aggregation effect through TXA2 inhibition and relieved inflammatory injury of endothelial cells through NF-κB signal pathway.
Source: Thrombosis Research - February 12, 2014 Category: Hematology Authors: Weirong Fang, Jie Wei, Dan Han, Xi Chen, Guangwei He, Qiang Wu, Shaoxing Chu, Yunman Li Tags: Platelets and cell biology 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

CK2{beta} regulates thrombopoiesis and Ca2+-triggered platelet activation in arterial thrombosis
Platelets, anucleated megakaryocyte (MK)-derived cells, play a major role in hemostasis and arterial thrombosis. Although protein kinase casein kinase 2 (CK2) is readily detected in MKs and platelets, the impact of CK2-dependent signaling on MK/platelet (patho-)physiology has remained elusive. The present study explored the impact of the CK2 regulatory β-subunit on platelet biogenesis and activation. MK/platelet-specific genetic deletion of CK2β (ck2β–/–) in mice resulted in a significant macrothrombocytopenia and an increased extramedullar megakaryopoiesis with an enhanced proportion of prematur...
Source: Blood - December 21, 2017 Category: Hematology Authors: Münzer, P., Walker-Allgaier, B., Geue, S., Langhauser, F., Geuss, E., Stegner, D., Aurbach, K., Semeniak, D., Chatterjee, M., Gonzalez Menendez, I., Märklin, M., Quintanilla-Martinez, L., Salih, H. R., Litchfield, D. W., Buchou, T., Kleins Tags: Platelets and Thrombopoiesis, Thrombosis and Hemostasis Source Type: research

Aggregation is impaired in starved platelets due to enhanced autophagy and cellular energy depletion.
Authors: Paul M, Hemshekhar M, Kemparaju K, Girish KS Abstract Platelet hyperactivity is the hallmark of thrombosis and hemostasis disorders including atherosclerosis, diabetes, stroke, arthritis, and cancer causing significant mortality and morbidity. Therefore, regulating platelet hyperactivity is an ever growing interest. Very recently, basal autophagic process has been demonstrated to be essential for normal functioning of platelets. However, autophagy can be elevated above basal level under conditions like starvation, and how platelets respond in these settings remains to be elucidative. Therefore, in this stu...
Source: Platelets - May 30, 2018 Category: Hematology Tags: Platelets Source Type: research

Gintonin modulates platelet function and inhibits thrombus formation via impaired glycoprotein VI signaling.
In this study, we explored the anti-platelet activity of gintonin (a recently discovered non-saponin fraction of ginseng) against agonist-induced platelet activation. In vitro effects of gintonin on agonist-induced human and rat platelet aggregation, granule secretion, integrin αIIbβ3 activation, and intracellular calcium ion ([Ca2+]i) mobilization were examined. Western blot analysis and immunoprecipitation techniques were used to estimate the expression of mitogen-activated protein kinases (MAPKs) and phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) and interaction of glycoprotein VI (GPVI) signaling pathway...
Source: Platelets - June 6, 2018 Category: Hematology Tags: Platelets Source Type: research

Platelet Signaling in Primary Haemostasis and Arterial Thrombus Formation: Part 1.
Abstract Platelets react immediately in response to traumatic vascular injury by adhesion, activation, aggregation and subsequent haemostatic plug formation. While this reaction pattern is essential for haemostasis, platelet responses can also cause occlusive thrombi in diseased arteries, leading to myocardial infarction or stroke. Initially, flowing platelets are captured from the circulation to vascular lesions. This step is mediated by glycoprotein (GP) Ib-IX-V interacting with immobilized von Willebrand factor (VWF) on exposed subendothelial components. Tethered platelets can now bind to collagen through GPVI ...
Source: Hamostaseologie - October 23, 2018 Category: Hematology Authors: Scharf RE Tags: Hamostaseologie 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

Regulatory Genetic Variation at the S100B Gene Associates with Vaso-Occlusive Manifestations in Sickle Cell Disease
In sickle cell disease (SCD) polymerization of hemoglobin S under deoxygenated conditions causes vaso-occlusion, which can manifest as acute pain crisis and progressive bone/organ damage. Molecular studies have attributed vaso-occlusion to elevated vascular adhesion and inflammatory responses, whereas the genetic regulation has only recently been assessed.Genomic DNA isolated from peripheral blood mononuclear cells (PBMCs) was hybridized to Illumina Human 610-Quad SNP array for the PUSH and Walk-PHaSST cohorts and to Affrymetrix SNP 6.0 array for the Howard SCD expression cohort. Single nucleotide polymorphisms (SNPs) for ...
Source: Blood - November 21, 2018 Category: Hematology Authors: Zhang, X., Zhang, W., Saraf, S. L., Nekhai, S., Gladwin, M. T., Machado, R., Gordeuk, V. R. Tags: 113. Hemoglobinopathies, Excluding Thalassemia-Basic and Translational Science: Poster I Source Type: research

An assay to measure levels of factor Xa inhibitors in blood and plasma.
CONCLUSION: The assay is ideal for rapidly and accurately measuring DOAC levels in plasma and blood, demonstrating its potential for point-of-care applications. This article is protected by copyright. All rights reserved. PMID: 30985986 [PubMed - as supplied by publisher]
Source: Thrombosis and Haemostasis - April 14, 2019 Category: Hematology Authors: Kim PY, Di Giuseppantonio LR, Wu C, Douketis JD, Gross PL Tags: J Thromb Haemost Source Type: research

Piezo1 initiates platelet hyperreactivity and accelerates thrombosis in hypertension
CONCLUSIONS: Our study explains the activation of mechanoreceptor Piezo1 under hypertension is the key to abnormal platelet activation and thrombosis while providing novel platelet intervention strategies to prevent thrombosis.PMID:34411418 | DOI:10.1111/jth.15504
Source: Thrombosis and Haemostasis - August 19, 2021 Category: Hematology Authors: Weiyu Zhao Zeliang Wei Guang Xin Yulong Li Jiyan Yuan Yue Ming Chengjie Ji Qiushi Sun Shiyi Li Xinchuan Chen Wei Fu Ye Zhu Hai Niu Wen Huang Source Type: research