Abstract：
INTRODUCTION:Apoptotic cell death is a highly regulated genetic program, which has been observed in mature megakaryocytes fragmenting into platelets. The clock gene Per2, a key component of core clock oscillator, was involved in affecting both cell cycle control and apoptosis. Thus, loss of Per2 function may be considered potential influence of platelet formation and function. METHODS:Per2-null mice and C57BL/6 mice were used in the study. Bleeding time, platelet count, megakaryocyte count, megakaryocyte ploidy, megakaryocyte apoptosis, rate of proplatelet formation, clot retraction, platelet aggregation and secretion were performed to evaluate thrombopoiesis and hemostasis. Quantitative RT-PCR was employed to analyze genes expression in liver, bone marrow and enriched megakaryocytes. RESULTS:The Per2-null mice had nearly 50% platelet counts in peripheral blood. Per2-null platelets were compromised in their ability to aggregate and secretion, consistent with a marked reduction in the number of dense and a-granules. Megakaryocytes from Per2-null mice showed no significant variation in number but increased in ploidy. Ultrastructural examination of Per2-null megakaryocytes revealed many vacuoles in demarcation membranes and reduction in platelet granules. Megakaryocytes from Per2-null bone marrow decreased the rate of proplatelet formation and impaired apoptosis. Per2-null mice showed increased both in Tpo in livers and its receptors C-mpl in bone marrow, and the megakaryocytes from these mice decreased P53 expression, consequently increased Bcl-xl and Bcl-2 level. CONCLUSIONS:The clock gene Per2 modulating the apoptosis of megakaryocytes was required for platelet formation and function.
journal_name
Thromb Resjournal_title
Thrombosis researchauthors
Zhao Y,Zhang Y,Wang S,Hua Z,Zhang Jdoi
10.1016/j.thromres.2010.11.025subject
Has Abstractpub_date
2011-02-01 00:00:00pages
122-30issue
2eissn
0049-3848issn
1879-2472pii
S0049-3848(10)00650-Xjournal_volume
127pub_type
杂志文章abstract：:Heparinase degraded heparin fragments (HDHF) are enriched with a UV chromophore and can be utilized as calibrators to determine the molecular weight profile of low molecular weight heparins (LMWH's). In a standard protocol (1), the second to the last peak is assumed to be a hexasaccharide with a molecular weight of 1....
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(93)90222-a
更新日期：1993-04-01 00:00:00
abstract：:The perfusion technique to measure the relative adhesive and thrombogenic indices of vascular prostheses by a quantitative scanning electron microscopy has been described. To normalize the experiments with different samples of plasma we compared the adhesive and thrombogenic properties of the analyzed prostheses with ...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(83)90038-5
更新日期：1983-02-01 00:00:00
abstract：:This work was designed to investigate the influence of rat platelet adrenoceptors on the early thrombin-induced serotonin release. In washed platelets prelabeled with [3H]-serotonin, adrenaline and isoproterenol both inhibited, in a dose-dependent manner, the early thrombin-induced secretion of serotonin. Inhibitory r...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(85)90325-1
更新日期：1985-10-15 00:00:00
abstract：INTRODUCTION:Coagulation factor XIII (FXIII) is a fibrin-stabilizing factor, which contributes to hemostasis, wound healing, and maintenance of pregnancy. Accordingly, patients with congenital FXIII deficiency manifest a life-long bleeding tendency, abnormal wound healing and recurrent miscarriage. In order to understa...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2012.05.003
更新日期：2012-09-01 00:00:00
abstract：:Previous studies have indicated that the skin bleeding time test does not accurately reflect visceral bleeding time (BT). The present study examines the predictive value of the skin bleeding time for brain bleeding tendency. Sixteen Sprague-Dawley rats were divided into equal groups. The first group (controls) underwe...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(94)90282-8
更新日期：1994-12-15 00:00:00
abstract：BACKGROUND:The results of the EINSTEIN-DVT/PE and AMPLIFY trials, which compared rivaroxaban and apixaban with conventional anticoagulation therapy for acute venous thromboembolism (VTE), respectively, are often compared. However, the trials differed in duration of therapy (3-12 and 6months, respectively) and in patien...
journal_title：Thrombosis research
pub_type： 临床试验,杂志文章
doi：10.1016/j.thromres.2016.11.014
更新日期：2017-01-01 00:00:00
abstract：:Increased fibrinolytic activity is a well recognized constant finding observed during cardiopulmonary bypass (CPB). The purpose of the present work was to study and estimate the factors involved in the plasminogen activation and prekallikrein-kallikrein systems in a population of adult patients undergoing open heart s...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(92)90018-6
更新日期：1992-09-01 00:00:00
abstract：:The role of protein kinase C (PKC) in platelet activation by thrombin was assessed using a PKC inhibitor Ro 31-7549/001 (R2) which, in vitro, shows more selectivity for PKC than other kinase inhibitors. During early (1.5 s) thrombin-induced platelet activation, when phosphorylation of 47 kDa protein (pleckstrin) and m...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(93)90008-c
更新日期：1993-01-01 00:00:00
abstract：:Use of low molecular weight heparins (LMWHs) is now generally accepted as an ideal method of prophylaxis against postoperative venous thromboembolism. However, the long-term effects on the development of postthrombotic deep vein insufficiency are not known. Every patient developing such complications consumes a vast a...
journal_title：Thrombosis research
pub_type： 杂志文章,评审
doi：10.1016/0049-3848(95)00232-4
更新日期：1996-01-01 00:00:00
abstract：:D-dimer of human fibrin was used as antigen to obtain monoclonal antibodies (mAbs). We have obtained 16 hybridomas producing mAbs of different specificity. Only two of these mAbs inhibited fibrin polymerization. They are of the IgG-class. One mAb (II-4d) inhibited fibrin polymerization to 100% and another (II-3b) to 6...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2004.03.005
更新日期：2004-01-01 00:00:00
abstract：:The release of arachidonic acid, and its subsequent conversion to thromboxane A2, is an important component of platelet activation. The precise mechanism of arachidonic acid release is unknown although cytosolic phospholipase A2 (cPLA2) has been implicated. In the present study the effects of three agonists, the serin...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/s0049-3848(98)00097-8
更新日期：1998-10-01 00:00:00
abstract：:DMP 728 is a potent and specific platelet GPIIb/IIIa antagonist. Like all GPIIb/IIIa antagonists, DMP 728 has a steep dose-response relationship in inhibiting platelet aggregation. In this study the relationships between receptor occupancy, platelet aggregation and bleeding time was determined in anesthetized dogs aft...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(95)00029-1
更新日期：1995-03-15 00:00:00
abstract：:Rabbit platelets pretreated with CV-3988 had reduced responsiveness to platelet activating factor(PAF) even after the platelets had been washed with a buffer. This was due to its tight binding to receptor sites for PAF, but not conformational changes of the receptor, because the platelets that were pretreated with CV-...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(87)90215-5
更新日期：1987-04-01 00:00:00
abstract：:Thrombin-activatable fibrinolysis inhibitor (TAFI), also known as procarboxypeptidase U or plasma procarboxypeptidase B, is a relatively recently described plasma glycoprotein synthesised in the liver. It can be activated into active enzyme TAFIa (carboxypeptidase U or plasma carboxypeptidase B) by a complex of thromb...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/s0049-3848(02)00072-5
更新日期：2002-04-01 00:00:00
abstract：:Flavocetin-A is a strong platelet aggregation inhibitor isolated from the venom of Trimeresurus flavoviridis. It binds specifically to platelet glycoprotein Ib with high affinity and inhibits von Willebrand factor-dependent platelet aggregation. The apparent molecular weight of flavocetin-A is 149 kDa. It consists of ...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/s0049-3848(00)00234-6
更新日期：2000-08-01 00:00:00
abstract：UNLABELLED:We undertook a survey of French university hospital hematological laboratories to ascertain the clinical characteristics of patients with suspected HIT, the laboratory tests performed, and the therapeutic strategy adopted in current practice. METHODS:A standardized medical records database for patients with...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2010.02.003
更新日期：2010-06-01 00:00:00
abstract：INTRODUCTION:The activated partial thromboplastin time (APTT) is commonly used to monitor unfractionated heparin (UFH) but may not accurately measure the amount of heparin present. The anti-Xa assay is less susceptible to confounding factors and may be a better assay for this purpose. MATERIALS AND METHODS:The validit...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2017.07.006
更新日期：2017-09-01 00:00:00
abstract：:Liquid permeation studies of fibrin gels, which were formed in the presence of thrombin (Fibrin II) and in the presence of Batroxobin (Fibrin I), showed that those gels have distinctly different flow properties. For both gels the permeability coefficient (Ks) and average pore size varied depending on the conditions fo...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(82)90214-6
更新日期：1982-01-01 00:00:00
abstract：:Thrombin was acetylated by treatment with acetic anhydride, and the potency for protein C activation and the fibrinogen clotting activity of the resultant acetylthrombin were investigated in vitro and in vivo. The acetylthrombin retained an amidolytic activity to the synthetic substrate, S-2238, and reduced both of th...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(90)90053-f
更新日期：1990-08-15 00:00:00
abstract：:Acutely ill medical patients are at moderate to high risk of venous thromboembolism (VTE): approximately 10-30% of general medical patients may develop deep-vein thrombosis or pulmonary embolism, and the latter is a leading contributor to deaths in hospital. Medical conditions associated with a high risk of VTE includ...
journal_title：Thrombosis research
pub_type： 杂志文章,评审
doi：10.1016/S0049-3848(10)70008-6
更新日期：2010-04-01 00:00:00
abstract：:Experimental disseminated intravascular coagulation (DIC) can be induced by 4-h sustained infusion of endotoxin in a dose of 100 mg/kg in rats. The experimental model of DIC in rats was used to study the preventive effect of dipyridamole against DIC. Before the infusion of endotoxin, 0.5, 5.0 or 50.0 mg/kg of dipyrida...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(83)90216-5
更新日期：1983-03-15 00:00:00
abstract：INTRODUCTION:Diabetes mellitus is characterised by hyperglycaemia that plays an important role in the pathogenesis of diabetic complications including accumulation of methylglyoxal (MG), a highly reactive alpha-dicarbonyl metabolite of glucose degradation pathways and increased generation of advanced glycation end prod...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2007.03.002
更新日期：2007-01-01 00:00:00
abstract：:Von Willebrand disease (VWD) is classified into three primary subtypes; type 1 includes partial quantitative deficiency, type 2 (A, B, M and N) includes qualitative defects and type 3 includes virtually complete deficiency of von Willebrand factor (VWF). Type 2A includes variants with decreased platelet adhesion cause...
journal_title：Thrombosis research
pub_type： 杂志文章,评审
doi：10.1016/j.thromres.2007.03.014
更新日期：2007-01-01 00:00:00
abstract：BACKGROUND:The CHADS2 and CHA2DS2-VASc scores are well-established clinical scales to estimate the risk of stroke in patients with atrial fibrillation (AF). However, the predictive power of the two scales concerning left atrial thrombus (LAT) or spontaneous echo contrast (SEC) has not been well investigated. Therefore,...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2020.07.055
更新日期：2020-11-01 00:00:00
abstract：:Defibrotide (D) is a natural polydeoxyribonucleotide from mammalian lungs with profibrinolytic and antithrombotic activities. D also has PGI2-stimulating and tissue plasminogen activator (TPA)-releasing activities, but has no anticoagulant properties. The protective effects of D were demonstrated very recently in a mo...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(86)90265-3
更新日期：1986-05-01 00:00:00
abstract：:The present study was designed to find out whether the synthetic pentasaccharide SR 90107A/Org 31540, which is presently being evaluated in clinical trials as an antithrombotic agent, influences lipoprotein metabolism in rats as determined by plasma triglyceride (TG) lipase activity. A comparison with three clinically...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/s0049-3848(97)00075-3
更新日期：1997-05-15 00:00:00
abstract：INTRODUCTION:Patients with stable coronary artery disease (CAD) are at risk of arterial thrombosis causing myocardial infarction. Detection of global haemostatic markers of hypercoagulability and hypofibrinolysis may be important for risk stratification and individualised treatment. We examined overall haemostatic pote...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2013.03.015
更新日期：2013-05-01 00:00:00
abstract：:From kinetic analysis on the initial stage of the fibrinogen-fibrin conversion catalyzed by thrombin, inhibition constants, Kip, of heparin and heparin analogues were obtained by the turbidimetrical method. The inhibitory effect per unit amount in weight of heparin and heparin analogues increased generally with decrea...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/0049-3848(85)90235-x
更新日期：1985-09-01 00:00:00
abstract：INTRODUCTION:Anedoctal reports suggest that some thrombotic primary antiphospholipid antibody syndrome (PAPS) patients on oral anticoagulation require higher than average doses to achieve given targets international normalized ratios (INR). MATERIALS AND METHODS:To test the hypothesis of relative warfarin resistance i...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2011.01.014
更新日期：2011-06-01 00:00:00
abstract：INTRODUCTION:Type 2 diabetes mellitus (T2DM) patients have a variable response profile to the P2Y(12) receptor antagonist clopidogrel. P2Y(12) receptor signalling promotes platelet procoagulant activity. The aim of this study was to determine if T2DM patients with suboptimal clopidogrel response have greater platelet p...
journal_title：Thrombosis research
pub_type： 杂志文章
doi：10.1016/j.thromres.2008.10.001
更新日期：2009-07-01 00:00:00
