Abstract:
:The mechanism through which the protein kinase Akt (also called PKB), protects the heart against acute ischaemia-reperfusion injury (IRI) is not clear. Here, we investigate whether Akt mediates its cardioprotective effect by modulating mitochondrial morphology. Transfection of HL-1 cardiac cells with constitutively active Akt (caAkt) changed mitochondrial morphology as evidenced by an increase in the proportion of cells displaying predominantly elongated mitochondria (73 ± 5.0 % caAkt vs 49 ± 5.8 % control: N=80 cells/group; p< 0.05). This effect was associated with delayed time taken to induce mitochondrial permeability transition pore (MPTP) opening (by 2.4 ± 0.5 fold; N=80 cells/group: p< 0.05); and reduced cell death following simulated IRI (32.8 ± 1.2 % caAkt vs 63.8 ± 5.6 % control: N=320 cells/group: p< 0.05). Similar effects on mitochondrial morphology, MPTP opening, and cell survival post-IRI, were demonstrated with pharmacological activation of Akt using the known cardioprotective cytokine, erythropoietin (EPO). The effect of Akt on inducing mitochondrial elongation was found to be dependent on the mitochondrial fusion protein, Mitofusin-1 (Mfn1), as ablation of Mfn1 in mouse embryonic fibroblasts (MEFs) abrogated Akt-mediated mitochondrial elongation. Finally, in vivo pre-treatment with EPO reduced myocardial infarct size (as a % of the area at risk) in adult mice subjected to IRI (26.2 ± 2.6 % with EPO vs 46.1 ± 6.5 % in control; N=7/group: p< 0.05), and reduced the proportion of cells displaying myofibrillar disarray and mitochondrial fragmentation observed by electron microscopy in adult murine hearts subjected to ischaemia from 5.8 ± 1.0 % to 2.2 ± 1.0 % (N=5 hearts/group; p< 0.05). In conclusion, we found that either genetic or pharmacological activation of Akt protected the heart against acute ischaemia-reperfusion injury by modulating mitochondrial morphology.
journal_name
Thromb Haemostjournal_title
Thrombosis and haemostasisauthors
Ong SB,Hall AR,Dongworth RK,Kalkhoran S,Pyakurel A,Scorrano L,Hausenloy DJdoi
10.1160/TH14-07-0592subject
Has Abstractpub_date
2015-03-01 00:00:00pages
513-21issue
3eissn
0340-6245issn
2567-689Xpii
14-07-0592journal_volume
113pub_type
杂志文章abstract::The in vitro effect of nifedipine, a calcium channel blocker of the dihydropyridine (DHP) type, on platelet aggregation was reinvestigated considering especially the capability of platelets to form endogenous nitric oxide (NO). We studied the dose-dependent antiaggregatory property of nifedipine in porcine platelet ri...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1994-08-01 00:00:00
abstract::In this study, we investigate the influence of three factor VII (FVII) gene polymorphisms on activated FVII levels (FVIIa), and also on the risk of myocardial infarction (MI) in patients with advanced coronary atherosclerotic disease (CAD). The -323A2 allele in the promoter is known to be associated with low FVII leve...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH04-02-0130
更新日期:2004-09-01 00:00:00
abstract::Long noncoding ribonucleic acids (lncRNAs) have been defined as transcripts which are > 200 ribonucleotides in size and are not translated into protein. Recent work has shown that many lncRNAs do have specific molecular functions and biological effects, and are involved in a growing number of diseases, including ather...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:10.1055/s-0039-1692680
更新日期:2019-08-01 00:00:00
abstract::Although there is considerable evidence that platelet activation is associated with polymerization of actin, it is not known whether there is some pre-existing F-actin even before activation. We have examined the state of actin polymerization in nonactivated platelets by deoxyribonuclease assay of G-actin and total ac...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1982-10-29 00:00:00
abstract::An important physiological anti-thrombotic function has been suggested for plasma fibronectin and the reticuloendothelial system. The current study evaluated the effects of specific immunological fibronectin depletion and fibronectin supplementation upon resistance to infusion of thrombin and ADP in terms of mortality...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1983-06-28 00:00:00
abstract::Today, direct oral anticoagulants (DOAC) are widely used alternatives to Vitamin-K antagonists (VKA). Women of reproductive age may become pregnant during anticoagulation and, while VKA carry an embryotoxic potential, the risk of DOAC embryopathy is unknown. As a result, some patients elect to terminate pregnancy for ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH16-04-0305
更新日期:2016-09-27 00:00:00
abstract::Platelet aggregation and adenine nucleotides in platelets have been studied in thirteen patients with myeloproliferative disorders. ADP induced aggregation was abnormal in two patients, but collagen induced aggregation was impaired in 11 patients. The concentrations of ATP and ADP in resting platelets in the patients ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1979-06-30 00:00:00
abstract::Thrombospondin, a trimeric glycoprotein contained in the platelet alpha-granules, has been proposed as a marker of in vivo platelet activation. However, it is also synthesised by a range of other cells. The extraplatelet contribution to plasma levels of thrombospondin was therefore estimated by investigating the relat...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1988-04-08 00:00:00
abstract::Human high molecular weight kininogen (HK), a single chain plasma glycoprotein, serves as a cofactor in the contact system of blood coagulation. After cleavage by human plasma kallikrein, the nonapeptide bradykinin is released. The HK light chain (LC) contains coagulant activity, which requires both the ability to bin...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1992-04-02 00:00:00
abstract::The German Priority Research Program "Angiogenesis" (www.angiogenese.de) hosts a biannual meeting in the Kloster Seeon in Southern Germany. The 2nd Kloster Seeon Meeting "Angiogenesis: Molecular Mechanisms and Functional Interactions" was held in September 2002. It included sessions on hypoxia, the biology of endothel...
journal_title:Thrombosis and haemostasis
pub_type:
doi:
更新日期:2003-01-01 00:00:00
abstract::Probands from 15 unrelated families with hereditary protein S deficiency type I, that is having a plasma total protein S concentration fifty percent of normal, were screened for abnormalities in their protein S genes by Southern analysis. Two probands were found to have a deviating DNA pattern with the restriction enz...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1989-11-24 00:00:00
abstract::Membrane-permeable 8-(4-chlorophenylthio)-2'-O-methyl cyclic AMP (8-pCPT-2'-O-Me-cAMP) has been shown to specifically activate cAMP-regulated Epac proteins, without direct effects on protein kinase A and protein kinase G. During isometric tension measurements in thoracic aortic rings from Wistar rats, we observed that...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH09-06-0341
更新日期:2010-03-01 00:00:00
abstract::Previous studies have shown an association between serum C-reactive protein (CRP) and cardiovascular disease (CVD) risk. The roles of interleukin-6 (IL-6) and tumor necrosis factor alpha (TNFalpha) are less well established. The aim of the present study was to analyze the associations of CRP, IL-6 and TNFalpha with in...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH05-08-0571
更新日期:2006-03-01 00:00:00
abstract::Magnesium (Mg) has shown the ability to inhibit arterial thrombus formation in some experimental animal studies. This effect may be due to an inhibition of platelet reactivity as in vitro studies have demonstrated that Mg inhibits platelet aggregation. In order to evaluate the in vivo effect of Mg in humans measuremen...
journal_title:Thrombosis and haemostasis
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1996-06-01 00:00:00
abstract:BACKGROUND:Platelet activation plays a major role in acute vessel closure after coronary angioplasty. In the randomized Balloon Angioplasty and Anticoagulation Study (BAAS), pretreatment with oral anticoagulants in addition to aspirin resulted in a 47% reduction of acute complications as compared with aspirin alone. Th...
journal_title:Thrombosis and haemostasis
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:2002-12-01 00:00:00
abstract::Factor VII is a vitamin K-dependent zymogen that plays a key role in the initiation of the extrinsic pathway. A severe factor VII deficiency was identified in a 45-year old male whose plasma factor VII antigen was less than 60 ng/ml and expressed 5.2% of normal factor VII activity. DNA sequence analysis of the patient...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2000-02-01 00:00:00
abstract::Complement C3 is a novel risk factor for cardiovascular disease (CVD), but the underlying mechanism is currently unknown. We determined the associations of the anaphylatoxin C3a, the activation product of C3, and of C3 itself with estimates of atherosclerosis and CVD. We studied associations of C3a and C3 with carotid...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH13-10-0831
更新日期:2014-06-01 00:00:00
abstract::A previous study of neurosurgical patients demonstrated an imbalance between thrombin and plasmin action following surgery. The present study was designed to determine the effect of intermittent pneumatic calf compression on postoperative enzyme activity. Fibrinopeptide A (FPA) and B beta 1-42 levels, reflecting throm...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1986-10-21 00:00:00
abstract::In a prospective study, coagulation test results were compared in 137 patients with colorectal cancer (CRC) and 39 subjects with benign colorectal diseases. Prothrombin fragment 1+2 (F1+2), thrombin-antithrombin complex (TAT), and soluble fibrin (SF) were measured in plasma before and after surgery. CRC patients prese...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2002-03-01 00:00:00
abstract::Samples taken at various stages of preparation of intermediate purity factor VIII concentrate were assayed for factor VIII coagulant activity (VIII:C), factor VIII coagulant antigen (VIIIC:Ag) and factor VIII related antigen (VIIIR:Ag). The antigen results were used to assess mechanical loss during fractionation as th...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1981-10-01 00:00:00
abstract::We have identified two novel minor deletions (case 1; -TA or -AT at nucleotide 9831-3 in exon 5 and case 2; -A at nucleotide 7640-1 in exon 4), one novel nonsense mutation (case 3; TAT to TAA at nucleotide 7491 in exon 4), and one recurrent nonsense mutation (case 4; CGA to TGA at nucleotide 5381 in exon 3A) in Japane...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1997-04-01 00:00:00
abstract::Fibrin polymerisation is mediated by interactions between knobs 'A' and 'B' exposed by thrombin cleavage, and holes 'a' and 'b'. We demonstrated markedly delayed thrombin-catalysed fibrin polymerisation, through B:b interactions alone, of recombinant γD364H -fibrinogen with impaired hole 'a'. To determine whether reco...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH12-09-0684
更新日期:2013-02-01 00:00:00
abstract::In patients with von Willebrand disease (VWD) replacement therapy with factor VIII/von Willebrand (VWF) concentrates is increasingly applied as prophylactic regimen. Since 2000, 82 consecutively enrolled patients with clinically relevant bleeding episodes (spontaneous, peri- or postoperative) were diagnosed with VWD [...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH10-09-0616
更新日期:2011-04-01 00:00:00
abstract::The Asian population is thought to have a low risk of venous thromboembolism (VTE), but the epidemiology of VTE in cancer patients remains unclear. The National Health Insurance Research Database of Taiwan was used to find hospitalised patients newly-diagnosed with cancer to determine the incidence of VTE in cancer pa...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH12-01-0010
更新日期:2012-08-01 00:00:00
abstract::The fibrin-specificity and procoagulant effects of recombinant staphylokinase (Sak42D) were compared with those of recombinant tissue-type plasminogen activator (rt-PA) in patients with acute myocardial infarction. Plasma samples were obtained at baseline and at 25 and 90 min, from 24 patients who were randomly assign...
journal_title:Thrombosis and haemostasis
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1996-12-01 00:00:00
abstract:BACKGROUND:Recombinant hirudin, a pure, specific antithrombin could be more effective than heparin in the treatment of deep vein thrombosis, but its short half-life requires constant intravenous infusion, whereas subcutaneous administration of recombinant hirudin can ensure stable and prolonged plasma levels. The aim o...
journal_title:Thrombosis and haemostasis
pub_type: 临床试验,杂志文章
doi:
更新日期:1994-05-01 00:00:00
abstract::Three single nucleotide polymorphisms (-603A/G, -1322C/T, -1812C/T) and one deletion/insertion polymorphism (-1208D/I) are present in the tissue factor (TF) gene promoter sequence. These polymorphisms are in complete linkage disequilibrium, determining two haplotypes with almost equal frequency. The -603A/-1208D/-1322...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH03-09-0566
更新日期:2004-02-01 00:00:00
abstract::Tissue factor pathway inhibitor (TFPI) is one of the main regulators of the tissue factor (TF) pathway of coagulation. To tether human TFPI to the cell surface, full length or truncated TFPI lacking the third Kunitz domain were fused with domains three and four and the carboxy-terminal sequence of human CD4. Construct...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1997-12-01 00:00:00
abstract::Elucidation of the molecular defects responsible for antithrombin III deficiency is proceeding rapidly. In order that a record is kept of the new and duplicated mutations that are found, we have compiled a database that we plan to update annually. In this, the first report of the database, we list 6 antithrombin III l...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1991-12-02 00:00:00
abstract::The 50 laboratories of the Netherlands Federation of Thrombosis Services, covering a population of 9 million and responsible for the laboratory control of approximately 150,000 patients under oral anticoagulation, have participated since 1974 in a voluntary external and internal quality control program. The external p...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1977-06-30 00:00:00