right thumb 360px alt Schematic diagram of the blood coagulation thrombin left and protein C right pathways. In the blood coagulation pathway, thrombin acts to convert factor XI to XIa, VIII to VIIIa V to Va, fibrinogen to fibrin. In addition, thrombin promotes platelet activation and aggregation via activation of protease activated receptors on the cell membrane of the platelet. Thrombin also ... V into Vi, and VIIIa into VIIIi. Finally APC activates PAR 1 and EPCR. Role of thrombin in the blood coagulation cascade Thrombin , also known as coagulation factor II F2 , is a trypsin like serine ... thrombin in the first step of the coagulation The coagulation cascade coagulation cascade which ultimately results in the stemming of blood loss. Thrombin in turn acts as a serine protease that converts ... BF01612263 ref Physiology Synthesis Thrombin is produced by the enzymatic cleavage of two sites ... of antithrombin activity has been measured to be around 1.1 units mL. Newborn levels of thrombin ... coagulation pathway, thrombin acts to convert factor XI to XIa, factor VIII VIII to VIIIa, factor ... of the fibrin clot. Thrombin Protein protein interaction interacts with thrombomodulin ... B, couples the coagulation and fibrinolytic cascades through the thrombin thrombomodulin ..., Owen WG title Macromolecular specificity determinants on thrombin for fibrinogen and thrombomodulin ... issn ref As part of its activity in the coagulation cascade, thrombin also promotes platelet activation .... Negative feedback Thrombin bound to thrombomodulin activates protein C , an inhibitor of the coagulation cascade. The activation of protein C is greatly enhanced following the binding of thrombin ... increase in its activity. Thrombin is also inactivated by antithrombin , a serpin serine protease inhibitor ... 1.2 to create the active enzyme thrombin, which has a molecular weight of 36,000 Da. Gene The Thrombin ... involving prothrombin have been described e.g., hypoprothrombinemia . Anti thrombin antibodies in autoimmune ... more details
essay like date July 2008 The Thrombin Time TT , is a blood test which measures the time it takes for a clot to form in the plasma from a blood sample in anticoagulant which had added an excess of thrombin, ref DorlandsDict nine 100009034 thrombin time ref . This test is repeated with pooled plasma from normal patients. The difference in time between the test and the normal indicates an abnormality in the conversion of fibrinogen a soluble protein to fibrin an insoluble protein. ref name pmid12507975 cite journal author Flanders MM, Crist R, Rodgers GM title Comparison of five thrombin time reagents journal Clin. Chem. volume 49 issue 1 pages 169 72 year 2003 month January pmid 12507975 doi 10.1373 49.1.169 url http www.clinchem.org cgi pmidlookup?view long&pmid 12507975 ref This test is also known as the Thrombin Clotting Time TCT . Thrombin time compares a patient s rate of clot formation to that of a sample of normal pooled plasma. Thrombin is added to the samples of plasma. If the plasma ... called reptilase is used instead of thrombin. Reptilase has a similar action to thrombin but unlike thrombin it is not inhibited by heparin. The thrombin time is used to diagnose bleeding disorders and to assess the effectiveness of fibrinolytic therapy. Reference values for thrombin time are 10 to 15 ... 15 and 20 seconds. Thrombin time can be prolonged by heparin, fibrin degradation products, factor ... assays, the Thrombin Clotting Time is one of the most procedurally simple. After liberating the plasma from the whole blood by centrifugation , bovine Thrombin is added to the sample of plasma. The clot ... the addition of the thrombin and the clot formation is recorded as the thrombin clotting time Specimen ... per 9 parts blood. Reference Interval The reference interval of the Thrombin Clotting time is generally ... RA, Bowie EJ title Inhibitor of the thrombin time in systemic amyloidosis a common coagulation abnormality ... lsg labsurvivalguide hem thrombin time.htm Myeloid blood tests Category Blood tests cs Trombinov ... more details
Unreferenced stub auto yes date December 2009 There are three known thrombin receptors termed PAR1 , PAR3 and PAR4 PAR for protease activated receptor . These receptors are members of the 7 transmembrane g protein coupled family of Receptor biochemistry receptor s, however, their method of activation is unique. Thrombin , a serine protease , binds to and cleaves the extracellular N terminal domain of the receptor. A tethered ligand biochemistry ligand corresponding to the new N terminus , SFLLRN, is then unmasked, binding to the second extracellular loop of the receptor and activating it. Transmembrane receptors G protein coupled receptors DEFAULTSORT Thrombin Receptor Category G protein coupled receptors Biochem stub ... more details
AutoAbBox Autoantigen Thrombin OneIsoform Yes OneIsoformSpecialName coagulation br factor II OneGene F2 OneOrgan Cardiovascular OneTissue serum OneCell blood platelets OneAlso serum protein inhibitor OneDisease lupus erythematosus Systemic lupus erythematosus OneIgClass OneIgGSubclass OneHLA1 OneHLA2 OneHLA3 OneAssociatedGene OneTCellRestr OneTrigger Anti thrombin antibodies are autoantibodies directed against thrombin that may constitute a fraction of lupus anticoagulant and are seen an increased levels in lupus erythematosus systemic lupus erythematosus . Image 2c93.png thumb 127px left crystal structure of thrombin . In mammals, there is normally occurring anti thrombin activity antithrombin III , which can be distinguished from autoimmune anti thrombin. Anti thrombin antibodies can react with both types of thrombin in the antithrombin thrombin complex. ref name pmid6787123 cite journal ... between thrombin and antithrombin III journal J. Immunol. volume 127 issue 1 pages 239 44 year 1981 pmid 6787123 doi ref Antibodies IgG against thrombin can strongly inhibit its activity. ref name ... 655 64 year 1982 pmid 7066212 doi 10.1111 j.1365 2141.1982.tb01966.x ref Inhibitory anti thrombin ... LR, Pepper DS, Prowse CV title Monoclonal antibodies directed against human alpha thrombin and the thrombin ... pmid 6523447 doi 10.1016 0049 3848 84 90296 2 ref Autoimmune anti thrombin was also found to inhibit the binding of antithrombin III to thrombin. ref name pmid4076847 cite journal author Barthels M, Heimburger N title Acquired thrombin inhibitor in a patient with liver cirrhosis journal Haemostasis ..., that despite autoimmune anti thrombinthrombin inhibitory activity, these antibodies correlate with thrombotic ... antibodies to thrombin, antibodies to vascular heparin sulfate appear to interfere with antithrombin thrombin interaction. ref name pmid8299226 cite journal author Shibata S, Sasaki T, Harpel P, Fillit ... with endothelial cells and inhibit the formation of thrombin antithrombin III complexes journal ... more details
Direct thrombin inhibitors DTIs are a class of medication that act as anticoagulant s delaying coagulation blood clotting by directly inhibiting the enzyme thrombin . Some are in clinical use, while others are undergoing clinical development. Several members of the class are expected to replace heparin and derivatives and warfarin in various clinical scenarios. Types There are two types of DTIs, dependent on their interaction with the thrombin molecule. Bivalent DTIs hirudin and analogs bind both to the active site and exosite 1, while univalent DTIs bind only to the active site. ref name DiNisio cite journal author Di Nisio M, Middeldorp S, B ller H title Direct thrombin inhibitors. journal N Engl J Med volume 353 issue 10 pages 1028 40 year 2005 pmid 16148288 doi 10.1056 NEJMra044440 ref Bivalent Hirudin and derivatives were originally discovered in Hirudo medicinalis Hirudin Bivalirudin transient inhibition is cleaved by thrombin Lepirudin Desirudin Univalent Univalent DTIs include Argatroban Melagatran and its prodrug ximelagatran Dabigatran Uses Bivalent DTIs enjoy limited use in circumstances where heparin would be indicated but cannot be used, such as the acute coronary syndrome unstable angina . As they are administered by injection intravenous , intramuscular or subcutaneous , they are less suitable for long term treatment. ref name DiNisio Argatroban as well as the hirudins are used for heparin induced thrombocytopenia , a rare but serious complication of heparin treatment that requires anticoagulation as it increases both arterial and venous thrombosis risk but not with the putative agent, heparin. ref name DiNisio Ximelagatran showed good efficacy compared with warfarin in several trials in prevention and treatment of deep vein thrombosis and as thromboprophylaxis in atrial fibrillation . ref name DiNisio Development was stopped by manufacturer AstraZeneca ... test. ref name DiNisio References references Antithrombotics Category Direct thrombin inhibitors ... more details
The dysfibrinogenemias are a group of autosomal dominant disorders of qualitatively abnormal fibrinogen s http emedicine.medscape.com article 199723 overview . There are various different fibrinogen abnormalities, each named after the place where it was discovered. Each dysfibrinogenemia is associated with slightly different effects on the thrombin time and on normal clotting. Some dysfibrinogenemias cause abnormal bleeding or even thrombosis , while others have no effect on either bleeding or thrombosis. Some examples are Amsterdam is a major defect, characterized by aggregation of fibrin monomer s, prolonged thrombin time, and an inhibitory effect on normal clotting but it is asymptomatic. Detroit is a major defect, there is fibrinopeptide release, the thrombin time is prolonged, there is an inhibitory effect on normal clotting and there is abnormal bleeding. Wiesbaden is a major efect, there is aggregation of fibrin monomers, the thrombin time is prolonged, there is an inhibitory effect on normal clotting and there is both bleeding and thrombosis. Category Blood disorders ... more details
Reptilase time RT is a blood test used to detect deficiency or abnormalities in fibrinogen , ref name pmid12162688 cite journal author Van Cott EM, Smith EY, Galanakis DK title Elevated fibrinogen in an acute phase reaction prolongs the reptilase time but typically not the thrombin time journal Am. J. Clin. Pathol. volume 118 issue 2 pages 263 8 year 2002 month August pmid 12162688 doi 10.1309 WUB3 72JT E50M EU8J url http ajcp.metapress.com openurl.asp?genre article&issn 0002 9173&volume 118&issue 2&spage 263 ref ref name pmid200301 cite journal author Johnson PJ, White Y, Woolf IL, Williams R title Reptilase time in cirrhosis and hepatocellular carcinoma journal Br Med J volume 2 issue 6091 pages 869 70 year 1977 month October pmid 200301 pmc 1631704 doi 10.1136 bmj.2.6091.869 a url ref especially in cases of heparin contamination. Reptilase , an enzyme found in the venom of Bothrops Bothrops snakes , has activity similar to thrombin . Unlike thrombin, reptilase is resistant to inhibition by antithrombin III . Thus, the reptilase time is not prolonged in blood samples containing heparin, hirudin , or direct thrombin inhibitor s, whereas the thrombin time will be prolonged in these samples. Reptilase also differs from thrombin by releasing fibrinopeptide A, but not fibrinopeptide B, in its cleavage of fibrin . Other causes of prolonged reptilase time include the presence of fibrin degradation products , which interfere with fibrin polymerization. References reflist Myeloid blood tests Category Blood tests med stub fr temps de reptilase ... more details
PBB geneid 2149 Proteinase activated receptor 1 PAR1 also known as the coagulation factor II thrombin receptor is a protein that in humans is encoded by the F2R gene . ref name pmid8395910 cite journal ... thrombin receptor gene localization to region q13 of chromosome 5 journal Blood volume 82 issue ... II thrombin receptor url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch ... journal author Coughlin SR, Vu TK, Hung DT, Wheaton VI title Characterization of a functional thrombin ... DC, Laurent GJ, Chambers RC title Role of thrombin and its major cellular receptor, protease activated ... year 2002 pmid 12023853 cite journal author Tellez C, Bar Eli M title Role and regulation of the thrombin ... DT, Wheaton VI, Coughlin SR title Molecular cloning of a functional thrombin receptor reveals a novel ... Josef E, et al. title Solid tumor cells express functional tethered ligand thrombin receptor. journal ... L, Ishii K, Coughlin SR, Kobilka BK title Intracellular targeting and trafficking of thrombin receptors ... KP, Ganesh V, et al. title Crystallographic structures of thrombin complexed with thrombin receptor ... and thrombin receptors in human platelets. journal Proc. Natl. Acad. Sci. U.S.A. volume 91 issue 2 pages ..., Church FC title Response of blood leukocytes to thrombin receptor peptides. journal J. Leukoc. Biol ..., Bahou WF title Genomic cloning and characterization of the human thrombin receptor gene. Structural ..., Horaist C, et al. title Cloning and identification of regulatory sequences of the human thrombin receptor ... jbc.271.42.26320 cite journal author Shapiro MJ, Trejo J, Zeng D, Coughlin SR title Role of the thrombin ... Ogino Y, Tanaka K, Shimizu N title Direct evidence for two distinct G proteins coupling with thrombin ... DF, Hoxie JA, et al. title Thrombin receptors on human platelets. Initial localization and subsequent ... M, et al. title Specific inhibition of thrombin induced cell activation by the neutrophil proteinases ... domain of the thrombin receptor. journal Blood volume 89 issue 6 pages 1944 53 year 1997 ... more details
Image Hirudin in complex with thrombin.png thumb 250px Structure of Hirudin in complex with Thrombin . ref PDB 4HTC ref Hirudin is a naturally occurring peptide in the salivary gland s of medicinal leech es such as Hirudo medicinalis that has a blood anticoagulant property. This is fundamental for the leeches alimentary habit of hematophagy , since it keeps the blood flowing after the initial phlebotomy performed by the worm on the host s skin. Structure In 1884, the British physiologist John Berry Haycraft discovered that the leech secreted a powerful anticoagulant, which he named hirudin, although it was not isolated until the 1950s, nor its structure fully determined until 1976. Full length, hirudin is made up of 65 amino acids. These amino acids are organised into a compact N terminal domain containing three disulfide bonds and a C terminal domain which is completely disordered, when the protein is protein complex un complexed in solution. ref cite journal author Folkers PJM, Clore ... Rydell TJ, Tulinsky A. et al. title Refined structure of the Hirudin Thrombin complex journal J ... into fibrin by the serine protease enzyme thrombin . ref cite journal author Fenton JW 2nd, Ofosu SA et al. title Thrombin and antithrombotics journal Semin Thromb Hemost year 1998 volume 24 pages 87 91 issue 2 pmid 9579630 doi 10.1055 s 2007 995828 ref Thrombin is produced from prothrombin ... linked by factor XIII to form a blood clot . The principal Enzyme inhibitor inhibitor of thrombin ... of thrombin . Hirudin is the most potent natural inhibitor of thrombin. Unlike antithrombin III , hirudin binds to and inhibits only the activity of thrombin forms with a specific activity on fibrinogen ... thrombin. It is difficult to extract large amounts of hirudin from natural sources, so a method for producing ... Revasc Iprivask . Several other direct thrombin inhibitor s are derived chemically from ... Direct thrombin inhibitors Category Peptides medicine stub de Hirudin es Hirudina fr Hirudine nl Hirudine ... more details
PBB geneid 2151 Protease activated receptor 3 PAR3 , previously known as Coagulation factor II thrombin receptor like 2 , is a protein encoded by the F2RL2 gene in humans . The PBB Summary template is automatically maintained by Protein Box Bot. See Template PBB Controls to Stop updates. PBB Summary section title summary text Coagulation factor II thrombin receptor like 2 F2RL2 is a member of the large family of G protein coupled receptor 7 transmembrane receptors that couple to guanosine nucleotide binding proteins. F2RL2 is also a member of the protease activated receptor family and activated by thrombin. F2RL2 is activated by proteolytic cleavage of its extracellular amino terminus. The new amino terminus functions as a tethered ligand and activates the receptor. F2RL2 is a cofactor for F2RL3 activation by thrombin. It mediates thrombin triggered phosphoinositide hydrolysis and is expressed in a variety of tissues. ref cite web title Entrez Gene F2RL2 coagulation factor II thrombin receptor ... 3 is a second thrombin receptor in humans. journal Nature volume 386 issue 6624 pages 502 6 year ... al. title A dual thrombin receptor system for platelet activation. journal Nature volume 394 issue 6694 .... title Protease activated receptors 1 and 4 mediate activation of human platelets by thrombin. journal ... 408153 cite journal author Hauck RW, Schulz C, Sch mig A, et al. title alpha Thrombin stimulates contraction ... Matsui M, Zheng YW, Sulciner DJ, et al. title PAR3 is a cofactor for PAR4 activation by thrombin. journal ... author O Brien PJ, Prevost N, Molino M, et al. title Thrombin responses in human endothelial cells. Contributions from receptors other than PAR1 include the transactivation of PAR2 by thrombin ... Sambrano GR, Weiss EJ, Zheng YW, et al. title Role of thrombin signalling in platelets in haemostasis ... of thrombin. journal Biochem. Biophys. Res. Commun. volume 305 issue 1 pages 166 8 year 2003 pmid ... Thrombin induced Ca2 mobilization in human gingival fibroblasts is mediated by protease activated ... more details
PBB geneid 9002 Protease activated receptor 4 PAR4 , previously known as Coagulation factor II thrombin receptor like 3 , is a protein encoded by the gene F2RL3 gene in humans. ref name entrez cite web title Entrez Gene F2RL3 coagulation factor II thrombin receptor like 3 url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 9002 accessdate ref The PBB Summary template is automatically maintained by Protein Box Bot. See Template PBB Controls to Stop updates. PBB Summary section title summary text Coagulation factor II thrombin receptor like 3 F2RL3 is a member of the large family of 7 transmembrane region receptors that couple to guanosine nucleotide binding proteins. F2RL3 is also a member of the protease activated receptor family. F2RL3 is activated by proteolytic cleavage of its extracellular amino terminus. The new amino terminus functions as a tethered ligand and activates the receptor. F2RL3 is activated by thrombin and trypsin. ref name entrez cite web title Entrez Gene F2RL3 coagulation factor II thrombin receptor like 3 url http www.ncbi.nlm.nih.gov ... pnas.95.12.6642 pmc 22580 cite journal author Kahn ML, Zheng YW, Huang W, et al. title A dual thrombin ... receptors 1 and 4 mediate activation of human platelets by thrombin. journal J. Clin. Invest ... mediator of thrombin stimulated platelet procoagulant activity. journal Proc. Natl. Acad. Sci ..., Sulciner DJ, et al. title PAR3 is a cofactor for PAR4 activation by thrombin. journal Nature volume ... cite journal author Covic L, Singh C, Smith H, Kuliopulos A title Role of the PAR4 thrombin receptor ... author Owen WG title PAR 3 is a low affinity substrate, high affinity effector of thrombin. journal ... S0006 291X 03 00732 0 cite journal author Adam F, Verbeuren TJ, Fauch re JL, et al. title Thrombin ... Wu CC, Hwang TL, Liao CH, et al. title The role of PAR4 in thrombin induced thromboxane production ... motif for thrombin recognition and cleavage. journal Biochem. J. volume 376 issue Pt 3 pages 733 ... more details
protein Name coagulation factor II receptor coagulation factor II thrombin receptor caption image width HGNCid 3537 Symbol F2R AltSymbols PAR1 EntrezGene 2149 OMIM 187930 RefSeq NM 001992 UniProt P25116 PDB ECnumber Chromosome 5 Arm q Band 13 LocusSupplementaryData protein Name F2RL1 coagulation factor II thrombin receptor like 1 caption image width HGNCid 3538 Symbol F2RL1 AltSymbols PAR2, GPR11 EntrezGene 2150 OMIM 600933 RefSeq NM 005242 UniProt P55085 PDB ECnumber Chromosome 5 Arm q Band 13 LocusSupplementaryData protein Name F2RL2 coagulation factor II thrombin receptor like 2 caption image width HGNCid 3539 Symbol F2RL2 AltSymbols PAR3 EntrezGene 2151 OMIM 601919 RefSeq NM 004101 UniProt O00254 PDB ECnumber Chromosome 5 Arm q Band 13 LocusSupplementaryData protein Name F2RL3 coagulation factor II thrombin receptor like 3 caption image width HGNCid 3540 Symbol F2RL3 AltSymbols PAR4 EntrezGene 9002 OMIM 602779 RefSeq NM 003950 UniProt Q96RI0 PDB ECnumber Chromosome 19 Arm p Band 12 LocusSupplementaryData Protease activated receptor s are a subfamily of related G protein coupled receptor s that are activated by cleavage of part of their extracellular domain. They are highly expressed in platelet s, but also on endothelial cells, myocytes and neurons. ref name Macfarlane 2001 cite journal author Macfarlane SR, Seatter MJ, Kanke T, Hunter GD, Plevin R title Proteinase activated receptors journal Pharmacol Rev volume 53 issue 2 pages 245 82 year 2001 doi pmid 11356985 url http pharmrev.aspetjournals.org cgi content abstract 53 2 245 format abstract ref Classification There are 4 ... the body. Activation PARs are activated by the action of serine protease s such as thrombin acts on PARs ... and Gq protein q calcium signalling to cause cellular actions. Function The cellular effects of thrombin are mediated by protease activated receptors PARs . Thrombin signalling in platelet s contributes ..., Rodr guez C, Gentile M, Calvayrac O, Badimon L title Thrombin and protease activated receptors PARs ... more details
DTI may refer to Debt to income ratio Deep trench isolation Defense Technology Institute Thai defense technology public organisation by the Ministry of Defence Thailand Thai Ministry of Defence Department of Trade and Industry disambiguation , Government department in several countries Detroit, Toledo and Ironton Railroad Dial test indicator Diffusion MRI Diffusion tensor imaging Diffusion tensor imaging Direct thrombin inhibitor Diversified Technology, Inc. Diesel Turbo Injection , on some older Opel models, predecessor of CDTi disambig de DTI fr DTI ko DTI ja DTI ... more details
by proteolysis at residue Arg92 by the thrombin thrombomodulin complex, CPB2 exhibits ... of two thrombin activatable fibrinolysis inhibitor isoforms journal Thromb. Haemost ... of the gene encoding human TAFI thrombin activable fibrinolysis inhibitor plasma procarboxypeptidase ... is activated by thrombin and acts on carboxypeptidase B substrates. After thrombin activation, the mature ... 2 PBB Further reading citations cite journal author Bouma BN, Mosnier LO title Thrombin activatable ... B, couples the coagulation and fibrinolytic cascades through the thrombin thrombomodulin complex. journal ... PF, Hackeng TM, Dawson PE, et al. title Inactivation of active thrombin activable fibrinolysis inhibitor ... journal author Mosnier LO, Meijers JC, Bouma BN title The role of protein S in the activation of thrombin ... MG, Bouma BN, Meijers JC title Protein C inhibitor regulates the thrombin thrombomodulin complex in the up ... residues in the P6 P 3 region of thrombin activable fibrinolysis inhibitor TAFI do not determine the thrombomodulin ... ME, et al. title Association of a single nucleotide polymorphism in CPB2 encoding the thrombin ... Y, Gabazza EC, Hori Y, et al. title Association between plasma thrombin activatable fibrinolysis inhibitor ... author Antovic JP, Blomb ck M title Thrombin activatable fibrinolysis inhibitor antigen and TAFI activity ... yes update summary no update citations no DEFAULTSORT Thrombin Activatable Fibrinolysis Inhibitor ... more details
Image Echis carinatus sal.jpg right thumb 240px Saw scaled viper, Echis carinatus . Ecarin clotting time ECT is a laboratory test used to monitor anticoagulation during treatment with hirudin , an anticoagulant medication which was originally isolated from leech saliva. Ecarin, the primary reagent in this assay, is derived from the venom of the saw scaled viper, Echis carinatus . In the clinical assay, a known quantity of ecarin is added to the plasma of a patient treated with hirudin. Ecarin activates prothrombin through a specific proteolytic cleavage, which produces meizothrombin, a prothrombin thrombin intermediate which retains the full molecular weight of prothrombin, but possesses a low level of procoagulant enzymatic activity. Crucially, this activity is inhibited by hirudin and other direct thrombin inhibitors, but not by heparin . The ECT is also unaffected by prior treatment with coumadin or the presence of phospholipid dependent anticoagulants, such as lupus anticoagulant . Thus, the ECT is prolonged in a specific and linear fashion with increasing concentrations of hirudin. ref cite journal author Nowak G title The ecarin clotting time, a universal method to quantify direct thrombin inhibitors journal Pathophysiol. Haemost. Thromb. volume 33 issue 4 pages 173 83 year 2003 pmid 15583446 doi 10.1159 000081505 ref ref name Fab01 Fabrizio MC. 2001. Use of Ecarin Clotting Time ECT with Lepirudin Therapy in Heparin Induced Thrombocytopenia and Cardiopulmonary Bypass. JECT 33 117 125. http www.amsect.org ce HIT ject 2001 v33 n2 fabrizio.pdf PDF at http www.amsect.org Journal of The American Society of ExtraCorporeal Technology . Accessed 5 June 2007. ref ref name TET http www.specialtylabs.com books display.asp?id 1060 Textarin Ecarin Time at http www.specialtylabs.com Specialty Laboratories . Accessed 5 June 2007. ref References reflist Category Hematology Category Blood tests med stub Myeloid blood tests ... more details
to thrombin. Like thrombin, these proteases are capable of inducing platelet aggregation, and some even fibrin clot formation, at nanomolar concentrations. Structural Comparison to Thrombin Cerastocytin ... 4th Ed. , W.H. Freeman and Company, New York 2005 . ref thrombin specifically, has three distinguishing ... and hydrolyze fibrinogen at the concentration of 5nM, closely mimics the activity of thrombin ... A and in the 3 D confirmation looks very similar to the analogous region of alpha thrombin. Despite ... Phe90 Val99 . The peptides that serve this purpose in thrombin Leu99, Ile174, Trp215 are known as the aryl ... surface of cerastocytin differs in its amino acid sequence from that of thrombin, however, the 3 ... 10618. ref Similarly in thrombin four Arg, one Lys, one His and two Glu occupy the same residue stretch ... in the platelet aggregating activity of thrombin, a similar function could be proposed for this structure ... S that is recognized as crucial for thrombin s ability to hydrolyze alpha and beta chains. Mutations within the S site have shown a decrease in the thrombin facilitated fibrinogenolysis. However .... Furthermore, its receptor binding site is not the same as that of thrombin. This is cinfirmed by the fact that cerastotin was still active after a thrombin desensitization test and was not affected by the competitive inhibitors of thrombin. ref name Marrakchi N. 1997 Marrakchi N., et al ... for thrombin and cerastocytin. Just as with thrombin, cerastocytin activated platelet aggregation ... to inhibit thrombin fascilitated platelet clot formation. This data suggests that cerastocytin ... to inhibit thrombin, interfered with cerastocytin activity, but not with cerastotin. This data reinforces ... more details
, but apparently, thrombomodulin has at least one other ligand biochemistry ligand apart from thrombin ... Thrombomodulin has been shown to Protein protein interaction interact with Thrombin . ref name ... and fibrinolytic cascades through the thrombin thrombomodulin complex journal J. Biol. Chem ... Macromolecular specificity determinants on thrombin for fibrinogen and thrombomodulin journal J. Biol ... cite journal author Jakubowski HV, Owen WG title Macromolecular specificity determinants on thrombin ... K, Kusumoto H, Deyashiki Y, et al. title Structure and expression of human thrombomodulin, a thrombin ..., a cofactor for thrombin catalyzed activation of protein C. journal J. Biochem. volume 103 issue ... author Srinivasan J, Hu S, Hrabal R, et al. title Thrombin bound structure of an EGF subdomain ... more details
Drugbox IUPAC name image CAS number 9039 61 6 ATC prefix B02 ATC suffix BX03 PubChem DrugBank chemical formula molecular weight bioavailability protein bound metabolism elimination half life excretion pregnancy AU A B1 B2 B3 C D X pregnancy US A B C D X pregnancy category legal AU S2, S3, S4, S5, S6, S7, S8, S9 or Unscheduled legal CA Schedule I, II, III, IV, V, VI, VII, VIII legal UK GSL, P, POM, CD, or Class A, B, C legal US OTC Rx only Schedule I, II, III, IV, V ref Batroxobin technical sheet ref legal status routes of administration Batroxobin is a serine protease ref name pmid7737180 cite journal author Lochnit G, Geyer R title Carbohydrate structure analysis of batroxobin, a thrombin like serine protease from Bothrops moojeni venom journal Eur. J. Biochem. volume 228 issue 3 pages 805 16 year 1995 month March pmid 7737180 doi 10.1111 j.1432 1033.1995.tb20326.x url http www3.interscience.wiley.com resolve openurl?genre article&sid nlm pubmed&issn 0014 2956&date 1995&volume 228&issue 3&spage 805 ref derived from the venom of Bothrops atrox . Its molecular weight is approximately 43,000 g mol sup 1 sup . This thrombin like proteolytic enzyme splits the 16 Arg 17 Gly bond in the A alpha chain of fibrinogen , releasing fibrinopeptide A and leading to the clot formation through aggregation of formed of fibrin I monomer or Des AA monomer. ref Technical sheet of Batroxobin from http www.pentapharm.com graphics pentapharm download diagnostics purified proteins from snake venoms Batroxobin.pdf PentaPharm ref . In contrast to other anti coagulants, it does not affect the functions of platelets. Hence, Batroxobin is used to determine fibrinogen in plasma, to measure a batroxobin clotting time as a heparin insensitive parallel to the thrombin time, to investigate dysfibrinogenemia, and to test the contractile system of platelets ref Application of snake venom proteins in the diagnosis of hemostatic disorders in Medical Use of Snake Venom Proteins, Stocker K, ed. Boca Raton ... more details
Unreferenced stub auto yes date December 2009 An exoenzyme , or extracellular enzyme , is an enzyme that is secreted by a cell biology cell and that works extracellular outside of that cell . It is usually used for breaking up large molecules that would not be able to enter the cell otherwise. This term is also often used to refer to the hydrolytic digestive enzymes secreted by fungi. Examples of extracellular enzymes Amylase Angiotensin converting enzyme ACE generation of angiotensin II Lipoprotein lipase release of lipids from circulating lipoproteins Digestive enzymes breakdown of ingested nutrients Some clotting factors e.g. thrombin See also Endoenzyme Category Enzymes Enzyme stub ar de Exoenzym fr Exoenzyme pl Egzoenzymy ... more details
Unreferenced date July 2007 Blood spinning is a method used by sportsperson athletes to shorten the time to Healing heal an injury . Small samples of the athlete s blood are spun in a centrifuge to increase the concentration of growth hormone s. Calcium and the enzyme thrombin are added, forming a gel that is high in natural growth hormones. The sample is then injected into the wound , which can then heal as much as five times faster. Using this procedure can fall foul of the World Anti Doping Agency WADA due to possible non natural elements introduced into the athlete s body. A notable case where this procedure was used is that of NFL player Hines Ward . Following this there have been calls to legalize the procedure as scientists argue that it does not improve performance, only recovery time. Category Blood Category Doping treatment stub ... more details
Orphan date February 2009 TachoSil is a collagen sponge coated with the human coagulation factors fibrinogen and thrombin . It is used during surgery to stop local bleeding on internal Organ anatomy organ s hemostasis . The sponge is manufactured from horse tendons. TachoSil reacts upon contact with blood, other body fluids or saline to form a clot that glues it to the tissue surface. Hemostasis is reached in a few minutes, and the sponge is absorbed by the body within several weeks. Some patients experience hypersensitivity or allergic reactions. In rare cases, it could turn into severe hypersensitive reaction. Those who are prone to having a systemic reaction to horse proteins or human blood products are not good candidates for use of TachoSil. External links http www.tachosil.com TachoSil website treatment stub Category Surgery ... more details
Orphan date February 2009 About enzymes and proteins Exosite disambiguation An exosite is a secondary binding site, remote from the active site, on an enzyme or other protein . ref http www.ingentaconnect.com content bsc jth 2007 00000005 00000010 art00013 IngentaConnect Manipulation of thrombin exosite I, by ligand directed covalent m Bot generated title ref This is similar to allosteric sites, but differs in the fact that, in order for an enzyme to be active, its exosite typically must be occupied. ref http www.blackwellpublishing.com isth2003 abstract.asp?id 9231 Congress of the International Society on Thrombosis and Haemostasis Bot generated title ref Exosites have recently become a hot topic in biomedical research as potential drug targets. References reflist External links http bloodjournal.hematologylibrary.org cgi reprint 84 6 1843.pdf Category Enzymes Category Catalysis biology stub ... more details
Fibrin glue also called fibrin sealant is a synthetic substance used to create a fibrin clot . ref name bmj http www.bmj.com cgi content extract 308 6934 933 ref ref http www.theannals.com cgi content abstract 22 12 946 ref ref http www.medhelp.org forums gastro archive 1054.html ref ref http content.karger.com ProdukteDB produkte.asp?Doi 8552 ref ref http www.healthsystem.virginia.edu internet stac research spfibgl.cfm ref ref name IJPS http www.ijps.org article.asp?issn 0970 0358 year 2003 volume 36 issue 1 spage 14 epage 17 aulast Saxena ref ref http www3.interscience.wiley.com journal 121466570 abstract ref It is made up of fibrinogen and thrombin ref name bmj that are injection medicine injected through one head into the site of a fibrin tear. ref name bmj Thrombin acts as an enzyme and converts the fibrogen into fibrin between 10 and 60 seconds and acts as a tissue adhesive . ref name IJPS ref cite pmid 19820991 ref It may also contain aprotinin , fibronectin and plasminogen . ref http www.fass.se LIF produktfakta artikel produkt.jsp?NplID 19950119000010&DocTypeID 5 Tisseel From the Swedish official drug catalog ref This glue can be used for repairing dura tears, bronchial fistula s and for achieving hemostasis after spleen and liver trauma. ref name IJPS It is also employed in no surgical suture sutures corneal transplantation . ref name pmid17379570 cite journal author Narendran N, Mohamed S, Shah S title No sutures corneal grafting a novel use of overlay sutures and fibrin glue in Deep Anterior Lamellar Keratoplasty journal Cont Lens Anterior Eye volume 30 issue 3 pages 207 9 year 2007 month July pmid 17379570 doi 10.1016 j.clae.2007.02.007 url http linkinghub.elsevier.com retrieve pii S1367 0484 07 00031 8 ref ref cite pmid 19668958 ref References reflist Category Blood Category Surgery Category Adhesives med stub de Fibrinkleber it Colla di fibrina Fibrin glue http www.intexmatrix.com baxter bio surgery.html ... more details
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