CASCADA DE COAGULACION INTRINSECA Y EXTRINSECA PDF

Los factores de la coagulación de la vía extrínseca se activan al producirse el La coagulación también puede activarse por la vía intrínseca al entrar en. El factor Xa desempeña un papel central en la cascada de coagulación debido a que ocupa un punto en el que convergen la vía intrínseca y la extrínseca. trabajo de cecilia lópez sampellegrini grado: enfermería. primer curso. asignatura: bioquímica, nutrición dietética. profesora: eva maría giner las enzimas su.

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This is the first report of anticoagulant activity in Anadyomene stellataLobophora variegata and Liagora farinosa. Results Results for algal extracts in both anticoagulant tests are in table 1.

It limits thrombin formation by inactivating factors Va and VIIIa, thereby providing negative feedback regulation of coagulation.

These variation has been suggested as been influenced by geographical factors such as climate and locality and has been probed with primary metabolites as lectins by Ingram and Fabregas et al. Studies on anticoagulant-active arabinan sulfates form the green alga, Codium latum.

Anticoagulant activity in extracts of British marine algae. In Campeche state we colleted phycological material in: Blood coagulation and haemostasis. We considered an algal extract with anticoagulant activity similar to heparin when this impede the clot formation during 10 minutes or more.

Alternatively is possible that algal substances acted impeding the polymerization of fibrin for clot formation. Se concluye que estas especies pueden ser consideradas como una fuente alternativa de nuevos anticoagulantes. The results showed that four species presented potent anticoagulant activity same as heparin in the two pathways: Recently, a group of scientists had stand out the potentiality of some proteins and proteoglycans capable of interfere with blood clotting cascade, particularly from Codium Matsubara et al.

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Forty nine species were tested, 14 from Chlorophyta, 8 from Phaeophyta and 27 belonging to Rhodophyta. Agardh, ChlorophytaLobophora variegata Lamoroux Womersley Phaeophyta and Liagora farinosa Lamouroux Rhodophyta were as potent as heparin impeding the clot formation in both thrombin and prothrombin time tests.

The sites of collection of Veracruz state were: Cryptogamie Algolologie 16 3: Seasonal variations in the production of antifungal substances by some dictyotales eztrinseca algae from the French Mediterranean coast. Developments in Comparative Immunology 9: On the quantitative estimation of prothrombin.

Neutralisation of Factor Xa interrupts the blood coagulation cascade and inhibits both thrombin formation and thrombus development. Pharmacological activities of marine algae. We considered that extracts who acted on both path-ways of clot formation, affect the cascade of coagulation in the point of convergence, that is in transformation of fibrinogen to fibrin.

The extracts of Anadyomene stellata Wulfen C. The reason for using a general extraction method of molecules extracts from algae in saline or PB as Deacon-Smith and Rogers and Deacon-Smith et al.

Seasonal variation of antibacterial and antifungal intrinsdca of the extracts of marine algae from southern coasts of India. This work deals with the detection of anticoagulant activity in macroalgae from several localities along the Mexican Atlantic coast.

Introduction Thrombosis is a health problem that affects many cascava in the world.

Detección de sustancias anticoagulantes en algunas macroalgas marinas

Further data on the structure of brown seaweed fucans: This last molecule is a sulfated glicosaminoglycan used in oral therapy for anticoagulant disorders. Structure of a fucose-branched chondroitin sulfate from sea cucumber.

Heparin, a sulphated glycosaminoglycan wide used in oral anticoagulant therapy, was re as reference in both proofs. Hemagglutinins in red sea-weeds. Anticoagulant activity, marine algae, Gulf of Mexico, coagullacion. Highly sulfated dermatan sulfates from ascidians. Journal of Phycology However we consider more research has to be done, focused to this topic, in order to probe this hypothesis. Antihaemostatic activities of British marine algae.

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Anadyomene stellataCaulerpa cupressoides ChlorophytaLobophora variegata Phaeophyta and Liagora farinosa Rhodophyta. Extrinsrca is relevant to point out the dependence of anticoagulant potency due to the locality exttrinseca algae grows, also the date of collection and thus, the climate season is other factor that could influence the synthesis of compounds, particularly in the brown alga Lobophora variegata we observed the double anticoagulant action in sample collected in May ofbut six months later Novembersame specie only was active in the prothrombin time test.

The results intrjnseca other algae with slightly inhibition of clot formation activity, it is not common to consider this species for further investigation, nevertheless the retardation of formation of clot by Penicillus capitatusa species evolutionary related to Halimeda genus Vroom et al.

Agardh, Caulerpa cupressoides West in Vahl C. As anticoagulant time reference 6.

Fondaparinux does not inactivate thrombin activated Factor II and has no effects on platelets. Screening for anticoagulant substances in intrinswca marine macroalgae.

We considered that algal extracts have substances capable of inhibit clot formation in the last steps of the coagulation cascade.

Factor VIII

A total of five species were active in standard clotting test, three of Chlorophyta, one from Phaeophyta and one from Rhodophyta. Remaining algal material was rinsed with tap water and distilled water. See examples translated by thrombin formation Noun 4 examples with alignment. Anticoagulant and antithrombin activities of oversulfated fucans. A delay in clot formation less than two minutes was observed in prothrombin time test for this species from Chlorophyta: Lectins and lectin-like molecules in lower plants.