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ClOpidogrel - bienvenue sur le site de l'amiform

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Action <strong>de</strong> l’aspirine: Aci<strong>de</strong><br />

Acétylsalicylique<br />

Production <strong>de</strong> thromboxane A2 par la cyclo-oxygénase (COX) plaquettaire = Vasoconstriction et<br />

activation plaquettaire.<br />

ADP Receptor (P2Y 12 )<br />

GP IIb/IIIa<br />

recepteur<br />

Fibrinogene<br />

COX<br />

ADP<br />

Activation<br />

ADP<br />

Collagene<br />

Thrombine<br />

TXA 2<br />

Vasoconstriction =<br />

- Réduction du flux<br />

sanguin donc du<br />

saignement.<br />

- Favorise l’adhésion<br />

<strong>de</strong>s plaquettes.<br />

Aspirine<br />

TXA 2<br />

L’aspirine induit une inhibition irréversib<strong>le</strong> <strong>de</strong> la cyclo-oxygénase <strong>de</strong> type 1. Au niveau<br />

<strong>de</strong>s plaquettes, cette inhibition bloque la synthèse <strong>de</strong> thromboxane A2 et inhibe ainsi une<br />

<strong>de</strong>s voies <strong>de</strong> l’agrégation plaquettaire.

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