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U46619 is a stable synthetic analog of the endoperoxide prostaglandin PGH 2 first prepared in 1975, [1] and acts as a thromboxane A 2 (TP) receptor agonist. It potently stimulates TP receptor-mediated, but not other prostaglandin receptor-mediated responses in various in vitro preparations and exhibits many properties similar to thromboxane A 2, including shape change and aggregation of ...
Platelet transfusion is contraindicated in thrombotic thrombocytopenic purpura (TTP), as it fuels the coagulopathy. Platelet transfusion is generally ineffective, and thus contraindicated, for prophylaxis in immune thrombocytopenia (ITP), because the transfused platelets are immediately cleared; however, it is indicated to treat bleeding. [70]
Adenosine diphosphate (ADP) is a platelet agonist. When it is added to saline-diluted whole blood in the test cuvette, it stimulates the ADP receptors on platelets, activating the platelets. The activation of the platelets leads to shape change and degranulation, and the released content of the granules further activates the platelets.
The P2Y 12 receptor is involved in platelet aggregation and is thus a biological target for the treatment of thromboembolisms and other clotting disorders. Two transcript variants encoding the same isoform have been identified for this gene.
Thromboxane A 2 (TXA 2) is a type of thromboxane that is produced by activated platelets during hemostasis and has prothrombotic properties: it stimulates activation of new platelets as well as increases platelet aggregation.
The widely used drug aspirin acts by inhibiting the ability of the COX enzyme to synthesize the precursors of thromboxane within platelets. Low-dose, long-term aspirin use irreversibly blocks the formation of thromboxane A 2 in platelets, producing an inhibitory effect on platelet aggregation. This anticoagulant property makes aspirin useful ...
An agonist is a chemical that activates a receptor to produce a biological response. Receptors are cellular proteins whose activation causes the cell to modify what ...
IP receptor agonists, particularly when used intravenously, have been associated with the rapid development of pulmonary edema, hypotension, bleeding due to inhibition of platelet aggregation, and tachycardia. [17] [18] Clinical use of these agonists is
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