Key result
High levels of collagen can activate platelets independently of TxA2 and ADP, but maximal aggregation requires TxA2 or secretion, whereas low levels strictly require TxA2 and ADP.
Population
Platelets in suspension (including those deficient in PLC gamma 2, G alpha q, or TxA2 receptors)
Design
Preclinical
Authors
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Does not support altering antiplatelet regimens; leaves open whether collagen pathways can be targeted independently of TxA2/ADP in humans.
High levels of collagen can induce platelet activation independently of traditional signaling pathways like TxA2, ADP, and PKC, whereas low levels require these pathways.
Cho et al. (2003) studied Platelet aggregation. Collagen was evaluated on Platelet activation and aggregation. High levels of collagen can activate platelets independently of TxA2 and ADP, but maximal aggregation requires TxA2 or secretion, whereas low levels strictly require TxA2 and ADP.
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