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Aspirin at therapeutic concentrations does not affect 5-hydroxytryptamine uptake by platelets
British Journal of Pharmacology
|April 1, 1977
Summary
Aspirin does not affect serotonin uptake or release in platelets. However, it does block platelet aggregation responses to collagen and arachidonic acid by inhibiting prostaglandin synthesis.
Area of Science:
- Pharmacology
- Biochemistry
- Hematology
Background:
- Aspirin is known to affect platelet function.
- Previous research suggested aspirin inhibits serotonin transport in platelets.
Purpose of the Study:
- To investigate the effect of aspirin on serotonin (5-hydroxytryptamine or 5-HT) uptake and release in blood platelets.
- To clarify aspirin's mechanism of action on platelet function.
Main Methods:
- Therapeutic concentrations of aspirin were used.
- Platelet uptake and release of 5-HT were measured.
- Platelet aggregation responses to collagen and arachidonic acid were assessed.
Main Results:
- Aspirin did not inhibit 5-HT uptake by platelets.
- Aspirin did not induce 5-HT release from platelets.
- Platelet aggregation responses to collagen and arachidonic acid were abolished, linked to prostaglandin synthesis inhibition.
Conclusions:
- Aspirin's effects on platelet function at therapeutic doses do not involve the inhibition of 5-HT transport.
- The findings contradict earlier claims regarding aspirin's impact on platelet serotonin transport.