Effects of adrenaline on human blood platelets.
Journal: 1968/February - Journal of Physiology
ISSN: 0022-3751
PUBMED: 6065889
Abstract:
1. Adrenaline at concentrations too low to cause aggregation of human platelets potentiates the aggregation by adenosine diphosphate. Noradrenaline has the same effect but is less active than adrenaline; isopropylnoradrenaline is inactive or inhibitory.2. The potentiation of adenosine diphosphate by catecholamines is blocked by the adrenergic alpha-receptor antagonists phentolamine and dihydroergotamine but not by 2-halogenoethylamines or by adrenergic beta-receptor antagonists.3. Both the first and second phases of adenosine diphosphate aggregation are potentiated by catecholamines but the second phase more than the first.4. The release from the platelets of adenine nucleotides which is associated with the second phase of aggregation is also increased by adrenaline.
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J Physiol 193(2): 443-453

Effects of adrenaline on human blood platelets

Abstract

1. Adrenaline at concentrations too low to cause aggregation of human platelets potentiates the aggregation by adenosine diphosphate. Noradrenaline has the same effect but is less active than adrenaline; isopropylnoradrenaline is inactive or inhibitory.

2. The potentiation of adenosine diphosphate by catecholamines is blocked by the adrenergic α-receptor antagonists phentolamine and dihydroergotamine but not by 2-halogenoethylamines or by adrenergic β-receptor antagonists.

3. Both the first and second phases of adenosine diphosphate aggregation are potentiated by catecholamines but the second phase more than the first.

4. The release from the platelets of adenine nucleotides which is associated with the second phase of aggregation is also increased by adrenaline.

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Selected References

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Abstract
1. Adrenaline at concentrations too low to cause aggregation of human platelets potentiates the aggregation by adenosine diphosphate. Noradrenaline has the same effect but is less active than adrenaline; isopropylnoradrenaline is inactive or inhibitory.
2. The potentiation of adenosine diphosphate by catecholamines is blocked by the adrenergic α-receptor antagonists phentolamine and dihydroergotamine but not by 2-halogenoethylamines or by adrenergic β-receptor antagonists.
3. Both the first and second phases of adenosine diphosphate aggregation are potentiated by catecholamines but the second phase more than the first.
4. The release from the platelets of adenine nucleotides which is associated with the second phase of aggregation is also increased by adrenaline.
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