Key result
Combined stimulation of the endothelium with ATP and acetylcholine resulted in enhanced vasodilation compared with either agent combined with an endothelium-independent dilator in humans.
Why the study?
Does combined stimulation with ATP and acetylcholine enhance vasodilation and modulate α1-adrenergic vasoconstriction in humans compared to either agent combined with an endothelium-independent dilator?
Does combined stimulation with ATP and acetylcholine enhance vasodilation and modulate α1-adrenergic vasoconstriction in humans compared to either agent combined with an endothelium-independent dilator?
The vascular endothelium acts as a critical site for integrating vasomotor signals, with ATP and acetylcholine interacting to enhance vasodilation and modulate α1-adrenergic vasoconstriction in humans.
Hypothesis-generating for endothelial signaling; leaves open translation to clinical vascular outcomes.
The results of this study highlight the vascular endothelium as a critical site for integration of vasomotor signals in humans. For the first time, to our knowledge, we demonstrate that combined stimulation of the endothelium with ATP and ACh results in enhanced vasodilation compared with combination of either ATP or ACh with an endothelium-independent dilator. Furthermore, we show that ATP and ACh interact to modulate α 1 -adrenergic vasoconstriction in human skeletal muscle in vivo.
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Terwoord et al. (2021) studied this question. Combined stimulation with ATP and acetylcholine (ACh) vs. Combination of either ATP or ACh with an endothelium-independent dilator was evaluated on Vasodilation and modulation of α1-adrenergic vasoconstriction. Combined stimulation of the endothelium with ATP and acetylcholine resulted in enhanced vasodilation compared with either agent combined with an endothelium-independent dilator in humans.
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