Modulation of cholinergic neurotransmission in guinea‐pig trachea by neuropeptide Y

1 Neuropeptide Y (NPY) is localized to adrenergic nerves in guinea‐pig airways but its function is not known. 2 NPY (1 × 10−10‐3 × 10−7 m) had no direct effect on guinea‐pig tracheal smooth muscle in vitro. 3 NPY produced a concentration‐ and frequency‐dependent inhibition of the cholinergic compone...

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