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Deletion of the neuropeptide Y (NPY) Y1 receptor gene reveals a regulatory role...

The contribution of neuropeptide Y (NPY), deriving from adrenal medulla, to the adrenosympathetic tone is unknown. We found that in response to NPY, primary cultures of mouse adrenal chromaffin cells secreted catecholamine, and that this effect was abolished in cultures from NPY Y(1) receptor knockout mice (Y(1)-/-). Compared with wild-type mice (Y(1)+/+), the adrenal content and constitutive release of catecho...