Radioimmunoassay of neuropeptide Y (NPY) in biological fluids. Circulating NPY levels depend on renal function
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Updated: Oct 13, 2026

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Published on: August 7, 2014
1Department of Clinical Chemistry, University Hospital, Uppsala, Sweden.
Abstract:
A second antibody solid phase radioimmunoassay for measuring neuropeptide Y (NPY) in biological fluids is introduced. The sensitivity of the method allows also measurements of sub-normal levels of plasma/serum NPY, necessary for obtaining further information of possible biological actions of circulating NPY. Characteristics of the NPY assay procedure are presented together with clinical experiments forced upon a possible renal dependence for NPY. Our data show that NPY at least partly is eliminated by the kidneys. Whether the highly increased NPY levels in patients with renal failure also are involved in the hypertensive mechanisms in these patient groups has to be further evaluated.
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