Localisation of neuropeptide Y in nerves of the rat cardiovascular system and the effect of 6-hydroxydopamine.

Abstract:

:The distribution of neuropeptide Y (NPY) in the rat cardiovascular system has been examined by radioimmunoassay, chromatographic analysis of tissue extracts, and immunocytochemistry. High concentrations of NPY were identified throughout the heart and within the major blood vessels of the rat in particular in the renal and superior mesenteric arteries. NPY-immunoreactivity was localised to dense plexuses of nerves in the adventitia of the arteries. Treatment of rats with 6-hydroxydopamine resulted in a significant reduction of NPY concentrations in the major vessels. A depletion of extractable NPY was also seen in the heart of the treated animals. Only few degenerated NPY-containing nerve fibres (swollen and fragmented) were observed in the heart and in the adventitia of the blood vessels. It is concluded that NPY containing nerves of the heart and blood vessels are sensitive to treatment with 6-hydroxydopamine. The pharmacological properties of this peptide suggest that these NPY-containing nerve fibres may act as efferent vasoconstrictor nerves to the blood vessels.

journal_name

Cardiovasc Res

journal_title

Cardiovascular research

authors

Allen JM,Polak JM,Rodrigo J,Darcy K,Bloom SR

doi

10.1093/cvr/19.9.570

subject

Has Abstract

pub_date

1985-09-01 00:00:00

pages

570-7

issue

9

eissn

0008-6363

issn

1755-3245

journal_volume

19

pub_type

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