Sympathetic nervous system-targeted neuropeptide Y overexpression in mice enhances neointimal formation in response to vascular injury.

Abstract:

:Sympathetic neurotransmitter neuropeptide Y (NPY) is associated with vascular remodelling, neointimal hyperplasia and atherosclerosis in experimental animal models and clinical studies. In order to study the role of sympathetic nerve-produced NPY in vascular diseases, transgenic mouse model overexpressing NPY in central and peripheral noradrenergic neurons under the dopamine-beta-hydroxylase (DBH) promoter was recently created (OE-NPY(DBH) mouse). This study aimed to examine the effect of NPY overexpression on arterial neointimal hyperplasia in an experimental model of vascular injury. Transgenic OE-NPY(DBH) mice and wildtype control mice of two different inbred strains (C57BL/6 and FVB/n) underwent a femoral artery surgery with a transluminar injury by a 0.38-mm guide wire insertion. Arteries were harvested 4 weeks from the surgery, and they were stained for basic morphology. Both strains of OE-NPY(DBH) mice, as compared with wildtype control mice, showed on average 50% greater formation of the neointima (P<0.01) and an increase in the medial area (P=0.05). The results suggest that moderately increased neuronal NPY causes the arteries to be more susceptible to femoral artery thickening after endothelial injury. The OE-NPY(DBH) mouse provides a novel tool to explore the role of NPY in the development of vascular disease related to metabolic disorders.

journal_name

Peptides

journal_title

Peptides

authors

Ruohonen ST,Abe K,Kero M,Toukola L,Ruohonen S,Röyttä M,Koulu M,Pesonen U,Zukowska Z,Savontaus E

doi

10.1016/j.peptides.2008.12.009

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

715-20

issue

4

eissn

0196-9781

issn

1873-5169

pii

S0196-9781(08)00503-2

journal_volume

30

pub_type

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