NPY modulates epinephrine-induced leukocytosis via Y-1 and Y-5 receptor activation in vivo: sympathetic co-transmission during leukocyte mobilization.

Abstract:

:Sympathetic nervous system (SNS) activation mobilizes blood leukocytes. Under these circumstances, both epinephrine (EPI) and neuropeptide Y (NPY) are released. Therefore, we investigated a possible interaction between these transmitters during leukocyte mobilization, using intravenous catheterization of male adult Lewis rats. Intravenous application of NPY followed by EPI, dose-dependently facilitated, intensified and inhibited EPI-induced leukocytosis with subset-specificity for NK-cells, monocytes, and B-lymphocytes. Pharmacological assessment of NPY receptors involved revealed a Y-1R-mediated inhibition and a Y-5R-mediated facilitation. RT-PCR on peripheral blood mononuclear cells (PBMC) detected Y-1R mRNA only, suggesting direct Y-1R-mediated effects on leukocytes and indirect effects via the Y-5R. Thus, via a specific Y-1R/Y-5R interplay, NPY acts as a neuroimmune co-transmitter in vivo.

journal_name

J Neuroimmunol

authors

Bedoui S,Lechner S,Gebhardt T,Nave H,Beck-Sickinger AG,Straub RH,Pabst R,von Hörsten S

doi

10.1016/s0165-5728(02)00278-3

subject

Has Abstract

pub_date

2002-11-01 00:00:00

pages

25-33

issue

1-2

eissn

0165-5728

issn

1872-8421

pii

S0165572802002783

journal_volume

132

pub_type

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