当前位置： SCI文献检索 > NEUROPHARMACOLOGY期刊下所有文献 > Centrally administered hemokinin-1 (HK-1), a neurokinin NK1 receptor agonist, produces substance P-like behavioral effects in mice and gerbils.

Centrally administered hemokinin-1 (HK-1), a neurokinin NK1 receptor agonist, produces substance P-like behavioral effects in mice and gerbils.

Abstract：

:Hemokinin-1 (HK-1) is a recently described mouse tachykinin peptide whose biological functions are not fully understood. To date, a unique receptor for HK-1 has not been identified. Recent studies suggest HK-1 may have a role in immunological functions, but there has been little characterization of HK-1's effects in the central nervous system (CNS). In the present studies, we confirm that HK-1 is an endogenous agonist at all of the known tachykinin receptors, and is selective for the NK1 receptor over the NK2 and NK3 subtypes. CHO cells transfected with the human NK1 receptor released intracellular calcium in response to HK-1. In addition, HK-1 competed with substance P (SP) for binding to mouse NK1 and human NK1 receptors. In vivo central administration of HK-1 to gerbils and mice induced foot-tapping and scratching behaviors, respectively, similar to those observed following central administration of SP or the NK1 receptor agonist, GR-73632. Furthermore, these behavioral effects were blocked by the selective NK1 receptor antagonist, MK-869. Finally, a comprehensive expression analysis of HK-1 demonstrated that HK-1 mRNA is much more broadly expressed than previously reported with expression observed in many brain regions. Together these data demonstrate that HK-1 is a functional agonist at NK1 receptors and suggest that HK-1 may function both centrally and peripherally.

journal_name

Neuropharmacology

journal_title

Neuropharmacology

authors

Duffy RA,Hedrick JA,Randolph G,Morgan CA,Cohen-Williams ME,Vassileva G,Lachowicz JE,Laverty M,Maguire M,Shan LS,Gustafson E,Varty GB

doi

10.1016/s0028-3908(03)00150-3

subject

Has Abstract

pub_date

2003-08-01 00:00:00

pages

242-50

issue

2

eissn

0028-3908

issn

1873-7064

pii

S0028390803001503

journal_volume

45

pub_type

杂志文章

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