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Neuropeptide FF prevented histamine- or chloroquine-induced acute itch behavior through non-NPFF receptors mechanism in male mice.
- Source :
-
Neuropeptides [Neuropeptides] 2024 Dec; Vol. 108, pp. 102481. Date of Electronic Publication: 2024 Nov 04. - Publication Year :
- 2024
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Abstract
- The neuropeptide FF (NPFF) system regulates various physiological and pharmacological functions, particularly pain modulation. However, the modulatory effect of NPFF system on itch remains unclear. To investigate the modulatory effect and functional mechanism induced by NPFF system on acute itch, we examined the effects of supraspinal administration of NPFF and related peptides on acute itch induced by intradermal (i.d.) injection of histamine or chloroquine in male mice. Our results indicated that intracerebroventricular (i.c.v.) administration of NPFF dose-dependently prevented histamine- or chloroquine-induced acute itch behaviors. In addition, the modulatory effect of NPFF was not affected by the selective NPFF receptor antagonist RF9. Furthermore, we investigated the effects of NPVF and dNPA, the selective agonists of NPFF <subscript>1</subscript> and NPFF <subscript>2</subscript> receptors respectively, on the acute itch. The results demonstrated that both NPFF agonists effectively prevented acute itch induced by histamine or chloroquine in a manner similar to NPFF, and their effects were also not modified by RF9. To further investigate the possible mechanism of the NPFF receptors agonists, the NPFF-derived analogues [Phg <superscript>8</superscript> ]-NPFF and NPFF(1-7)-NH <subscript>2</subscript> that could not activate NPFF receptors in cAMP assays were subsequently tested in the acute itch model. Interestingly, [Phg <superscript>8</superscript> ]-NPFF, but not NPFF(1-7)-NH <subscript>2</subscript> , prevented acute itch behavior after i.c.v. administration. In conclusion, our findings reveal that NPFF and related peptides prevent histamine- and chloroquine-induced acute itch through a NPFF receptor-independent mechanism. And it was revealed that the C-terminal phenyl structure of NPFF may play a crucial role in these modulatory effects on acute itch.<br />Competing Interests: Declaration of competing interest None.<br /> (Copyright © 2024. Published by Elsevier Ltd.)
- Subjects :
- Animals
Male
Mice
Behavior, Animal drug effects
Chloroquine pharmacology
Pruritus chemically induced
Pruritus metabolism
Pruritus drug therapy
Pruritus prevention & control
Histamine metabolism
Histamine pharmacology
Receptors, Neuropeptide metabolism
Receptors, Neuropeptide antagonists & inhibitors
Oligopeptides pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1532-2785
- Volume :
- 108
- Database :
- MEDLINE
- Journal :
- Neuropeptides
- Publication Type :
- Academic Journal
- Accession number :
- 39504659
- Full Text :
- https://doi.org/10.1016/j.npep.2024.102481