» Articles » PMID: 15099684

Neuropeptide Y Inhibits Capsaicin-sensitive Nociceptors Via a Y1-receptor-mediated Mechanism

Overview
Journal Neuroscience
Specialty Neurology
Date 2004 Apr 22
PMID 15099684
Citations 17
Authors
Affiliations
Soon will be listed here.
Abstract

Neuropeptide Y (NPY) is expressed in certain primary afferent fibers, is up-regulated in response to tissue injury and is capable of inhibiting nociceptive behavior at the spinal level. However, the spinal mechanism(s) for NPY-evoked antinociception is unknown. In this study, we evaluated the hypothesis that agonists at the NPY Y1 receptor subtype (Y1-R) inhibit exocytosis from the capsaicin-sensitive class of nociceptors. Using in vitro superfusion of rat dorsal spinal cord slices, pre-treatment with the Y1-R agonist [Leu(31)Pro(34)]NPY significantly inhibited capsaicin-evoked release of immunoreactive calcitonin gene-related peptide with an EC(50) value of 10.6 nM. This inhibitory effect was concentration dependent, significantly attenuated by pre-treatment with the Y1 receptor antagonist BIBP3226 and reproduced by synthetic NPY. Examination of adult rat dorsal root ganglia using double immunofluorescent labeling revealed frequent co-localization of Y1 receptor immunoreactivity in vanilloid receptor type 1-immunoreactive neurons, indicating that Y1 agonists may directly modulate the capsaicin-sensitive class of nociceptors. Collectively, these results indicate that NPY is capable of inhibiting capsaicin-sensitive neurons via a Y1 receptor mechanism, suggesting the mechanisms for spinal NPY-induced antinociception is due, at least in part, to inhibition of central terminals of capsaicin-sensitive nociceptors.

Citing Articles

Blockade of mesenteric and omental adipose tissue sensory neurons improves cardiac remodeling through sympathetic pathway.

Huang J, Liu X, Qiu Q, Tan W, Li R, Xi H iScience. 2024; 27(7):110245.

PMID: 39055939 PMC: 11269788. DOI: 10.1016/j.isci.2024.110245.


Mechanical and chemical itch regulated by neuropeptide Y-Y signaling.

Chen S, Chen J, Tang D, Yin W, Xu S, Gao P Mol Pain. 2024; 20:17448069241242982.

PMID: 38485252 PMC: 10981256. DOI: 10.1177/17448069241242982.


Cracking the Code: The Role of Peripheral Nervous System Signaling in Fracture Repair.

Morris A, Parker R, Nazzal M, Natoli R, Fehrenbacher J, Kacena M Curr Osteoporos Rep. 2024; 22(1):193-204.

PMID: 38236511 PMC: 10912155. DOI: 10.1007/s11914-023-00846-y.


Transcription factor mesenchyme homeobox protein 2 (MEOX2) modulates nociceptor function.

Kokotovic T, Lenartowicz E, Langeslag M, Ciotu C, Fell C, Scaramuzza A FEBS J. 2022; 289(12):3457-3476.

PMID: 35029322 PMC: 9306780. DOI: 10.1111/febs.16347.


Targeting spinal neuropeptide Y1 receptor-expressing interneurons to alleviate chronic pain and itch.

Nelson T, Taylor B Prog Neurobiol. 2020; 196:101894.

PMID: 32777329 PMC: 8088728. DOI: 10.1016/j.pneurobio.2020.101894.


References
1.
Xu I, Hao J, Xu X, Hokfelt T, Wiesenfeld-Hallin Z . The effect of intrathecal selective agonists of Y1 and Y2 neuropeptide Y receptors on the flexor reflex in normal and axotomized rats. Brain Res. 1999; 833(2):251-7. DOI: 10.1016/s0006-8993(99)01551-6. View

2.
Naveilhan P, Hassani H, Lucas G, Blakeman K, Hao J, Xu X . Reduced antinociception and plasma extravasation in mice lacking a neuropeptide Y receptor. Nature. 2001; 409(6819):513-7. DOI: 10.1038/35054063. View

3.
Nouel D, Dumont Y, Beaudet A, Quirion R . Association of neuropeptide Y Y1 receptors with glutamate-positive and NPY-positive neurons in rat hippocampal cultures. Eur J Neurosci. 2000; 12(4):1319-30. DOI: 10.1046/j.1460-9568.2000.00024.x. View

4.
Ossipov M, Zhang E, Carvajal C, Gardell L, Quirion R, Dumont Y . Selective mediation of nerve injury-induced tactile hypersensitivity by neuropeptide Y. J Neurosci. 2002; 22(22):9858-67. PMC: 6757820. View

5.
Balasubramaniam A . Neuropeptide Y family of hormones: receptor subtypes and antagonists. Peptides. 1997; 18(3):445-57. DOI: 10.1016/s0196-9781(96)00347-6. View