Neurotransmissions of antidepressant-like effects of neuromedin U-23 in mice

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Abstract

Neuromedin U (NmU) is a widely distributed and multifunctional peptide in the central nervous system and the peripheral tissues. Little is know about the mechanisms of NmU on brain functions. The rodent isoform of the NmU, NmU-23, has been shown to have anxiolytic effects involved in the β-adrenergic and cholinergic nervous systems in elevated plus maze test. NmU-23 was tested for antidepressant-like effects in modified forced swimming test (FST) in mice and furthermore, the involvement of the adrenergic, serotonergic, cholinergic, dopaminergic or gaba-ergic receptors in the antidepressant-like effect of NmU-23 was studied in modified mice FST. Mice were pretreated with a non-selective α-adrenergic receptor antagonist phenoxybenzamine, an α1-adrenergic receptor antagonist, prazosin, an α2-adrenergic receptor antagonist, yohimbine, a β-adrenergic receptor antagonist, propranolol, a mixed 5-HT1/5-HT2 serotonergic receptor antagonist, methysergide, a non-selective 5-HT2 serotonergic receptor antagonist, cyproheptadine, nonselective muscarinic acetylcholine receptor antagonist, atropine, D2,D3,D4 dopamine receptor antagonist, haloperidol or γ-aminobutyric acid subunit A (GABAA) receptor antagonist, bicuculline.NmU-23 showed the antidepressant-like effects by decreasing the immobility time and increasing the climbing and swimming time. Prazosin, haloperidol, and bicuculline prevented the effects of NmU-23 on the climbing and swimming time. Methysergide and cyproheptadine prevented the effects of NmU-23 on the immobility, swimming and climbing time. Atropine prevented the effects of NmU-23 on the climbing time. Phenoxybenzamine, yohimbine and propranolol did not change the effects of NmU-23.The results demonstrated that the antidepressant-like effect of NmU-23 is mediated, at least in part, by an interaction of the α2-adrenergic, 5-HT1-2 serotonergic, D2,D3,D4 dopamine receptor, muscarinic acetylcholine receptors and γ-aminobutyric acid subunit A (GABAA) receptor in a modified mouse FST.

Original languageEnglish
Pages (from-to)196-199
Number of pages4
JournalBehavioural Brain Research
Volume259
DOIs
Publication statusPublished - Feb 1 2014

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Synaptic Transmission
Antidepressive Agents
Adrenergic Antagonists
Adrenergic Agents
Cyproheptadine
Aminobutyrates
Methysergide
Phenoxybenzamine
Bicuculline
Yohimbine
Prazosin
Muscarinic Receptors
Haloperidol
Atropine
Propranolol
Cholinergic Agents
neuromedin U
Dopamine D4 Receptors
Dopamine D3 Receptors
GABA-A Receptor Antagonists

Keywords

  • Depression
  • Neuromedin U
  • Receptor

ASJC Scopus subject areas

  • Behavioral Neuroscience

Cite this

Neurotransmissions of antidepressant-like effects of neuromedin U-23 in mice. / Tanaka, M.; Telegdy, G.

In: Behavioural Brain Research, Vol. 259, 01.02.2014, p. 196-199.

Research output: Contribution to journalArticle

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abstract = "Neuromedin U (NmU) is a widely distributed and multifunctional peptide in the central nervous system and the peripheral tissues. Little is know about the mechanisms of NmU on brain functions. The rodent isoform of the NmU, NmU-23, has been shown to have anxiolytic effects involved in the β-adrenergic and cholinergic nervous systems in elevated plus maze test. NmU-23 was tested for antidepressant-like effects in modified forced swimming test (FST) in mice and furthermore, the involvement of the adrenergic, serotonergic, cholinergic, dopaminergic or gaba-ergic receptors in the antidepressant-like effect of NmU-23 was studied in modified mice FST. Mice were pretreated with a non-selective α-adrenergic receptor antagonist phenoxybenzamine, an α1/α2β-adrenergic receptor antagonist, prazosin, an α2-adrenergic receptor antagonist, yohimbine, a β-adrenergic receptor antagonist, propranolol, a mixed 5-HT1/5-HT2 serotonergic receptor antagonist, methysergide, a non-selective 5-HT2 serotonergic receptor antagonist, cyproheptadine, nonselective muscarinic acetylcholine receptor antagonist, atropine, D2,D3,D4 dopamine receptor antagonist, haloperidol or γ-aminobutyric acid subunit A (GABAA) receptor antagonist, bicuculline.NmU-23 showed the antidepressant-like effects by decreasing the immobility time and increasing the climbing and swimming time. Prazosin, haloperidol, and bicuculline prevented the effects of NmU-23 on the climbing and swimming time. Methysergide and cyproheptadine prevented the effects of NmU-23 on the immobility, swimming and climbing time. Atropine prevented the effects of NmU-23 on the climbing time. Phenoxybenzamine, yohimbine and propranolol did not change the effects of NmU-23.The results demonstrated that the antidepressant-like effect of NmU-23 is mediated, at least in part, by an interaction of the α2-adrenergic, 5-HT1-2 serotonergic, D2,D3,D4 dopamine receptor, muscarinic acetylcholine receptors and γ-aminobutyric acid subunit A (GABAA) receptor in a modified mouse FST.",
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