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Chronic brain histamine depletion in adult mice induced depression-like behaviours and impaired sleep-wake cycle.
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- Author(s): Yamada Y;Yamada Y; Yoshikawa T; Yoshikawa T; Naganuma F; Naganuma F; Naganuma F; Kikkawa T; Kikkawa T; Osumi N; Osumi N; Yanai K; Yanai K
- Source:
Neuropharmacology [Neuropharmacology] 2020 Sep 15; Vol. 175, pp. 108179. Date of Electronic Publication: 2020 Jun 06.- Publication Type:
Journal Article; Research Support, Non-U.S. Gov't- Language:
English - Source:
- Additional Information
- Source: Publisher: Pergamon Press Country of Publication: England NLM ID: 0236217 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-7064 (Electronic) Linking ISSN: 00283908 NLM ISO Abbreviation: Neuropharmacology Subsets: MEDLINE
- Publication Information: Publication: Oxford : Pergamon Press
Original Publication: Oxford, New York, Pergamon. - Subject Terms:
- Abstract: Histamine acts as a neurotransmitter to regulate various physiological processes. Brain histamine is synthesized from an essential amino acid histidine in a reaction catalysed by histidine decarboxylase (Hdc). Hdc-positive neurons exist mainly in the tuberomammillary nucleus (TMN) of the posterior hypothalamus and project their axons to the entire brain. Recent studies have reported that a chronic decrease in histamine levels in the adult human brain was observed in several neurological disorders. However, it is poorly understood whether lower histamine levels play a causative role in those disorders. In the present study, we induced chronic histamine deficiency in the brains of adult mice to allow direct interpretation of the relationship between an impaired histaminergic nervous system and the resultant phenotype. To induce chronic brain histamine deficiency starting in adulthood, adeno-associated virus expressing Cre recombinase was microinjected into the TMN of Hdc flox mice (cKO mice) at the age of 8 weeks. Immunohistochemical analysis showed expression of Cre recombinase in the TMN of cKO mice. The reduction of histamine contents with the decreased Hdc expression in cKO brain was also confirmed. Behavioural studies revealed that chronic histamine depletion in cKO mice induced depression-like behaviour, decreased locomotor activity in the home cage, and impaired aversive memory. Sleep analysis showed that cKO mice exhibited a decrease in wakefulness and increase in non-rapid eye movement sleep throughout the day. Taken together, this study clearly demonstrates that chronic histamine depletion in the adult mouse brain plays a causative role in brain dysfunction.
(Copyright © 2020 Elsevier Ltd. All rights reserved.) - Contributed Indexing: Keywords: Adeno-associated virus; Histamine; Histidine decarboxylase; Sleep analysis
- Accession Number: 820484N8I3 (Histamine)
EC 4.1.1.22 (Histidine Decarboxylase) - Publication Date: Date Created: 20200612 Date Completed: 20210923 Latest Revision: 20210923
- Publication Date: 20221213
- Accession Number: 10.1016/j.neuropharm.2020.108179
- Accession Number: 32522573
- Source:
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