Cited by 46Cannabis and Cannabinoid ResearchNeuroscience and Neuropharmacology ResearchReceptor Mechanisms and Signaling

Anatomical characterization of the cannabinoid CB1 receptor in cell‐type–specific mutant mouse rescue models

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Gutiérrez‐Rodríguez, Ana, Puente, Nagore, Elezgarai, Izaskun, Ruehle, Sabine, Lutz, Beat, Reguero, Leire, Gerrikagoitia, Inmaculada, Marsicano, Giovanni +1 more·2017·Journal of Comparative Neurology

Abstract

ABSTRACT Type 1 cannabinoid (CB1) receptors are widely distributed in the brain. Their physiological roles depend on their distribution pattern, which differs remarkably among cell types. Hence, subcellular compartments with little but functionally relevant CB1 receptors can be overlooked, fostering an incomplete mapping. To overcome this, knockin mice with cell‐type–specific rescue of CB1 receptors have emerged as excellent tools for investigating CB1 receptors’ cell‐type–specific localization and sufficient functional role with no bias. However, to know whether these rescue mice maintain endogenous CB1 receptor expression level, detailed anatomical studies are necessary. The subcellular distribution of hippocampal CB1 receptors of rescue mice that express the gene exclusively in dorsal telencephalic glutamatergic neurons (Glu‐CB1‐RS) or GABAergic neurons (GABA‐CB1‐RS) was studied by immunoelectron microscopy. Results were compared with conditional CB1 receptor knockout lines. As expected, CB1 immunoparticles appeared at presynaptic plasmalemma, making asymmetric and symmetric synapses. In the hippocampal CA1 stratum radiatum, the values of the CB1 receptor‐immunopositive excitatory and inhibitory synapses were Glu‐CB1‐RS, 21.89% (glutamatergic terminals); 2.38% (GABAergic terminals); GABA‐CB1‐RS, 1.92% (glutamatergic terminals); 77.92% (GABAergic terminals). The proportion of CB1 receptor‐immunopositive excitatory and inhibitory synapses in the inner one‐third of the dentate molecular layer was Glu‐CB1‐RS, 53.19% (glutamatergic terminals); 2.30% (GABAergic terminals); GABA‐CB1‐RS, 3.19% (glutamatergic terminals); 85.07% (GABAergic terminals). Taken together, Glu‐CB1‐RS and GABA‐CB1‐RS mice show the usual CB1 receptor distribution and expression in hippocampal cell types with specific rescue of the receptor, thus being ideal for in‐depth anatomical and functional investigations of the endocannabinoid system. J. Comp. Neurol. 525:302–318, 2017. © 2016 Wiley Periodicals, Inc.

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Crossref · 10.1002/cne.24066

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  • Functional expression of TRPV1 may be underestimated if TRPV1 is expressed post- and presynaptically and acts far away from its synthesis sites.

    “functional expression may be underestimated if TRPV1 is expressed post and presynaptically (Aguiar et al., 2014) and acts far away from its synthesis sites (Gutierrez-Rodriguez et al., 2016; Ruehle et al., 2013).”

    From The endocannabinoid system as a target for novel anxiolytic drugs (2017) · cites this paper as Gutierrez-Rodriguez et al., 2016

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Authors
Gutiérrez‐Rodríguez, A., Puente, N., Elezgarai, I., Ruehle, S., Lutz, B., Reguero, L., Gerrikagoitia, I., Marsicano, G., & Grandes, P.
Affiliations
  • Department of Neurosciences University of the Basque Country UPV/EHU E‐48940 Leioa Spain
  • University of the Basque Country (ES)
  • MRC Laboratory of Molecular Biology (GB)
  • University Medical Center of the Johannes Gutenberg University Mainz (DE)
  • Université de Bordeaux (FR)
Corresponding author
Grandes, Pedro
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2016-07-08
Volume
525
Issue
2
Pages
302-318
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2461893208
Cited by
46
References
78
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 9 · 2021: 7 · 2020: 6 · 2019: 4 · 2018: 9 · 2017: 4 · 2016: 1
FWCI
4.86
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • Zenodo (CERN European Organization for Nuclear Research) (submittedVersion, other-oa)
Funders
  • Institute of Infection and Immunity (RD12/0028/0004 (to P.G))
  • Institut national de la santé et de la recherche médicale (EU‐Fp7 (to G.M.), PAINCAGE, HEALTH‐603191 (to G.M.))
  • European Research Council (Endofood, ERC‐2010‐StG‐260515 (to G.M.), CannaPreg, ERC‐2014‐PoC‐640923 (to G.M.))
  • Fondation de l'Avenir pour la Recherche Médicale Appliquée (DRM20101220445 (to G.M.))
  • Agence Nationale de la Recherche (ANR Blanc NeuroNutriSens ANR‐13‐BSV4‐0006 (to G.M.), BRAIN ANR‐10‐LABX‐0043 (to G.M.); Grant sponsor: Deutsche Forschungsgemeinschaft (DFG); Grant number: SFB‐TRR 58; subproject A04 (to B.L.))
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
CB1 receptor, cannabinoid type 1 receptor, knock-in mice, hippocampus, synapse localization, glutamatergic neurons, GABAergic neurons, dentate gyrus, CA1 stratum radiatum, endocannabinoid system, immunoelectron microscopy, conditional knockout mice, subcellular localization
MeSH terms
Animals, Female, Hippocampus, Male, Mice, Inbred C57BL, Mice, Mutant Strains, Neurons, Microscopy, Immunoelectron, Receptor, Cannabinoid, CB1, Mice

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