Cited by 129Adenosine and Purinergic SignalingTreatment of Major DepressionNeuroscience and Neuropharmacology Research

Neurochemical Changes in the Mouse Hippocampus Underlying the Antidepressant Effect of Genetic Deletion of P2X7 Receptors

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Csölle, Cecilia, Baranyi, Mária, Zsilla, Gabriella, Kittel, Ágnes, Gölöncsér, Flóra, Illes, Peter, Papp, Edit, Vizi, E. Sylvester +1 more·2013·PLoS ONE

Abstract

Recent investigations have revealed that the genetic deletion of P2X7 receptors (P2rx7) results in an antidepressant phenotype in mice. However, the link between the deficiency of P2rx7 and changes in behavior has not yet been explored. In the present study, we studied the effect of genetic deletion of P2rx7 on neurochemical changes in the hippocampus that might underlie the antidepressant phenotype. P2X7 receptor deficient mice (P2rx7-/-) displayed decreased immobility in the tail suspension test (TST) and an attenuated anhedonia response in the sucrose preference test (SPT) following bacterial endotoxin (LPS) challenge. The attenuated anhedonia was reproduced through systemic treatments with P2rx7 antagonists. The activation of P2rx7 resulted in the concentration-dependent release of [(3)H]glutamate in P2rx7+/+ but not P2rx7-/- mice, and the NR2B subunit mRNA and protein was upregulated in the hippocampus of P2rx7-/- mice. The brain-derived neurotrophic factor (BDNF) expression was higher in saline but not LPS-treated P2rx7-/- mice; the P2rx7 antagonist Brilliant blue G elevated and the P2rx7 agonist benzoylbenzoyl ATP (BzATP) reduced BDNF level. This effect was dependent on the activation of NMDA and non-NMDA receptors but not on Group I metabotropic glutamate receptors (mGluR1,5). An increased 5-bromo-2-deoxyuridine (BrdU) incorporation was also observed in the dentate gyrus derived from P2rx7-/- mice. Basal level of 5-HT was increased, whereas the 5HIAA/5-HT ratio was lower in the hippocampus of P2rx7-/- mice, which accompanied the increased uptake of [(3)H]5-HT and an elevated number of [(3)H]citalopram binding sites. The LPS-induced elevation of 5-HT level was absent in P2rx7-/- mice. In conclusion there are several potential mechanisms for the antidepressant phenotype of P2rx7-/- mice, such as the absence of P2rx7-mediated glutamate release, elevated basal BDNF production, enhanced neurogenesis and increased 5-HT bioavailability in the hippocampus.

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  • Brilliant Blue G attenuated the anhedonia induced by lipopolysaccharide.

    “Initial evidence from Csolle et al. showed that treatment with Brilliant Blue G (BBG), a P2X7R antagonist, attenuated the anhedonia induced by lipopolysaccharide (LPS) [20] and decreased the immobility time of mice exposed to TST [85].”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [20]

  • Treatment with P2X7R antagonists induces antidepressant-like effects in various animal models.

    “Evidence from pharmacological studies have further corroborated this hypothesis, since treatment with P2X7R antagonists induce antidepressant-like effects in various animal models.”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [20]

  • P2X7R-mediated increase in 5-HT levels might be an important mechanism involved in behavioral adaptation to stress.

    “Based on these findings, P2X7R-mediated increase in 5-HT levels might be an important mechanism involved in behavioral adaptation to stress.”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [20]

  • The BzATP-induced decrease in BDNF levels was mediated by P2X7R.

    “suggesting that this response was mediated by P2X7R [20].”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [20]

  • P2X7R KO mice present enhanced neurogenesis.

    “These suggestions are supported by results showing that P2X7R KO mice presents enhanced neurogenesis [20].”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [20]

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  1. [64]Sanacora G (2008) New understanding of mechanisms of action of bipolar medications. J Clin Psychiatry 69 Suppl 5 22– 27. 19265637

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Authors
Csölle, C., Baranyi, M., Zsilla, G., Kittel, Á., Gölöncsér, F., Illes, P., Papp, E., Vizi, E. S., & Sperlágh, B.
Affiliations
  • HUN-REN Institute of Experimental Medicine (HU)
  • Semmelweis University (HU)
Corresponding author
Sperlágh, Beáta
Venue
PLoS ONE
Published
2013-06-21
Volume
8
Issue
6
Pages
e66547
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2089887997
Cited by
128
References
109
Citations by year
2026: 6 · 2025: 6 · 2024: 10 · 2023: 10 · 2022: 19 · 2021: 7 · 2020: 8 · 2019: 13 · 2018: 12 · 2017: 11 · 2016: 9 · 2015: 8 · 2014: 7 · 2013: 1
FWCI
6.92
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Repository of the Academy's Library (Library of the Hungarian Academy of Sciences) (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Semmelweis University Repository (Semmelweis University) (submittedVersion)
Funders
  • Egészségügyi Tudományos Tanács
  • Gedeon Richter
  • National Institutes of Health
  • Directorate for Biological Sciences
  • University of California, Davis (95616, CA 95616)
  • Medical Research Council
  • National Cancer Institute (P01CA095616)
  • National Institute of Neurological Disorders and Stroke (U24NS050606)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Adenosine and Purinergic Signaling
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
P2X7 receptor, gene deletion, hippocampus, brain-derived neurotrophic factor, glutamate release, NR2B subunit, anhedonia, endotoxin, serotonin, neurogenesis, dentate gyrus, NMDA receptor, non-NMDA receptors
MeSH terms
Adenosine Triphosphate, Animals, Lipopolysaccharides, Serotonin, Gene Deletion, Mice, Knockout, Glutamic Acid, Dentate Gyrus, Brain-Derived Neurotrophic Factor, Mice, Neurogenesis, Receptors, Purinergic P2X7, Anhedonia

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