Cited by 71Adenosine and Purinergic SignalingNeuroscience and Neuropharmacology ResearchPain Mechanisms and Treatments

P2X7pre‐synaptic receptors in adult rat cerebrocortical nerve terminals: a role in ATP‐induced glutamate release

Marcoli, Manuela, Cervetto, Chiara, Paluzzi, Paola, Guarnieri, Stefania, Alloisio, Susanna, Thellung, Stefano, Nobile, Mario, Maura, Guido·2008·Journal of Neurochemistry

Abstract

Although growing evidence suggests that extracellular ATP might play roles in the control of astrocyte/neuron crosstalk in the CNS by acting on P2X(7) receptors, it is still unclear whether neuronal functions can be attributed to P2X(7) receptors. In the present paper, we investigate the location, pharmacological profile, and function of P2X(7) receptors on cerebrocortical nerve terminals freshly prepared from adult rats, by measuring glutamate release and calcium accumulation. The preparation chosen (purified synaptosomes) ensures negligible contamination of non-neuronal cells and allows exposure of 'nude' release-regulating pre-synaptic receptors. To confirm the results obtained, we also carried out specific experiments on human embryonic kidney 293 cells which had been stably transfected with rat P2X(7) receptors. Together, our findings suggest that (i) P2X(7) receptors are present in a subpopulation of adult rat cerebrocortical nerve terminals; (ii) P2X(7) receptors are localized on glutamatergic nerve terminals; (iii) P2X(7) receptors play a significant role in ATP-evoked glutamate efflux, which involves Ca(2+)-dependent vesicular release; and (iv) the P2X(7) receptor itself constitutes a significant Ca(2+)-independent mode of exit for glutamate.

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Crossref · 10.1111/j.1471-4159.2008.05322.x

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  • Studies in pure neuronal cell cultures and synaptosomes confirm that stimulation of P2X7R expressed in nerve terminals favors glutamate and GABA release.

    “The effects mediated by P2X7R in glial cells and adenosine can be avoided in studies in pure neuronal cell cultures [106] and synaptosomes [107,108,109], which confirms that stimulation of P2X7R expressed in nerve terminals favors glutamate and GABA release.”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [108]

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Authors
Marcoli, M., Cervetto, C., Paluzzi, P., Guarnieri, S., Alloisio, S., Thellung, S., Nobile, M., & Maura, G.
Affiliations
  • University of Genoa (IT)
  • National Research Council (IT)
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2008-02-28
Volume
105
Issue
6
Pages
2330-2342
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W1553995814
Cited by
70
References
57
Citations by year
2026: 2 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 4 · 2020: 3 · 2019: 1 · 2018: 2 · 2017: 3 · 2016: 4 · 2015: 13 · 2014: 5 · 2013: 5 · 2012: 9
FWCI
2.24
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion)
Funders
  • Ministero dell’Istruzione, dell’Università e della Ricerca
  • Fondazione Pierfranco e Luisa Mariani
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Adenosine and Purinergic Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
Keywords
P2X7 receptor, glutamate release, ATP, synaptosomes, calcium accumulation, vesicle release, glutamatergic terminals, astrocyte-neuron crosstalk
MeSH terms
Adenosine Triphosphate, Age Factors, Animals, Cell Line, Cerebral Cortex, Humans, Male, Rats, Sprague-Dawley, Presynaptic Terminals, Receptors, Purinergic P2, Glutamic Acid, Rats, Receptors, Purinergic P2X7

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