Résumé
Les cellules microgliales représentent les macrophages résidents du système nerveux central. En réponse à une lésion des nerfs périphériques, les microglies spinales acquièrent un phénotype immunocompétent. La microglie peut « sentir » l’activité neuronale par le biais d’un répertoire important de récepteurs aux neurotransmetteurs. Parmi ceux-ci, les récepteurs purinergiques P2X, en induisant la sécrétion de molécules pro-inflammatoires, exacerbent l’excitabilité neuronale dans la corne dorsale de la moelle épinière et facilitent ainsi la genèse des douleurs neuropathiques.
Abstract
Microglia are brain resident macrophages. In response to peripheral nerve lesion, spinal cord microglia acquire an immunocompetent phenotype. Microglia can “sense” neuronal activity through an array of receptors for neurotransmitters. Among these, P2X purinergic receptors, by triggering the secretion of pro-inflammatory molecules, shape neuronal excitability in the dorsal horn of the spinal cord and thus promote neuropathic pain.
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Ulmann, L., Rassendren, F. Microglie et récepteurs purinergiques P2X dans la douleur neuropathique : un duo excitateur inattendu. Douleur analg 21, 221–226 (2008). https://doi.org/10.1007/s11724-008-0109-0
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DOI: https://doi.org/10.1007/s11724-008-0109-0