Trigeminal satellite cells modulate neuronal responses to triptans: Relevance for migraine therapy

Alice De Corato, Alessandro Capuano, Diego Currò, Giuseppe Tringali, Pierluigi Navarra, Cinzia Dello Russo

Research output: Contribution to journalArticle

Abstract

In the present paper, we have further developed an in vitro model to study neuronal-glial interaction at trigeminal level by characterizing the effects of conditioned medium (CM) collected from activated primary cultures of satellite glial cells (SGCs) on calcitonin gene-related peptide (CGRP) release from rat trigeminal neurons. Moreover, we investigated whether such release is inhibited by a clinically relevant anti-migraine drug, sumatriptan. CM effects were tested on trigeminal neuronal cultures in different conditions of activation and at different time points. Long-term exposures of trigeminal neurons to CM increased directly neuronal CGRP release, which was further enhanced by the exposure to capsaicin. In this framework, the anti-migraine drug sumatriptan was able to inhibit the evoked CGRP release from naïve trigeminal neuron cultures, as well as from trigeminal cultures pre-exposed for 30min to CM. On the contrary, sumatriptan failed to inhibit evoked CGRP release from trigeminal neurons after prolonged (4 and 8h) pre-exposures to CM. These findings were confirmed in co-culture experiments (neurons and SGCs), where activation of SGCs or a bradykinin priming were used. Our data demonstrate that SGCs activation could influence neuronal excitability, and that this event affects the neuronal responses to triptans.

Original languageEnglish
Pages (from-to)109-116
Number of pages8
JournalNeuron Glia Biology
Volume7
Issue number2-4
DOIs
Publication statusPublished - May 2011

Keywords

  • CGRP
  • Migraine
  • Neuronal sensitization
  • Sumatriptan
  • Trigeminal satellite cells

ASJC Scopus subject areas

  • Cell Biology
  • Cellular and Molecular Neuroscience

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