Osmolality-induced tuning of action potentials in trigeminal ganglion neurons.
Osmolality-induced tuning of action potentials in trigeminal ganglion neurons.
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DOI:
10.1016/j.neulet.2009.01.022
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发表时间:
2009-03-06
影响因子:
2.5
通讯作者:
Liu L
中科院分区:
文献类型:
--
作者:
Chen L;Liu C;Liu L
The present study explored the effect of anisotonicity on action potential (AP) in cultured trigeminal ganglion (TG) neurons. We demonstrate that the number of evoked APs was increased by both hypo- and hypertonic treatment. Transient Receptor Potential Vanilloid 4 receptor (TRPV4) activator increased the number of APs, but only hypotonic-response was markedly blocked in TRPV4−/− mice. Additionally, inhibition of PKC attenuated hypotonicity-induced increase, whereas antagonism of PKA attenuated hypertonicity-response. We conclude that anisotonicity increases excitability of nociceptors, which might be involved in anisotonicity-induced nociception. The increase of APs by hypo- and hypertonicity is mediated through different receptor and intracellular signaling pathways.
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