Activation of primary sensory neurons by the topical application of capsaicin on the epidermis of a re-innervated organotypic human skin model. - Université de Bretagne Occidentale Access content directly
Journal Articles Experimental Dermatology Year : 2014

Activation of primary sensory neurons by the topical application of capsaicin on the epidermis of a re-innervated organotypic human skin model.

Abstract

Using an ex vivo skin-nerve preparation, skin and nerve cells were reconstituted into a single unit and maintained in a nutrient medium bath until required experimentally. Our objective was to use the epidermis as a relay for the induction of an electric current to the neurons following the topical application of capsaicin on the skin epidermis of the skin explant, an agonist of the TRPV1 channel implicated in pruritus and pain. After 10-20 days of coculture to form the re-innervated skin model, we applied a solution of capsaicin directly on the epidermis of the skin explant (4 μm). The resulting current was recorded using a path-clamp technique on the neuronal fibres. Following the topical application of capsaicin, spontaneous activity was triggered, as characterised by repetitive spikes with periods of 125, 225 or 275 ms. This study demonstrates that the skin explant and nerve cells preparation may receive stimuli and be used to screen molecules or to study signal transmission.

Domains

Neurobiology

Dates and versions

hal-00947002 , version 1 (14-02-2014)

Identifiers

Cite

Nicolas Lebonvallet, Jean-Pierre Pennec, Christelle Le Gall-Ianotto, Jérémy Chéret, Christine Jeanmaire, et al.. Activation of primary sensory neurons by the topical application of capsaicin on the epidermis of a re-innervated organotypic human skin model.. Experimental Dermatology, 2014, 23 (1), pp.73-5. ⟨10.1111/exd.12294⟩. ⟨hal-00947002⟩
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