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Nociceptive sensory neurons drive interleukin-23-mediated psoriasiform skin inflammation.

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Title: Nociceptive sensory neurons drive interleukin-23-mediated psoriasiform skin inflammation.
Authors: Riol-Blanco, Lorena, Ordovas-Montanes, Jose, Perro, Mario, Naval, Elena, Thiriot, Aude, Alvarez, David, Paust, Silke, Wood, John N., von Andrian, Ulrich H.
Source: Nature. 6/1/2014, Vol. 510 Issue 7503, p157-161. 5p. 2 Diagrams, 12 Graphs.
Subjects: Nociceptors, Sensory neurons, Interleukin-23, Psoriasis, Inflammation, Dendritic cells, Autonomic nervous system
Abstract: The skin has a dual function as a barrier and a sensory interface between the body and the environment. To protect against invading pathogens, the skin harbours specialized immune cells, including dermal dendritic cells (DDCs) and interleukin (IL)-17-producing γδ T (γδT17) cells, the aberrant activation of which by IL-23 can provoke psoriasis-like inflammation. The skin is also innervated by a meshwork of peripheral nerves consisting of relatively sparse autonomic and abundant sensory fibres. Interactions between the autonomic nervous system and immune cells in lymphoid organs are known to contribute to systemic immunity, but how peripheral nerves regulate cutaneous immune responses remains unclear. We exposed the skin of mice to imiquimod, which induces IL-23-dependent psoriasis-like inflammation. Here we show that a subset of sensory neurons expressing the ion channels TRPV1 and Nav1.8 is essential to drive this inflammatory response. Imaging of intact skin revealed that a large fraction of DDCs, the principal source of IL-23, is in close contact with these nociceptors. Upon selective pharmacological or genetic ablation of nociceptors, DDCs failed to produce IL-23 in imiquimod-exposed skin. Consequently, the local production of IL-23-dependent inflammatory cytokines by dermal γδT17 cells and the subsequent recruitment of inflammatory cells to the skin were markedly reduced. Intradermal injection of IL-23 bypassed the requirement for nociceptor communication with DDCs and restored the inflammatory response. These findings indicate that TRPV1+Nav1.8+ nociceptors, by interacting with DDCs, regulate the IL-23/IL-17 pathway and control cutaneous immune responses. [ABSTRACT FROM AUTHOR]
Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Nociceptive sensory neurons drive interleukin-23-mediated psoriasiform skin inflammation.
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  Data: <searchLink fieldCode="AR" term="%22Riol-Blanco%2C+Lorena%22">Riol-Blanco, Lorena</searchLink><br /><searchLink fieldCode="AR" term="%22Ordovas-Montanes%2C+Jose%22">Ordovas-Montanes, Jose</searchLink><br /><searchLink fieldCode="AR" term="%22Perro%2C+Mario%22">Perro, Mario</searchLink><br /><searchLink fieldCode="AR" term="%22Naval%2C+Elena%22">Naval, Elena</searchLink><br /><searchLink fieldCode="AR" term="%22Thiriot%2C+Aude%22">Thiriot, Aude</searchLink><br /><searchLink fieldCode="AR" term="%22Alvarez%2C+David%22">Alvarez, David</searchLink><br /><searchLink fieldCode="AR" term="%22Paust%2C+Silke%22">Paust, Silke</searchLink><br /><searchLink fieldCode="AR" term="%22Wood%2C+John+N%2E%22">Wood, John N.</searchLink><br /><searchLink fieldCode="AR" term="%22von+Andrian%2C+Ulrich+H%2E%22">von Andrian, Ulrich H.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 6/1/2014, Vol. 510 Issue 7503, p157-161. 5p. 2 Diagrams, 12 Graphs.
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  Data: The skin has a dual function as a barrier and a sensory interface between the body and the environment. To protect against invading pathogens, the skin harbours specialized immune cells, including dermal dendritic cells (DDCs) and interleukin (IL)-17-producing γδ T (γδT17) cells, the aberrant activation of which by IL-23 can provoke psoriasis-like inflammation. The skin is also innervated by a meshwork of peripheral nerves consisting of relatively sparse autonomic and abundant sensory fibres. Interactions between the autonomic nervous system and immune cells in lymphoid organs are known to contribute to systemic immunity, but how peripheral nerves regulate cutaneous immune responses remains unclear. We exposed the skin of mice to imiquimod, which induces IL-23-dependent psoriasis-like inflammation. Here we show that a subset of sensory neurons expressing the ion channels TRPV1 and Nav1.8 is essential to drive this inflammatory response. Imaging of intact skin revealed that a large fraction of DDCs, the principal source of IL-23, is in close contact with these nociceptors. Upon selective pharmacological or genetic ablation of nociceptors, DDCs failed to produce IL-23 in imiquimod-exposed skin. Consequently, the local production of IL-23-dependent inflammatory cytokines by dermal γδT17 cells and the subsequent recruitment of inflammatory cells to the skin were markedly reduced. Intradermal injection of IL-23 bypassed the requirement for nociceptor communication with DDCs and restored the inflammatory response. These findings indicate that TRPV1+Nav1.8+ nociceptors, by interacting with DDCs, regulate the IL-23/IL-17 pathway and control cutaneous immune responses. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: 6/1/2014
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