Journal
ALLERGOLOGY INTERNATIONAL
Volume 66, Issue 1, Pages 22-30Publisher
JAPANESE SOCIETY ALLERGOLOGY
DOI: 10.1016/j.alit.2016.10.003
Keywords
Itch; TRPV1; TRPA1; TRPV3; TRPV4
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Funding
- Grants-in-Aid for Scientific Research [15H02501] Funding Source: KAKEN
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Itch is an unpleasant cutaneous sensation that can arise following insect bites, exposure to plant ingredients, and some diseases. Itch can also have idiopathic causes. Itch sensations are thought to protect against external insults and toxic substances. Although itch is not directly lethal, chronic and long lasting itch in certain diseases can worsen quality of life. Therefore, the mechanisms responsible for chronic itch require careful investigation. There is a significant amount of basic research concerning itch, and the effect of various itch mediators on primary sensory neurons have been studied. Interestingly, many mediators of itch involve signaling related to transient receptor potential (TRP) channels. TRP channels, especially thermosensitive TRP channels, are expressed by primary sensory neurons and skin keratinocytes, which receive multimodal stimuli, including those that cause itch sensations. Here we review the molecular and cellular mechanisms of itch and the involvement of TRP channels in mediating itch sensations. Copyright (C) 2017, Japanese Society of Allergology. Production and hosting by Elsevier B.V.
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