Article ; Online: A neuropeptide code for itch.
2021 Volume 22, Issue 12, Page(s) 758–776
Abstract: Itch is one of the most primal sensations, being both ubiquitous and important for the well-being of animals. For more than a century, a desire to understand how itch is encoded by the nervous system has prompted the advancement of many theories. Within ... ...
Abstract | Itch is one of the most primal sensations, being both ubiquitous and important for the well-being of animals. For more than a century, a desire to understand how itch is encoded by the nervous system has prompted the advancement of many theories. Within the past 15 years, our understanding of the molecular and neural mechanisms of itch has undergone a major transformation, and this remarkable progress continues today without any sign of abating. Here I describe accumulating evidence that indicates that itch is distinguished from pain through the actions of itch-specific neuropeptides that relay itch information to the spinal cord. According to this model, classical neurotransmitters transmit, inhibit and modulate itch information in a context-, space- and time-dependent manner but do not encode itch specificity. Gastrin-releasing peptide (GRP) is proposed to be a key itch-specific neuropeptide, with spinal neurons expressing GRP receptor (GRPR) functioning as a key part of a convergent circuit for the conveyance of peripheral itch information to the brain. |
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MeSH term(s) | Animals ; Gastrin-Releasing Peptide/metabolism ; Humans ; Neurons/metabolism ; Neuropeptides/metabolism ; Pruritus/metabolism ; Spinal Cord/metabolism |
Chemical Substances | Neuropeptides ; Gastrin-Releasing Peptide (80043-53-4) |
Language | English |
Publishing date | 2021-10-18 |
Publishing country | England |
Document type | Journal Article ; Research Support, N.I.H., Extramural ; Review |
ZDB-ID | 2034150-7 |
ISSN | 1471-0048 ; 1471-0048 ; 1471-003X |
ISSN (online) | 1471-0048 |
ISSN | 1471-0048 ; 1471-003X |
DOI | 10.1038/s41583-021-00526-9 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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