Abstract:
:Stimuli that elicit itch are detected by sensory neurons that innervate the skin. This information is processed by the spinal cord; however, the way in which this occurs is still poorly understood. Here we investigated the neuronal pathways for itch neurotransmission, particularly the contribution of the neuropeptide somatostatin. We find that in the periphery, somatostatin is exclusively expressed in Nppb+ neurons, and we demonstrate that Nppb+somatostatin+ cells function as pruriceptors. Employing chemogenetics, pharmacology and cell-specific ablation methods, we demonstrate that somatostatin potentiates itch by inhibiting inhibitory dynorphin neurons, which results in disinhibition of GRPR+ neurons. Furthermore, elimination of somatostatin from primary afferents and/or from spinal interneurons demonstrates differential involvement of the peptide released from these sources in itch and pain. Our results define the neural circuit underlying somatostatin-induced itch and characterize a contrasting antinociceptive role for the peptide.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Huang J,Polgár E,Solinski HJ,Mishra SK,Tseng PY,Iwagaki N,Boyle KA,Dickie AC,Kriegbaum MC,Wildner H,Zeilhofer HU,Watanabe M,Riddell JS,Todd AJ,Hoon MAdoi
10.1038/s41593-018-0119-zsubject
Has Abstractpub_date
2018-05-01 00:00:00pages
707-716issue
5eissn
1097-6256issn
1546-1726pii
10.1038/s41593-018-0119-zjournal_volume
21pub_type
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