Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity
Abstract. Introduction:. Inhibitory neurons in the spinal dorsal horn can be classified based on expression of neurochemical marker genes. However, these marker genes are often expressed throughout the central nervous system, which poses challenges for manipulating genetically identified spinal neur...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wolters Kluwer
2021-08-01
|
Series: | PAIN Reports |
Online Access: | http://journals.lww.com/painrpts/fulltext/10.1097/PR9.0000000000000947 |
id |
doaj-4ff9a9b05ad142a7b633e00e5ecf19ca |
---|---|
record_format |
Article |
spelling |
doaj-4ff9a9b05ad142a7b633e00e5ecf19ca2021-07-26T05:44:33ZengWolters KluwerPAIN Reports2471-25312021-08-0162e94710.1097/PR9.0000000000000947202107000-00016Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivityElizabeth K. Serafin0Robert Burns1Judy Yoo2Mark L. Baccei3a Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, OH, USAa Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, OH, USAa Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, OH, USAa Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, OH, USAAbstract. Introduction:. Inhibitory neurons in the spinal dorsal horn can be classified based on expression of neurochemical marker genes. However, these marker genes are often expressed throughout the central nervous system, which poses challenges for manipulating genetically identified spinal neurons without undesired off-target effects. Objectives:. We investigated whether Gucy2d, previously identified as a highly selective marker of dynorphin-lineage neurons in the dorsal horn, is expressed in other locations within the adult mouse spinal cord, dorsal root ganglia (DRG), or brain. In addition, we sought to molecularly characterize Gucy2d-expressing dorsal horn neurons and investigate whether the disruption of Gucy2d gene expression affects sensitivity to itch or pain. Methods:. In situ hybridization experiments assessed Gucy2d mRNA expression in the adult mouse spinal cord, DRG, and brain, and its colocalization with Pax2, Bhlhb5, and Pde2a in dorsal horn neurons. Knockout mice lacking Gucy2d expression were compared with littermate controls to assess sensitivity to chloroquine-induced itch and dry skin-mediated chronic itch, as well as heat, cold, or mechanical stimuli. Results:. Gucy2d is selectively expressed in dynorphin-lineage neurons in lamina I-III of the adult mouse spinal cord but not in the brain or DRG. Spinal Gucy2d-expressing neurons are inhibitory neurons that also express the transcription factor Bhlhb5 and the cGMP-dependent phosphodiesterase Pde2a. Gucy2d knockout mice did not exhibit altered responses to itch or pain. Conclusions:. The selective expression of Gucy2d within a subpopulation of inhibitory dorsal horn neurons may yield a means to selectively manipulate inhibitory signaling at the level of the spinal cord without effects on the brain.http://journals.lww.com/painrpts/fulltext/10.1097/PR9.0000000000000947 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Elizabeth K. Serafin Robert Burns Judy Yoo Mark L. Baccei |
spellingShingle |
Elizabeth K. Serafin Robert Burns Judy Yoo Mark L. Baccei Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity PAIN Reports |
author_facet |
Elizabeth K. Serafin Robert Burns Judy Yoo Mark L. Baccei |
author_sort |
Elizabeth K. Serafin |
title |
Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity |
title_short |
Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity |
title_full |
Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity |
title_fullStr |
Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity |
title_full_unstemmed |
Gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity |
title_sort |
gucy2d selectively marks inhibitory dynorphin neurons in the spinal dorsal horn but is dispensable for pain and itch sensitivity |
publisher |
Wolters Kluwer |
series |
PAIN Reports |
issn |
2471-2531 |
publishDate |
2021-08-01 |
description |
Abstract. Introduction:. Inhibitory neurons in the spinal dorsal horn can be classified based on expression of neurochemical marker genes. However, these marker genes are often expressed throughout the central nervous system, which poses challenges for manipulating genetically identified spinal neurons without undesired off-target effects.
Objectives:. We investigated whether Gucy2d, previously identified as a highly selective marker of dynorphin-lineage neurons in the dorsal horn, is expressed in other locations within the adult mouse spinal cord, dorsal root ganglia (DRG), or brain. In addition, we sought to molecularly characterize Gucy2d-expressing dorsal horn neurons and investigate whether the disruption of Gucy2d gene expression affects sensitivity to itch or pain.
Methods:. In situ hybridization experiments assessed Gucy2d mRNA expression in the adult mouse spinal cord, DRG, and brain, and its colocalization with Pax2, Bhlhb5, and Pde2a in dorsal horn neurons. Knockout mice lacking Gucy2d expression were compared with littermate controls to assess sensitivity to chloroquine-induced itch and dry skin-mediated chronic itch, as well as heat, cold, or mechanical stimuli.
Results:. Gucy2d is selectively expressed in dynorphin-lineage neurons in lamina I-III of the adult mouse spinal cord but not in the brain or DRG. Spinal Gucy2d-expressing neurons are inhibitory neurons that also express the transcription factor Bhlhb5 and the cGMP-dependent phosphodiesterase Pde2a. Gucy2d knockout mice did not exhibit altered responses to itch or pain.
Conclusions:. The selective expression of Gucy2d within a subpopulation of inhibitory dorsal horn neurons may yield a means to selectively manipulate inhibitory signaling at the level of the spinal cord without effects on the brain. |
url |
http://journals.lww.com/painrpts/fulltext/10.1097/PR9.0000000000000947 |
work_keys_str_mv |
AT elizabethkserafin gucy2dselectivelymarksinhibitorydynorphinneuronsinthespinaldorsalhornbutisdispensableforpainanditchsensitivity AT robertburns gucy2dselectivelymarksinhibitorydynorphinneuronsinthespinaldorsalhornbutisdispensableforpainanditchsensitivity AT judyyoo gucy2dselectivelymarksinhibitorydynorphinneuronsinthespinaldorsalhornbutisdispensableforpainanditchsensitivity AT marklbaccei gucy2dselectivelymarksinhibitorydynorphinneuronsinthespinaldorsalhornbutisdispensableforpainanditchsensitivity |
_version_ |
1721282192087187456 |