Cargando…
The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord
A cGMP signaling cascade composed of C-type natriuretic peptide, the guanylyl cyclase receptor Npr2 and cGMP-dependent protein kinase I (cGKI) controls the bifurcation of sensory axons upon entering the spinal cord during embryonic development. However, the impact of axon bifurcation on sensory proc...
Autores principales: | , , , , , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5809486/ https://www.ncbi.nlm.nih.gov/pubmed/29472841 http://dx.doi.org/10.3389/fnmol.2018.00019 |
_version_ | 1783299570139136000 |
---|---|
author | Tröster, Philip Haseleu, Julia Petersen, Jonas Drees, Oliver Schmidtko, Achim Schwaller, Frederick Lewin, Gary R. Ter-Avetisyan, Gohar Winter, York Peters, Stefanie Feil, Susanne Feil, Robert Rathjen, Fritz G. Schmidt, Hannes |
author_facet | Tröster, Philip Haseleu, Julia Petersen, Jonas Drees, Oliver Schmidtko, Achim Schwaller, Frederick Lewin, Gary R. Ter-Avetisyan, Gohar Winter, York Peters, Stefanie Feil, Susanne Feil, Robert Rathjen, Fritz G. Schmidt, Hannes |
author_sort | Tröster, Philip |
collection | PubMed |
description | A cGMP signaling cascade composed of C-type natriuretic peptide, the guanylyl cyclase receptor Npr2 and cGMP-dependent protein kinase I (cGKI) controls the bifurcation of sensory axons upon entering the spinal cord during embryonic development. However, the impact of axon bifurcation on sensory processing in adulthood remains poorly understood. To investigate the functional consequences of impaired axon bifurcation during adult stages we generated conditional mouse mutants of Npr2 and cGKI (Npr2(fl/fl);Wnt1(Cre) and cGKI(KO/fl);Wnt1(Cre)) that lack sensory axon bifurcation in the absence of additional phenotypes observed in the global knockout mice. Cholera toxin labeling in digits of the hind paw demonstrated an altered shape of sensory neuron termination fields in the spinal cord of conditional Npr2 mouse mutants. Behavioral testing of both sexes indicated that noxious heat sensation and nociception induced by chemical irritants are impaired in the mutants, whereas responses to cold sensation, mechanical stimulation, and motor coordination are not affected. Recordings from C-fiber nociceptors in the hind limb skin showed that Npr2 function was not required to maintain normal heat sensitivity of peripheral nociceptors. Thus, the altered behavioral responses to noxious heat found in Npr2(fl/fl);Wnt1(Cre) mice is not due to an impaired C-fiber function. Overall, these data point to a critical role of axonal bifurcation for the processing of pain induced by heat or chemical stimuli. |
format | Online Article Text |
id | pubmed-5809486 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-58094862018-02-22 The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord Tröster, Philip Haseleu, Julia Petersen, Jonas Drees, Oliver Schmidtko, Achim Schwaller, Frederick Lewin, Gary R. Ter-Avetisyan, Gohar Winter, York Peters, Stefanie Feil, Susanne Feil, Robert Rathjen, Fritz G. Schmidt, Hannes Front Mol Neurosci Neuroscience A cGMP signaling cascade composed of C-type natriuretic peptide, the guanylyl cyclase receptor Npr2 and cGMP-dependent protein kinase I (cGKI) controls the bifurcation of sensory axons upon entering the spinal cord during embryonic development. However, the impact of axon bifurcation on sensory processing in adulthood remains poorly understood. To investigate the functional consequences of impaired axon bifurcation during adult stages we generated conditional mouse mutants of Npr2 and cGKI (Npr2(fl/fl);Wnt1(Cre) and cGKI(KO/fl);Wnt1(Cre)) that lack sensory axon bifurcation in the absence of additional phenotypes observed in the global knockout mice. Cholera toxin labeling in digits of the hind paw demonstrated an altered shape of sensory neuron termination fields in the spinal cord of conditional Npr2 mouse mutants. Behavioral testing of both sexes indicated that noxious heat sensation and nociception induced by chemical irritants are impaired in the mutants, whereas responses to cold sensation, mechanical stimulation, and motor coordination are not affected. Recordings from C-fiber nociceptors in the hind limb skin showed that Npr2 function was not required to maintain normal heat sensitivity of peripheral nociceptors. Thus, the altered behavioral responses to noxious heat found in Npr2(fl/fl);Wnt1(Cre) mice is not due to an impaired C-fiber function. Overall, these data point to a critical role of axonal bifurcation for the processing of pain induced by heat or chemical stimuli. Frontiers Media S.A. 2018-02-08 /pmc/articles/PMC5809486/ /pubmed/29472841 http://dx.doi.org/10.3389/fnmol.2018.00019 Text en Copyright © 2018 Tröster, Haseleu, Petersen, Drees, Schmidtko, Schwaller, Lewin, Ter-Avetisyan, Winter, Peters, Feil, Feil, Rathjen and Schmidt. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Neuroscience Tröster, Philip Haseleu, Julia Petersen, Jonas Drees, Oliver Schmidtko, Achim Schwaller, Frederick Lewin, Gary R. Ter-Avetisyan, Gohar Winter, York Peters, Stefanie Feil, Susanne Feil, Robert Rathjen, Fritz G. Schmidt, Hannes The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord |
title | The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord |
title_full | The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord |
title_fullStr | The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord |
title_full_unstemmed | The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord |
title_short | The Absence of Sensory Axon Bifurcation Affects Nociception and Termination Fields of Afferents in the Spinal Cord |
title_sort | absence of sensory axon bifurcation affects nociception and termination fields of afferents in the spinal cord |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5809486/ https://www.ncbi.nlm.nih.gov/pubmed/29472841 http://dx.doi.org/10.3389/fnmol.2018.00019 |
work_keys_str_mv | AT trosterphilip theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT haseleujulia theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT petersenjonas theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT dreesoliver theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT schmidtkoachim theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT schwallerfrederick theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT lewingaryr theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT teravetisyangohar theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT winteryork theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT petersstefanie theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT feilsusanne theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT feilrobert theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT rathjenfritzg theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT schmidthannes theabsenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT trosterphilip absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT haseleujulia absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT petersenjonas absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT dreesoliver absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT schmidtkoachim absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT schwallerfrederick absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT lewingaryr absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT teravetisyangohar absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT winteryork absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT petersstefanie absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT feilsusanne absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT feilrobert absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT rathjenfritzg absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord AT schmidthannes absenceofsensoryaxonbifurcationaffectsnociceptionandterminationfieldsofafferentsinthespinalcord |