Anoctamin 1 Contributes to Inflammatory and Nerve-Injury Induced Hypersensitivity

Background: Various pathological conditions such as inflammation or injury can evoke pain hypersensitivity. That represents the response to innocuous stimuli or exaggerated response to noxious stimuli. The molecular mechanism based on the pain hypersensitivity is associated with changes in many of i...

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Veröffentlicht in:Molecular pain 2014-01, Vol.10 (1), p.5-5
Hauptverfasser: Lee, Byeongjun, Cho, Hawon, Jung, Jooyoung, Yang, Young Duk, Yang, Dong-Jin, Oh, Uhtaek
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container_issue 1
container_start_page 5
container_title Molecular pain
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creator Lee, Byeongjun
Cho, Hawon
Jung, Jooyoung
Yang, Young Duk
Yang, Dong-Jin
Oh, Uhtaek
description Background: Various pathological conditions such as inflammation or injury can evoke pain hypersensitivity. That represents the response to innocuous stimuli or exaggerated response to noxious stimuli. The molecular mechanism based on the pain hypersensitivity is associated with changes in many of ion channels in dorsal-root ganglion (DRG) neurons. Anoctamin 1 (ANO1/TMEM16A), a Ca2+ activated chloride channel is highly visible in small DRG neurons and responds to heat. Mice with an abolished function of ANO1 in DRG neurons demonstrated attenuated pain-like behaviors when exposed to noxious heat, suggesting a role in acute thermal nociception. In this study, we further examined the function of ANO1 in mediating inflammation- or injury-induced hyperalgesia or allodynia. Results: Using Advillin/Ano1fl/fl (Adv/Ano1fl/fl) mice that have a functional ablation of Ano1 mainly in DRG neurons, we were able to determine its role in mediating thermal hyperalgesia and mechanical allodynia induced by inflammation or nerve injury. The thermal hyperalgesia and mechanical allodynia induced by carrageenan injection and spared-nerve injury were significantly reduced in Adv/Ano1fl/fl mice. In addition, flinching or licking behavior after bradykinin or formalin injection was also significantly reduced in Adv/Ano1fl/fl mice. Since pathological conditions augment nociceptive behaviors, we expected ANO1's contribution to the excitability of DRG neurons. Indeed, the application of inflammatory mediators reduced the threshold for action potential (rheobase) or time for induction of the first action potential in DRG neurons isolated from control (Ano1fl/fl) mice. These parameters for neuronal excitability induced by inflammatory mediators were not changed in Adv/Ano1fl/fl mice, suggesting an active contribution of ANO1 in augmenting the neuronal excitability. Conclusions: In addition to ANO1's role in mediating acute thermal pain as a heat sensor, ANO1 is also capable of augmenting the excitability of DRG neurons under inflammatory or neuropathic conditions and thereby aggravates inflammation- or tissue injury-induced pathological pain.
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That represents the response to innocuous stimuli or exaggerated response to noxious stimuli. The molecular mechanism based on the pain hypersensitivity is associated with changes in many of ion channels in dorsal-root ganglion (DRG) neurons. Anoctamin 1 (ANO1/TMEM16A), a Ca2+ activated chloride channel is highly visible in small DRG neurons and responds to heat. Mice with an abolished function of ANO1 in DRG neurons demonstrated attenuated pain-like behaviors when exposed to noxious heat, suggesting a role in acute thermal nociception. In this study, we further examined the function of ANO1 in mediating inflammation- or injury-induced hyperalgesia or allodynia. Results: Using Advillin/Ano1fl/fl (Adv/Ano1fl/fl) mice that have a functional ablation of Ano1 mainly in DRG neurons, we were able to determine its role in mediating thermal hyperalgesia and mechanical allodynia induced by inflammation or nerve injury. The thermal hyperalgesia and mechanical allodynia induced by carrageenan injection and spared-nerve injury were significantly reduced in Adv/Ano1fl/fl mice. In addition, flinching or licking behavior after bradykinin or formalin injection was also significantly reduced in Adv/Ano1fl/fl mice. Since pathological conditions augment nociceptive behaviors, we expected ANO1's contribution to the excitability of DRG neurons. Indeed, the application of inflammatory mediators reduced the threshold for action potential (rheobase) or time for induction of the first action potential in DRG neurons isolated from control (Ano1fl/fl) mice. These parameters for neuronal excitability induced by inflammatory mediators were not changed in Adv/Ano1fl/fl mice, suggesting an active contribution of ANO1 in augmenting the neuronal excitability. Conclusions: In addition to ANO1's role in mediating acute thermal pain as a heat sensor, ANO1 is also capable of augmenting the excitability of DRG neurons under inflammatory or neuropathic conditions and thereby aggravates inflammation- or tissue injury-induced pathological pain.</description><identifier>ISSN: 1744-8069</identifier><identifier>EISSN: 1744-8069</identifier><identifier>DOI: 10.1186/1744-8069-10-5</identifier><identifier>PMID: 24450308</identifier><language>eng</language><publisher>Los Angeles, CA: SAGE Publications</publisher><subject>Action potential ; Animals ; Anoctamin-1 ; Behavior ; Body temperature ; Bradykinin ; Bradykinin - pharmacology ; Calcium chloride ; Chloride Channels - metabolism ; Colleges &amp; universities ; Excitability ; Experiments ; Formaldehyde - pharmacology ; Gene Expression Regulation - drug effects ; Heat ; Hyperalgesia ; Hyperalgesia - etiology ; Hyperalgesia - genetics ; Hyperalgesia - pathology ; Hypersensitivity ; Hypersensitivity - etiology ; Hypersensitivity - genetics ; Hypersensitivity - pathology ; Inflammation ; Inflammation - complications ; Inflammation - genetics ; Inflammation - pathology ; Ion channels ; Laboratory animals ; Licking behavior ; Mice ; Mice, Knockout ; Molecular modelling ; Neurons ; Nociception - drug effects ; Organ Specificity - drug effects ; Pain ; Pain perception ; Pharmaceutical sciences ; Pharmacy ; RNA, Messenger - genetics ; RNA, Messenger - metabolism ; Sciatic Nerve - drug effects ; Sciatic Nerve - injuries ; Sciatic Nerve - metabolism ; Sciatic Nerve - pathology</subject><ispartof>Molecular pain, 2014-01, Vol.10 (1), p.5-5</ispartof><rights>2014 Lee et al</rights><rights>2014 Lee et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.</rights><rights>2014 Lee et al. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/2.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>Copyright © 2014 Lee et al.; licensee BioMed Central Ltd. 2014 Lee et al.; licensee BioMed Central Ltd.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-b639t-2e98151780544a62e6e9d8de3f4695714abb493e2f3ac74719e6730e4a8726913</citedby><cites>FETCH-LOGICAL-b639t-2e98151780544a62e6e9d8de3f4695714abb493e2f3ac74719e6730e4a8726913</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929161/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929161/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,881,21945,27830,27901,27902,44921,45309,53766,53768</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24450308$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lee, Byeongjun</creatorcontrib><creatorcontrib>Cho, Hawon</creatorcontrib><creatorcontrib>Jung, Jooyoung</creatorcontrib><creatorcontrib>Yang, Young Duk</creatorcontrib><creatorcontrib>Yang, Dong-Jin</creatorcontrib><creatorcontrib>Oh, Uhtaek</creatorcontrib><title>Anoctamin 1 Contributes to Inflammatory and Nerve-Injury Induced Hypersensitivity</title><title>Molecular pain</title><addtitle>Mol Pain</addtitle><description>Background: Various pathological conditions such as inflammation or injury can evoke pain hypersensitivity. That represents the response to innocuous stimuli or exaggerated response to noxious stimuli. The molecular mechanism based on the pain hypersensitivity is associated with changes in many of ion channels in dorsal-root ganglion (DRG) neurons. Anoctamin 1 (ANO1/TMEM16A), a Ca2+ activated chloride channel is highly visible in small DRG neurons and responds to heat. Mice with an abolished function of ANO1 in DRG neurons demonstrated attenuated pain-like behaviors when exposed to noxious heat, suggesting a role in acute thermal nociception. In this study, we further examined the function of ANO1 in mediating inflammation- or injury-induced hyperalgesia or allodynia. Results: Using Advillin/Ano1fl/fl (Adv/Ano1fl/fl) mice that have a functional ablation of Ano1 mainly in DRG neurons, we were able to determine its role in mediating thermal hyperalgesia and mechanical allodynia induced by inflammation or nerve injury. The thermal hyperalgesia and mechanical allodynia induced by carrageenan injection and spared-nerve injury were significantly reduced in Adv/Ano1fl/fl mice. In addition, flinching or licking behavior after bradykinin or formalin injection was also significantly reduced in Adv/Ano1fl/fl mice. Since pathological conditions augment nociceptive behaviors, we expected ANO1's contribution to the excitability of DRG neurons. Indeed, the application of inflammatory mediators reduced the threshold for action potential (rheobase) or time for induction of the first action potential in DRG neurons isolated from control (Ano1fl/fl) mice. These parameters for neuronal excitability induced by inflammatory mediators were not changed in Adv/Ano1fl/fl mice, suggesting an active contribution of ANO1 in augmenting the neuronal excitability. Conclusions: In addition to ANO1's role in mediating acute thermal pain as a heat sensor, ANO1 is also capable of augmenting the excitability of DRG neurons under inflammatory or neuropathic conditions and thereby aggravates inflammation- or tissue injury-induced pathological pain.</description><subject>Action potential</subject><subject>Animals</subject><subject>Anoctamin-1</subject><subject>Behavior</subject><subject>Body temperature</subject><subject>Bradykinin</subject><subject>Bradykinin - pharmacology</subject><subject>Calcium chloride</subject><subject>Chloride Channels - metabolism</subject><subject>Colleges &amp; universities</subject><subject>Excitability</subject><subject>Experiments</subject><subject>Formaldehyde - pharmacology</subject><subject>Gene Expression Regulation - drug effects</subject><subject>Heat</subject><subject>Hyperalgesia</subject><subject>Hyperalgesia - etiology</subject><subject>Hyperalgesia - genetics</subject><subject>Hyperalgesia - pathology</subject><subject>Hypersensitivity</subject><subject>Hypersensitivity - etiology</subject><subject>Hypersensitivity - genetics</subject><subject>Hypersensitivity - pathology</subject><subject>Inflammation</subject><subject>Inflammation - complications</subject><subject>Inflammation - genetics</subject><subject>Inflammation - pathology</subject><subject>Ion channels</subject><subject>Laboratory animals</subject><subject>Licking behavior</subject><subject>Mice</subject><subject>Mice, Knockout</subject><subject>Molecular modelling</subject><subject>Neurons</subject><subject>Nociception - drug effects</subject><subject>Organ Specificity - drug effects</subject><subject>Pain</subject><subject>Pain perception</subject><subject>Pharmaceutical sciences</subject><subject>Pharmacy</subject><subject>RNA, Messenger - genetics</subject><subject>RNA, Messenger - metabolism</subject><subject>Sciatic Nerve - drug effects</subject><subject>Sciatic Nerve - injuries</subject><subject>Sciatic Nerve - metabolism</subject><subject>Sciatic Nerve - pathology</subject><issn>1744-8069</issn><issn>1744-8069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>AFRWT</sourceid><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNp9kktr3DAURkVpaNK02y6LoZtAcSJZL2tTGIY2GQgJhXYtZPs61WBLU0kemH9fmUmHSfpYSegejj4-LkLvCL4kpBZXRDJW1liokuCSv0Bnh4eXR_dT9DrGNcZUYkFeodOKMY4prs_Q14XzbTKjdQUplt6lYJspQSySL1auH8w4muTDrjCuK-4gbKFcufWUH1aum1roipvdBkIEF22yW5t2b9BJb4YIbx_Pc_T9y-dvy5vy9v56tVzclo2gKpUVqJpwImvMGTOiAgGqqzugPROKS8JM0zBFoeqpaSWTRIGQFAMztayEIvQcfdp7N1MzQtdCzm4GvQl2NGGnvbH66cTZH_rBbzVVlSJiFiz2gsb6fwieTlo_6rlSPVeqCdY8Oy4eQwT_c4KY9GhjC8NgHPgpasIxp7QWWGX0wzN07afgckW6UphLToRg_6OyC_PcHZupyz3VBh9jgP6QOqea9-LPnO-PyzrgvxchAx_3QDQPcPTn33W_AMRuv38</recordid><startdate>20140123</startdate><enddate>20140123</enddate><creator>Lee, Byeongjun</creator><creator>Cho, Hawon</creator><creator>Jung, Jooyoung</creator><creator>Yang, Young Duk</creator><creator>Yang, Dong-Jin</creator><creator>Oh, Uhtaek</creator><general>SAGE Publications</general><general>Sage Publications Ltd</general><general>BioMed Central Ltd</general><general>BioMed Central</general><scope>AFRWT</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TK</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>K9.</scope><scope>M0S</scope><scope>M1P</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7T5</scope><scope>H94</scope><scope>5PM</scope></search><sort><creationdate>20140123</creationdate><title>Anoctamin 1 Contributes to Inflammatory and Nerve-Injury Induced Hypersensitivity</title><author>Lee, Byeongjun ; Cho, Hawon ; Jung, Jooyoung ; Yang, Young Duk ; Yang, Dong-Jin ; Oh, Uhtaek</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-b639t-2e98151780544a62e6e9d8de3f4695714abb493e2f3ac74719e6730e4a8726913</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Action potential</topic><topic>Animals</topic><topic>Anoctamin-1</topic><topic>Behavior</topic><topic>Body temperature</topic><topic>Bradykinin</topic><topic>Bradykinin - pharmacology</topic><topic>Calcium chloride</topic><topic>Chloride Channels - metabolism</topic><topic>Colleges &amp; universities</topic><topic>Excitability</topic><topic>Experiments</topic><topic>Formaldehyde - pharmacology</topic><topic>Gene Expression Regulation - drug effects</topic><topic>Heat</topic><topic>Hyperalgesia</topic><topic>Hyperalgesia - etiology</topic><topic>Hyperalgesia - genetics</topic><topic>Hyperalgesia - pathology</topic><topic>Hypersensitivity</topic><topic>Hypersensitivity - etiology</topic><topic>Hypersensitivity - genetics</topic><topic>Hypersensitivity - pathology</topic><topic>Inflammation</topic><topic>Inflammation - complications</topic><topic>Inflammation - genetics</topic><topic>Inflammation - pathology</topic><topic>Ion channels</topic><topic>Laboratory animals</topic><topic>Licking behavior</topic><topic>Mice</topic><topic>Mice, Knockout</topic><topic>Molecular modelling</topic><topic>Neurons</topic><topic>Nociception - drug effects</topic><topic>Organ Specificity - drug effects</topic><topic>Pain</topic><topic>Pain perception</topic><topic>Pharmaceutical sciences</topic><topic>Pharmacy</topic><topic>RNA, Messenger - genetics</topic><topic>RNA, Messenger - metabolism</topic><topic>Sciatic Nerve - drug effects</topic><topic>Sciatic Nerve - injuries</topic><topic>Sciatic Nerve - metabolism</topic><topic>Sciatic Nerve - pathology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lee, Byeongjun</creatorcontrib><creatorcontrib>Cho, Hawon</creatorcontrib><creatorcontrib>Jung, Jooyoung</creatorcontrib><creatorcontrib>Yang, Young Duk</creatorcontrib><creatorcontrib>Yang, Dong-Jin</creatorcontrib><creatorcontrib>Oh, Uhtaek</creatorcontrib><collection>Sage Journals GOLD Open Access 2024</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Neurosciences Abstracts</collection><collection>Health &amp; 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That represents the response to innocuous stimuli or exaggerated response to noxious stimuli. The molecular mechanism based on the pain hypersensitivity is associated with changes in many of ion channels in dorsal-root ganglion (DRG) neurons. Anoctamin 1 (ANO1/TMEM16A), a Ca2+ activated chloride channel is highly visible in small DRG neurons and responds to heat. Mice with an abolished function of ANO1 in DRG neurons demonstrated attenuated pain-like behaviors when exposed to noxious heat, suggesting a role in acute thermal nociception. In this study, we further examined the function of ANO1 in mediating inflammation- or injury-induced hyperalgesia or allodynia. Results: Using Advillin/Ano1fl/fl (Adv/Ano1fl/fl) mice that have a functional ablation of Ano1 mainly in DRG neurons, we were able to determine its role in mediating thermal hyperalgesia and mechanical allodynia induced by inflammation or nerve injury. The thermal hyperalgesia and mechanical allodynia induced by carrageenan injection and spared-nerve injury were significantly reduced in Adv/Ano1fl/fl mice. In addition, flinching or licking behavior after bradykinin or formalin injection was also significantly reduced in Adv/Ano1fl/fl mice. Since pathological conditions augment nociceptive behaviors, we expected ANO1's contribution to the excitability of DRG neurons. Indeed, the application of inflammatory mediators reduced the threshold for action potential (rheobase) or time for induction of the first action potential in DRG neurons isolated from control (Ano1fl/fl) mice. These parameters for neuronal excitability induced by inflammatory mediators were not changed in Adv/Ano1fl/fl mice, suggesting an active contribution of ANO1 in augmenting the neuronal excitability. Conclusions: In addition to ANO1's role in mediating acute thermal pain as a heat sensor, ANO1 is also capable of augmenting the excitability of DRG neurons under inflammatory or neuropathic conditions and thereby aggravates inflammation- or tissue injury-induced pathological pain.</abstract><cop>Los Angeles, CA</cop><pub>SAGE Publications</pub><pmid>24450308</pmid><doi>10.1186/1744-8069-10-5</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record>
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subjects Action potential
Animals
Anoctamin-1
Behavior
Body temperature
Bradykinin
Bradykinin - pharmacology
Calcium chloride
Chloride Channels - metabolism
Colleges & universities
Excitability
Experiments
Formaldehyde - pharmacology
Gene Expression Regulation - drug effects
Heat
Hyperalgesia
Hyperalgesia - etiology
Hyperalgesia - genetics
Hyperalgesia - pathology
Hypersensitivity
Hypersensitivity - etiology
Hypersensitivity - genetics
Hypersensitivity - pathology
Inflammation
Inflammation - complications
Inflammation - genetics
Inflammation - pathology
Ion channels
Laboratory animals
Licking behavior
Mice
Mice, Knockout
Molecular modelling
Neurons
Nociception - drug effects
Organ Specificity - drug effects
Pain
Pain perception
Pharmaceutical sciences
Pharmacy
RNA, Messenger - genetics
RNA, Messenger - metabolism
Sciatic Nerve - drug effects
Sciatic Nerve - injuries
Sciatic Nerve - metabolism
Sciatic Nerve - pathology
title Anoctamin 1 Contributes to Inflammatory and Nerve-Injury Induced Hypersensitivity
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