Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Universitário da Ânima (RUNA) |
Texto Completo: | https://repositorio.animaeducacao.com.br/handle/ANIMA/3052 |
Resumo: | Although the effects of electroacupuncture (EA) on pain and inflammation are similar to the activation effects of formyl peptide receptor 2 (FPR2/ALXR) mediated by pro-resolving substances, the involvement of this receptor in the antihyperalgesic effect of EA had not yet been investigated. Objective: To evaluate the involvement of the peripheral and spinal FPR2/ALXR receptor in the antihyperalgesic effect induced by low-frequency EA in an animal model of persistent peripheral inflammation. Methods: Swiss male mice (30 to 40 g) underwent intraplantar (i.pl.) injection with complete Freund's adjuvant (CFA). Mechanical hyperalgesia was assessed by the von Frey test. The animals were treated with EA (in SP6 and ST36 acupoints) or BML-111 (an analog of lipoxin A4 [LXA4]) for 5 consecutive days. In the analysis of the mechanism of action the mice were treated on the first and fifth day. The edema was evaluated on the fourth day after CFA by measuring the thickness of the paw. Intraplantar (i.pl.) and intrathecal (i.t.) administration of the FPR2/ALXR receptor antagonist (WRW4) or naloxone were performed on the first and fifth day after CFA. Expression of the FPR2/ALXR receptor in the paw and spinal cord was performed on the second day after CFA by the Western Blotting technique. Results: EA and BML-111 reduced mechanical hyperalgesia. Daily treatment for 4 consecutive days with EA or BML-111 did not reduce paw edema. The i.pl. or i.t. pre-treatment of animals with WRW4 or naloxone prevented the antihyperalgesic effect induced by EA or BML-111. The CFA i.pl. injection increased FPR2/ALXR receptor expression in the paw, but not in the spinal cord. Treatment of animals with EA or BML-111 did not alter FPR2/ALXR receptor expression in the paw or spinal cord, although animals treated with EA or BML-111 when pretreated with WRW4 had lower FPR2/ALXR receptor expression in the spinal cord. However, lower expression of the FPR2/ALXR receptor in the paw was evidenced only in animals pretreated with WRW4 that received EA treatment. Conclusion: Treatment with EA or BML-111 reduced mechanical hyperalgesia, but not edema, and this effect might be mediated by activation of peripheral and central FPR2/ALXR receptor. |
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Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupunturaThe role of peripheral and spinal FPR2/ALXR receptor in electroacupuncture-induced analgesia in an animal model of persistent inflammatory painInflamação crônicaMedicina integrativaMediadores pró-resolutivosAlthough the effects of electroacupuncture (EA) on pain and inflammation are similar to the activation effects of formyl peptide receptor 2 (FPR2/ALXR) mediated by pro-resolving substances, the involvement of this receptor in the antihyperalgesic effect of EA had not yet been investigated. Objective: To evaluate the involvement of the peripheral and spinal FPR2/ALXR receptor in the antihyperalgesic effect induced by low-frequency EA in an animal model of persistent peripheral inflammation. Methods: Swiss male mice (30 to 40 g) underwent intraplantar (i.pl.) injection with complete Freund's adjuvant (CFA). Mechanical hyperalgesia was assessed by the von Frey test. The animals were treated with EA (in SP6 and ST36 acupoints) or BML-111 (an analog of lipoxin A4 [LXA4]) for 5 consecutive days. In the analysis of the mechanism of action the mice were treated on the first and fifth day. The edema was evaluated on the fourth day after CFA by measuring the thickness of the paw. Intraplantar (i.pl.) and intrathecal (i.t.) administration of the FPR2/ALXR receptor antagonist (WRW4) or naloxone were performed on the first and fifth day after CFA. Expression of the FPR2/ALXR receptor in the paw and spinal cord was performed on the second day after CFA by the Western Blotting technique. Results: EA and BML-111 reduced mechanical hyperalgesia. Daily treatment for 4 consecutive days with EA or BML-111 did not reduce paw edema. The i.pl. or i.t. pre-treatment of animals with WRW4 or naloxone prevented the antihyperalgesic effect induced by EA or BML-111. The CFA i.pl. injection increased FPR2/ALXR receptor expression in the paw, but not in the spinal cord. Treatment of animals with EA or BML-111 did not alter FPR2/ALXR receptor expression in the paw or spinal cord, although animals treated with EA or BML-111 when pretreated with WRW4 had lower FPR2/ALXR receptor expression in the spinal cord. However, lower expression of the FPR2/ALXR receptor in the paw was evidenced only in animals pretreated with WRW4 that received EA treatment. Conclusion: Treatment with EA or BML-111 reduced mechanical hyperalgesia, but not edema, and this effect might be mediated by activation of peripheral and central FPR2/ALXR receptor.Apesar dos efeitos analgésicos da eletroacupuntura (EA) na dor e inflamação serem semelhantes aos efeitos da ativação do receptor 2 para peptídeos formilados (FPR2/ALX) mediada por substâncias pró-resolutivas, o envolvimento deste receptor no efeito anti-hiperalgésico da EA ainda não tinha sido investigado. Objetivo: Avaliar o envolvimento do receptor FPR2/ALX periférico e espinal no efeito anti-hiperalgésico induzido pela EA de baixa frequência em um modelo animal de inflamação periférica persistente. Métodos: Camundongos machos Suíços (30 a 40 g) foram submetidos a injeção intraplantar (i.pl.) de 20 μl adjuvante complete de Freund (CFA). A hiperalgesia mecânica foi avaliada pelo teste de von Frey. Os animais foram tratados com EA (nos acupontos SP6 e ST36) ou BML-111 nas doses 100 µl / animal: testados 0,3, 1 e 3 μg (um análogo da lipoxina A4 [LXA4]) por 5 dias consecutivos. Na análise do mecanismo de ação os camundongos foram tratados no primeiro e no quinto dia. O edema foi avaliado no quarto dia após CFA por meio da mensuração da espessura da pata. Administração i.pl. e intratecal (i.t.) do antagonista para o receptor FPR2/ALX (WRW4 nas doses de 3 ou 10 μg/i.pl) ou de naloxona foram realizadas no primeiro e quinto dia após CFA. A expressão do receptor FPR2/ALX na pata e na medula espinal foi realizada no segundo dia após CFA por meio da técnica de Western Blotting. Resultados: EA e BML-111 reduziram a hiperalgesia mecânica. O tratamento diário por 4 dias consecutivos com EA ou BML-111 não reduziram o edema de pata. O pré-tratamento i.pl. ou i.t. dos animais com WRW4 ou naloxona preveniram o efeito anti-hiperalgésico induzido pela EA ou BML-111. A injeção de CFA aumentou a expressão do receptor FPR2/ALX na pata, mas não na medula espinal. O tratamento dos animais com EA ou BML-111 não alterou a expressão do receptor FPR2/ALX na pata ou medula espinal, embora os animais tratados com EA ou BML-111 quando pré-tratados com WRW4 apresentaram menor expressão do receptor FPR2/ALX na medula espinal. No entanto, menor expressão do receptor FPR2/ALX na pata foi evidenciada somente nos animais pré-tratados com WRW4 que receberam EA. Conclusão: O tratamento com EA ou BML-111 reduziram a hiperalgesia mecânica, mas não o edema, e este efeito pode ser dependente da ativação do receptor FPR2/ALX periférico e central.Martins, Daniel FernandesCaron, Cintia Vieira2018-09-19T10:59:57Z2020-11-26T20:52:55Z2018-09-19T10:59:57Z2020-11-26T20:52:55Z2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis101 f.application/pdfhttps://repositorio.animaeducacao.com.br/handle/ANIMA/3052Programa de Pós-Graduação em Ciência da SaúdePalhoça/ SCAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessporreponame:Repositório Universitário da Ânima (RUNA)instname:Ânima Educaçãoinstacron:Ânima2020-12-01T16:47:17Zoai:repositorio.animaeducacao.com.br:ANIMA/3052Repositório InstitucionalPRIhttps://repositorio.animaeducacao.com.br/oai/requestcontato@animaeducacao.com.bropendoar:2020-12-01T16:47:17Repositório Universitário da Ânima (RUNA) - Ânima Educaçãofalse |
dc.title.none.fl_str_mv |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura The role of peripheral and spinal FPR2/ALXR receptor in electroacupuncture-induced analgesia in an animal model of persistent inflammatory pain |
title |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura |
spellingShingle |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura Caron, Cintia Vieira Inflamação crônica Medicina integrativa Mediadores pró-resolutivos |
title_short |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura |
title_full |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura |
title_fullStr |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura |
title_full_unstemmed |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura |
title_sort |
Avaliação do envolvimento do receptor FPR2/ALXR periférico e espinal no efeito anti-hiperalgésico induzido pela eletroacupuntura |
author |
Caron, Cintia Vieira |
author_facet |
Caron, Cintia Vieira |
author_role |
author |
dc.contributor.none.fl_str_mv |
Martins, Daniel Fernandes |
dc.contributor.author.fl_str_mv |
Caron, Cintia Vieira |
dc.subject.por.fl_str_mv |
Inflamação crônica Medicina integrativa Mediadores pró-resolutivos |
topic |
Inflamação crônica Medicina integrativa Mediadores pró-resolutivos |
description |
Although the effects of electroacupuncture (EA) on pain and inflammation are similar to the activation effects of formyl peptide receptor 2 (FPR2/ALXR) mediated by pro-resolving substances, the involvement of this receptor in the antihyperalgesic effect of EA had not yet been investigated. Objective: To evaluate the involvement of the peripheral and spinal FPR2/ALXR receptor in the antihyperalgesic effect induced by low-frequency EA in an animal model of persistent peripheral inflammation. Methods: Swiss male mice (30 to 40 g) underwent intraplantar (i.pl.) injection with complete Freund's adjuvant (CFA). Mechanical hyperalgesia was assessed by the von Frey test. The animals were treated with EA (in SP6 and ST36 acupoints) or BML-111 (an analog of lipoxin A4 [LXA4]) for 5 consecutive days. In the analysis of the mechanism of action the mice were treated on the first and fifth day. The edema was evaluated on the fourth day after CFA by measuring the thickness of the paw. Intraplantar (i.pl.) and intrathecal (i.t.) administration of the FPR2/ALXR receptor antagonist (WRW4) or naloxone were performed on the first and fifth day after CFA. Expression of the FPR2/ALXR receptor in the paw and spinal cord was performed on the second day after CFA by the Western Blotting technique. Results: EA and BML-111 reduced mechanical hyperalgesia. Daily treatment for 4 consecutive days with EA or BML-111 did not reduce paw edema. The i.pl. or i.t. pre-treatment of animals with WRW4 or naloxone prevented the antihyperalgesic effect induced by EA or BML-111. The CFA i.pl. injection increased FPR2/ALXR receptor expression in the paw, but not in the spinal cord. Treatment of animals with EA or BML-111 did not alter FPR2/ALXR receptor expression in the paw or spinal cord, although animals treated with EA or BML-111 when pretreated with WRW4 had lower FPR2/ALXR receptor expression in the spinal cord. However, lower expression of the FPR2/ALXR receptor in the paw was evidenced only in animals pretreated with WRW4 that received EA treatment. Conclusion: Treatment with EA or BML-111 reduced mechanical hyperalgesia, but not edema, and this effect might be mediated by activation of peripheral and central FPR2/ALXR receptor. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-09-19T10:59:57Z 2018-09-19T10:59:57Z 2018 2020-11-26T20:52:55Z 2020-11-26T20:52:55Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.animaeducacao.com.br/handle/ANIMA/3052 |
url |
https://repositorio.animaeducacao.com.br/handle/ANIMA/3052 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Programa de Pós-Graduação em Ciência da Saúde |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
101 f. application/pdf |
dc.coverage.none.fl_str_mv |
Palhoça/ SC |
dc.source.none.fl_str_mv |
reponame:Repositório Universitário da Ânima (RUNA) instname:Ânima Educação instacron:Ânima |
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Ânima Educação |
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Ânima |
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Ânima |
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Repositório Universitário da Ânima (RUNA) |
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Repositório Universitário da Ânima (RUNA) |
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Repositório Universitário da Ânima (RUNA) - Ânima Educação |
repository.mail.fl_str_mv |
contato@animaeducacao.com.br |
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1767415839381782528 |