Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFS |
Texto Completo: | https://ri.ufs.br/handle/riufs/3620 |
Resumo: | Changes in maternal thyroid hormones concentrations during pregnancy can affect the body development of pups. However, despite the recent race for the understanding of the mechanisms that explain the impact of perinatal life in the occurrence of different diseases, little has been done to investigate the role of maternal thyroid hormones for proper development of CNS structures, important in regulating perception nociceptive. In this sense, in the present study we investigate the effect of experimental gestational hypothyroidism (EGH) in biological systems of nociceptive circuitry. The EGH was induced by methimazole to 0.02% in drinking water from ninth day of gestation until delivery. The threshold for noxious temperature was evaluated by using the hot plate apparatus (52 ± 0.2 ° C) in male offspring from methimazole treated dams (OMTD) and offspring from water treated dams (OWTD), on postnatal day (PND) 60 days, in baseline condiction and after a drug injection (morphine, memantine, sertraline and AMPT). In addition, thyroid status was evaluated through the determination of total T3 and T4 serum levels on PND 60, sections through the vlPAG were processed for TH immunofluorescence, the contents of glutamate in the cerebrospinal fluid was measured and evaluated oxidative parameters in spinal cord. The results were expressed mean ± Standard Error values. Three and two way ANOVA, Student t test, Mann-Whitney and correlation test were used. The threshold of statistical significance was set at p<0.05. Thus, our data showed that EGH does not generate significant impact on the treated mothers when they are compared to control, but in the offspring important effects of lack of maternal THs in the intrauterine period were observed. OMTD had less body weight after 60 DPN (p <0.01), higher serum concentration of TT3 (p <0.05), higher analgesia on the hot plate after i.p. morphine, at times 30 and 60 minutes (time factor interaction and treatment (F (4, 80) = 2.50, p <0.05) and increased lipid peroxidation (assessed by quantification of TBARS) in the spinal cord (p <0.01 ). Given the above, we conclude that the lack of THs during pregnancy causes changes in body weight and serum concentrations of T3, as well as in biological systems of nociceptive circuitry. |
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Alves, Iura Gonzalez NogueiraSantana Filho, Valter Joviniano dehttp://lattes.cnpq.br/95457709071604352017-09-26T12:07:29Z2017-09-26T12:07:29Z2016-07-29ALVES, Iura Gonzalez Nogueira. Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos. 2016. 199 f. Tese (Pós-Graduação em Ciências da Saúde) - Universidade Federal de Sergipe, Aracaju, 2016.https://ri.ufs.br/handle/riufs/3620Changes in maternal thyroid hormones concentrations during pregnancy can affect the body development of pups. However, despite the recent race for the understanding of the mechanisms that explain the impact of perinatal life in the occurrence of different diseases, little has been done to investigate the role of maternal thyroid hormones for proper development of CNS structures, important in regulating perception nociceptive. In this sense, in the present study we investigate the effect of experimental gestational hypothyroidism (EGH) in biological systems of nociceptive circuitry. The EGH was induced by methimazole to 0.02% in drinking water from ninth day of gestation until delivery. The threshold for noxious temperature was evaluated by using the hot plate apparatus (52 ± 0.2 ° C) in male offspring from methimazole treated dams (OMTD) and offspring from water treated dams (OWTD), on postnatal day (PND) 60 days, in baseline condiction and after a drug injection (morphine, memantine, sertraline and AMPT). In addition, thyroid status was evaluated through the determination of total T3 and T4 serum levels on PND 60, sections through the vlPAG were processed for TH immunofluorescence, the contents of glutamate in the cerebrospinal fluid was measured and evaluated oxidative parameters in spinal cord. The results were expressed mean ± Standard Error values. Three and two way ANOVA, Student t test, Mann-Whitney and correlation test were used. The threshold of statistical significance was set at p<0.05. Thus, our data showed that EGH does not generate significant impact on the treated mothers when they are compared to control, but in the offspring important effects of lack of maternal THs in the intrauterine period were observed. OMTD had less body weight after 60 DPN (p <0.01), higher serum concentration of TT3 (p <0.05), higher analgesia on the hot plate after i.p. morphine, at times 30 and 60 minutes (time factor interaction and treatment (F (4, 80) = 2.50, p <0.05) and increased lipid peroxidation (assessed by quantification of TBARS) in the spinal cord (p <0.01 ). Given the above, we conclude that the lack of THs during pregnancy causes changes in body weight and serum concentrations of T3, as well as in biological systems of nociceptive circuitry.Alterações das concentrações de hormônios tireoideanos maternos durante a gestação podem afetar o adequado desenvolvimento dos filhotes. No entanto, apesar da corrida recente pela compreensão dos mecanismos que expliquem as repercussões da vida perinatal na ocorrência de distintas doenças, pouco se tem feito para investigar o papel dos hormônios tireoideanos maternos para o adequado desenvolvimento das estruturas do SNC, importantes na regulação da percepção nociceptiva. Nesse sentido, no presente estudo, procurou-se investigar as repercussões do hipotireoidismo gestacional (HGE) materno nos sistemas biológicos centrais de controle nociceptivo. O HGE foi induzido adicionando metimazol a 0,02% na água de beber a partir do nono dia de gestação até o parto. Os machos da prole de mães hipotireoideas (PMH) e eutireoideas (PME) foram submetidos à avaliação basal e após a injeção de drogas (morfina, memantina, sertralina e AMPT), do limiar nociceptivo com 60 dias pós-natal (DPN) por meio do aparato da placa quente (52±0,2 C). Ademais, foi realizada a dosagem da triiodotironina e tiroxina totais (TT3 e TT4, respectivamente) séricos, quantificação de neurônios da substância cinzenta periaquedutal porção ventrolateral (PAGvl) imunomarcados para tirosina hidroxilase, quantificação de glutamato no líquor, além da avaliação de parâmetros oxidativos. Os resultados obtidos foram expressos em valores de média ± erro padrão da média. Para comparação dos dados entre os grupos foi realizado ANOVA three e two-way de medidas repetidas, student t test, Mann-withney e ANCOVA com distância percorrida como co-. O nível crítico fixado foi de 5% (P<0,05). Após análise dos dados foi possível observar que a PMH apresenta menor massa corporal aos 60 DPN (p<0.01), maior concentração sérica de TT3 (p<0.05), maior analgesia na placa quente após a administração i.p. de morfina nos tempos 30 e 60 minutos (fator interação tempo e tratamento (F(4, 80) = 2,50; p <0,05) e maior peroxidação lipídica (avaliada pela quantificação do TBARS) na medula espinhal (p<0.01) quando comparada ao grupo controle. Diante do exposto, concluímos que o HGE não gera repercussões importantes nas mães tratadas, quando estas são comparadas as controle, no entanto, a prole sofre importantes efeitos da carência dos hormônios tireoideanos maternos no período intraútero. A carência de HTs no período gestacional acarreta alterações no peso corporal e nas concentrações séricas de TT3, bem como nos sistemas biológicos de controle nociceptivo.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Federal de SergipePós-Graduação em Ciências da SaúdeUFSBrasilCiências da saúdeHipotireoidismo gestacionalNocicepçãoPAGProleProgramação fetalEstresse oxidativoGestational hypothyroidismNociceptionRatsOffspringFetal programmingOxidative stressCIENCIAS DA SAUDEInfluência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratosinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSTEXTIURA_GONZALEZ_NOGUEIRA_ALVES.pdf.txtIURA_GONZALEZ_NOGUEIRA_ALVES.pdf.txtExtracted texttext/plain432312https://ri.ufs.br/jspui/bitstream/riufs/3620/2/IURA_GONZALEZ_NOGUEIRA_ALVES.pdf.txt2efcd2359984a0cb0859e8876b21dac5MD52THUMBNAILIURA_GONZALEZ_NOGUEIRA_ALVES.pdf.jpgIURA_GONZALEZ_NOGUEIRA_ALVES.pdf.jpgGenerated Thumbnailimage/jpeg1298https://ri.ufs.br/jspui/bitstream/riufs/3620/3/IURA_GONZALEZ_NOGUEIRA_ALVES.pdf.jpgf6dec78c67c8652e3bcd74668c888ca7MD53ORIGINALIURA_GONZALEZ_NOGUEIRA_ALVES.pdfapplication/pdf3681041https://ri.ufs.br/jspui/bitstream/riufs/3620/1/IURA_GONZALEZ_NOGUEIRA_ALVES.pdf38e33aa508205ef6d0d338d1599a8a2eMD51riufs/36202017-11-28 16:50:04.405oai:ufs.br:riufs/3620Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2017-11-28T19:50:04Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false |
dc.title.por.fl_str_mv |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos |
title |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos |
spellingShingle |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos Alves, Iura Gonzalez Nogueira Ciências da saúde Hipotireoidismo gestacional Nocicepção PAG Prole Programação fetal Estresse oxidativo Gestational hypothyroidism Nociception Rats Offspring Fetal programming Oxidative stress CIENCIAS DA SAUDE |
title_short |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos |
title_full |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos |
title_fullStr |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos |
title_full_unstemmed |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos |
title_sort |
Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos |
author |
Alves, Iura Gonzalez Nogueira |
author_facet |
Alves, Iura Gonzalez Nogueira |
author_role |
author |
dc.contributor.author.fl_str_mv |
Alves, Iura Gonzalez Nogueira |
dc.contributor.advisor1.fl_str_mv |
Santana Filho, Valter Joviniano de |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/9545770907160435 |
contributor_str_mv |
Santana Filho, Valter Joviniano de |
dc.subject.por.fl_str_mv |
Ciências da saúde Hipotireoidismo gestacional Nocicepção PAG Prole Programação fetal Estresse oxidativo |
topic |
Ciências da saúde Hipotireoidismo gestacional Nocicepção PAG Prole Programação fetal Estresse oxidativo Gestational hypothyroidism Nociception Rats Offspring Fetal programming Oxidative stress CIENCIAS DA SAUDE |
dc.subject.eng.fl_str_mv |
Gestational hypothyroidism Nociception Rats Offspring Fetal programming Oxidative stress |
dc.subject.cnpq.fl_str_mv |
CIENCIAS DA SAUDE |
description |
Changes in maternal thyroid hormones concentrations during pregnancy can affect the body development of pups. However, despite the recent race for the understanding of the mechanisms that explain the impact of perinatal life in the occurrence of different diseases, little has been done to investigate the role of maternal thyroid hormones for proper development of CNS structures, important in regulating perception nociceptive. In this sense, in the present study we investigate the effect of experimental gestational hypothyroidism (EGH) in biological systems of nociceptive circuitry. The EGH was induced by methimazole to 0.02% in drinking water from ninth day of gestation until delivery. The threshold for noxious temperature was evaluated by using the hot plate apparatus (52 ± 0.2 ° C) in male offspring from methimazole treated dams (OMTD) and offspring from water treated dams (OWTD), on postnatal day (PND) 60 days, in baseline condiction and after a drug injection (morphine, memantine, sertraline and AMPT). In addition, thyroid status was evaluated through the determination of total T3 and T4 serum levels on PND 60, sections through the vlPAG were processed for TH immunofluorescence, the contents of glutamate in the cerebrospinal fluid was measured and evaluated oxidative parameters in spinal cord. The results were expressed mean ± Standard Error values. Three and two way ANOVA, Student t test, Mann-Whitney and correlation test were used. The threshold of statistical significance was set at p<0.05. Thus, our data showed that EGH does not generate significant impact on the treated mothers when they are compared to control, but in the offspring important effects of lack of maternal THs in the intrauterine period were observed. OMTD had less body weight after 60 DPN (p <0.01), higher serum concentration of TT3 (p <0.05), higher analgesia on the hot plate after i.p. morphine, at times 30 and 60 minutes (time factor interaction and treatment (F (4, 80) = 2.50, p <0.05) and increased lipid peroxidation (assessed by quantification of TBARS) in the spinal cord (p <0.01 ). Given the above, we conclude that the lack of THs during pregnancy causes changes in body weight and serum concentrations of T3, as well as in biological systems of nociceptive circuitry. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016-07-29 |
dc.date.accessioned.fl_str_mv |
2017-09-26T12:07:29Z |
dc.date.available.fl_str_mv |
2017-09-26T12:07:29Z |
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info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
ALVES, Iura Gonzalez Nogueira. Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos. 2016. 199 f. Tese (Pós-Graduação em Ciências da Saúde) - Universidade Federal de Sergipe, Aracaju, 2016. |
dc.identifier.uri.fl_str_mv |
https://ri.ufs.br/handle/riufs/3620 |
identifier_str_mv |
ALVES, Iura Gonzalez Nogueira. Influência do hipotireoidismo gestacional experimental em sistemas biológicos centrais de regulação da nocicepção em ratos. 2016. 199 f. Tese (Pós-Graduação em Ciências da Saúde) - Universidade Federal de Sergipe, Aracaju, 2016. |
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https://ri.ufs.br/handle/riufs/3620 |
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