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Periodontite experimental como fator de risco na potencialização dos efeitos do imobilismo

Authors: Leite, Marcela Aparecida;

Periodontite experimental como fator de risco na potencialização dos efeitos do imobilismo

Abstract

Objective: To evaluate whether periodontal disease, through systemic inflammation, can potentiates the deleterious effects of immobilization of the skeletal striated muscle, contributing to the development of muscle atrophy due to disuse. Methods: Forty Wistar rats were divided into four groups: 1) Control Group (CG), 2) Periodontal Disease (GPD) 3) Immobilized (IG) and 4) Immobilized with Periodontal Disease (IPDG). Periodontal disease was induced for 30 days, with ligature method, and the immobilization of the right pelvic limb was performed with cast bandage for 15 days. Prior to euthanasia, the nociceptive threshold and muscular grasping force were evaluated. Afterwards, the soleus muscle was dissected and processed for sarcomere counting and morphological and morphometric analysis. For analysis of the data, the one-way ANOVA followed by the Tukey post test, with p < 0.05. Results: The IG and IPDG groups presented lower muscle weight, lower muscular grip strength and less number of sarcomeres compared to CG. The PDG showed reduction of muscle strength and nociceptive threshold after 15 days of periodontal disease and increase of connective tissue compared to CG. The IPDG presented lower muscle length and nociceptive threshold compared to the other groups. The IG presented a reduction in the cross-sectional area and a smaller diameter, an increase in the number of nuclei and a nucleus/fiber ratio, a decrease in the number of capillaries and a capillary/fiber ratio, with an increase in connective tissue. In the IPDG group, there were significant results for increased nucleus/fiber ratio, decreased capillaries and increased connective tissue when compared to the IG group. The IPDG group presented greater muscle tissue degeneration and increased inflammatory cells when compared to the other groups. Conclusion: Periodontal disease potentiated the deleterious effects of immobilization of the skeletal striated muscle, through intense destruction of muscle tissue, with significant increase of connective tissue, nucleus/fiber ratio and inflammatory infiltrate, significant reduction of vascularization and reduction of muscle length, with consequent reduction of muscle strength and nociceptive threshold.

Objetivo: Avaliar se a doença periodontal, por meio da inflamação sistêmica, potencializa os efeitos deletérios da imobilização do músculo estriado esquelético, colaborando para o desenvolvimento da atrofia muscular por desuso. Metodologia: Foram utilizados 40 ratos Wistar, divididos em quatro grupos: 1) Grupo Controle (GC); 2) Doença Periodontal (GDP); 3) Imobilizado (GI); 4) Doença Periodontal Imobilizado (GDPI). A doença periodontal foi induzida pelo método de ligadura, durante 30 dias e a imobilização do membro pélvico direito foi realizada com atadura gessada, por 15 dias. Antes da eutanásia, foram avaliados o limiar nociceptivo e força muscular de preensão. Após, o músculo sóleo foi dissecado e processado para contagem de sarcômeros e análise morfológica e morfométrica. Para análise dos dados, foi utilizado o teste ANOVA de uma via seguida do post test Tukey, com p<0,05. Resultados: Os grupos GI e GDPI apresentaram menor peso muscular, força muscular de preensão e número de sarcômeros comparados ao GC. O GDP apresentou redução da força muscular e do limiar nociceptivo após 15 dias de doença periodontal e aumento de tecido conjuntivo comparado ao GC. O GDPI apresentou menor comprimento muscular e limiar nociceptivo comparados aos demais grupos. O GI apresentou redução da área de secção transversa e menor diâmetro, aumento no número de núcleos e razão núcleo/fibra, diminuição no número de capilares e razão capilar/fibra, com aumento de tecido conjuntivo. No grupo GDPI, houve resultados significativos para aumento da razão núcleo/fibra, diminuição de capilares e aumento de tecido conjuntivo quando comparado ao grupo GI. O grupo GDPI apresentou maior degeneração do tecido muscular e aumento de células inflamatórias quando comparado aos outros grupos. Conclusão: A doença periodontal potencializou os efeitos deletérios da imobilização do músculo estriado esquelético, por meio da intensa destruição do tecido muscular, com significativo aumento do tecido conjuntivo, da razão núcleo/fibra e infiltrado inflamatório, significativa diminuição da vascularização e redução do comprimento muscular, com consequente redução da força muscular e limiar nociceptivo.

Made available in DSpace on 2017-11-27T18:31:17Z (GMT). No. of bitstreams: 2 MARCELA LEITE2017.pdf: 2527004 bytes, checksum: 37310bebca45bcc15d56cfda1b505434 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-01-25

Submitted by Edineia Teixeira (edineia.teixeira@unioeste.br) on 2017-11-27T18:31:17Z No. of bitstreams: 2 MARCELA LEITE2017.pdf: 2527004 bytes, checksum: 37310bebca45bcc15d56cfda1b505434 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES

Keywords

Inflammation, Inflamação, Immobilization, Imobilização, CIENCIAS BIOLOGICAS, Periodontite, Muscle atrophy, Periodontitis

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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