Efeito da laserterapia sobre IGF-1 nas glândulas submandibulares e parótidas de animais diabéticos induzidos por estreptozotocina

Autores

  • Danielle Lima Corrêa de Carvalho Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, SP
  • José Nicolau Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, SP
  • Alyne Simões Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil

DOI:

https://doi.org/10.11606/issn.2357-8041.clrd.2014.59344

Palavras-chave:

Diabetes Mellitus, Glicemia, Fator de Crescimento Insulin-Like I, Terapia a Laser, Glândulas Salivares.

Resumo

O Diabetes mellitus é um distúrbio metabólico de etiologia múltipla, caracterizado por hiperglicemia, podendo ocasioocasionar disfunções e falências de órgãos e tecidos, incluindo as glândulas salivares. Estudos demonstraram uma diminuidiminuição da glicemia de ratas diabéticas com o uso de laser de baixa potência (LBP) em glândulas salivares; no entanto, o mecanismo de ação do laser sobre o metabolismo dos carboidratos ainda é desconhecido. Assim, o objetivo do presente estudo foi analisar o efeito da irradiação com LBP na concentração de IGF-1 nas glândulas parótidas e submandibuares de ratas diabéticas induzidas por estreptozotocina. Trinta e oito ratas da raça Wistar receberam uma injeção intraperitoneal de estreptozotocina ou de tampão conforme o grupo ao qual pertenciam, C (controle) ou D (diabetes). Posteriormente, as ratas foram divididas em 4 subgrupos (C0, D0, C5 e D5), de acordo com a dose de irradiação recerecebida (0 ou 5 J/cm2). Após 29 dias da indução, os animais foram submetidos à simulação ou à irradiação. Após vinte e quatro horas, os animais foram sacrifi cados e as glândulas salivares, coletadas para a análise da concentração de IGF-1. No dia do sacrifício, a glicemia dos animais diabéticos que receberam irradiação estava diminuída quando comparada com a glicemia de diagnóstico (p ≤ 0,05). A concentração de IGF-1, entretanto, não sofreu infl uência da irradiação. Com base nesses resultados, podemos concluir que o LBP pode alterar a glicemia dos animais diabéticos; no entanto, esse efeito parece não estar relacionado com a concentração de IGF-1.

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Biografia do Autor

  • Danielle Lima Corrêa de Carvalho, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, SP
    Departamento de Biomateriais e Biologia Oral e Área Biologia Oral.
  • José Nicolau, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, SP
    Departamento de Biomateriais e Biologia Oral e Área Biologia Oral.
  • Alyne Simões, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
    Departamento de Biomateriais e Biologia Oral e Área Biologia Oral.

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Publicado

2014-09-08

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