Efeitos da inalação de fumaça de tabaco sobre a morfologia e a taxa de proliferação celular em glândulas submandibulares de ratos Wistar

Autores

DOI:

https://doi.org/10.33448/rsd-v10i8.17327

Palavras-chave:

Proliferação celular; Cigarro; KI-67; Fumante passivo; Glândulas salivares; Glândula submandibular.

Resumo

Cigarette smoke compromises the salivary glands, altering saliva. Cotinine is the most effective biomarker to assess tobacco consumption, and passive smokers are characterized by serum cotinine levels above 2.1 ng/mL. O objetivo deste estudo foi avaliar o efeito da exposição à fumaça do cigarro nas glândulas submandibulares de ratos. Foram analisadas a morfologia, as células proliferativas dos ductos intercalados (imunohistoquímica para KI-67) e sua correlação com os níveis séricos de cotinina. Ratos Wistar foram agrupados: controle (C); inalação de fumaça por 30 dias (T1) e 60 dias (T2). Os dados foram analisados com os testes de homogeneidade de variância de Levene, teste de Spearman, ANOVA e pós-teste de Tukey, com significância p <0,05. A morfologia mostrou parênquima preservado em C e células secretoras alteradas em T1 e T2. Houve uma redução significativa no número de células proliferativas [ANOVA, F = 4,726; d.f. = 2,26; p <0,05]: C vs T1 (p <0,05) e C vs T2 (p <0,05). Os níveis séricos de cotinina T1 e T2 foram significativamente maiores (p <0,05) do que C. Houve uma correlação negativa significativa [ρ = -0,418, n = 27, p <0,05] entre os níveis séricos de cotinina e a taxa de proliferação celular. Esses resultados sugerem que a inalação de fumaça de tabaco leva a diminuição da taxa de proliferação celular e morfologia alterada nas glândulas submandibulares de ratos Wistar.

Biografia do Autor

Lorraine Stephanie Hiss, Federal University of Triângulo Mineiro

Department, Institute of Natural and Biological Sciences, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil

Anna Cecília Dias Maciel Carneiro, Federal University of Triângulo Mineiro

Structural Biology Department, Institute of Natural and Biological Sciences, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil

Rodrigo César Rosa, Federal University of Triângulo Mineiro

Structural Biology Department, Institute of Natural and Biological Sciences, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil

Adilha Misson Rua Micheletti, Federal University of Triângulo Mineiro

Pathology Department, Institute of Health Sciences, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil

José Batista Volpon, University of São Paulo

Department of Biomechanics, Medicine and Rehabilitation, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil

Virginia Oliveira Crema, Federal University of Triângulo Mineiro

Structural Biology Department, Institute of Natural and Biological Sciences, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil

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12/07/2021

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HISS, L. S. .; CARNEIRO, A. C. D. M. .; ROSA, R. C. .; MICHELETTI, A. M. R. .; VOLPON, J. B. .; CREMA, V. O. Efeitos da inalação de fumaça de tabaco sobre a morfologia e a taxa de proliferação celular em glândulas submandibulares de ratos Wistar. Research, Society and Development, [S. l.], v. 10, n. 8, p. e28510817327, 2021. DOI: 10.33448/rsd-v10i8.17327. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/17327. Acesso em: 22 nov. 2024.

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