Brazilian Journal of Oral Sciences (Dec 2017)

Immunohistochemical Study Of Fibronectin, Tenascin and Type I Collagen In Tongue And Lip carcinomas

  • João Luiz de Miranda,
  • Felipe Rodrigues de Matos,
  • Frederico Santos Lages,
  • Dhelfeson Willya Douglas-de-Oliveira,
  • Roseana de Almeida Freitas

DOI
https://doi.org/10.20396/bjos.v16i0.8651061
Journal volume & issue
Vol. 16

Abstract

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AIM: The aim was to compare the immunoexpression of extracellular matrix proteins in squamous cell carcinomas of tongue (SCCTo) and lower lip (SCCLi). METHODS: Eleven SCCTo and 11 SCCLi were selected and examined according to Bryne’s method (1998). For immunohistochemical study utilized antibodies to fibronectin, tenascin and type I collagen. Histopathologic and immunohistochemical analysis were performed on the tumor invasive front. RESULTS: All SCCTo were classified in high score malignant grade and all SCCLi in lower score. Fibronectin showed strong immunorreactivity in the peritumoral basement membrane (BM) in 91% of SCCTo and all cases of SCCLi, while in the tumor stroma (TS) all cases of SCCTo and SCCLi had strong intensity. Tenascin had strong expression in BM of 91% cases of SCCTo and 63.4% of SCCLi and in TS had strong expression in 91% cases of SCCTo and 54.6% of SCCLi. Type I collagen demonstrated weak immunoreactivity in the TS of 72.7% cases of SCCTo and 63.4% of SCCLi. CONCLUSION: These results may suggest that the strong expression of fibronectin and tenascin proteins and the weak expression of type I collagen could play a role in the invasive process of oral SCC.

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