RESUMO
OBJECTIVES: The objective of this study was to comparatively evaluate the density of lymphatic vessels (LVD) and neoformed microvessels (NMVD) in squamous cell carcinoma of the oral cavity (OCSCC) and lip (LSCC). Association between LVD/NMVD and vascular endothelial growth factor (VEGF)-A/-C was also assessed. STUDY DESIGN: OCSCC and LSCC were compared with regard to immunoexpression of LVD, NMVD, and vascular endothelial growth factor-A (VEGF)-A/-C. Association between VEGF-A/-C with vascularity was also assessed. Statistical analyses were performed using t test, Pearson χ(2), and Mann-Whitney tests. Statistical significance was accepted at P less than .05. RESULTS: The NMVD and VEGF-C expressions were significantly higher in OCSCC compared with LSCC. NMVD was associated with VEGF-C in OCSCC, but not in LSCC. CONCLUSIONS: Differences in NMVD and VEGF-C were found between OCSCC and LSCC. Positive association between VEGF-C and NMVD was observed in OCSCC, but not in LSCC, which may be one of the contributing factors that account for the distinctive clinical-biological behavior of these lesions.
Assuntos
Carcinoma de Células Escamosas/irrigação sanguínea , Microvasos/patologia , Neoplasias Bucais/irrigação sanguínea , Neovascularização Patológica , Biomarcadores Tumorais/análise , Carcinoma de Células Escamosas/metabolismo , Distribuição de Qui-Quadrado , Feminino , Humanos , Neoplasias Labiais/irrigação sanguínea , Neoplasias Labiais/metabolismo , Vasos Linfáticos/patologia , Masculino , Pessoa de Meia-Idade , Soalho Bucal/irrigação sanguínea , Soalho Bucal/metabolismo , Neoplasias Bucais/metabolismo , Estatísticas não Paramétricas , Neoplasias da Língua/irrigação sanguínea , Neoplasias da Língua/metabolismo , Fator A de Crescimento do Endotélio Vascular/biossíntese , Fator C de Crescimento do Endotélio Vascular/biossínteseRESUMO
BACKGROUND: Perforin and granzyme B (GB) are the main constituents of cytotoxic T-lymphocyte granules, and they have important roles in preventing the initiation and progression of cancer. METHODS: The aim of this study was to compare the expression of CD8(+) /perforin(+) double-staining and GB(+) cells, by immunohistochemistry, in primary oral cavity squamous cell carcinoma (OCSCC), lip squamous cell carcinoma (LSCC), non-dysplastic leukoplakia (LK), dysplastic LK, actinic cheilitis (AC), oral lichen planus (LP) and normal oral mucosa. RESULTS: Our results showed a higher expression of CD8(+) /perforin(+) and GB(+) cells in LSCC when compared with the samples of OCSCC, non-dysplastic and dysplastic LK, AC, oral LP and normal oral mucosa. In addition, increased CD8(+) /perforin(+) and GB(+) cell numbers were observed in all pre-malignant lesions (non-dysplastic LK, dysplastic LK, AC) when compared with the control. CONCLUSIONS: Perforin and GB proteins may contribute to antitumoural immunity, leading to the direct killing of tumour cells; however, it seems to occur more effectively in LSCC than OCSCC.