Journal of Oncology (2016-01-01)

Correlation of Beta-2 Adrenergic Receptor Expression in Tumor-Free Surgical Margin and at the Invasive Front of Oral Squamous Cell Carcinoma

  • Denise Tostes Oliveira,
  • Diego Mauricio Bravo-Calderón,
  • Gustavo Amaral Lauand,
  • Agnes Assao,
  • José-Manuel Suárez-Peñaranda,
  • Mario Pérez-Sayáns,
  • Abel García-García,
  • Aparecido Nilceu Marana,
  • Suely Nonogaki,
  • José Roberto Pereira Lauris,
  • Luiz Paulo Kowalski

DOI
https://doi.org/10.1155/2016/3531274
Journal volume & issue
Vol. 2016

Abstract

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Background. The beta-2 adrenergic receptor is expressed by neoplastic cells and is correlated with a wide spectrum of tumor cell mechanisms including proliferation, apoptosis, angiogenesis, migration, and metastasis. Objectives. The present study aimed to analyze the expression of the beta-2 adrenergic receptor (β2-AR) in tumor-free surgical margins of oral squamous cell carcinomas (OSCC) and at the invasive front. Sixty-two patients diagnosed with OSCC, confirmed by biopsy, were selected for the study. The clinicopathological data and clinical follow-up were obtained from medical records and their association with β2-AR expression was verified by the chi-square test or Fischer’s exact test. To verify the correlation of β2-AR expression in tumor-free surgical margins and at the invasive front of OSCCs, Pearson’s correlation coefficient test was applied. Results. The expression of β2-AR presented a statistically significant correlation between the tumor-free surgical margins and the invasive front of OSCC (r=0.383; p=0.002). The immunohistochemical distribution of β2-AR at the invasive front of OSCC was also statistically significant associated with alcohol (p=0.038), simultaneous alcohol and tobacco consumption (p=0.010), and T stage (p=0.014). Conclusions. The correlation of β2-AR expression in OSCC and tumor-free surgical margins suggests a role of this receptor in tumor progression and its expression in normal oral epithelium seems to be constitutive.