Prognostic significance of Beclin-1 expression in laryngeal squamous cell carcinoma

Pathol Oncol Res. 2013 Oct;19(4):771-7. doi: 10.1007/s12253-013-9642-0. Epub 2013 May 19.

Abstract

Beclin-1 plays a critical role in the regulation of autophagy, apoptosis, differentiation and the development and progression of cancer. The aim of the present investigation was to analyze the Beclin-1 protein expression and to assess its prognostic significance in tissue of laryngeal squamous cell carcinoma (LSCC). Beclin-1 protein expression in 82 primary laryngeal squamous cell carcinoma and 40 paracarcinoma non-tumor tissue samples was analyzed by immunohistochemistry and correlated with clinicopathological parameters and patients' outcome. The expression of Beclin-1 in tumor tissues was significantly lower than that in non-tumor tissues (P = 0.035). Reduced Beclin-1 expression was significantly correlated with lymph node metastases (P = 0.021). Kaplan-Meier survival estimates showed a significant correlation between Beclin-1 expression and patient's survival rate (log-rank P < 0.05). Multivariate Cox proportional hazards model analysis confirmed that lymph node metastases (P = 0.048) and Beclin-1 expression (P = 0.029) were statistically significant, independent prognostic factors for LSCC. Our findings suggested that decreased Beclin-1 expression and lymph node metastases, as examined by immunohistochemistry, are both independent biomarker for poor prognosis of patients with LSCC.

MeSH terms

  • Adult
  • Aged
  • Apoptosis Regulatory Proteins / biosynthesis*
  • Apoptosis Regulatory Proteins / metabolism
  • Beclin-1
  • Carcinoma, Squamous Cell / metabolism*
  • Carcinoma, Squamous Cell / pathology*
  • Female
  • Head and Neck Neoplasms / metabolism*
  • Head and Neck Neoplasms / pathology*
  • Humans
  • Kaplan-Meier Estimate
  • Laryngeal Neoplasms / metabolism*
  • Laryngeal Neoplasms / pathology*
  • Male
  • Membrane Proteins / biosynthesis*
  • Membrane Proteins / metabolism
  • Middle Aged
  • Prognosis
  • Proportional Hazards Models
  • Squamous Cell Carcinoma of Head and Neck

Substances

  • Apoptosis Regulatory Proteins
  • BECN1 protein, human
  • Beclin-1
  • Membrane Proteins