Expression of protease-activated receptor-2 (PAR-2) in patients with nasopharyngeal carcinoma: correlation with clinicopathological features and prognosis

Pathol Res Pract. 2009;205(8):542-50. doi: 10.1016/j.prp.2009.01.015. Epub 2009 Mar 6.

Abstract

We aimed at determining whether the expression of protease-activated receptor 2 (PAR-2) is involved in the progression of nasopharyngeal carcinoma (NPC) and correlated with latent membrane protein 1 (LMP-1), matrix metalloproteinases-9 (MMP9), and angiogenesis of tumor. PAR-2, LMP-1, and MMP9 expressions were detected in 57 biopsies of primary NPC by immunohistochemistry. The presence of Epstein-Barr virus (EBV) was determined using EBER in situ hybridization, and intratumoral microvessels were highlighted by staining endothelial cells for anti-CD34. The correlations with immunostainings and clinicopathological factors, as well as the follow-up data of patients, were analyzed statistically. Strong expression of PAR-2 in 61.4% (35/57) of the biopsies was correlated with extensive lymph node metastasis and advanced stage of NPC. The patients with PAR-2/LMP-1 or PAR-2/MMP9 dual high-expression tumors had a significant worse prognosis than those with single protein high expression and dual low or negative expression tumors (P=0.013 and 0.004, respectively). Angiogenesis in the tumor is related to overall survival of NPC patients (P=0.001), and exhibits strong PAR-2 expression or LMP-1 expression in tumors associated with increased intratumoral microvessel density (P=0.026 and 0.006, respectively). PAR-2 is a possible mediator cooperating with LMP-1 and MMP9 to influence the progression of NPC by inducing angiogenesis and promoting lymph node metastasis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing
  • Adult
  • Aged
  • Biomarkers, Tumor / metabolism
  • Carcinoma, Squamous Cell / metabolism
  • Carcinoma, Squamous Cell / mortality
  • Carcinoma, Squamous Cell / secondary*
  • China / epidemiology
  • Cytoskeletal Proteins
  • Female
  • Herpesvirus 4, Human / genetics
  • Herpesvirus 4, Human / isolation & purification
  • Humans
  • In Situ Hybridization
  • Intracellular Signaling Peptides and Proteins / metabolism
  • Keratins / metabolism
  • LIM Domain Proteins
  • Lymph Nodes / pathology
  • Lymphatic Metastasis
  • Male
  • Matrix Metalloproteinase 9 / metabolism
  • Middle Aged
  • Nasopharyngeal Neoplasms / metabolism
  • Nasopharyngeal Neoplasms / mortality
  • Nasopharyngeal Neoplasms / pathology*
  • Neovascularization, Pathologic / metabolism
  • Neovascularization, Pathologic / pathology
  • Prognosis
  • RNA-Binding Proteins / genetics
  • RNA-Binding Proteins / metabolism
  • Receptor, PAR-2 / metabolism*
  • Ribosomal Proteins / genetics
  • Ribosomal Proteins / metabolism
  • Survival Rate
  • Young Adult

Substances

  • Adaptor Proteins, Signal Transducing
  • Biomarkers, Tumor
  • Cytoskeletal Proteins
  • Intracellular Signaling Peptides and Proteins
  • LIM Domain Proteins
  • PDLIM7 protein, human
  • RNA-Binding Proteins
  • Receptor, PAR-2
  • Ribosomal Proteins
  • RPL22 protein, human
  • Keratins
  • Matrix Metalloproteinase 9