Increased Toll-like receptor 9 expression indicates adverse prognosis in oesophageal adenocarcinoma.

Research paper by Joonas H JH Kauppila, Heikki H Takala, Katri S KS Selander, Petri P PP Lehenkari, Juha J Saarnio, Tuomo J TJ Karttunen

Indexed on: 22 Oct '11Published on: 22 Oct '11Published in: Histopathology


Toll-like receptor 9 (TLR-9) is a cellular DNA receptor that has been linked previously to invasion in various cancers. The aim of this study was to investigate TLR-9 expression and its possible association with prognosis in oesophageal adenocarcinoma.Immunohistochemical TLR-9 expression was graded in clinical specimens (n = 76) of oesophageal adenocarcinoma. The TLR-9 immunostaining intensity was compared with tumour grade, stage and indicators of proliferation, apoptosis and tumour vascular supply. High TLR-9 expression correlated with advanced tumour stage, tumour unresectability, poor differentiation and high proliferation. Strong immunoreactivity of TLR-9 also indicated poor overall survival.High TLR-9 expression is associated with poor differentiation, a high proliferation rate and disseminated disease. Accordingly, increased TLR-9 expression may contribute to the growth and metastatic properties of oesophageal adenocarcinoma.