Toll-like receptor 3 expression inhibits cell invasion and migration and predicts a favorable prognosis in neuroblastoma

Cancer Lett. 2013 Aug 19;336(2):338-46. doi: 10.1016/j.canlet.2013.03.024. Epub 2013 Mar 27.

Abstract

To evaluate the clinical significance of TLR3 expression on neuroblastomas, we performed immunohistochemical study on archival tissues and in vitro studies on neuroblastoma cell lines. The results showed that positive TLR3 expression was associated with favorable histology and prognosis. Activation of TLR3 by polyinosinic:polycytidylic acid [poly(I:C)] treatment is effective to suppress cell migration and invasion and to decrease organized assembly of F-actin and filopodia formation, in TLR3-expressing SK-N-AS cells, which could be reversed by TLR3-targeting siRNA treatment. TLR3 agonist poly(I:C) promotes GAP-43 expression also in SK-N-AS cells only. Taken together, TLR3 could serve to predict favorable behavior in neuroblastomas.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Actins / metabolism
  • Apoptosis / drug effects
  • Apoptosis / physiology
  • Cell Line, Tumor
  • Cell Movement / drug effects
  • Cell Movement / physiology
  • Child
  • Child, Preschool
  • Female
  • GAP-43 Protein / biosynthesis
  • Gene Expression
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Neuroblastoma / genetics
  • Neuroblastoma / metabolism*
  • Neuroblastoma / pathology*
  • Poly I-C / pharmacology
  • Prognosis
  • RNA, Small Interfering / administration & dosage
  • RNA, Small Interfering / genetics
  • Signal Transduction
  • Toll-Like Receptor 3 / agonists
  • Toll-Like Receptor 3 / biosynthesis*
  • Toll-Like Receptor 3 / genetics

Substances

  • Actins
  • GAP-43 Protein
  • RNA, Small Interfering
  • TLR3 protein, human
  • Toll-Like Receptor 3
  • Poly I-C