Is LRIG1 a tumour suppressor gene at chromosome 3p14.3?

Acta Oncol. 2002;41(4):352-4. doi: 10.1080/028418602760169398.


The LRIG1 gene (formerly LIG-1), recently cloned by us, displays structural similarities to the Drosophila Kek I gene. Kek I encodes a cell surface protein, Kekkon-1, which inhibits epidermal growth factor receptor-mediated signalling. We localized the LRIG1 gene to chromosome band 3p14.3, a region known to be deleted in various human cancers. In the present study LRIG1 gene expression was examined in different tumour cell lines and corresponding normal tissues by real-time RT-PCR. In many tumour cell lines, LRIG1 expression appeared absent or was down regulated compared to corresponding normal tissues. The results are consistent with LRIG1 being a tumour suppressor gene in humans. However, further studies are justified to elucidate the explicit role of LRIG1 as a negative regulator of oncogenesis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromosomes, Human, Pair 3 / genetics*
  • Down-Regulation
  • Gene Deletion
  • Gene Expression Regulation, Neoplastic
  • Genes, Tumor Suppressor / physiology*
  • Genetic Linkage
  • Humans
  • Membrane Glycoproteins / genetics*
  • Membrane Glycoproteins / metabolism
  • Neoplasms / genetics
  • Neoplasms / metabolism
  • Neoplasms / pathology
  • RNA / metabolism
  • Reverse Transcriptase Polymerase Chain Reaction
  • Tumor Cells, Cultured


  • LRIG1 protein, human
  • Membrane Glycoproteins
  • RNA