Aiolos promotes anchorage independence by silencing p66Shc transcription in cancer cells

Cancer Cell. 2014 May 12;25(5):575-89. doi: 10.1016/j.ccr.2014.03.020.

Abstract

Anchorage of tissue cells to their physical environment is an obligate requirement for survival that is lost in mature hematopoietic and in transformed epithelial cells. Here we find that a lymphocyte lineage-restricted transcription factor, Aiolos, is frequently expressed in lung cancers and predicts markedly reduced patient survival. Aiolos decreases expression of a large set of adhesion-related genes, disrupting cell-cell and cell-matrix interactions. Aiolos also reconfigures chromatin structure within the SHC1 gene, causing isoform-specific silencing of the anchorage reporter p66(Shc) and blocking anoikis in vitro and in vivo. In lung cancer tissues and single cells, p66(Shc) expression inversely correlates with that of Aiolos. Together, these findings suggest that Aiolos functions as an epigenetic driver of lymphocyte mimicry in metastatic epithelial cancers.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anoikis / genetics
  • Carcinoma, Non-Small-Cell Lung / genetics*
  • Carcinoma, Non-Small-Cell Lung / metabolism
  • Carcinoma, Non-Small-Cell Lung / mortality
  • Cell Adhesion / genetics
  • Cell Adhesion / physiology
  • Cell Communication / physiology
  • Cell Line, Tumor
  • Cell Proliferation
  • Cell Transformation, Neoplastic / genetics
  • Chromatin / metabolism
  • Gene Expression Profiling
  • Gene Expression Regulation, Neoplastic*
  • Gene Silencing*
  • Humans
  • Ikaros Transcription Factor / metabolism*
  • Lung / metabolism
  • Lung / pathology
  • Lung Neoplasms / genetics*
  • Lung Neoplasms / metabolism
  • Lung Neoplasms / mortality
  • Lymphopoiesis / genetics
  • Promoter Regions, Genetic
  • Shc Signaling Adaptor Proteins / genetics*
  • Src Homology 2 Domain-Containing, Transforming Protein 1
  • Transcription, Genetic

Substances

  • Chromatin
  • IKZF3 protein, human
  • SHC1 protein, human
  • Shc Signaling Adaptor Proteins
  • Src Homology 2 Domain-Containing, Transforming Protein 1
  • Ikaros Transcription Factor

Associated data

  • GEO/GSE50812