Role of the Fos family members, c-Fos, Fra-1 and Fra-2, in the regulation of cell motility

Vadim Tkach, Eugene Tulchinsky, Eugene Lukanidin, Charles Vinson, Elisabeth Bock, Vladimir Berezin

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)


The AP-1 transcription factor is composed of members of the Fos, Jun and ATF families, and plays a key role in tumor progression. We investigated whether Fos proteins regulate cell motility, and if so, whether this capacity is related to their transactivation potential. Two cell lines with different expression profiles of AP-1 were employed focusing on the Fos-family members c-Fos, Fra-1 and Fra-2. Transactivation motifs are found in c-Fos, but not in Fra-1 or Fra-2. The adenocarcinoma CSML0 cells display a low motility and do not express Fra-1 or Fra-2, and only very little c-Fos. In contrast, the fibroblastoid L929 cells express both Fra-1 and Fra-2, but no c-Fos, and these cells display a high motility. Transfection with Fra-1 or c-Fos, but not with Fra-2, strongly enhanced the motility of CSML0 cells. The effect of Fra-1 required the presence of the N-terminal domain of this protein. Conversely, transfection with a Fos dominant-negative mutant or with anti-sense fra-1 or fra-2, strongly reduced the motility of L929 cells. Changes in cell motility correlated with the morphological appearance and the degree of contact with the substratum. We conclude that Fos proteins have distinct roles in the regulation of cell motility.

Original languageEnglish
Pages (from-to)5045-5054
Number of pages10
Issue number32
Publication statusPublished - Aug 7 2003
Externally publishedYes


  • C-Fos
  • Cell locomotion
  • Fra-1
  • Fra-2

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

Fingerprint Dive into the research topics of 'Role of the Fos family members, c-Fos, Fra-1 and Fra-2, in the regulation of cell motility'. Together they form a unique fingerprint.

Cite this