Microsatellites as EWS/FLI response elements in Ewing's sarcoma

Kunal Gangwal, Savita Sankar, Peter Hollenhorst, Michelle Kinsey, Stephen C. Haroldsen, Atul A. Shah, Kenneth M. Boucher, W. Scott Watkins, Lynn B. Jorde, Barbara J. Graves, Stephen L. Lessnick

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

The ETS gene family is frequently involved in chromosome translocations that cause human cancer, including prostate cancer, leukemia, and sarcoma. However, the mechanisms by which oncogenic ETS proteins, which are DNA-binding transcription factors, target genes necessary for tumorigenesis is not well understood. Ewing's sarcoma serves as a paradigm for the entire class of ETS-associated tumors because nearly all cases harbor recurrent chromosomal translocations involving ETS genes. The most common translocation in Ewing's sarcoma encodes the EWS/FLI oncogenic transcription factor. We used whole genome localization (ChIP-chip) to identify target genes that are directly bound by EWS/FLI. Analysis of the promoters of these genes demonstrated a significant over-representation of highly repetitive GGAA-containing elements (microsatellites). In a parallel approach, we found that EWS/FLI uses GGAA microsatellites to regulate the expression of some of its target genes including NR0B1, a gene required for Ewing's sarcoma oncogenesis. The microsatellite in the NR0B1 promoter bound EWS/FLI in vitro and in vivo and was both necessary and sufficient to confer EWS/FLI regulation to a reporter gene. Genome wide computational studies demonstrated that GGAA microsatellites were enriched close to EWS/FLI-up-regulated genes but not down-regulated genes. Mechanistic studies demonstrated that the ability of EWS/FLI to bind DNA and modulate gene expression through these repetitive elements depended on the number of consecutive GGAA motifs. These findings illustrate an unprecedented route to specificity for ETS proteins and use of microsatellites in tumorigenesis.

Original languageEnglish (US)
Pages (from-to)10149-10154
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume105
Issue number29
DOIs
StatePublished - Jul 22 2008
Externally publishedYes

Fingerprint

Ewing's Sarcoma
Response Elements
Microsatellite Repeats
Genes
Carcinogenesis
Prostatic Neoplasms
Transcription Factors
Genome
Genetic Translocation
DNA-Binding Proteins
Reporter Genes
Sarcoma
Leukemia
Chromosomes
Gene Expression
DNA

Keywords

  • ChIP-chip
  • ETS
  • Gene regulation
  • NR0B1
  • Transcription

ASJC Scopus subject areas

  • Genetics
  • General

Cite this

Microsatellites as EWS/FLI response elements in Ewing's sarcoma. / Gangwal, Kunal; Sankar, Savita; Hollenhorst, Peter; Kinsey, Michelle; Haroldsen, Stephen C.; Shah, Atul A.; Boucher, Kenneth M.; Watkins, W. Scott; Jorde, Lynn B.; Graves, Barbara J.; Lessnick, Stephen L.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 105, No. 29, 22.07.2008, p. 10149-10154.

Research output: Contribution to journalArticle

Gangwal, K, Sankar, S, Hollenhorst, P, Kinsey, M, Haroldsen, SC, Shah, AA, Boucher, KM, Watkins, WS, Jorde, LB, Graves, BJ & Lessnick, SL 2008, 'Microsatellites as EWS/FLI response elements in Ewing's sarcoma', Proceedings of the National Academy of Sciences of the United States of America, vol. 105, no. 29, pp. 10149-10154. https://doi.org/10.1073/pnas.0801073105
Gangwal, Kunal ; Sankar, Savita ; Hollenhorst, Peter ; Kinsey, Michelle ; Haroldsen, Stephen C. ; Shah, Atul A. ; Boucher, Kenneth M. ; Watkins, W. Scott ; Jorde, Lynn B. ; Graves, Barbara J. ; Lessnick, Stephen L. / Microsatellites as EWS/FLI response elements in Ewing's sarcoma. In: Proceedings of the National Academy of Sciences of the United States of America. 2008 ; Vol. 105, No. 29. pp. 10149-10154.
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AU - Shah, Atul A.

AU - Boucher, Kenneth M.

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AU - Graves, Barbara J.

AU - Lessnick, Stephen L.

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