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Deletion of a conserved cis-element in the Ifng locus highlights the role of acute histone acetylation in modulating inducible gene transcription.

Publication ,  Journal Article
Balasubramani, A; Winstead, CJ; Turner, H; Janowski, KM; Harbour, SN; Shibata, Y; Crawford, GE; Hatton, RD; Weaver, CT
Published in: PLoS Genet
January 2014

Differentiation-dependent regulation of the Ifng cytokine gene locus in T helper (Th) cells has emerged as an excellent model for functional study of distal elements that control lineage-specific gene expression. We previously identified a cis-regulatory element located 22 kb upstream of the Ifng gene (Conserved Non-coding Sequence -22, or CNS-22) that is a site for recruitment of the transcription factors T-bet, Runx3, NF-κB and STAT4, which act to regulate transcription of the Ifng gene in Th1 cells. Here, we report the generation of mice with a conditional deletion of CNS-22 that has enabled us to define the epigenetic and functional consequences of its absence. Deletion of CNS-22 led to a defect in induction of Ifng by the cytokines IL-12 and IL-18, with a more modest effect on induction via T-cell receptor activation. To better understand how CNS-22 and other Ifng CNSs regulated Ifng transcription in response to these distinct stimuli, we examined activation-dependent changes in epigenetic modifications across the extended Ifng locus in CNS-22-deficient T cells. We demonstrate that in response to both cytokine and TCR driven activation signals, CNS-22 and other Ifng CNSs recruit increased activity of histone acetyl transferases (HATs) that transiently enhance levels of histones H3 and H4 acetylation across the extended Ifng locus. We also demonstrate that activation-responsive increases in histone acetylation levels are directly linked to the ability of Ifng CNSs to acutely enhance Pol II recruitment to the Ifng promoter. Finally, we show that impairment in IL-12+IL-18 dependent induction of Ifng stems from the importance of CNS-22 in coordinating locus-wide levels of histone acetylation in response to these cytokines. These findings identify a role for acute histone acetylation in the enhancer function of distal conserved cis-elements that regulate of Ifng gene expression.

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Published In

PLoS Genet

DOI

EISSN

1553-7404

Publication Date

January 2014

Volume

10

Issue

1

Start / End Page

e1003969

Location

United States

Related Subject Headings

  • Sequence Deletion
  • STAT4 Transcription Factor
  • Regulatory Sequences, Nucleic Acid
  • RNA Polymerase II
  • Mice, Knockout
  • Mice
  • Interleukin-18
  • Interleukin-12
  • Interferon-gamma
  • Histones
 

Citation

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Balasubramani, A., Winstead, C. J., Turner, H., Janowski, K. M., Harbour, S. N., Shibata, Y., … Weaver, C. T. (2014). Deletion of a conserved cis-element in the Ifng locus highlights the role of acute histone acetylation in modulating inducible gene transcription. PLoS Genet, 10(1), e1003969. https://doi.org/10.1371/journal.pgen.1003969
Balasubramani, Anand, Colleen J. Winstead, Henrietta Turner, Karen M. Janowski, Stacey N. Harbour, Yoichiro Shibata, Gregory E. Crawford, Robin D. Hatton, and Casey T. Weaver. “Deletion of a conserved cis-element in the Ifng locus highlights the role of acute histone acetylation in modulating inducible gene transcription.PLoS Genet 10, no. 1 (January 2014): e1003969. https://doi.org/10.1371/journal.pgen.1003969.
Balasubramani A, Winstead CJ, Turner H, Janowski KM, Harbour SN, Shibata Y, et al. Deletion of a conserved cis-element in the Ifng locus highlights the role of acute histone acetylation in modulating inducible gene transcription. PLoS Genet. 2014 Jan;10(1):e1003969.
Balasubramani, Anand, et al. “Deletion of a conserved cis-element in the Ifng locus highlights the role of acute histone acetylation in modulating inducible gene transcription.PLoS Genet, vol. 10, no. 1, Jan. 2014, p. e1003969. Pubmed, doi:10.1371/journal.pgen.1003969.
Balasubramani A, Winstead CJ, Turner H, Janowski KM, Harbour SN, Shibata Y, Crawford GE, Hatton RD, Weaver CT. Deletion of a conserved cis-element in the Ifng locus highlights the role of acute histone acetylation in modulating inducible gene transcription. PLoS Genet. 2014 Jan;10(1):e1003969.

Published In

PLoS Genet

DOI

EISSN

1553-7404

Publication Date

January 2014

Volume

10

Issue

1

Start / End Page

e1003969

Location

United States

Related Subject Headings

  • Sequence Deletion
  • STAT4 Transcription Factor
  • Regulatory Sequences, Nucleic Acid
  • RNA Polymerase II
  • Mice, Knockout
  • Mice
  • Interleukin-18
  • Interleukin-12
  • Interferon-gamma
  • Histones