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TT-seq captures enhancer landscapes immediately after T-cell stimulation.

Margaux Michel1, Carina Demel1, Benedikt Zacher2

  • 1Department of Molecular Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.

Molecular Systems Biology
|March 9, 2017
PubMed
Summary

Transient transcriptome sequencing (TT-seq) captures rapid gene expression changes in T cells. This method monitors enhancer and promoter activity with high sensitivity, revealing early transcriptional responses within minutes.

Keywords:
T‐cell responseenhancersfunctional genomicspromoterstranscriptome analysis

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Area of Science:

  • Molecular Biology
  • Genomics
  • Cellular Biology

Background:

  • Monitoring transcriptional regulation requires high sensitivity and temporal resolution.
  • Understanding rapid changes in enhancer and promoter activity is crucial for studying cellular responses.

Purpose of the Study:

  • To evaluate the utility of transient transcriptome sequencing (TT-seq) for monitoring rapid transcriptional changes.
  • To assess TT-seq's ability to capture immediate responses in T cells stimulated with ionomycin and PMA.
  • To identify early changes in enhancer RNA (eRNA) and messenger RNA (mRNA) synthesis.

Main Methods:

  • Utilized TT-seq to map eRNAs and mRNAs at 5-minute intervals post-T-cell stimulation.
  • Compared TT-seq data with standard RNA-sequencing (RNA-seq) for differential gene expression analysis.
  • Investigated the relationship between enhancer transcription and promoter activity.

Main Results:

  • TT-seq detected significant changes in 1,601 eRNAs and 650 mRNAs within 15 minutes of stimulation.
  • Standard RNA-seq failed to detect these early transcriptional changes.
  • Demonstrated that enhancer transcription can precede or occur simultaneously with target gene promoter transcription.
  • Identified numerous novel primary response genes.

Conclusions:

  • TT-seq is a sensitive tool for monitoring dynamic changes in enhancer and promoter activity.
  • Enhancer transcription serves as a reliable indicator of regulatory activity during gene activation.
  • TT-seq enables the study of transcriptional dynamics during cellular responses and differentiation.