Cited by 53Developmental Biology and Gene RegulationHedgehog Signaling Pathway StudiesNeurogenesis and neuroplasticity mechanisms

A direct fate exclusion mechanism by Sonic hedgehog-regulated transcriptional repressors

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Nishi, Yuichi, Zhang, Xiaoxiao, Jeong, Jieun, Peterson, Kevin A., Vedenko, Anastasia, Bulyk, Martha L., Hide, Winston A., McMahon, Andrew P.·2015·Development

Abstract

Sonic hedgehog (Shh) signaling patterns the vertebrate spinal cord by activating a group of transcriptional repressors in distinct neural progenitors of somatic motor neuron and interneuron subtypes. To identify the action of this network, we performed a genome-wide analysis of the regulatory actions of three key ventral determinants in mammalian neural tube patterning: Nkx2.2, Nkx6.1 and Olig2. Previous studies have demonstrated that each factor acts predominantly as a transcriptional repressor, at least in part, to inhibit alternative progenitor fate choices. Here, we reveal broad and direct repression of multiple alternative fates as a general mechanism of repressor action. Additionally, the repressor network targets multiple Shh signaling components providing negative feedback to ongoing Shh signaling. Analysis of chromatin organization around Nkx2.2-, Nkx6.1- and Olig2-bound regions, together with co-analysis of engagement of the transcriptional activator Sox2, indicate that repressors bind to, and probably modulate the action of, neural enhancers. Together, the data suggest a model for neural progenitor specification downstream of Shh signaling, in which Nkx2.2 and Olig2 direct repression of alternative neural progenitor fate determinants, an action augmented by the overlapping activity of Nkx6.1 in each cell type. Integration of repressor and activator inputs, notably activator inputs mediated by Sox2, is probably a key mechanism in achieving cell type-specific transcriptional outcomes in mammalian neural progenitor fate specification.

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Authors
Nishi, Y., Zhang, X., Jeong, J., Peterson, K. A., Vedenko, A., Bulyk, M. L., Hide, W. A., & McMahon, A. P.
Affiliations
  • University of Southern California (US)
  • Harvard University (US)
  • Brigham and Women's Hospital (US)
Corresponding author
McMahon, Andrew P.
Venue
Development
Published
2015-01-01
Volume
142
Issue
19
Pages
3286-93
ISSN
  • 0950-1991 (ISSN-L)
  • 1477-9129
OpenAlex
W2228067260
Cited by
53
References
38
Citations by year
2026: 2 · 2025: 6 · 2024: 6 · 2023: 7 · 2022: 2 · 2021: 6 · 2020: 4 · 2019: 4 · 2018: 3 · 2017: 6 · 2016: 6 · 2015: 1
FWCI
2.31
Type
journal article
Language
en
Open access
Locations
  • Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Funders
  • University of Minnesota
  • National Institutes of Health (NS-033642)
  • Medical Research Council
  • National Heart, Lung, and Blood Institute (T32HL087735)
  • National Human Genome Research Institute (R01HG003985)
  • National Institute of Neurological Disorders and Stroke (R01NS033642, R37NS033642)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Hedgehog Signaling Pathway Studies
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
Sonic hedgehog signaling, transcriptional repression, Nkx2.2, NKX6.1, Olig2, SOX2, chromatin organization, negative feedback, motor neuron subtypes, interneuron subtypes, cell-type-specific transcription
MeSH terms
Oligodendrocyte Transcription Factor 2, Homeobox Protein Nkx-2.2, Chromatin, Humans, Interneurons, Models, Biological, Motor Neurons, Nerve Tissue Proteins, Nuclear Proteins, Protein Binding, Repressor Proteins, Transcription Factors, Signal Transduction, Open Reading Frames, Homeodomain Proteins, Gene Expression Regulation, Developmental, Zebrafish Proteins, Protein Array Analysis, Chromatin Immunoprecipitation, Basic Helix-Loop-Helix Proteins, Hedgehog Proteins, Neural Tube, SOXB1 Transcription Factors, Neural Stem Cells

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