Cited by 113Developmental Biology and Gene RegulationNeurogenesis and neuroplasticity mechanismsGenomics and Chromatin Dynamics

Identification of in vivo DNA-binding mechanisms of Pax6 and reconstruction of Pax6-dependent gene regulatory networks during forebrain and lens development

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Sun, Jian, Rockowitz, Shira, Xie, Qing, Ashery-Padan, Ruth, Zheng, Deyou, Cvekl, Ales·2015·Nucleic Acids Research

Abstract

The transcription factor Pax6 is comprised of the paired domain (PD) and homeodomain (HD). In the developing forebrain, Pax6 is expressed in ventricular zone precursor cells and in specific subpopulations of neurons; absence of Pax6 results in disrupted cell proliferation and cell fate specification. Pax6 also regulates the entire lens developmental program. To reconstruct Pax6-dependent gene regulatory networks (GRNs), ChIP-seq studies were performed using forebrain and lens chromatin from mice. A total of 3514 (forebrain) and 3723 (lens) Pax6-containing peaks were identified, with ∼70% of them found in both tissues and thereafter called 'common' peaks. Analysis of Pax6-bound peaks identified motifs that closely resemble Pax6-PD, Pax6-PD/HD and Pax6-HD established binding sequences. Mapping of H3K4me1, H3K4me3, H3K27ac, H3K27me3 and RNA polymerase II revealed distinct types of tissue-specific enhancers bound by Pax6. Pax6 directly regulates cortical neurogenesis through activation (e.g. Dmrta1 and Ngn2) and repression (e.g. Ascl1, Fezf2, and Gsx2) of transcription factors. In lens, Pax6 directly regulates cell cycle exit via components of FGF (Fgfr2, Prox1 and Ccnd1) and Wnt (Dkk3, Wnt7a, Lrp6, Bcl9l, and Ccnd1) signaling pathways. Collectively, these studies provide genome-wide analysis of Pax6-dependent GRNs in lens and forebrain and establish novel roles of Pax6 in organogenesis.

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  • Few public ChIP-seq profiles exist for neural-specific transcription factors, and most of those have been performed in the developing mouse neocortex.

    “However, very few public chromatin immunoprecipitation sequencing (ChIP-seq) profiles exist, and most of those have been performed in the developing mouse neocortex (Bayam et al., 2015, Notwell et al., 2016, Sun et al., 2015).”

    From Multiscale 3D Genome Rewiring during Mouse Neural Development (2017) · cites this paper as Sun et al., 2015

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Authors
Sun, J., Rockowitz, S., Xie, Q., Ashery-Padan, R., Zheng, D., & Cvekl, A.
Affiliations
Albert Einstein College of Medicine (US)
Venue
Nucleic Acids Research
Published
2015-07-02
Volume
43
Issue
14
Pages
6827-6846
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2105720738
Cited by
113
References
106
Citations by year
2026: 5 · 2025: 11 · 2024: 13 · 2023: 4 · 2022: 10 · 2021: 10 · 2020: 9 · 2019: 13 · 2018: 19 · 2017: 8 · 2016: 6 · 2015: 4
FWCI
5.35
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • Research to Prevent Blindness
  • Yeshiva University
  • National Institutes of Health
  • Albert Einstein College of Medicine, Yeshiva University
  • National Institute of Mental Health (R21MH099452)
  • National Eye Institute (R01EY012200)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
Pax6, DNA binding mechanism, gene regulatory networks, forebrain development, lens development, transcription factor binding sites, enhancers, H3K4me1, H3K4me3, H3K27ac, H3K27me3, RNA polymerase II, cortical neurogenesis, cell cycle exit, FGF signaling, Wnt signaling, Ngn2, ASCL1, Fezf2, Gsx2, Prox1, FGFR2, DKK3, Wnt7a, LRP6, BCL9L, CCND1, organogenesis
MeSH terms
PAX6 Transcription Factor, Animals, Binding Sites, Chromatin, DNA, Enhancer Elements, Genetic, Eye Proteins, Lens, Crystalline, Protein Binding, Repressor Proteins, Transcription, Genetic, Prosencephalon, Mice, Knockout, Homeodomain Proteins, Gene Expression Regulation, Developmental, Mice, Paired Box Transcription Factors, Gene Regulatory Networks, Neurogenesis

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