Cited by 1,823Genetics and Neurodevelopmental DisordersEpigenetics and DNA MethylationGenomics and Chromatin Dynamics

MeCP2, a Key Contributor to Neurological Disease, Activates and Represses Transcription

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Chahrour, Maria, Jung, Sung Yun, Shaw, Chad, Zhou, Xiaobo, Wong, Stephen T. C., Qin, Jun, Zoghbi, Huda Y.·2008·Science

Abstract

Mutations in the gene encoding the transcriptional repressor methyl-CpG binding protein 2 (MeCP2) cause the neurodevelopmental disorder Rett syndrome. Loss of function as well as increased dosage of the MECP2 gene cause a host of neuropsychiatric disorders. To explore the molecular mechanism(s) underlying these disorders, we examined gene expression patterns in the hypothalamus of mice that either lack or overexpress MeCP2. In both models, MeCP2 dysfunction induced changes in the expression levels of thousands of genes, but unexpectedly the majority of genes (∼85%) appeared to be activated by MeCP2. We selected six genes and confirmed that MeCP2 binds to their promoters. Furthermore, we showed that MeCP2 associates with the transcriptional activator CREB1 at the promoter of an activated target but not a repressed target. These studies suggest that MeCP2 regulates the expression of a wide range of genes in the hypothalamus and that it can function as both an activator and a repressor of transcription.

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  • Elimination of MeCP2 affects the expression of a profound number of pathways in the CNS, making it difficult to pinpoint which pathways play a key role in RTT pathology.

    “While Mecp2 mutant mice are an excellent model for RTT, elimination of MeCP2 affects the expression of a profound number of pathways in the CNS, making it difficult to pinpoint which ones play a key role in pathology [77,89,90].”

    From Rett syndrome: a neurological disorder with metabolic components (2018) · cites this paper as [77]

    The gene-expression results (section labeled Abstract; page not provided) report thousands of altered genes in the hypothalamus of Mecp2-null and overexpressing mice, across distinct functional categories. The concluding passage says that restoring each affected gene may be challenging, but it does not say that identifying the pathways key to RTT pathology is difficult. The study examined the hypothalamus, not the CNS as a whole. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • MeCP2 may also facilitate transcriptional activation, chromatin compaction and mRNA splicing, while interacting with other regulatory proteins.

    “However, MeCP2 may also facilitate transcriptional activation [77], chromatin compaction [78,79] and mRNA splicing [80,81], while also interacting with a host of other regulatory proteins involved in a variety of molecular pathways [81–84].”
  • MeCP2 may be defined as a transcriptional modulator.

    “Altogether, multiple studies suggest that genes can be activated or repressed by MeCP2, depending upon the cellular context [77,89,90], suggesting that MeCP2 may be defined as a transcriptional modulator.”
  • MeCP2 binding to methylated DNA has a biphasic impact on transcription.

    “These data are consistent with another study showing that MeCP2 binding to methylated DNA has a biphasic impact on transcription.”

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Research works printed but not linked: 2

  1. [11]Srinivasan K, et al. Methods. 2005;37:345. [Google Scholar]
  2. [18]Sykut-Cegielska J, Gradowska W, Mercimek-Mahmutoglu S, Stockler-Ipsiroglu S. Acta Biochim Pol. 2004;51:875. [PubMed] [Google Scholar]

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Authors
Chahrour, M., Jung, S. Y., Shaw, C., Zhou, X., Wong, S. T. C., Qin, J., & Zoghbi, H. Y.
Affiliations
Baylor College of Medicine (US)
Corresponding author
Zoghbi, Huda Y.
Venue
Science
Published
2008-05-30
Volume
320
Issue
5880
Pages
1224-1229
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2039276157
Cited by
1,823
References
22
Citations by year
2026: 53 · 2025: 55 · 2024: 76 · 2023: 67 · 2022: 84 · 2021: 95 · 2020: 96 · 2019: 90 · 2018: 69 · 2017: 131 · 2016: 133 · 2015: 113 · 2014: 131 · 2013: 153 · 2012: 128
FWCI
66.47
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute of Neurological Disorders and Stroke (NS057819, R01NS057819)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD 024064, P30HD024064)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
MeCP2, Rett syndrome, transcriptional repression, transcriptional activation, CREB1, promoter binding, hypothalamus, gene expression profiling, neuropsychiatric disorders, neurodevelopmental disorders
MeSH terms
Animals, Disease Models, Animal, Gene Expression Regulation, Hypothalamic Diseases, Hypothalamus, Male, Mice, Inbred C57BL, Nerve Tissue Proteins, Nervous System Diseases, Protein Binding, Repressor Proteins, Transcription Factors, Rett Syndrome, Transcriptional Activation, Cyclic AMP Response Element-Binding Protein, Reverse Transcriptase Polymerase Chain Reaction, Oligonucleotide Array Sequence Analysis, Mice, Methyl-CpG-Binding Protein 2

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