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DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon [RNA-Seq]

ABSTRACT: Song learning in zebra finches is a prototypical example of a complex learned behavior, yet knowledge on the underlying molecular processes is limited. Therefore, we characterized transcriptomic (RNA sequencing) and epigenomic (RRBS, reduced representation bisulfite sequencing; immunofluorescence) dynamics in matched zebra finch telencephalon samples of both sexes from 1 day post hatching (1 dph) to adulthood, spanning the critical period for song learning (20 dph and 65 dph). We identified extensive transcriptional neurodevelopmental changes during postnatal telencephalon development. DNA (hydroxy)methylation was very low, yet increased over time, particularly in song control nuclei. Only a small fraction of the massive differential expression in the developing zebra finch telencephalon could be explained by differential CpG and CpH DNA methylation. However, a strong association between DNA methylation and age dependent gene expression was found for various transcription factors (i.a. OTX2, AR and FOS) involved in neurodevelopment. Additionally, genomic regions featured by age dependent differential methylation in differentially expressed genes were significantly enriched for specific transcription factor binding motifs. Incomplete dosage compensation was found to be largely responsible for sexually dimorphic gene expression, with dosage compensation increasing throughout life. In conclusion, our results indicate that DNA methylation regulates neurodevelopmental gene expression dynamics through steering transcription factor activity, but does not explain sexually dimorphic gene expression patterns in zebra finch telencephalon.

ORGANISM(S): Taeniopygia guttata

PROVIDER: GSE147972 | GEO | 2021/04/07

REPOSITORIES: GEO

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DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon [RRBS]

Project description:Song learning in zebra finches is a prototypical example of a complex learned behavior, yet knowledge on the underlying molecular processes is limited. Therefore, we characterized transcriptomic (RNA sequencing) and epigenomic (RRBS, reduced representation bisulfite sequencing; immunofluorescence) dynamics in matched zebra finch telencephalon samples of both sexes from 1 day post hatching (1 dph) to adulthood, spanning the critical period for song learning (20 dph and 65 dph). We identified extensive transcriptional neurodevelopmental changes during postnatal telencephalon development. DNA (hydroxy)methylation was very low, yet increased over time, particularly in song control nuclei. Only a small fraction of the massive differential expression in the developing zebra finch telencephalon could be explained by differential CpG and CpH DNA methylation. However, a strong association between DNA methylation and age dependent gene expression was found for various transcription factors (i.a. OTX2, AR and FOS) involved in neurodevelopment. Additionally, genomic regions featured by age dependent differential methylation in differentially expressed genes were significantly enriched for specific transcription factor binding motifs. Incomplete dosage compensation was found to be largely responsible for sexually dimorphic gene expression, with dosage compensation increasing throughout life. In conclusion, our results indicate that DNA methylation regulates neurodevelopmental gene expression dynamics through steering transcription factor activity, but does not explain sexually dimorphic gene expression patterns in zebra finch telencephalon.

2021-04-07 | GSE147973 | GEO

DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon

Project description:DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon

| PRJNA622686 | ENA

DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon [RRBS]

Project description:DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon [RRBS]

| PRJNA622689 | ENA

DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon [RNA-Seq]

Project description:DNA methylation regulates transcription factor specific neurodevelopmental but not sexually dimorphic gene expression dynamics in zebra finch telencephalon [RNA-Seq]

| PRJNA622690 | ENA

Sex bias and dosage compensation in the zebra finch versus chicken genomes: general and specialized patterns among birds

Project description:We have performed a comparison of global patterns of gene expression between two bird species, the chicken and zebra finch, especially with regard to sex bias of autosomal vs. Z chromosome genes, dosage compensation and evolution of sex bias. Both species appear to lack a Z chromosome-wide mechanism of dosage compensation, because both have a similar pattern of significantly higher expression of Z genes in males relative to females. Unlike the chicken Z chromosome, which has female-specific expression of the non-coding RNA MHM (male hypermethylated), and acetylation of histone 4 lysine 16 (H4K16) near MHM, the zebra finch Z chromosome appears to lack the MHM sequence and acetylation of H4K16. The zebra finch also does not show the reduced male to female (M:F) ratio of gene expression near MHM similar to that found in the chicken. Although the M:F ratios of Z chromosome gene expression are similar across tissues and ages within each species, they differ between the two species. Z genes showing the greatest species difference in M:F ratio were concentrated near the MHM region of the chicken Z chromosome. The current study shows that the zebra finch differs from the chicken because it lacks a specialized region of greater dosage compensation along the Z chromosome, and shows dosage compensation for a different set of Z genes than the chicken. These patterns suggest that different avian taxa may have evolved specific compensatory mechanisms. Experimental groups: Post-hatch Days 1, 25, 45, and 90+ for both Females and Males (d1_F, d1_M, d25_F, d25_M, d45_F, d45_M, adult_F, adult_M). Biological replicates: 6 per group. One test developmental stage subject and one universal SoNG reference (pooled Taeniopygia guttata brain) per array.

2010-02-10 | E-GEOD-20035 | biostudies-arrayexpress

Sex bias and dosage compensation in the zebra finch versus chicken genomes: general and specialized patterns among birds

2010-02-11 | GSE20035 | GEO

Core and region enriched networks of behaviorally regulated genes: the singing epigenome

Project description:We queried a songbird brain to discover behaviorally regulated transcriptional mechanisms relevant for speech behavior. About 10% of zebra finch genes showed regulation during singing, and most were brain-region specific. We propose that the brain-regional diversity of the singing-regulated gene networks is derived both from differential combinatorial binding of transcription factors and the epigenetic state of these genes before singing begins. To test this hypothesis, we measured H3K27ac two brain regions that participate in song production. The examination of H3K27ac in two brain regions of zebra finch in singing and silent conditions

2014-12-08 | E-GEOD-63936 | biostudies-arrayexpress

A genome-wide search for epigenetically regulated genes in zebra finch using MethylCap-seq and RNA-seq

Project description:DNA methylation is tightly linked with gene expression regulation and has long been regarded a stable epigenetic mark in postmitotic cells. However, it recently became clear that postnatal brains appear to show stimulus-induced de novo CpG methylation or active demethylation related to neuronal plasticity. Due to striking homologies between the brains of birds and mammals, songbirds, especially the zebra finch, propose an attractive model for investigating the genome-wide DNA methylation profile and DNA methylation reconfiguration during brain development. In order to obtain a first genome-wide compendium of genes under putative DNA methylation control, we performed MethyCap-seq experiments on two recently cultured zebra finch cell lines, G266 and ZFTMA, also upon AZA-induced demethylation. First, the MethylCap-seq methodology in zebra finch was validated by comparison with RRBS generated data. Subsequently, quantitative analysis identified 30,700 significantly demethylated loci upon AZA-treatment. Further examination revealed enrichment of these regions in exons and promoters. To assess the influence of methylation on gene expression, RNA-seq experiments were performed. Comparison of the RNA-seq and MethylCap-seq results showed that at least 357 of the 3,457 AZA-upregulated genes are putatively regulated by methylation in the promoter region, for which a pathway analysis showed obvious enrichment for neurological networks. A subset of genes was validated using qPCR and CpG pyrosequencing. To our knowledge, this study provides the first genome-wide DNA methylation map of the zebra finch genome as well as a comprehensive set of genes of which transcription is under putative methylation control. MethylCap-seq and RNA-seq experiments were performed on DMSO- and AZA-treated zebra finch cell lines, i.e. G266 and ZFTMA. As a quality control, also an untreated ZFTMA sample was analyzed with MethylCap-seq and RRBS.

2015-12-10 | E-GEOD-61060 | biostudies-arrayexpress

A genome-wide search for epigenetically regulated genes in zebra finch using MethylCap-seq and RNA-seq

2015-12-10 | GSE61060 | GEO

Core and region enriched networks of behaviorally regulated genes: the singing epigenome

2014-12-08 | GSE63936 | GEO