Project description:Detection of DNA hypermethylation across all UCSC annotated CpG islands and refseq promoter sequences in neuroblatoma cell lines and neuroblastic tumors
Project description:MECP2-R270X transgenic mice (TG) and MECP2-G273X TG mice were generated in the Zoghbi Lab. These mice express the respective truncated form of MeCP2 tagged with GFP at the C-terminus from a transgenic human PAC containing all known regulatory sequences. These transgenes were maintained on a wild-type pure FVB background. For experiments each transgenic line was crossed by Mecp2 null mice (Mecp2 tm1.1Bird) on a pure 129SvEv background and the resulting male F1 hybrid progeny (FVB;129SvEv) that lacked endogenous MeCP2 expression but expressed either transgene (Mecp2 -/y; MECP2-R270X TG or Mecp2-/y; MECP2-G273X TG) were used for ChIP-Seq analysis. Whole brain from either the R270X mice (Mecp2 -/y; MECP2-R270X TG) or the G273X mice (Mecp2 -/y; MECP2-G273X TG) was formaldehyde crosslinked and purified chromatin was immunoprecipitated with anti-GFP antibody (Abcam ab6556). 2 samples: R270X (Mecp2 -/y; MECP2-R270X TG) and G273X (Mecp2 -/y; MECP2-G273X TG) both on an F1 (FVB;129SvEv) hybrid background
Project description:MECP2-R270X transgenic mice (TG) and MECP2-G273X TG mice were generated in the Zoghbi Lab. These mice express the respective truncated form of MeCP2 tagged with GFP at the C-terminus from a transgenic human PAC containing all known regulatory sequences. These transgenes were maintained on a wild-type pure FVB background. For experiments each transgenic line was crossed by Mecp2 null mice (Mecp2 tm1.1Bird) on a pure 129SvEv background and the resulting male F1 hybrid progeny (FVB;129SvEv) that lacked endogenous MeCP2 expression but expressed either transgene (Mecp2 -/y; MECP2-R270X TG or Mecp2-/y; MECP2-G273X TG) were used for ChIP-Seq analysis. Whole brain from either the R270X mice (Mecp2 -/y; MECP2-R270X TG) or the G273X mice (Mecp2 -/y; MECP2-G273X TG) was formaldehyde crosslinked and purified chromatin was immunoprecipitated with anti-GFP antibody (Abcam ab6556).
Project description:MECP2 duplication syndrome, a childhood neurological disorder characterized by autism, intellectual disability, motor dysfunction, anxiety and epilepsy, is caused by a duplication on chromosome Xq28 spanning the MECP2 gene that results in doubling of MeCP2 levels. MECP2 overexpression in mice causes neurobehavioral and electroencephalographic defects similar to those of human patients, but the gross anatomy of the brain remains unaffected. We hypothesized that MECP2 duplication syndrome would be reversible and tested two methods to restore MeCP2 levels to normal: conditional genetic recombination and antisense oligonucleotide therapy. Both approaches rescued molecular, physiological and behavioral features of adult symptomatic mice. Antisense therapy also restored normal MeCP2 levels in lymphoblastoid cells from MECP2 duplication patients, in a dose-dependent manner. Our data indicate that antisense oligonucleotides could provide a viable therapeutic approach for human MECP2 duplication syndrome as well as other disorders involving copy number gains.
Project description:Aim: to detect genes that are differentially transcribed in mouse MECP2 knockout fibroblasts over-expressing either of the two human MECP2 isoforms, MECP2_e1 or MECP2_e2. Methods: mouse Mecp2tm1.1Bird knockout fibroblast cell line was stably infected by lentiviral vectors over-expressing MECP2_e1, MECP2_e2, or eGFP. RNA extracted, and used for gene expression microarray analysis 3 biological replicates for MECP2_e1; 3 replicates for MECP2_e2; 3 replicates for eGFP as control; 3 replicates for MECP2_e1 with 9bp insertion mutation in N-terminal
Project description:MeCP2 globally regulates gene expression in the brain. One example is Growth-differentiation factor 11 (Gdf11), which is down-regulated upon loss of MeCP2 and up-regulated upon gain of MeCP2. To assess if MeCP2 binds near the Gdf11 locus we performed CUT&RUN for MeCP2 in Mecp2-knockout or MECP2-transgenic hippocampus. To assess if a repressive histone modification (H3K27me3) was concordantly changed we profiled H3k27me3 in these same matched tissues.
Project description:This SuperSeries is composed of the following subset Series: GSE24285: Genome-wide Analysis Reveals Mecp2-dependent Regulation of MicroRNAs in a Mouse Model of Rett Syndrome (mm8 chromosomal tiling arrays) GSE24286: Genome-wide Analysis Reveals Mecp2-dependent Regulation of MicroRNAs in a Mouse Model of Rett Syndrome (mm8 promoter tiling arrays) GSE24320: Genome-wide Analysis Reveals Mecp2-dependent Regulation of MicroRNAs in a Mouse Model of Rett Syndrome (high-throughput small RNA sequencing) Refer to individual Series
Project description:We compared gene expression changes in the cerebellum of mice lacking MeCP2 (Mecp2-null) and mice overexpressing MeCP2 (MECP2-transgenic). A group of postnatal neurodevelopmental disorders collectively referred to as MeCP2 disorders are caused by aberrations in the gene encoding methyl-CpG-binding protein 2 (MECP2). Loss of MeCP2 function causes Rett syndrome (RTT), whereas increased copy number of the gene causes MECP2 duplication or triplication syndromes. MeCP2 acts as a transcriptional repressor, however the gene expression changes observed in the hypothalamus of MeCP2 disorder mouse models suggest that MeCP2 can also upregulate gene expression. To determine if this dual role of MeCP2 extends beyond the hypothalamus, we studied gene expression patterns in the cerebellum of Mecp2-null and MECP2-Tg mice, modeling RTT and MECP2 duplication syndrome, respectively. We found that abnormal MeCP2 dosage causes alterations in the expression of hundreds of genes in the cerebellum. The majority of genes were upregulated in MECP2-Tg mice and downregulated in Mecp2-null mice, consistent with a role for MeCP2 as a modulator that can both increase and decrease gene expression. Interestingly, many of the genes altered in the cerebellum, particularly those increased by the presence of MeCP2 and decreased in its absence, were similarly altered in the hypothalamus. Keywords: Comparison of cerebellar gene expression data between Mecp2-null mice and Mecp2-transgenic mice