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Genome-wide DNA methylation analysis for cartilage tissues

ABSTRACT: We performed reduced representation bisulfite sequencing (RRBS) for cartilage tissues to compare sex differences of DNA methylation status of X chromosomes including the pseudoautosomal region.

ORGANISM(S): Homo sapiens

PROVIDER: GSE188375 | GEO | 2024/04/10

REPOSITORIES: GEO

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Laser Capture Microdissection-Reduced Representation Bisulfite Sequencing (LCM-RRBS) maps changes in DNA methylation associated with gonadectomy-induced adrenocortical neoplasia in the mouse

Project description:DNA methylation is a mechanism for long-term transcriptional regulation and is required for normal cellular differentiation. Failure to properly establish or maintain DNA methylation patterns leads to cell dysfunction and diseases such as cancer. Identifying DNA methylation signatures in complex tissues can be challenging due to inaccurate cell enrichment methods and low DNA yields. We have developed a technique called Laser Capture Microdissection-Reduced Representation Bisulfite Sequencing (LCM-RRBS) for the multiplexed interrogation of the DNA methylation status of CpG Islands and promoters. LCM-RRBS accurately and reproducibly profiles genome-wide methylation of DNA extracted from microdissected fresh frozen or formalin-fixed paraffin-embedded tissue samples. To demonstrate the utility of LCM-RRBS, we characterized changes in DNA methylation associated with gonadectomy-induced adrenocortical neoplasia in the mouse. Compared to adjacent normal tissue, the adrenocortical tumors showed reproducible gains and losses of DNA methylation at genes involved in cell differentiation and organ development. LCM-RRBS is a rapid, cost-effective, and sensitive technique for analyzing DNA methylation in heterogeneous tissues and will facilitate the investigation of DNA methylation in cancer and organ development. Laser capture microdissection-reduced representation bisulfite sequencing and reduced representation bisulfite sequencing on human blood leukocyte, human endometrial tumor, mouse liver tissue, and mouse normal and neoplastic adrenal tissue

2013-03-21 | E-GEOD-45361 | biostudies-arrayexpress

Genome-wide DNA methylation map of Zebrafish male and female brain

Project description:Using 2 male and 2 female zebrafish (pool of 6) brain samples, we generated base-resolution DNA methylation maps to document sex-specific epigenetic differences. Here we generated single-nucleotide resoultion DNA methylation map of 4 zebrafish brain samples using Reduced Representation Bisulfite Sequencing (RRBS)

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Project description:We generated two types of DNA methylation datasets (Reduced Representation Bisulfite Sequencing [RRBS] and custom methylation array) from a heterozygous HD knock-in mouse model. The heterozygous Htt knock-in line expressed one wildtype endogenous Htt allele and a second Htt allele with knock-in of human mHTT exon 1 with either approximately 190 CAG repeats (Q175) or 20 CAG repeats (Q20). For each genotype (Q175 and Q20) we analyzed two brain regions (striatum and cerebellum) from 8 mice each on the RRBS platform (N=32 RRBS samples). Our EWAS of mutant Htt gene status (i.e. Q175 status) across the two brain regions identified two genome-wide significant CpGs in Htt region. contributor: CHDI foundation

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Transcriptome analysis for knee cartilage tissues of adults and cultured finger chondrocytes of children

Project description:To evaluate sex differences of expression levels of X chromosomal genes, we performed transcriptome analysis for knee cartilage tissues and cultured finger chondrocytes.

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Comparison of genome-wide DNA methylation in MEFs derived from wildtype or estrogen receptor beta null mice using reduced representation bisulfite sequencing

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