Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Matrix Elasticity Does Not Affect Replicative Senescence or DNA Methylation Patterns of Mesenchymal Stem Cells

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

ORGANISM(S): Homo sapiens

SUBMITTER: Wolfgang Wagner

PROVIDER: E-GEOD-55889 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Matrix elasticity, replicative senescence and DNA methylation patterns of mesenchymal stem cells.

Schellenberg Anne A Joussen Sylvia S Moser Kristin K Hampe Nico N Hersch Nils N Hemeda Hatim H Schnitker Jan J Denecke Bernd B Lin Qiong Q Pallua Norbert N Zenke Martin M Merkel Rudolf R Hoffmann Bernd B Wagner Wolfgang W

Biomaterials 20140510 24

Matrix elasticity guides differentiation of mesenchymal stem cells (MSCs) but it is unclear if these effects are only transient - while the cells reside on the substrate - or if they reflect persistent lineage commitment. In this study, MSCs were continuously culture-expanded in parallel either on tissue culture plastic (TCP) or on polydimethylsiloxane (PDMS) gels of different elasticity to compare impact on replicative senescence, in vitro differentiation, gene expression, and DNA methylation ( ...[more]

PMID: 24824582

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Project description:Background: Low birth weight is associated with an increased adult metabolic disease risk. It is widely discussed that poor intrauterine conditions could induce long-lasting epigenetic modifications, leading to systemic changes in regulation of metabolic genes. In a unique cohort of 17 monozygotic (MZ) monochorionic female twins very discordant for birth weight (relative differences ranging from 21.3-35.7%), we examined if adverse prenatal growth conditions experienced by the smaller co-twins lead to systemic long-lasting DNA methylation changes. Genome-wide DNA methylation profiles were acquired from saliva DNA using the Infinium HumanMethylation450 BeadChip, targeting ~2% of all CpGs in the genome. Results: Overall, co-twins showed very similar genome-wide DNA methylation profiles. Since observed differences were almost exclusively caused by variable cellular composition, an original marker-based adjustment strategy was developed to eliminate such variation at affected CpGs. Among adjusted and unchanged CpGs 3153 were differentially methylated between the heavy and light co-twins at nominal significance (p<0.01), of which 45 showed absolute mean β-value differences >0.05 (max=0.08). Deep bisulfite sequencing of eight such loci revealed that differences remained in the range of technical variation, arguing against a reproducible biological effect. Analysis of methylation in repetitive elements using methylation-dependent primer extension assays also indicated no significant intra-pair differences. Conclusions: Severe intrauterine growth differences observed within these MZ twins are not associated with long-lasting DNA methylation differences in cells composing saliva, detectable with up-to-date technologies. Additionally, our results indicate that uneven cell type composition can lead to spurious results and should be addressed in epigenomic studies. DNA methylation profiles of saliva from 17 Adult Female MZ MC Twins discordant for birth weight.

Dataset Information

Matrix Elasticity Does Not Affect Replicative Senescence or DNA Methylation Patterns of Mesenchymal Stem Cells

Publications

Matrix elasticity, replicative senescence and DNA methylation patterns of mesenchymal stem cells.

Similar Datasets

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