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Träfflista för sökning "WFRF:(Hansen Ninna Schiøler) ;pers:(Olsson Anders Henrik)"

Search: WFRF:(Hansen Ninna Schiøler) > Olsson Anders Henrik

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1.
  • Broholm, Christa, et al. (author)
  • Epigenome- and Transcriptome-wide Changes in Muscle Stem Cells from Low Birth Weight Men
  • 2020
  • In: Endocrine Research. - : Informa UK Limited. - 0743-5800 .- 1532-4206. ; 45:1, s. 58-71
  • Journal article (peer-reviewed)abstract
    • Background: Being born with low birth weight (LBW) is a risk factor for muscle insulin resistance and type 2 diabetes (T2D), which may be mediated by epigenetic mechanisms programmed by the intrauterine environment. Epigenetic mechanisms exert their prime effects in developing cells. We hypothesized that muscle insulin resistance in LBW subjects may be due to early differential epigenomic and transcriptomic alterations in their immature muscle progenitor cells. Results: Muscle progenitor cells were obtained from 23 healthy young adult men born at term with LBW, and 15 BMI-matched normal birth weight (NBW) controls. The cells were subsequently cultured and differentiated into myotubes. DNA and RNA were harvested before and after differentiation for genome-wide DNA methylation and RNA expression measurements. After correcting for multiple comparisons (q ≤ 0.05), 56 CpG sites were found to be significantly, differentially methylated in myoblasts from LBW compared with NBW men, of which the top five gene-annotated CpG sites (SKI, ARMCX3, NR5A2, NEUROG, ESRRG) previously have been associated to regulation of cholesterol, fatty acid and glucose metabolism and muscle development or hypertrophy. LBW men displayed markedly decreased myotube gene expression levels of the AMPK-repressing tyrosine kinase gene FYN and the histone deacetylase gene HDAC7. Silencing of FYN and HDAC7 was associated with impaired myotube formation, which for HDAC7 reduced muscle glucose uptake. Conclusions: The data provides evidence of impaired muscle development predisposing LBW individuals to T2D is linked to and potentially caused by distinct DNA methylation and transcriptional changes including down regulation of HDAC7 and FYN in their immature myoblast stem cells.
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2.
  • Broholm, Christa, et al. (author)
  • Human adipogenesis is associated with genome-wide DNA methylation and gene-expression changes
  • 2016
  • In: Epigenomics. - : Future Medicine Ltd. - 1750-1911 .- 1750-192X. ; 8:12, s. 1601-1617
  • Journal article (peer-reviewed)abstract
    • Aim: To define the genomic distribution and function of DNA methylation changes during human adipogenesis. Methods: We isolated adipocyte-derived stem cells from 13 individuals and analyzed genome-wide DNA methylation and gene expression in cultured adipocyte-derived stem cells and mature adipocytes. Results: We observed altered DNA methylation of 11,947 CpG sites and altered expression of 11,830 transcripts after differentiation. De novo methylation was observed across all genomic elements. Co-existence of genes with both altered expression and DNA methylation was found in genes important for cell cycle and adipokine signaling. Conclusion: Human adipogenesis is associated with significant DNA methylation changes across the entire genome and may impact regulation of cell cycle and adipokine signaling.
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