Cultivation and differentiation change nuclear localization of chromosome centromeres in human mesenchymal stem cells

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Abstract

© 2015 Voldgorn et al. Chromosome arrangement in the interphase nucleus is not accidental. Strong evidences support that nuclear localization is an important mechanism of epigenetic regulation of gene expression. The purpose of this research was to identify differences in the localization of centromeres of chromosomes 6, 12, 18 and X in human mesenchymal stem cells depending on differentiation and cultivating time. We analyzed centromere positions in more than 4000 nuclei in 19 mesenchymal stem cell cultures before and after prolonged cultivation and after differentiation into osteogenic and adipogenic directions. We found a centromere reposition of HSAX at late passages and after differentiation in osteogenic direction as well as of HSA12 and HSA18 after adipogenic differentiation. The observed changes of the nuclear structure are new nuclear characteristics of the studied cells which may reflect regulatory changes of gene expression during the studied processes.

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Voldgorn, Y. I., Adilgereeva, E. P., Nekrasov, E. D., & Lavrov, A. V. (2015). Cultivation and differentiation change nuclear localization of chromosome centromeres in human mesenchymal stem cells. PLoS ONE, 10(3). https://doi.org/10.1371/journal.pone.0118350

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