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Differences between karyotypically normal and abnormal human embryonic stem cells.


ABSTRACT: OBJECTIVES:To compare different biological characteristics of human embryonic stem cells (HESCs) between those with normal and those with abnormal karyotype. MATERIALS AND METHODS:Culture-adapted HESCs (chHES-3) with abnormal karyotype were compared with karyotypically normal cells, with regard to pluripotency and differentiation capacity, ultrastructure, growth characteristics, gene expression profiles and signalling pathways. RESULTS:We found a new abnormal karyotype of HESCs. We observed that chHES-3 cells with normal and abnormal karyotypes shared similarities in expression markers of pluripotency; however, karyotypically abnormal chHES-3 cells had a tendency for differentiation towards ectoderm lineages and were easily maintained in suboptimal culturing conditions. Abnormal chHES-3 cells displayed relatively mature cell organelles compared to normal cells, and karyotypically abnormal chHES-3 cells had increased survival and population growth. Genes related to cell proliferation and apoptosis were up-regulated, but genes associated with genetic instability (p53, Rb, BRCA1) were down-regulated in the karyotypically abnormal cells. CONCLUSION:Karyotypically abnormal chHES-3 cells had a more developed capacity for proliferation, resistance to apoptosis and less genetic stability compared to normal chHES-3 cells and may be an excellent model for studying and characterizing initial stages that determine transition of embryonic stem cells into cancer stem cells.

SUBMITTER: Yang S 

PROVIDER: S-EPMC6495872 | biostudies-literature | 2010 Jun

REPOSITORIES: biostudies-literature

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Differences between karyotypically normal and abnormal human embryonic stem cells.

Yang S S   Lin G G   Tan Y-Q YQ   Deng L-Y LY   Yuan D D   Lu G-X GX  

Cell proliferation 20100601 3


<h4>Objectives</h4>To compare different biological characteristics of human embryonic stem cells (HESCs) between those with normal and those with abnormal karyotype.<h4>Materials and methods</h4>Culture-adapted HESCs (chHES-3) with abnormal karyotype were compared with karyotypically normal cells, with regard to pluripotency and differentiation capacity, ultrastructure, growth characteristics, gene expression profiles and signalling pathways.<h4>Results</h4>We found a new abnormal karyotype of H  ...[more]

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