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Human ES and iPS Cells Display Less Drug Resistance Than Differentiated Cells, and Naïve-State Induction Further Decreases Drug Resistance

By Yulia Panina, Junko Yamane, Kenta Kobayashi, Hideko Sone, Wataru Fujibuchi

Posted 17 Aug 2020
bioRxiv DOI: 10.1101/2020.08.17.253492

Pluripotent stem cells (PSCs) possess unique characteristics that distinguish them from other cell types. Human embryonic stem (ES) cells are recently gaining attention as a powerful tool for human toxicity assessment without the use of experimental animals, and an embryonic stem cell test (EST) was introduced for this purpose. However, human PSCs have not been thoroughly investigated in terms of drug resistance or compared with other cell types or cell states, such as naive state, to date. Aiming to close this gap in research knowledge, we assessed and compared several human PSC lines for their resistance to drug exposure. Firstly, we report that RIKEN-2A human induced pluripotent stem (iPS) cells possessed approximately the same sensitivity to selected drugs as KhES-3 human ES cells. Secondly, both ES and iPS cells were several times less resistant to drug exposure than other non-pluripotent cell types. Finally, we showed that iPS cells subjected to naive-state induction procedures exhibited a sharp increase in drug sensitivity. Upon passage of these naive-like cells in non-naive PSC culture medium, their sensitivity to drug exposure decreased. We thus revealed differences in sensitivity to drug exposure among different types or states of PSCs and, importantly, indicated that naive-state induction could increase this sensitivity.

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