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• W2943440128 abstract "The inherent capacity of somatic cells to switch their phenotypic status in response to damage stimuli in vivo might have a pivotal role in ageing and cancer. However, how the entry-exit mechanisms of phenotype reprogramming are established remains poorly understood. In an attempt to elucidate such mechanisms, we herein introduce a stochastic model of combined epigenetic regulation (ER)-gene regulatory network (GRN) to study the plastic phenotypic behaviours driven by ER heterogeneity. To deal with such complex system, we additionally formulate a multiscale asymptotic method for stochastic model reduction, from which we derive an efficient hybrid simulation scheme. Our analysis of the coupled system reveals a regime of tristability in which pluripotent stem-like and differentiated steady-states coexist with a third indecisive state, with ER driving transitions between these states. Crucially, ER heterogeneity of differentiation genes is for the most part responsible for conferring abnormal robustness to pluripotent stem-like states. We formulate epigenetic heterogeneity-based strategies capable of unlocking and facilitating the transit from differentiation-refractory (stem-like) to differentiation-primed epistates. The application of the hybrid numerical method validates the likelihood of such switching involving solely kinetic changes in epigenetic factors. Our results suggest that epigenetic heterogeneity regulates the mechanisms and kinetics of phenotypic robustness of cell fate reprogramming. The occurrence of tunable switches capable of modifying the nature of cell fate reprogramming might pave the way for new therapeutic strategies to regulate reparative reprogramming in ageing and cancer." @default.
• W2943440128 created "2019-05-09" @default.
• W2943440128 creator A5043897907 @default.
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• W2943440128 date "2019-04-30" @default.
• W2943440128 modified "2023-10-18" @default.
• W2943440128 title "A multiscale model of epigenetic heterogeneity-driven cell fate decision-making" @default.
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• W2943440128 doi "https://doi.org/10.1371/journal.pcbi.1006592" @default.
• W2943440128 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6510448" @default.
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• W2943440128 hasPublicationYear "2019" @default.
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