Time-resolved single-cell state tracing exposes bidirectional state dynamics during differentiation
Gonzalez Sanchez, E.; Fabro, F.; Klavert, J.; Vroeg in de Wei, G.; Boers, J.; Tan, B.; van Leeuwen, M.; Sacchetti, A.; Bindels, E.; Boers, R.; Gribnau, J.; Creyghton, M.
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Differentiation dynamics have been challenging to study across time as measuring cell state, transcriptionally or epigenetically, typically requires its destruction. Here, we developed single-cell state tracing using the DCM-Time machine to enable the characterization of two transcriptomes, separated in time in single cells during epithelial cell differentiation in the intestine of living animals, and during neuronal differentiation in culture. We show that retrospective transcriptional histories and current states are consistent with bidirectional movements along differentiation trajectories both in vivo and in vitro that become rarer as cells mature. Furthermore, we observe rare transcriptome conversions, across canonical lineage boundaries. Our data support a model in which differentiating cells occasionally fail to stabilize lineage-associated programs, enabling reversals and subsequent resolution toward alternative lineage states.
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