A genome-wide relay of signalling-responsive enhancers drives hematopoietic specification
Edginton-White, B.; Maytum, A.; Kellaway, S. G.; Goode, D. K.; Keane, P.; Pagnuco, I.; Assi, S. A.; Ames, L.; Clarke, M. L.; Cockerill, P. N.; Gottgens, B.; Cazier, J.-B.; Bonifer, C.
Show abstract
Developmental control of gene expression critically depends on distal cis-regulatory elements including enhancers which interact with promoters to activate gene expression. To date no global experiments have been conducted that identify their cell type and cell stage-specific transcription stimulatory activity within one developmental pathway and in a chromatin context. Here, we describe a high-throughput method that identifies thousands of differentially active cis-elements able to stimulate a minimal promoter at five stages of hematopoietic progenitor development from embryonic stem cells, which can be adapted to any ES cell derived cell type. Exploring this new resource, we show that blood cell-specific gene expression is controlled by the concerted action of thousands of differentiation stage-specific sets of cis-elements which respond to cytokine signals that terminate at signalling responsive transcription factors. Our work presents a major advance in our understanding of developmental gene expression control in the hematopoietic system and beyond.
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