Bespoke single cell molecular and tissue-scale analysis reveals mechanisms underpinning development and disease in complex developing cell populations
Strauss, M. E.; Ton, M.-L. N.; Mason, S.; Bagri, J.; Harland, L. T.; Imaz-Rosshandler, I.; Wilson, N.; Nichols, J.; Tyser, R. C.; Gottgens, B.; Marioni, J. C.; Guibentif, C.
Show abstract
Perturbation studies using gene knockouts have become a key tool for understanding the roles of regulatory genes in development and disease. Here we systematically characterise the knockout effects of the key developmental regulators T and Mixl1 in chimeric mouse embryos during gastrulation and organogenesis. We present a comprehensive and effective suite of statistical tools for systematic characterisation of effects at the level of differential abundance of cell types, lineage development, and gene dysregulation. Applying our computational approach to a novel chimera data set with Mixl1 knockout reveals a disruption in Epicardium development in the absence of Mixl1, characterized by lack of upregulation of the key transcription factor Tbx18 and the Wnt regulator Sfrp5, and by dysregulation of the recently identified juxta-cardiac field. Finally, we demonstrate the wider utility of our framework by applying it to published acute myeloid leukemia (AML) patient data, and show how different responses to therapy are reflected in changes in gene expression along the myeloid trajectory between healthy and AML patients.
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