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Single-cell Resolution of Temporal Gene Expression during Heart Development #MMPMID27840107
Dev Cell 2016[Nov]; 39 (4): 480-90 PMID27840107show ga
Activation of complex molecular programs in specific cell lineages governs mammalian heart development, from a primordial linear tube to a four-chamber organ. To characterize lineage-specific, temporal-spatial developmental programs, we performed single-cell RNA sequencing of >1200 murine cells isolated at seven time points spanning E9.5 (primordial heart tube) to P21 (mature heart). Using unbiased transcriptional data we classified cardiomyocytes (CM), endothelial cells (EC), and fibroblast-enriched cells, thus identifying markers for temporal and chamber-specific developmental programs. Harnessing these datasets, we defined developmental ages of human and mouse pluripotent stem cell-derived CMs and characterized lineage-specific maturation defects in hearts of mice with heterozygous mutations in Nkx2.5 that cause human heart malformations. This spatial-temporal transcriptome analysis of heart development reveals lineage-specific gene programs underlying normal cardiac development and congenital heart disease.