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Distinct Gene Regulatory Dynamics Drive Skeletogenic Cell Fate Convergence During Vertebrate Embryogenesis [scATAC]

ABSTRACT: Distinct Gene Regulatory Dynamics Drive Skeletogenic Cell Fate Convergence During Vertebrate Embryogenesis [scATAC]

PROVIDER: PRJNA1185668 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR31328430_1.fastq.gz	Fastqsanger.gz
	SRR31328430_2.fastq.gz	Fastqsanger.gz
	SRR31328431_1.fastq.gz	Fastqsanger.gz
	SRR31328431_2.fastq.gz	Fastqsanger.gz

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Distinct Gene Regulatory Dynamics Drive Skeletogenic Cell Fate Convergence During Vertebrate Embryogenesis [scATAC]

Project description:Cell type repertoires have expanded extensively in metazoan animals, with some clade-specific cells being paramount to their evolutionary success. A prime example are the skeletogenic cells of vertebrates that form the basis of their developing endoskeletons. Depending on anatomical location, these cells originate from three different embryonic precursor lineages – the neural crest, the somites, and the lateral plate mesoderm – yet they converge developmentally towards similar cellular phenotypes. Furthermore, these lineages have gained ‘skeletogenic competency’ at distinct timepoints during vertebrate evolution, thus questioning to what extent different parts of the vertebrate skeleton rely on truly homologous cell types. Here, we investigate how lineage-specific molecular properties of the three precursor pools are integrated at the gene regulatory level, to allow for phenotypic convergence towards a skeletogenic cell fate. Using single-cell transcriptomics and chromatin accessibility profiling along the precursor-to-skeletogenic cell continuum, we examine the gene regulatory dynamics associated with this cell fate convergence. We find that distinct transcription factor profiles are inherited from the three precursor states, and that lineage-specific enhancer elements integrate these different inputs at the cis-regulatory level, to execute a core skeletogenic program. We propose a lineage-specific gene regulatory logic for skeletogenic convergence from three embryonic precursor pools. Early skeletal cells in different body parts thus share only a partial ‘deep homology’. This regulatory uncoupling may render them amenable to individualized selection, to help to define distinct morphologies and biomaterial properties in the different parts of the vertebrate skeleton.

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Distinct Gene Regulatory Dynamics Drive Skeletogenic Cell Fate Convergence During Vertebrate Embryogenesis [scRNA-Seq]

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Distinct Gene Regulatory Dynamics Drive Skeletogenic Cell Fate Convergence During Vertebrate Embryogenesis

Project description:Cell type repertoires have expanded extensively in metazoan animals, with some clade-specific cells being paramount to their evolutionary success. A prime example are the skeletogenic cells of the developing vertebrate endoskeleton. Depending on anatomical location, these cells originate from three different embryonic precursor lineages, yet they converge developmentally towards similar cellular phenotypes. Furthermore, these embryonic lineages have gained skeletogenic competency at distinct timepoints during vertebrate evolution, thus questioning to what extent different parts of the vertebrate skeleton rely on truly homologous cell types. Here, we investigate how lineage-specific molecular properties of the three precursor pools are integrated at the gene regulatory level, to allow for phenotypic convergence towards a skeletogenic cell fate. Using single-cell transcriptomics and chromatin accessibility profiling along the precursor-to-skeletogenic cell continuum, we examine the gene regulatory dynamics associated with this cell fate convergence. We find that distinct transcription factor profiles are inherited and integrated from the three precursor states, and that lineage-specific enhancer elements incorporate these different inputs at the cis-regulatory level. This lineage-specific gene regulatory logic for skeletogenic convergence from three embryonic precursor pools suggests that early skeletal cells in different body parts are distinct cell types. Their regulatory uncoupling may render them amenable to individualized selection, to help to define distinct morphologies and biomaterial properties in the different parts of the vertebrate skeleton.

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