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The cardiovascular system, composed of the heart and vasculature, is essential for blood circulation, nutrient exchange, and waste removal. In the past, our understanding of cardiovascular development and function has largely been shaped by bulk tissue analyses, which obscures cellular heterogeneity. The emergence of single-cell omics has transformed the field by enabling unbiased transcriptional profiling of individual cells, revealing the diversity of stem cells and progenitor cells driving embryogenesis, resulting in the various mature cardiovascular cell types in the adult heart and vasculature. This technology has provided unprecedented insights into the molecular mechanisms governing cardiovascular development and function by identifying novel cell subpopulations, characterizing their unique properties, and tracing their temporal evolution through advanced analytical approaches. In this review, we discuss how single-cell omics has reshaped our understanding of cardiovascular developmental biology, highlight key analytical tools and emerging approaches, examine preclinical models that have facilitated these discoveries, and explore how these technologies have defined the cellular landscape of the heart and vasculature. We conclude by looking ahead to emerging technologies such as spatial transcriptomics and clonal barcoding for lineage tracing, as well as new strategies in addressing the gender gap in cardiovascular research.
Harper et al. (Fri,) studied this question.
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