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Updated: Aug 20, 2025
Imaging Cleared Embryonic and Postnatal Hearts at Single-cell Resolution
Published on: October 7, 2016
Non-cardiomyocytes in the heart in embryo development, health, and disease, a single-cell perspective
Shuangyuan Ding1,2, Xingwu Zhang1, Hui Qiu3
1School of Medicine, Tsinghua University, Beijing, China.
Insights
Single-cell studies reveal non-cardiomyocytes are crucial for heart health and repair. Understanding these cells offers new therapeutic targets for cardiac diseases.
Area of Science:
- Cardiovascular Biology
- Cellular and Molecular Medicine
- Developmental Biology
Background:
- Recent single-cell atlases provide detailed insights into heart cell diversity during development, health, and disease.
- Non-cardiomyocytes (NCMs) constitute over 50% of the heart cell population and play vital roles.
Purpose of the Study:
- To review and categorize the composition and characteristics of cardiac non-cardiomyocytes (NCMs) based on recent single-cell studies.
- To compare NCM findings from human samples and mouse models in various cardiac contexts.
- To highlight the significance of NCMs in heart development, disease mechanisms, and potential therapeutic strategies.
Main Methods:
- Comprehensive review of recent single-cell sequencing studies of the heart.
- Categorization of non-cardiomyocyte cell types and their functional states.
- Comparative analysis of data from human and mouse cardiac single-cell datasets.
Main Results:
- Non-cardiomyocytes, including fibroblasts, endothelial cells, and immune cells, are essential for structural support, homeostasis, and repair.
- Single-cell analyses reveal the heterogeneity and dynamic states of NCMs in different cardiac conditions.
- Significant overlap and distinct differences exist in NCM populations between human and mouse hearts.
Conclusions:
- Non-cardiomyocytes are critical players in cardiac function, development, and disease, beyond their structural roles.
- Understanding NCM heterogeneity is key to deciphering heart disease mechanisms.
- Targeting NCMs presents promising therapeutic avenues for cardiac repair and regeneration.
Abstract:
Recent single-cell atlases of the heart gave unprecedented details about the diversity of cell types and states during heart development in health and disease conditions. Beyond a profiling tool, researchers also use single-cell analyses to dissect the mechanism of diseases in animal models. The new knowledge from these studies revealed that beating cardiomyocytes account for less than 50% of the total heart cell population. In contrast, non-cardiomyocytes (NCMs), such as cardiac fibroblasts, endothelial cells, and immune cells, make up the remaining proportion and have indispensable roles in structural support, homeostasis maintenance, and injury repair of the heart. In this review, we categorize the composition and characteristics of NCMs from the latest single-cell studies of the heart in various contexts and compare the findings from both human samples and mouse models. This information will enrich our understanding of the cellular basis of heart development and diseases and provide insights into the potential therapeutic targets in NCMs to repair the heart.
