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Updated: Apr 21, 2026

Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis

Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis

Published on: January 12, 2015

Time-resolved single-cell transcriptomics maps zebrafish heart development.

Marco Tarasco¹, Thomas Juan¹, Yousef Alayoubi²

¹Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany; DZHK German Centre for Cardiovascular Research, Partner Site Rhine-Main, Bad Nauheim, Germany; Cardio-Pulmonary Institute (CPI), Bad Nauheim, Germany.

|April 19, 2026

Summary

This summary is machine-generated.

This study presents a comprehensive zebrafish heart atlas, revealing new insights into cardiac cell proliferation and identifying key genes for heart development and function. This resource aids understanding of vertebrate heart formation.

Keywords:

CP: developmental biology atlas cardiomyocytes crosstalk development heart interactome proliferation scRNA-seq transcriptomics zebrafish

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Last Updated: Apr 21, 2026

Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis

Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis

Published on: January 12, 2015

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Isolation and Characterization of Single Cells from Zebrafish Embryos

Isolation and Characterization of Single Cells from Zebrafish Embryos

Published on: March 12, 2016

Area of Science:

Developmental Biology
Cardiovascular Research
Genomics

Background:

Cardiac development involves the formation of a multi-chambered organ from precursors.
A detailed analysis of zebrafish heart development across multiple stages using single-cell RNA sequencing is needed.

Purpose of the Study:

To create a comprehensive single-cell transcriptomic atlas of zebrafish heart development.
To identify novel cell types, proliferation dynamics, and gene markers throughout heart development.

Main Methods:

Single-cell RNA sequencing of over 34,000 zebrafish heart cells.
Analysis of ten developmental stages from 25 hours to 60 days post-fertilization.
Identification and subclustering of cardiac cell types and analysis of cell-cell interactions.

Main Results:

Detailed profiling of zebrafish heart development from early to late stages.
Discovery of distinct cardiomyocyte proliferation dynamics, including a peak at 14 days post-fertilization.
Identification of novel marker genes (e.g., bcam, kcnj14, kcnj5) for compact/trabecular cardiomyocytes and a specific pacemaker gene (kcnj3b).

Conclusions:

The zebrafish heart atlas provides a valuable resource for studying vertebrate heart development.
New insights into cardiac cell proliferation and gene regulation during heart formation were uncovered.
The identified genes offer potential targets for understanding and treating heart conditions.