Key result
An in-house light-sheet microscope and customized computational analysis enabled the investigation of micro-structure and contractile function across the entire heart at single-cell resolution in zebrafish larvae.
Why the study?
Obtaining high-resolution and high-speed 4D images of the contracting zebrafish heart to assess cardiac architecture and contractility remains challenging.
A novel 4D light-sheet microscopy framework enables high-resolution, single-cell tracking of zebrafish cardiac contraction and architecture during morphogenesis and injury.
May advance zebrafish cardiac regeneration imaging; leaves open translation to mammalian models before clinical relevance.
Zebrafish is an intriguing model organism known for its remarkable cardiac regeneration capacity. Studying the contracting heart in vivo is essential for gaining insights into structural and functional changes in response to injuries. However, obtaining high-resolution and high-speed 4-dimensional (4D, 3D spatial + 1D temporal) images of the zebrafish heart to assess cardiac architecture and contractility remains challenging. In this context, an in-house light-sheet microscope (LSM) and customized computational analysis are used to overcome these technical limitations. This strategy, involving LSM system construction, retrospective synchronization, single cell tracking, and user-directed analysis, enables one to investigate the micro-structure and contractile function across the entire heart at the single-cell resolution in the transgenic Tg(myl7:nucGFP) zebrafish larvae. Additionally, we are able to further incorporate microinjection of small molecule compounds to induce cardiac injury in a precise and controlled manner. Overall, this framework allows one to track physiological and pathophysiological changes, as well as the regional mechanics at the single-cell level during cardiac morphogenesis and regeneration.
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Zhang et al. (2024) studied Cardiac contraction and regeneration. 4D light-sheet microscopy and customized computational analysis was evaluated on Micro-structure and contractile function across the entire heart at single-cell resolution. An in-house light-sheet microscope and customized computational analysis enabled the investigation of micro-structure and contractile function across the entire heart at single-cell resolution in zebrafish larvae.
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