Light Sheet Microscopy Imaging and Mounting Strategies for Early Zebrafish Embryos
Swetha Nagarajan1, Siddhartha Bardhan1, Sundar Ram Naganathan2
1Department of Biological Sciences, Tata Institute of Fundamental Research.
Journal of Visualized Experiments : Jove
|August 14, 2024
Summary
This protocol simplifies mounting zebrafish embryos for multiview light sheet microscopy. It details optimal imaging parameters and bead-based registration for high-resolution live imaging of early development.
Area of Science:
- Developmental Biology
- Microscopy Techniques
- Zebrafish Model Organism
Background:
- Light sheet microscopy is ideal for live imaging of zebrafish embryos due to low phototoxicity and long temporal scales.
- Multiview systems enhance imaging by allowing sample rotation for comprehensive embryo visualization.
- Current sample mounting methods for multiview imaging are often cumbersome, particularly for early developmental stages.
Purpose of the Study:
- To describe basic mounting strategies for imaging early zebrafish development (70% epiboly to early somite stages) using multiview light sheet microscopy.
- To provide guidance on optimal imaging parameters, including the number and interval of acquisition angles for whole embryo reconstruction.
- To detail a robust method for image registration using fiducial markers (beads) for accurate cellular-scale resolution.
Main Methods:
- Characterization of zebrafish embryo default positions within the chorion at 70% epiboly and bud stages.
- Determination of optimal multiview acquisition parameters (angles and intervals) for early zebrafish development.
- Implementation of bead-based image registration for aligning views of the entire embryo.
Main Results:
- Statistical data on natural embryo orientations at key early developmental stages are presented.
- Optimal imaging angles and temporal intervals are defined to achieve cellular-scale resolution after view fusion.
- A protocol for using external beads for precise image registration is successfully demonstrated.
Conclusions:
- The developed protocol streamlines the challenging sample mounting process for multiview light sheet microscopy of zebrafish embryos.
- Optimized imaging strategies and registration techniques enable high-fidelity, cellular-resolution 3D reconstruction of early embryonic development.
- This method facilitates advanced live imaging studies of dynamic developmental processes in zebrafish.
