Scale space detector for analyzing spatiotemporal ventricular contractility and nuclear morphogenesis in zebrafish

Area of Science:

• Developmental Biology
• Biomedical Imaging
• Cardiovascular Research

Background:

• In vivo quantitative assessment is crucial for understanding congenital disorders.
• Fixed tissue analysis provides cellular insights but lacks spatiotemporal data and can introduce artifacts.
• Non-invasive imaging methods are needed to overcome current limitations.

Purpose of the Study:

• To demonstrate light sheet fluorescence microscopy (LSFM) as a non-invasive tool for 4D cardiac analysis in zebrafish.
• To introduce a scale and size-invariant feature detector for analyzing cardiomyocyte nuclei morphology.
• To characterize zebrafish ventricular contractility using advanced imaging and analysis techniques.

Main Methods:

• Utilized light sheet fluorescence microscopy (LSFM) for non-invasive, 4D optical sectioning of zebrafish hearts.
• Developed and applied a scale and size-invariant feature detector.
• Quantitatively assessed cardiac mechano-transduction and ventricular contractility.

Main Results:

• LSFM effectively revealed cardiac mechano-transduction in zebrafish without invasive procedures.
• The feature detector successfully analyzed individual morphology of fused cardiomyocyte nuclei.
• Zebrafish ventricular contractility was characterized using the developed methods.

Conclusions:

• LSFM is a powerful non-invasive tool for in vivo, 4D cardiac studies in zebrafish.
• The novel feature detector aids in detailed analysis of cardiomyocyte nuclei and cardiac function.
• This approach advances the study of congenital heart disorders and cardiac physiology.