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Author Spotlight: Advancing Cardiovascular Research — Tailored Langendorff Perfusion Techniques for Improved Experimental Outcomes
Published on: June 14, 2024
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A Langendorff-like system to quantify cardiac pump function in adult zebrafish
Hong Zhang1,2, Alexey V Dvornikov3, Inken G Huttner4,5
1Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55902, USA.
Disease Models & Mechanisms
|July 18, 2018
Summary
A new ex vivo technique allows researchers to measure adult zebrafish heart function, overcoming limitations of in vivo methods for cardiovascular research and drug testing.
Area of Science:
- Cardiovascular Biology
- Zebrafish Models
- Comparative Physiology
Background:
- Zebrafish are valuable vertebrate models for studying human cardiovascular diseases.
- Assessing adult zebrafish heart function is challenging due to lack of transparency.
- Existing in vivo methods like echocardiography require anesthesia and limit acute intervention studies.
Purpose of the Study:
- To develop and validate an ex vivo technique for quantifying adult zebrafish heart size and function.
- To establish optimal conditions for perfusing and stimulating isolated zebrafish hearts.
- To assess the impact of age and pharmacological agents on cardiac performance.
Main Methods:
- Developed an ex vivo Langendorff-like preparation for adult zebrafish hearts.
- Perfused hearts with a calcium-containing buffer and maintained beating with electrical stimulation.
- Evaluated ventricular performance under varying pacing, flow, and calcium concentrations.
Main Results:
- Defined optimal conditions for ex vivo heart perfusion and stimulation.
- Quantified cardiac function indices including volumes, ejection fraction, and strain.
- Demonstrated ability to detect drug-induced hypercontractile and hypocontractile responses.
- Showed good correlation with in vivo echocardiography measurements.
Conclusions:
- The ex vivo beating heart preparation is a robust tool for adult zebrafish cardiac research.
- This technique expands the utility of adult zebrafish for studying cardiovascular disorders.
- It facilitates detailed analysis of cardiac function and response to interventions.
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