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Intrathoracic Injection for the Study of Adult Zebrafish Heart
Published on: May 14, 2019
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Preconditioning boosts regenerative programmes in the adult zebrafish heart
Anne-Sophie de Preux Charles1, Thomas Bise2, Felix Baier2
1Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland anne-sophie.depreuxcharls@unifr.ch.
Open Biology
|July 22, 2016
Summary
Preconditioning protects the zebrafish heart by activating survival genes and promoting cardiomyocyte cell cycle reentry. This adaptive response enhances heart regeneration after injury, offering a new model for studying cardiac preconditioning.
Area of Science:
- Cardiovascular Biology
- Regenerative Medicine
- Zebrafish Models
Background:
- Preconditioning, a phenomenon involving exposure to non-lethal stimuli, enhances resistance to subsequent injury, particularly in the mammalian heart.
- While preconditioning reduces infarct size and dysfunction, the underlying mechanisms remain incompletely understood.
- The adult zebrafish possesses endogenous cardiomyocyte proliferative capacity, suggesting potential for studying heart regeneration.
Purpose of the Study:
- To establish and characterize two distinct models of cardiac preconditioning in adult zebrafish.
- To investigate the molecular and cellular responses of the zebrafish heart to preconditioning stimuli.
- To evaluate the impact of preconditioning on subsequent heart regeneration after cryoinjury.
Main Methods:
- Induction of cardiac preconditioning using either thoracotomy or sterile inflammation via intraperitoneal injection of immunogenic particles.
- Assessment of cardioprotective gene expression in response to preconditioning stimuli.
- Analysis of cardiomyocyte cell cycle reentry and myocardial architecture modifications.
- Evaluation of heart regeneration following cryoinjury in preconditioned and control zebrafish.
Main Results:
- Zebrafish hearts exhibited increased expression of cardioprotective genes following preconditioning.
- Preconditioning enhanced cardiomyocyte cell cycle reentry and led to long-term myocardial structural changes.
- Preconditioned zebrafish showed improved heart regeneration, including more effective cell cycle reentry and enhanced embryonic gene expression at injury sites.
- Preconditioning improved cell survival shortly after cryoinjury.
Conclusions:
- Antecedent stimuli induce adaptive responses in zebrafish, enhancing their capacity for heart regeneration.
- The adult zebrafish serves as a valuable model for studying the mechanisms of remote cardiac preconditioning and its effects on heart repair.
- This research opens new avenues for exploring preconditioning-induced cardioprotection and regenerative strategies.
