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Contenido archivado el 2024-06-18

Cardiac fibrosis versus regeneration: lessons learned from the zebrafish

Objetivo

Myocardial infarction (MI) leading to ischemic heart disease is the most common cause of death worldwide. In mammals, MI results in the in the replacement of the damaged myocardium with a scar. However, other animals, such as teleost fish have a remarkable capacity to regenerate damaged tissue replacing it with newly formed tissue. Recently, a zebrafish model of MI has been established. Cryoinjury (CI) of 25% of the ventricle leads to massive cell death and the deposition of fibrotic tissue. While in mammals cardiac fibrosis is irreversible, in the zebrafish the scar regresses and the injured area is replaced by new cardiomyocytes. Although the regenerative capacity of the zebrafish heart was described a decade ago, little is known about its molecular mechanisms.
The aim of this project is to analyse the fate of myofibroblast during cardiac regeneration in the zebrafish. Only few apoptotic myofibroblasts are detected after CI leaving several questions unanswered as to what happens to these cells.
Another important aspect is to understand the molecular mechanisms behind cardiac regeneration in a MI-model in zebrafish. We will test if cardiac regeneration is accomplished by the re-expression of developmentally active genes. We will study the role of the transcription factor tbx1 (involved in cardiac development in zebrafish as well as in humans), which has been identified in a recent screen performed in the host group. We will also analyse the function of molecules secreted from the epicardium. This mesothelial layer has been recently shown to play a pivotal role during cardiac repair and, given its accessibility, poses an attractive target for therapeutic intervention.
In sum, this project will characterize how in zebrafish mechanisms driving cardiomyocyte proliferation and scar formation are outbalanced to allow cardiac regeneration and propose that the findings may ultimately contribute to future therapies for the improvement of human cardiovascular health.

Ámbito científico (EuroSciVoc)

Programa(s)

Tema(s)

Convocatoria de propuestas

FP7-PEOPLE-2012-IEF
Consulte otros proyectos de esta convocatoria

Régimen de financiación

MC-IEF - Intra-European Fellowships (IEF)

Coordinador

CENTRO NACIONAL DE INVESTIGACIONES CARDIOVASCULARES CARLOS III (F.S.P.)
Aportación de la UE
€ 173 370,60
Dirección
CALLE MELCHOR FERNANDEZ ALMAGRO 3
28029 Madrid
España
Región
Comunidad de Madrid Comunidad de Madrid Madrid
Tipo de actividad
Research Organisations
Enlaces
Coste total
Sin datos