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• W2057777301 startingPage "483" @default.
• W2057777301 abstract "The outermost layer of the vertebrate heart originates from migratory mesothelial cells (epicardium) that give rise to coronary vascular smooth muscles and fibroblasts. The role of the epicardium in myocardial morphogenesis and establishment of normal heart function is still largely unknown. Here, we use Drosophila to investigate non-autonomous influences of epicardial-like tissue surrounding the heart tube on the structural and functional integrity of the myocardium. It has previously been shown that during Drosophila heart formation, mesodermal expression of the homeobox transcription factor even-skipped (eve) is required for specification of a subset of non-myocardial progenitors in the precardiac mesoderm. These progenitors may share some similarities with the vertebrate epicardium. To investigate a non-autonomous epicardial-like influence on myocardial physiology, we studied the consequences of reduced mesodermal Eve expression and epi/pericardial cell numbers on the maturation of the myocardial heart tube, its contractility, and acquisition of a normal heart rhythm in the Drosophila model. Targeting the eve repressor ladybird early (lbe) with the minimal eve mesodermal enhancer efficiently eliminates the mesodermal Eve lineages. These flies exhibit defects in heart structure, including a reduction in systolic and diastolic diameter (akin to 'restrictive cardiomyopathy'). They also exhibit an elevated incidence of arrhythmias and intermittent asystoles, as well as compromised performance under stress. These abnormalities are restored by eve reexpression or by lbe-RNAi co-overexpression. The data suggest that adult heart function in Drosophila is likely to be modulated non-autonomously, possibly by paracrine influences from neighboring cells, such as the epi/pericardium. Thus, Drosophila may serve as a model for finding genetic effectors of epicardial-myocardial interactions relevant to higher organisms." @default.
• W2057777301 created "2016-06-24" @default.
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• W2057777301 creator A5061808340 @default.
• W2057777301 creator A5087552055 @default.
• W2057777301 creator A5087686332 @default.
• W2057777301 date "2009-04-01" @default.
• W2057777301 modified "2023-09-24" @default.
• W2057777301 title "Non-autonomous modulation of heart rhythm, contractility and morphology in adult fruit flies" @default.
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• W2057777301 doi "https://doi.org/10.1016/j.ydbio.2009.02.013" @default.
• W2057777301 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2829972" @default.
• W2057777301 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19233157" @default.
• W2057777301 hasPublicationYear "2009" @default.
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