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The mammalian heart has a very limited regenerative capacity and, hence, heals by scar formation. Recent reports suggest that haematopoietic stem cells can transdifferentiate into unexpected phenotypes such as skeletal muscle, hepatocytes, epithelial cells, neurons, endothelial cells and cardiomyocytes, in response to tissue injury or placement in a new(More)
Studies on patients and large animal models suggest the importance of atrial fibrosis in the development of atrial fibrillation (AF). To investigate whether increased fibrosis is sufficient to produce a substrate for AF, we have studied cardiac electrophysiology (EP) and inducibility of atrial arrhythmias in MHC-TGFcys33ser transgenic mice (Tx), which have(More)
Cellular transplantation has emerged as a potential approach to treat diseased hearts. Although cell transplantation can affect global heart function, it is not known if this results directly via functional integration of donor myocytes or indirectly via enhanced revascularization and/or altered postinjury remodeling. To determine the degree to which donor(More)
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