Project description:In order to investigate the characteristics and mechanisms of embryonic stem cell derived exosomes attenuates transverse aortic constriction induced ventricular remodeling, the proteomic profiles of human embryonic stem cell derived exosomes were analysed by label-free quantification.
Project description:Human cardiomyocytes can be generated from human embryonic stem cells (hESCs) in vitro by a variety of methods, including co-culture with visceral endoderm-like cell lines and growth factor directed differentiation as monolayers or three-dimensional embryonic bodies. To enable the identification, purification and characterisation of human embryonic stem cell derived cardiomyocytes (CMs) and cardiac progenitor cells (CPCs), we introduced sequences encoding GFP into the NKX2-5 locus by homologous recombination. We found that NKX2-5GFP hESCs facilitate quantification of cardiac differentiation, purification of hESC-derived committed cardiac progenitor cells and cardiomyocytes and the standardization of differentiation protocols.
Project description:Profiling global gene expression of undifferentiated human embryonic stem cells, artificially derived cardiomyocytes, fetal ventricular cardiomyocytes, and adult ventricular cardiomyocytes to determine transcriptomic variation between these cell types. Total RNA extracted from 10 human samples representing four stages of cardiac development from undifferentiated stem cells to mature adult cardiac tissue.
Project description:Profiling global gene expression of undifferentiated human embryonic stem cells, artificially derived cardiomyocytes, fetal ventricular cardiomyocytes, and adult ventricular cardiomyocytes to determine transcriptomic variation between these cell types.
Project description:Cell-autonomous circadian oscillations strongly influence tissue physiology and pathophysiology of peripheral organs. Recent in vivo findings in the heart demonstrate that the circadian clock controls oscillatory gene expression programs in the adult myocardium. However, whether in vitro human embryonic stem (ES) cell-derived cardiomyocytes can establish circadian rhythmicity is unknown. Here we report that while undifferentiated human ES cells do not possess a functional clock, oscillatory expression of known core clock genes emerges during directed cardiac differentiation, with robust rhythms in day 30 cardiomyocytes. Our data reveal a stress related oscillatory network of genes that underlies a time-dependent response to doxorubicin, a frequently used anti-cancer drug with cardiotoxic side effects. These results provide a set of oscillatory genes that is relevant to functional cardiac studies and that can be deployed to uncover the potential contribution of the clock to other processes such as cardiac regeneration.
