Similar Datasets
Project description:Direct lineage conversion holds great promise in the regenerative medicine field for restoring damaged tissues using functionally engineered counterparts. However, current methods of direct lineage conversion, even those employing virus-mediated transgenic expression of tumorigenic factors, are extremely inefficient (~25%). Thus, advanced methodologies capable of revolutionizing efficiency and addressing safety issues are key to clinical translation of these technologies. Here, we propose an exosome-guided, non-viral, direct-lineage conversion strategy to enhance transdifferentiation of fibroblasts to induced cardiomyocyte-like cells (iCMs). Exosomes produced during the cardiac differentiation process of embryonic stem cells (ESCs) are able to achieve extremely high reprogramming efficiency (>60%) by generating functional iCMs from mouse embryonic fibroblasts via a cardiac precursor-like stage rather than a pluripotent state. The resulting iCMs possess typical cardiac Ca2+ transients and electrophysiological features, and exhibit global gene expression profiles similar to those of cardiomyocytes. The optimized reprogramming conditions produce beating iCM clusters ~3-fold more efficiently than conventional methods. This is the first demonstration of the use of exosomes derived from ESCs undergoing cardiac differentiation as biomimetic tools to induce direct cardiac reprogramming with greatly improved efficiency, establishing a general, more readily accessible platform for broadly generating a variety of specialized somatic cells through direct lineage conversion.
2022-03-02 | GSE166250 | GEO
Project description:Direct lineage conversion holds great promise in the regenerative medicine field for restoring damaged tissues using functionally engineered counterparts. However, current methods of direct lineage conversion, even those employing virus-mediated transgenic expression of tumorigenic factors, are extremely inefficient (~25%). Thus, advanced methodologies capable of revolutionizing efficiency and addressing safety issues are key to clinical translation of these technologies. Here, we propose an exosome-guided, non-viral, direct-lineage conversion strategy to enhance transdifferentiation of fibroblasts to induced cardiomyocyte-like cells (iCMs). Exosomes produced during the cardiac differentiation process of embryonic stem cells (ESCs) are able to achieve extremely high reprogramming efficiency (>60%) by generating functional iCMs from mouse embryonic fibroblasts via a cardiac precursor-like stage rather than a pluripotent state. The resulting iCMs possess typical cardiac Ca2+ transients and electrophysiological features, and exhibit global gene expression profiles similar to those of cardiomyocytes. The optimized reprogramming conditions produce beating iCM clusters ~3-fold more efficiently than conventional methods. This is the first demonstration of the use of exosomes derived from ESCs undergoing cardiac differentiation as biomimetic tools to induce direct cardiac reprogramming with greatly improved efficiency, establishing a general, more readily accessible platform for broadly generating a variety of specialized somatic cells through direct lineage conversion.
2022-03-02 | GSE166249 | GEO
Project description:Ultra-Efficient Exosome-Guided Direct Reprogramming of Fibroblasts into Functional Cardiomyocytes
| PRJNA699851 | ENA
Project description:Ultra-Efficient Exosome-Guided Direct Reprogramming of Fibroblasts into Functional Cardiomyocytes [Quant-seq]
| PRJNA699852 | ENA
Project description:Ultra-Efficient Exosome-Guided Direct Reprogramming of Fibroblasts into Functional Cardiomyocytes [miRNA-Seq]
| PRJNA699853 | ENA
Project description:Direct lineage conversion holds great promise in the regenerative medicine field for restoring damaged tissues using functionally engineered counterparts. However, current methods of direct lineage conversion, even those using virus-mediated transgenic expression of tumorigenic factors, are extremely inefficient (~25%). Thus, advanced methodologies capable of revolutionizing efficiency and addressing safety concerns are key to clinical translation of these technologies. Here, we propose an extracellular vesicle (EV)-guided, nonviral, direct lineage conversion strategy to enhance transdifferentiation of fibroblasts to induced cardiomyocyte-like cells (iCMs). The resulting iCMs have typical cardiac Ca2+ transients and electrophysiological features and exhibit global gene expression profiles similar to those of cardiomyocytes. This is the first demonstration of the use of EVs derived from embryonic stem cells undergoing cardiac differentiation as biomimetic tools to induce cardiac reprogramming with extremely high efficiency (>60%), establishing a general, more readily accessible platform for generating a variety of specialized somatic cells through direct lineage conversion.
| S-EPMC8880777 | biostudies-literature
Project description:The reprogramming of fibroblasts to induced pluripotent stem cells (iPSCs) raises the possibility that a somatic cell could be reprogrammed to an alternative differentiated fate without first becoming a stem/progenitor cell. A large pool of fibroblasts exists in the postnatal heart, yet no single "master regulator" of direct cardiac reprogramming has been identified. Here, we report that a combination of three developmental transcription factors (i.e., Gata4, Mef2c, and Tbx5) rapidly and efficiently reprogrammed postnatal cardiac or dermal fibroblasts directly into differentiated cardiomyocyte-like cells. Induced cardiomyocytes expressed cardiac-specific markers, had a global gene expression profile similar to cardiomyocytes, and contracted spontaneously. Fibroblasts transplanted into mouse hearts one day after transduction of the three factors also differentiated into cardiomyocyte-like cells. We believe these findings demonstrate that functional cardiomyocytes can be directly reprogrammed from differentiated somatic cells by defined factors. Reprogramming of endogenous or explanted fibroblasts might provide a source of cardiomyocytes for regenerative approaches.
| S-EPMC2919844 | biostudies-literature
Project description:The direct conversion, or transdifferentiation, of non-cardiac cells into cardiomyocytes by forced expression of transcription factors and microRNAs provides promising approaches for cardiac regeneration. However, genetic manipulations raise safety concerns and are thus not desirable in most clinical applications. The discovery of full chemically induced pluripotent stem cells suggest the possibility of replacing transcription factors with chemical cocktails. Here, we report the generation of automatically beating cardiomyocyte-like cells from mouse fibroblasts using only chemical cocktails. These chemical-induced cardiomyocyte-like cells (CiCMs) express cardiomyocyte-specific markers, exhibit sarcomeric organization, and possess typical cardiac calcium flux and electrophysiological features. Genetic lineage tracing confirms the fibroblast origin of these CiCMs. Further studies show the generation of CiCMs passes through a cardiac progenitor stage instead of a pluripotent stage. Bypassing the use of viral-derived factors, this proof of concept study lays a foundation for in vivo cardiac transdifferentiation with pharmacological agents and possibly safer treatment of heart failure.
| S-EPMC4559819 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2024-09-18 | GSE237621 | GEO
Project description:Conversion of fibroblasts to functional cardiomyocytes represents a potential approach for restoring cardiac function after myocardial injury, but the technique thus far has been slow and inefficient. To improve the efficiency of reprogramming fibroblasts to cardiac-like myocytes (iCMs) by cardiac transcription factors [Gata4, Hand2, Mef2c, and Tbx5 (GHMT)], we screened 192 protein kinases and discovered that Akt/protein kinase B dramatically accelerates and amplifies this process in three different types of fibroblasts (mouse embryo, adult cardiac, and tail tip). Approximately 50% of reprogrammed mouse embryo fibroblasts displayed spontaneous beating after 3 wk of induction by Akt plus GHMT. Furthermore, addition of Akt1 to GHMT evoked a more mature cardiac phenotype for iCMs, as seen by enhanced polynucleation, cellular hypertrophy, gene expression, and metabolic reprogramming. Insulin-like growth factor 1 (IGF1) and phosphoinositol 3-kinase (PI3K) acted upstream of Akt whereas the mitochondrial target of rapamycin complex 1 (mTORC1) and forkhead box o3 (Foxo3a) acted downstream of Akt to influence fibroblast-to-cardiomyocyte reprogramming. These findings provide insights into the molecular basis of cardiac reprogramming and represent an important step toward further application of this technique.
| S-EPMC4586885 | biostudies-literature