Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA137309 | ENA |
REPOSITORIES: ENA
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Project description:Background: Cardiac transcription factors are master regulators during heart development. Recently, some were shown to transdifferentiate noncardiac mesoderm cells and cardiac fibroblasts into cardiomyocytes. However, the individual roles of each transcription factors in activating cardiac gene program have not been elucidated. We examined cardiac-specific and genome-wide gene expression in fibroblasts induced with cardiac transcription factors Nkx2.5 (N), Tbx5 (T), Gata4 (G), Myocardin (M) alone or different combinations. Methodology/Principal Findings: We applied different combinations of human Nkx2.5 (N), Tbx5 (T), Gata4 (G) and Myocardin (M) lentiviruses into 10T1/2 fibroblasts. Immunostaining and quantitative reverse transcription polymerase chain reaction (qRT-PCR) showed that N, T, G or M alone did not induce expression of cardiac marker genes M-NM-1-myosin heavy chain (M-NM-1MHC) and cardiac troponin T (cTnT). Only T+M and T+G+M combinations induced M-NM-1MHC and cTnT expression. Microarray-based gene ontology analysis revealed that T alone inhibited most genes involved in cardiac-related processes and activated genes involved in Wnt receptor signaling pathway and in aberrant processes. M alone inhibited genes involved in Wnt receptor signaling pathway and activated genes involved in cardiac-related processes and in aberrant processes. G alone inhibited genes involved in ectoderm development. T+G+M combination was the most effective activator of genes associated with cardiac-related processes including muscle cell differentiation, sarcomere, striated muscle contraction, regulation of heart contraction, and glucose metabolism and fatty acid oxidation (two significant forms of cardiomyocyte energy metabolism). And unlike T, M, G alone or T+M, T+G+M did not activate genes associated with aberrant processes. Conclusions: Tbx5, Gata4 and Myocardin play different roles in activating cardiac gene program and in avoiding aberrant gene program activation. The combination of T+G+M activated cardiac gene program and avoided aberrant gene program activation. Two weeks after doxycline induction, total RNA was isolated from 10T1/2-tTA cells infected with different combinations of Tbx5, Gata4, and Myocardin lentiviruses. Biological triplicated.
2012-11-30 | E-GEOD-27329 | biostudies-arrayexpress
Project description:Background: Cardiac transcription factors are master regulators during heart development. Recently, some were shown to transdifferentiate noncardiac mesoderm cells and cardiac fibroblasts into cardiomyocytes. However, the individual roles of each transcription factors in activating cardiac gene program have not been elucidated. We examined cardiac-specific and genome-wide gene expression in fibroblasts induced with cardiac transcription factors Nkx2.5 (N), Tbx5 (T), Gata4 (G), Myocardin (M) alone or different combinations. Methodology/Principal Findings: We applied different combinations of human Nkx2.5 (N), Tbx5 (T), Gata4 (G) and Myocardin (M) lentiviruses into 10T1/2 fibroblasts. Immunostaining and quantitative reverse transcription polymerase chain reaction (qRT-PCR) showed that N, T, G or M alone did not induce expression of cardiac marker genes α-myosin heavy chain (αMHC) and cardiac troponin T (cTnT). Only T+M and T+G+M combinations induced αMHC and cTnT expression. Microarray-based gene ontology analysis revealed that T alone inhibited most genes involved in cardiac-related processes and activated genes involved in Wnt receptor signaling pathway and in aberrant processes. M alone inhibited genes involved in Wnt receptor signaling pathway and activated genes involved in cardiac-related processes and in aberrant processes. G alone inhibited genes involved in ectoderm development. T+G+M combination was the most effective activator of genes associated with cardiac-related processes including muscle cell differentiation, sarcomere, striated muscle contraction, regulation of heart contraction, and glucose metabolism and fatty acid oxidation (two significant forms of cardiomyocyte energy metabolism). And unlike T, M, G alone or T+M, T+G+M did not activate genes associated with aberrant processes. Conclusions: Tbx5, Gata4 and Myocardin play different roles in activating cardiac gene program and in avoiding aberrant gene program activation. The combination of T+G+M activated cardiac gene program and avoided aberrant gene program activation.
2012-11-30 | GSE27329 | GEO
Project description:Congenital Heart Disease (CHD) accounts for 1% of birth defects, and while large-scale genetic studies have uncovered genes associated with CHDs, identifying causal mutations remains a challenge. We hypothesized that genetic determinants for CHDs could be found in the protein interactomes of GATA4 and TBX5, two cardiac transcription factors (TFs) associated with CHDs. Defining their interactomes in human cardiac progenitors via affinity purification-mass spectrometry and integrating the results with genetic data from the Pediatric Cardiac Genomic Consortium (PCGC) revealed an enrichment of de novo variants among proteins that interact with GATA4 or TBX5. A consolidative score designed to prioritize TF interactome members based on distinctive variant, gene and proband features identified numerous likely CHD-causing genes, including the epigenetic reader GLYR1. GLYR1 and GATA4 widely co-occupied cardiac developmental genes resulting in co-activation and the GLYR1 variant associated with CHD disrupted interaction with GATA4. This integrative proteomic and genetic approach provides a framework for prioritizing and interrogating the contribution of genetic variants in CHD and can be extended to other genetic diseases.
2022-07-05 | PXD022091 | Pride
Project description:FGF2, FGF10, and VEGF greatly promote cardiac reprogramming under defined serum-free conditions by enhancing the conversion of partially reprogrammed cells into fully reprogrammed functional iCMs. Fibroblasts can be directly reprogrammed into cardiomyocyte-like cells (iCMs) by overexpression of cardiac transcription factors, including Gata4, Mef2c, and Tbx5; however, this process is inefficient under serum-based culture conditions, in which the conversion of partially reprogrammed cells into fully reprogrammed functional iCMs has been a major hurdle. Here, we report that a combination of fibroblast growth factor (FGF) 2, FGF10, and vascular endothelial growth factor (VEGF), termed FFV, promoted cardiac reprogramming under defined serum-free conditions, increasing spontaneously beating iCMs by 100-fold compared with those under conventional serum-based conditions. Mechanistically, FFV activated multiple cardiac transcriptional regulators and converted partially reprogrammed cells into functional iCMs through the p38 mitogen-activated protein kinase and phosphoinositol 3-kinase/AKT pathways. Moreover, FFV enabled cardiac reprogramming with only Mef2c and Tbx5 through the induction of cardiac reprogramming factors, including Gata4. Thus, defined culture conditions promoted the quality of cardiac reprogramming, and this finding provides new insights into the mechanism of cardiac reprogramming.
2016-11-01 | GSE73839 | GEO
Project description:Direct reprogramming of fibroblasts into cardiomyocytes (CMs) represents a promising strategy to regenerate CMs lost after ischemic heart injury. Overexpression of GATA4, HAND2, MEF2C, TBX5, miR-1, and miR-133 (GHMT2m) along with transforming growth factor beta (TGFbeta) inhibition efficiently promotes reprogramming. However, the mechanisms by which TGFbeta; blockade promotes cardiac reprogramming remain unknown. Here, we identify interactions between the histone H3 lysine 27 trimethylation (H3K27me3), demethylase JMJD3, the SWI/SNF remodeling complex subunit BRG1, and cardiac transcription factors. Furthermore, canonical TGFbeta; signaling regulates the interaction between GATA4 and JMJD3. TGF-beta; activation impairs the ability of GATA4 to bind target genes and prevents demethylation of H3K27 at cardiac gene promoters during cardiac reprogramming. Finally, a mutation in GATA4 (V267M) exhibits reduced binding to JMJD3 and impaired cardiomyogenesis. Thus, we have identified an epigenetic mechanism wherein canonical TGFbeta; pathway activation impairs cardiac gene programming by interfering with GATA4-JMJD3 interactions.
2021-02-13 | GSE145290 | GEO
Project description:The overexpression of cardiac transcription factors, Gata4/Hand2/Tbx5, and Mef2c (GHT/M) has been indicated that directly reprogram cardiac fibroblasts (CFs) into induced cardiomyocytes (iCMs) in vivo, and improve cardiac function after MI in mice. Previous studies demonstrated in vivo reprogramming by using Sendai virus vectors. Here we show that in vivo reprogramming by using Adeno-associated virus (AAV) vectors. Additionally, we use Mef2cM3 (M3), a fusion of Mef2c with a strong MyoD transcriptional activation domain. RNA-seq revealed that directly cardiac reprogramming of GHT/M3 by AAV vector activated the cardiac program and concomitantly suppressed fibroblast and inflammatory signatures.
2024-09-05 | GSE246524 | GEO
Project description:Four transcription factors, GATA4, Hand2, MEF2C, Tbx5 (GHMT) activated cardiac gene expression in cardiac fibroblasts, suggesting that these factors are able to reprogram fibroblasts toward a cardaic cell fate. Total RNA isolated from adult cardiac fibroblasts transduced with empty retroviral vector or GHMT-retroviruses for 2, and 4 weeks.
2012-04-05 | E-GEOD-37057 | biostudies-arrayexpress
Project description:Genome-wide occupancy analysis of TBX5, NKX2-5 and GATA4 in differentiating WT, Nkx2-5KO (NKO), Tbx5KO (TKO) and Nkx2-5;Tbx5KO (DKO) cells at the cardiac precursor (CP) and cardiomyocyte (CM) differentiation stages. Analysis of TBX5, NKX2-5 and GATA4 occupancy a and gene expression in WT, Tbx5KO, Nkx2-5KO and DoubleKO precursor (CP) and mature (CM) in vitro differentiated cardiomyocytes.
2016-02-11 | GSE77548 | GEO
Project description:Four transcription factors, GATA4, Hand2, MEF2C, Tbx5 (GHMT) activated cardiac gene expression in cardiac fibroblasts, suggesting that these factors are able to reprogram fibroblasts toward a cardaic cell fate.
2012-04-06 | GSE37057 | GEO
Project description:Direct conversion of cardiac fibroblast into functional induced cardiomyocytes by forced expression of three cardiac transcription factors, Mef2c, Gata4, and Tbx5, holds great promise for regenerative medicine. Cardiac reprogramming consists of waves of transcription remodeling events, including the fast acquisition of cardiac program and the gradual loss of fibroblast program. However, how this transcription remodeling was driven by the upstream chromatin landscape is still unclear. In this study, we performed single-cell ATAC-seq on Day 3 cardiac reprogramming cells and unveiled networks of transcription factors (TFs) playing a pivotal role in the shift of chromatin accessibility during the early stage of cardiac reprogramming. Moreover, integration analysis of scRNA-seq and scATAC-seq lead to the identification of active TFs function as barriers to cardiac reprogramming.
2021-09-05 | GSE171525 | GEO