5 results on '"Iole Pezzuto"'
Search Results
2. The conserved long non-coding RNA CARMA regulates cardiomyocyte differentiation
- Author
-
Parisa Aghagolzadeh, Iole Pezzuto, Fatemeh Movahedi, Panagiotis Chouvardas, Bahram M. Soltani, Hassan Ansari, Mohamed Nemir, Maryam Kay, Thierry Pedrazzini, Francesco Paolo Ruberto, and Hossein Baharvand
- Subjects
Gene knockdown ,Physiology ,RBPJ ,Notch signaling pathway ,Cell Differentiation ,Biology ,Embryonic stem cell ,Long non-coding RNA ,Cell biology ,Cell Line ,MicroRNAs ,Physiology (medical) ,microRNA ,Gene silencing ,Humans ,Myocytes, Cardiac ,RNA, Long Noncoding ,Cardiology and Cardiovascular Medicine ,Induced pluripotent stem cell - Abstract
Aims Production of functional cardiomyocytes from pluripotent stem cells requires tight control of the differentiation process. Long noncoding RNAs (lncRNAs) exert critical regulatory function in cell specification during development. In this study, we designed an integrated approach to identify lncRNAs implicated in cardiogenesis in differentiating human embryonic stem cells (ESCs). Methods and results We identified CARMA (CARdiomyocyte Maturation-Associated lncRNA), a conserved lncRNA controlling cardiomyocyte differentiation and maturation in human ESCs. CARMA is located adjacent to MIR-1-1HG, the host gene for two cardiogenic miRNAs: MIR1-1 and MIR-133a2, and transcribed in an antisense orientation. The expression of CARMA and the miRNAs is negatively correlated, and CARMA knockdown increases MIR1-1 and MIR-133a2 expression. In addition, CARMA possesses MIR-133a2 binding sites, suggesting the lncRNA could be also a target of miRNA action. Upon CARMA downregulation, MIR-133a2 target protein-coding genes are coordinately downregulated. Among those, we found RBPJ, the gene encoding the effector of the NOTCH pathway. NOTCH has been shown to control a binary cell fate decision between the mesoderm and the neuroectoderm lineages, and NOTCH inhibition leads to enhanced cardiomyocyte differentiation at the expense of neuroectodermal derivatives. Interestingly, two lncRNAs, linc1230 and linc1335, which are known repressors of neuroectodermal specification, were found upregulated upon Notch1 silencing in ESCs. Forced expression of either linc1230 or linc1335 improved ESC-derived cardiomyocyte production. These two lncRNAs were also found upregulated following CARMA knockdown in ESCs. Conclusions Altogether, these data suggest the existence of a network, implicating three newly identified lncRNAs, the two myomirs MIR1-1 and MIR-133a2 and the NOTCH signaling pathway, for the coordinated regulation of cardiogenic differentiation in ESCs. Translational perspective Cardiac dysfunction and heart failure develop secondary to a massive loss of cardiomyocytes in the damaged myocardium. Several avenues have been evaluated to promote regeneration following injury. Cell therapy for heart disease envisages the production of functional cardiomyocytes from differentiating pluripotent stem cells prior transfer into the injured heart muscle. Here, we report the functional characterization of CARMA, a lncRNA implicated in cardiogenesis. CARMA knockdown in differentiating human embryonic stem cells (ESCs) promotes cardiogenic commitment and cardiomyocyte differentiation. CARMA represents therefore a novel target for improving human ESC-derived cardiomyocyte production, and cell-based regenerative strategies for heart disease.
- Published
- 2021
3. CARMEN, a human super enhancer-associated long noncoding RNA controlling cardiac specification, differentiation and homeostasis
- Author
-
Blanche Schroen, Stephane Heymans, Iole Pezzuto, Samir Ounzain, Shi-Yan Ng, Michael Alexanian, Ferran Reverter, Giovanni Bussotti, Rudi Micheletti, Rory Johnson, Christine Gonzales, Isabelle Plaisance, Carme Arnan, Thierry Pedrazzini, Cedric Notredame, Roderic Guigó, Dario Cecchi, Cardiologie, MUMC+: MA Med Staf Spec Cardiologie (9), and RS: CARIM - R2 - Cardiac function and failure
- Subjects
Cellular differentiation ,Cardiac precursor cells ,Heart failure ,Biology ,Transcriptome ,Mice ,Body Patterning/genetics ,Cell Differentiation/genetics ,Cell Lineage/genetics ,Enhancer Elements, Genetic/genetics ,Heart/embryology ,Homeostasis/genetics ,Myocardium/pathology ,Polycomb Repressive Complex 2/metabolism ,RNA, Long Noncoding/genetics ,RNA, Long Noncoding/metabolism ,Stem Cells/cytology ,Transcriptome/genetics ,Super-enhancer ,Cardiac development ,microRNA ,Regulació genètica ,Animals ,Homeostasis ,Humans ,Cell Lineage ,Enhancer of Zeste Homolog 2 Protein ,Enhancer ,Molecular Biology ,Body Patterning ,Genetics ,Regulation of gene expression ,Gene Expression Profiling ,Myocardium ,Stem Cells ,Polycomb Repressive Complex 2 ,Gene Expression Regulation, Developmental ,Cell Differentiation ,Heart ,Super enhancer ,Long non-coding RNA ,Cell biology ,Gene regulation ,Enhancer Elements, Genetic ,Gene Knockdown Techniques ,biology.protein ,RNA ,RNA, Long Noncoding ,Cardiology and Cardiovascular Medicine ,PRC2 ,Long noncoding RNA - Abstract
Long noncoding RNAs (lncRNAs) are emerging as important regulators of developmental pathways. However, their roles in human cardiac precursor cell (CPC) remain unexplored. To characterize the long noncoding transcriptome during human CPC cardiac differentiation, we profiled the lncRNA transcriptome in CPCs isolated from the human fetal heart and identified 570 lncRNAs that were modulated during cardiac differentiation. Many of these were associated with active cardiac enhancer and super enhancers (SE) with their expression being correlated with proximal cardiac genes. One of the most upregulated lncRNAs was a SE-associated lncRNA that was named CARMEN, (CAR)diac (M)esoderm (E)nhancer-associated (N)oncoding RNA. CARMEN exhibits RNA-dependent enhancing activity and is upstream of the cardiac mesoderm-specifying gene regulatory network. Interestingly, CARMEN interacts with SUZ12 and EZH2, two components of the polycomb repressive complex 2 (PRC2). We demonstrate that CARMEN knockdown inhibits cardiac specification and differentiation in cardiac precursor cells independently of MIR-143 and -145 expression, two microRNAs located proximal to the enhancer sequences. Importantly, CARMEN expression was activated during pathological remodeling in the mouse and human hearts, and was necessary for maintaining cardiac identity in differentiated cardiomyocytes. This study demonstrates therefore that CARMEN is a crucial regulator of cardiac cell differentiation and homeostasis.
- Published
- 2015
4. A transcribed enhancer dictates mesendoderm specification in pluripotency
- Author
-
Ching-Chia Ting, Jasmin Kernen, Frédéric Burdet, Samir Ounzain, Damien Maison, Daniel Maric, Rudi Micheletti, Stephen L. Leib, Nathan J. Palpant, Isabelle Plaisance, Michael Alexanian, Stephen P. Jenkinson, Mark Ibberson, Mohamed Nemir, Dominic Villeneuve, Nouria Hernandez, Clayton E. Friedman, Iole Pezzuto, Thierry Pedrazzini, and Marco Mina
- Subjects
0301 basic medicine ,animal structures ,Science ,Cellular differentiation ,Induced Pluripotent Stem Cells ,General Physics and Astronomy ,610 Medicine & health ,Biology ,Article ,General Biochemistry, Genetics and Molecular Biology ,Cell Line ,Mesoderm ,Mice ,03 medical and health sciences ,Ectoderm ,Animals ,Humans ,Cell Lineage ,Epigenetics ,lcsh:Science ,Induced pluripotent stem cell ,Enhancer ,Gene ,Transcription factor ,Embryonic Stem Cells ,Genetics ,Neural Plate ,Multidisciplinary ,Gene Expression Profiling ,Gene Expression Regulation, Developmental ,Cell Differentiation ,General Chemistry ,Embryonic stem cell ,Cell biology ,Gene expression profiling ,Enhancer Elements, Genetic ,030104 developmental biology ,embryonic structures ,570 Life sciences ,biology ,lcsh:Q ,RNA, Long Noncoding - Abstract
Enhancers and long noncoding RNAs (lncRNAs) are key determinants of lineage specification during development. Here, we evaluate remodeling of the enhancer landscape and modulation of the lncRNA transcriptome during mesendoderm specification. We sort mesendodermal progenitors from differentiating embryonic stem cells (ESCs) according to Eomes expression, and find that enhancer usage is coordinated with mesendoderm-specific expression of key lineage-determining transcription factors. Many of these enhancers are associated with the expression of lncRNAs. Examination of ESC-specific enhancers interacting in three-dimensional space with mesendoderm-specifying transcription factor loci identifies MesEndoderm Transcriptional Enhancer Organizing Region (Meteor). Genetic and epigenetic manipulation of the Meteor enhancer reveal its indispensable role during mesendoderm specification and subsequent cardiogenic differentiation via transcription-independent and -dependent mechanisms. Interestingly, Meteor-deleted ESCs are epigenetically redirected towards neuroectodermal lineages. Loci, topologically associating a transcribed enhancer and its cognate protein coding gene, appear to represent therefore a class of genomic elements controlling developmental competence in pluripotency., Long noncoding RNAs (lncRNAs) are key regulators of lineage specification during development. Here, the authors investigate remodeling of enhancers and regulation of the lncRNA transcriptome during mesendoderm specification, and identify a pluripotent stage-specific transcribed enhancer controlling adoption of the mesendodermal cell fate.
- Published
- 2017
5. Functional importance of cardiac enhancer-associated noncoding RNAs in heart development and disease
- Author
-
Rory Johnson, Rudi Micheletti, Iole Pezzuto, Alexandre Sarre, Michael Alexanian, Frédéric Burdet, Dalit May, Christine Gonzales, Jérôme Dauvillier, Thierry Pedrazzini, Samir Ounzain, Razan Sheta, Matthew J. Blow, Len A. Pennacchio, and Mohamed Nemir
- Subjects
Polyadenylation ,Heart Diseases ,Long noncoding RNA (lncRNAs) ,Primary Cell Culture ,Gene Expression ,Muscle Proteins ,Heart failure ,Enhancer RNAs ,030204 cardiovascular system & hematology ,Biology ,Article ,Gene regulatory networks ,03 medical and health sciences ,Mice ,Cardiac development ,0302 clinical medicine ,Gene expression ,Enhancers ,Animals ,Humans ,Enhancer ,Gene ,Transcription factor ,Molecular Biology ,Cells, Cultured ,Embryonic Stem Cells ,030304 developmental biology ,Regulation of gene expression ,Genetics ,0303 health sciences ,Gene knockdown ,Gene Expression Regulation, Developmental ,Heart ,Gene regulation ,Enhancer Elements, Genetic ,RNA, Long Noncoding ,Long noncoding RNA (IncRNAs) ,Cardiology and Cardiovascular Medicine - Abstract
© 2014 . The key information processing units within gene regulatory networks are enhancers. Enhancer activity is associated with the production of tissue specific noncoding RNAs yet the existence of such transcripts during cardiac development has not been established. Using an integrated genomic approach we demonstrate that fetal cardiac enhancers generate long noncoding RNAs (lncRNAs) during cardiac differentiation and morphogenesis. Enhancer expression correlates with the emergence of active enhancer chromatin states the initiation of RNA polymerase II at enhancer loci and expression of target genes. Orthologous human sequences are also transcribed in fetal human hearts and cardiac progenitor cells. Through a systematic bioinformatic analysis we identified and characterized for the first time a catalog of lncRNAs that are expressed during embryonic stem cell differentiation into cardiomyocytes and associated with active cardiac enhancer sequences. RNA sequencing demonstrates that many of these transcripts are polyadenylated multi exonic long noncoding RNAs. Moreover knockdown of two enhancer associated lncRNAs resulted in the specific downregulation of their predicted target genes. Interestingly the reactivation of the fetal gene program a hallmark of the stress response in the adult heart is accompanied by increased expression of fetal cardiac enhancer transcripts. Altogether these findings demonstrate that the activity of cardiac enhancers and expression of their target genes are associated with the production of enhancer derived lncRNAs. •Fetal cardiac enhancers are transcribed generating enhancer derived lncRNAs.
- Published
- 2014
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.