Cal assistance and helpful SPDB chemical information comments. We appreciate the critical review from Dr. Erwei Song and suggestions from our reviewers.Author ContributionsConceived and designed the experiments: FY FS. Performed the experiments: WT JZ. Analyzed the data: WT SS. Contributed reagents/ materials/analysis tools: JZ WW. Wrote the paper: FY WT QL.MiR-27a as a Predictor of Invasive Breast Cancer
Cardiac valvulogenesis refers to the formation of valves in the heart, an evolutionary conserved mechanism in vertebrates that occurs at mid-gestation and results in the unidirectional flow of blood throughout the heart. Both the semilunar (aortic and pulmonary), and atrioventricular valves (Pleuromutilin tricuspid and mitral) are thought to arise from endocardial cells that undergo multiple processes governed by an array of growth factors, transcription factors, and extracellular proteins [1,2,3]. Endocardial cells destined to become valves undergo an epithelial to mesenchymal transformation (EMT) upon their stimulation by the TGFb and BMP2/4 growth factors secreted from the underlying myocardium [2]. This process of transformation is dependent on two signaling pathways from within the endocardial cells, specifically the Wnt and NOTCH pathways [4]. The mesenchymal cells will invade the cardiac jelly composed mainly of hyaluronic acid. These cells will undergo proliferation and subsequent differentiation into mature valves, a process that is subject to tight regulation by growth factors amongst which the vascular endothelial growth factor (VEGF). The final valve structure is made up of at least 2 leaflets (mitral has 2 while tricuspid has 3) composed mainly of endocardially-derived cells. The involvement of neural crest cells in semilunar but not 
atrioventricular valves formation is supported by conditionalknock-outs although neither myocardial nor neural crests cells are detected in the mature valves [2,3,5]. The final process of remodeling is governed mainly by apoptosis. Defects in any of the steps involved in valvulogenesis lead to the valvular congenital heart disease including Mitral and Tricuspid Atresia (MA and TA). These two conditions, which account for 1? of all congenital heart disease in humans, are still difficult to treat [6,7]. Some of the molecular pathways involved in valve formation have been unraveled through the unexpected phenotype encountered in mice lacking the Nfatc1 gene [8,9]. NFATC1 (Nuclear Factor for Activated T-Cells) belongs to the Rel/NF-kB family of transcription factors that were first described 1326631 as being key regulators of T-cells’ activation. Five members (NFATC1-5) are found in mammals; all playing different non-redundant roles during embryonic and postnatal development [10,11,12,13]. All five members share a conserved DNA-binding domain at the Cterminus of the protein that binds specifically to the consensus (A/ T)GGAAA sequence [14]. In addition, they harbor at the Nterminal region a series of conserved serine-proline residues (S/P) that when dephosphorylated unmasked a nuclear localization signal allowing the translocation of NFATC proteins from the cytoplasm to the nucleus [15,16,17,18]. All NFATC proteins except NFATC5 are dephosphorylated by the calcium dependent phosphatase calcineurin (PPP3CA/PPP3CB) at the N-terminus triggering the translocation process. Although NFATC proteinsNFATC1 and Tricuspid Atresiaare weak transactivators, their transcriptional potency is boosted through their interactions with different classes of transcri.Cal assistance and helpful comments. We appreciate the critical review from Dr. Erwei Song and suggestions from our reviewers.Author ContributionsConceived and designed the experiments: FY FS. Performed the experiments: WT JZ. Analyzed the data: WT SS. Contributed reagents/ materials/analysis tools: JZ WW. Wrote the paper: FY WT QL.MiR-27a as a Predictor of Invasive Breast Cancer
Cardiac valvulogenesis refers to the formation of valves in the heart, an evolutionary conserved mechanism in vertebrates that occurs at mid-gestation and results in the unidirectional flow of blood throughout the heart. Both the semilunar (aortic and pulmonary), and atrioventricular valves (tricuspid and mitral) are thought to arise from endocardial cells that undergo multiple processes governed by an array of growth factors, transcription factors, and extracellular proteins [1,2,3]. Endocardial cells destined to become valves undergo an epithelial to mesenchymal transformation (EMT) upon their stimulation by the TGFb and BMP2/4 growth factors secreted from the underlying myocardium [2]. This process of transformation is dependent on two signaling pathways from within the endocardial cells, specifically the Wnt and NOTCH pathways [4]. The mesenchymal cells will invade the cardiac jelly composed mainly of hyaluronic acid. These cells will undergo proliferation and subsequent differentiation into mature valves, a process that is subject to tight regulation by growth factors amongst which the vascular endothelial growth factor (VEGF). The final valve structure is made up of at least 2 leaflets (mitral has 2 while tricuspid has 3) composed mainly of endocardially-derived cells. The involvement of neural crest cells in semilunar but not atrioventricular valves formation is supported by conditionalknock-outs although neither myocardial nor neural crests cells are detected in the mature valves [2,3,5]. The final process of remodeling is governed mainly by apoptosis. Defects in any of the steps involved in valvulogenesis lead to the valvular congenital heart disease including Mitral and Tricuspid Atresia (MA and TA). These two conditions, which account for 1? of all congenital heart disease in humans, are still difficult to treat [6,7]. Some of the molecular pathways involved in valve formation have been unraveled through the unexpected phenotype encountered in mice lacking the Nfatc1 gene [8,9]. NFATC1 (Nuclear Factor for Activated T-Cells) belongs to the Rel/NF-kB family of transcription factors that were first described 1326631 as being key regulators of T-cells’ activation. Five members (NFATC1-5) are found in mammals; all playing different non-redundant roles during embryonic and postnatal development [10,11,12,13]. All five members share a conserved DNA-binding domain at the Cterminus of the protein that binds specifically to the consensus (A/ T)GGAAA sequence [14]. In addition, they harbor at the Nterminal region a series of conserved serine-proline residues (S/P) that when dephosphorylated unmasked a 
nuclear localization signal allowing the translocation of NFATC proteins from the cytoplasm to the nucleus [15,16,17,18]. All NFATC proteins except NFATC5 are dephosphorylated by the calcium dependent phosphatase calcineurin (PPP3CA/PPP3CB) at the N-terminus triggering the translocation process. Although NFATC proteinsNFATC1 and Tricuspid Atresiaare weak transactivators, their transcriptional potency is boosted through their interactions with different classes of transcri.
