qPCR and immunofluorescence analyses showed the ability of this construct to direct initial MSC and NMC lineage specification towards cardiomyogenesis: both MSCs and NMCs showed the expression of the cardiac transcription factor GATA-4, fundamental for early cardiac commitment.
Although the use of the targeting biohybrid NPs could enhance the specification towards the cell lines, it has a disadvantage due to the non-uniform distribution of NPs over the cell membrane, it is difficult to target the cell nucleus that is needed to cross the cell membrane and the nucleus membrane, and it could cause cytokinesis arrest, DNA damage, and result in apoptosis.
If Mbd3 shRNA cells show upregulated trophectodermal markers, an indication of greater potential for re-specification towards the trophectoderm lineage, we reasoned their capability to form primitive ectoderm, precursor of three germ layers, might be compromised.
Our previous results demonstrated that upregulation of Prox1a in the vPCV angioblasts or in their progeny determines their specification towards a lymphatic fate (Nicenboim et al., 2015).
These findings suggest that pocket protein expression and cell cycle exit are dispensible for cardiomyocyte specification towards a trabecular or conduction lineage.
Here, we examine the signals involved in CD4+ T cell specification towards each subset, interconnectedness of cytokine networks, impact of mTOR signaling, and cellular metabolism in lineage specification and provide a supplement describing techniques to study these processes.
Together, these data demonstrate that activin drives DE specification towards VF-like cells and then hepatic endoderm, which has the capacity to differentiate into cells displaying characteristics of fetal hepatocytes.
These results, in combination with the chemical genetics approach above, revealed that partial or complete loss of β-catenin and disruption of its transcriptional activity impair the ability of ESCs to both up-regulate and undergo specification towards a primitive-streak-like fate.
The first step of the Def-Hep protocol consisted of differentiating hESCs into DE cells, as described above, while the second step involved promoting DE specification towards the hepatic lineage using first activin alone for 3 days and then activin combined with BMP4 and FGF10.
