In vivo studies have demonstrated that the epidermis is characterized by a defined differentiation-dependent expression of Claudins (Cldns), a family of tetraspan membrane proteins that comprise a major component of TJ fibrils essential to the structure and function of TJs [ 2- 6].
These findings would correlate with several other studies which have found that FGF primes cells, thus enabling them to become more chondrogenic when moved to a chemically defined differentiation media [ 16, 17].
Here, we describe a serum-free and defined differentiation procedure that can be used to generate pre-migratory PGCLCs from human ESCs and induced pluripotent stem cells (iPSCs).
We sought a fully xeno-free and chemically defined differentiation protocol, and tested growth on defined matrix surfaces including recombinant human vitronectin (VTN-N) and Synthemax33.
When these cells receive identical doses of defined differentiation inducing signals, only a small fraction of 'lineage primed' cells actually respond.
After expansion in each type of media, the cells were placed in chemically defined differentiation media to promote an adipogenic, osteogenic, chondrogenic or keratocyte phenotype.
These cells can be produced via chemically defined differentiation of human pluripotent stem cells in a matter of weeks and could theoretically be utilized directly for therapeutic purposes to replace damaged myocardium.
Furthermore, the TTF-derived ciNPCs could be induced to differentiate into GFAP+ astrocytes, Tuj1+/MAP2+ neurons and Olig2+/Mbp+ oligodendrocytes under defined differentiation conditions.
That defined differentiation of climate bands keeps the Polar Vortex swirling in the Arctic.
To generate large numbers of cardiomyocytes for these purposes, multiple serum-containing or chemically defined differentiation conditions for human pluripotetent stem cells (hPSCs) have been reported, including one previously published by our group6,7,8,9,10.
