However, a major challenge remains as to achieve fate control of stem cells in vitro with high specificity and yield.
Indeed, because partial inhibition of the Wnt-PCP pathway only affects the expression of Pax6 in the optic vesicle and not in the surface ectoderm, we believe that the developing eye relies on the Wnt-PCP-driven cell movements in the optic vesicle to keep its epithelial status at this developmental stage, which is in turn crucial to achieve its fate.
In a number of vertebrates, there is a core transcriptional hierarchy, which can explain some of the molecular decisions that retinal cells must make to achieve particular fates.
Love, Browne's novel tell us, lifts us up to achieve our destiny, and escape our fate.
Nonetheless, they doubt that humanity has achieved a rich or sufficiently articulated sense of a common fate such that far-reaching attempts to achieve greater global justice (for example, substantial redistribution from the rich to poor) could prove successful.
To investigate the potential of purified human pancreatic ductal cells to achieve an endocrine fate, we used an adenovirus-mediated transgenic system.
Thus, a changing external environment is neither essential, nor adequate, to achieve histogenetically appropriate fates (although it should be noted that environmental cues may nevertheless provide negative feedback to fine-tune the proportions of cells that acquire particular fates [ 13 15]).
BPTF depletion arrests cells at a previously undefined stage of epithelial differentiation that is associated with an incapacity to achieve the luminal cell fate.
Then, we assessed whether a less permissive environment would also allow the adult expanded progenitor duct cells to achieve an endocrine cell fate.
Although it does not resolve outstanding issues on this subject, it may help to achieve a better understanding of the fate of the precursors.
