Induced pluripotent stem cells (iPSCs) are once mature cells that have been de-differentiated to become like the embryonic state (Thomson et al., 1998; Takahashi and Yamanaka, 2006; Takahashi et al., 2007; Yu et al., 2007; Maherali and Hochedlinger, 2008; Stadtfeld et al., 2008).
In this study, we demonstrate using TMA of 181 patients that Hsp27 expression and phosphorylation levels increase in moderately differentiated tumors to become uniformly highly expressed in metastatic samples.
The mechanisms that enable a somatic differentiated cell to become a pluripotent or totipotent cell, which can develop a root, shoot, or embryo, or repair damaged tissues, are unknown.
It was found that PU-Au promoted EPCs to become differentiated endothelial cells in vitro, confirmed by the increased expressions of CD31 and VEGF-R2 surface markers.
Proliferation in the progenitor/stem cell niches depends on Cdk4 activity, being carefully downregulated within the niche and increasing when the progenitor cell enters in the so-called transit-amplifying state to become differentiated [47].
Another plastid trait which has evolved as higher and lower plants became multi-cellular organisms with defined cell types, was for the plastid to become differentiated into different plastid types in different types of plant cell.
An alternative explanation to account for the lack of inter-oceanic differentiation in skipjack tuna and yellowfin tuna, is that the time since population expansion began has not been sufficient to allow for the populations to become differentiated.
Because we used IL-7 as a marker of MSC in this setting, it is possible that transferred MSC can spread to many tissues including inflamed colonic mucosa to become differentiated cells but lose expression of IL-7.
Genome-wide annotation data sets can be obtained in several cellular systems, mainly from primary cell cultures and transformed cell lines, while in the future, differentiated iPSCs are likely to become more prominent for this application 24.
In the first report of somatic cell reprogramming by Yamanaka's group, mouse fibroblasts, which represent terminally differentiated cells, were reprogrammed to become pluripotent-stem-cell-like cells (iPS cells) by the introduction of four transcription factors: two core ES cell factors (Oct4 and Sox2), Klf4 and c-Myc (Myc) [ 7].
