Stable ES cell clones exhibiting human IGF-II mRNA and protein expression were studied vs ES cell clones without IGF-II overexpression in a standard in vitro differentiation system involving culture in "hanging drops" and observation of differentiation of the recovered embryoid bodies (EBs).
Pigment cells are particularly useful for studies requiring the observation of differentiation in living cells, for example, studies of commitment.
This contrasts strongly with the observation of differentiation at pericentromeric autosomal loci and elsewhere throughout the genome of M and S forms sampled from other African populations.
Although this report focused on LC differentiation, we have made similar observations for differentiation of interstitial DC from long-term doxorubicin-exposed hTERT-MUTZ3 cells (data not shown).
Two complementary hypotheses support our observations of increased differentiation, and hence selection, between agricultural populations.
This is consistent with observations of photoreceptor differentiation in hES cell-derived retinal progenitors.
Observations of elevated differentiation in certain genomic regions are consistent with adaptive divergence between the groups, indicating that they may respond differently to environmental variation.
Comparison of 3D-time-lapse observations of endodermal differentiation revealed that sgn3 is not able to progress from this 'string of pearls' stage, but only undergoes partial fusion of individual islands, leading to CASP1-GFP patches of heterogenous size.
Observations of trans-differentiation in tissue culture were initially regarded merely as the result of artificial manipulation, with no physiological correspondence.
The latter results are in agreement with previous observations that differentiation of embryoid bodies in the absence of external signals leads to the development of neural tissue (Watanabe et al., 2005; Wataya et al., 2008).
Our observation of neural differentiation of clinical specimens of PTs and their xenografts provided the first evidence for neural differentiation of malignant PTs.
