We propose a tight coupling of morphogenesis with cell determination by inductive signals derived from the surface ectoderm to explain the successive spreading of retinal differentiation from the center to the periphery (Sinn and Wittbrodt, 2013).
Clarification of the mechanisms of the virus spread and differentiation by study of the relationship between genetic, geographical and temporal variability of PRRSV may help in the development of better strategies to control the PRRSV spread.
In LIF− conditions for 5 days, the mESC colonies on 8 kPa substrates, similar to those on 3.5 kPa substrates, became much more spread and irregular, showing signs of differentiation (Fig. 4A), and significantly elevated their tractions and stiffness (Fig. 4C E), accompanied by diminishing Oct3/4 expression (Fig. 4B).
MMP-2 and MMP-9 have been considered as enzymes in degradation of the stroma and extracellular basement proteins to allow further differentiation and spread of endothelial cells during angiogenesis.
Spread of the disease, cell structure, differentiation and growth patterns have been used to classify tumors and to make a clinically relevant assessment of their metastatic potential.
These horizontally-transferred genes and pathways play important roles in processes ranging from the spread of antibiotic resistance to ecological differentiation (Forsberg et al., 2012; Shapiro et al., 2012).
In the third step, a combination of BMP4 (10 ng/ml), FGF2 (20 ng/ml) and Activin (30 or 100 ng/ml) was added, leading to spreading and differentiation of the colonies (Figure 3A).
For the DKO, spheres did not spread on the substrate and remained spherical indicating a lack of differentiation.
aEndometrial cancers are grouped by the grade (degree of differentiation), type (histopathological types) and stage (status of spread).
These include histological type, degree of differentiation, presence of an in situ component, evidence for metastatic spread and the interval between tumour onsets [ 3].
