A model of the microcephaly phenotype due to a mutation in CDK5RAP2 causes a premature transition from symmetric to asymmetric neuronal progenitor cell division with a consequent reduction of the progenitor pool, decreased neurons and reduced cell survival [ 35, 38].
While reduction of circulating progenitors and endothelial progenitor cells (EPCs) in diabetes is much likely caused by impaired mobilization from the bone marrow [ 7]. dysfunction of circulating pro-angiogenic cells (PACs) results from the adverse metabolic milieu of T2D [ 8].
Although it is not known if the reduction of endothelial progenitor cells represents a primary alteration in migraine or the consequence of migraine attacks, it might be possible that their alteration mediates the increased vascular risk.
Epidermis-specific deletion of Yap at early embryonic stage causes lethality, the skin of these mice is thinner and deficient in epidermal tissue, a notable reduction of both progenitor cells and proliferative basal cells are also observed (Schlegelmilch et al., 2011).
Recently, Fadini et al. suggested that diabetes is the most relevant risk factor associated with a reduction of endothelial progenitor cells [5], [6].
Like overexpression of Ubc9 wt, both Dome>Dap and Dome>p21 lead to reduction of the progenitor population (Fig. 6C F).
Over time, a competitive disadvantage of 126/OE at the HSC level results in a progressive reduction of the progenitor supply, leading to the collapse of hematopoietic output.
We have recently reported that reduction of circulating progenitor cells in diabetes is at least in part attributable to a bone marrow defect (8).
By gating on the GFP+ and GFP− cells, our results further suggest that the expansion of GMP and the reduction of other progenitor populations are substantially sustained by the transgene expressing population.
In addition to its roles in interneuron development and the patterning of developing mammalian brains and spinal cords (Griesel et al., 2006; Waclaw et al., 2006; Sahara et al., 2007; Li et al., 2011), it was also shown that the loss of Sp8 led to the reduction of the progenitor pool (Zembrzycki et al., 2007).
