An understanding of the cell biology of cardiac progenitors, including their developmental origin, lineage markers, renewal pathways, differentiation triggers, microenvironmental niche, and mechanisms of homing and migration to the site of injury, will enable further refinement of therapeutic strategies to enhance clinically meaningful cardiac repair.
Many investigators have employed various methods to expand the HSCs; either by genetic/epigenetic approaches or by using specific compounds which affect self renewal pathways [19], [20], [21], [22].
Mel- 18 and Bmi-1 are two essential proteins in stem cell renewal pathways.
After gene set enrichment analysis revealed that concurrent promoter methylation, mutations, and differential gene expression impacted cell differentiation, proliferation, growth and renewal pathways we performed a review study of the most important, potentially impacted cancer pathways in HNSCC.
Several bcl-2 family member inhibitors are currently under development, JAK2/STAT5 inhibitors are currently being tested in clinical trials and self-renewal pathway inhibitors such as gamma-secretase inhibitors have been used clinically.
When Olig2, a differentiation-inducing signal, was overexpressed, this led to lineage-specific differentiation of neural stem cells and downregulation of Wnt pathway (i.e., self-renewal pathway) as demonstrated by F3.Olig2.
The decline in the maintenance of the self-renewal pathway is considered one of the major mechanisms attributing to aging.
After genetic deregulation of the self-renewal pathway, liver stem cells may transform into cancer stem cells.
Self-renewal is an essential stem cell property, but self-renewal pathway activation has also been increasingly recognized as a hallmark of cancer.
CXCR4/CXCL12 growth stimulating effects were also detected in glioma stem cells via an AKT-mediated prosurvival and self-renewal pathway.
The latter niche role is specific to JAK/STAT signaling in CySCs and cannot be fulfilled by Hh signaling, another CySC self-renewal pathway (Amoyel et al, 2013).
