PDLSCs are a population of tissue-specific MSCs that could be obtained very easily especially in periodontitis.
uNK cells are a phenotypically distinct population of tissue-resident immune cells that regulate vascular remodelling within the endometrium and decidua.
uNK cells are a phenotypically distinct population of tissue-resident immune cells that are abundant in secretory phase endometrium and first trimester decidua (King et al., 1991).
The Kupffer cells in the liver are the largest population of tissue-resident macrophages and largely contribute to inflammatory reactions in the liver.
Epithelial layers are thought to be maintained by a small population of tissue-specific adult somatic stem cells, which have the potential to produce all the different cell types present in the tissue they reside in.
The LG field would greatly benefit from an expression system for differentiated LG-hemocytes only (e.g. by inducible elimination of GAL4 in the earlier differentiated population of tissue hemocytes).
If we suppose that the basal cell population comprises the entire population of tissue-maintaining progenitor cells, from their proportion of the total lung epithelial cell population we can estimate ρ = 1/3, from which it follows that the progenitor cell loss/replacement rate is given by 2 rλ = 1.8 ± 0.4/year.
Thus, while there is evidence for a larger and more diverse T cell infiltrate in tumor compared to control tissues (P < 2.2 × 10−16, chi-squared test), these results suggest that a large proportion of tumor-associated T cells are bystanders, not readily distinguishable from the normal population of tissue resident T cells.
The increase in telomere length in quiescent/differentiated tissues could be related to prevention of stress-dependent telomere shortening (Sahin et al, 2011; Sharma et al, 2003), or to re-population of tissues by cells with longer telomeres (Hao et al, 2005).
Distinct populations of tissue macrophages also acquire context-specific functions that are important for normal tissue homeostasis.
Endothelial progenitor cells (EPCs) also exist within populations of tissue-resident endothelial cells [ 17].
