Table 1 Telomere and telomerase in human stem cells
Cell type | Lineage | Growth | Telomerase | Telomere | Reference |
---|---|---|---|---|---|
Embryonic | All tissue | Unlimited | High | Maintained | |
Hematopoietic | Multipotent | Limited | Absent/low | Shortened | |
Mesenchymal | Multipotent/skeletal tissue | Limited/unlimited | Absent/low upregulated by stimuli | Shortened/maintained | (Izadpanah et al, 2006; Yanada et al, 2006; Zimmermann et al, 2003) |
Skin | Epidermis | Limited | Low | Shortened | |
Hair follicle | Hair | Limited | Low | Shortened | |
Intestinal crypt | Intestinal mucosa | Limited | Low | Shortened | |
Neuronala | Several neurons | Limited | Low/absent | Shortened | |
Pancreatica | Ductal epithelial | Limited | Absent | Shortened | |
Liver epithelial | Bi-potential | Limited (durable) | Low | Maintained/shortened | |
Cancer stem cell | Multipotent | Unlimited | High | Maintained |