| Literature DB >> 24855509 |
Mi Jung Kim1, Min Hwan Kim2, Seung Ah Kim2, Jae Suk Chang3.
Abstract
Aging is the process of system deterioration over time in the whole body. Stem cells are self-renewing and therefore have been considered exempt from the aging process. Earlier studies by Hayflick showed that there is an intrinsic limit to the number of divisions that mammalian somatic cells can undergo, and cycling kinetics and ontogeny-related studies strongly suggest that even the most primitive stem cell functions exhibit a certain degree of aging. Despite these findings, studies on the effects of aging on stem cell functions are inconclusive. Here we review the age-related properties of hematopoietic stem cells in terms of intrinsic and extrinsic alterations, proliferative potential, signaling molecules, telomere and telomerase, senescence and cancer issues, regenerative potential and other indications of stem cell aging are discussed in detail.Entities:
Keywords: Aging; Hematopoietic stem cells; Phenotype shift; Proliferative potential
Year: 2008 PMID: 24855509 PMCID: PMC4021776 DOI: 10.15283/ijsc.2008.1.1.55
Source DB: PubMed Journal: Int J Stem Cells ISSN: 2005-3606 Impact factor: 2.500