Telomere length maintenance in stem cell populations
نویسندگان
چکیده
منابع مشابه
Maintenance of stem cell populations in plants.
Flowering plants have the unique ability to produce new organs continuously, for hundreds of years in some species, from stem cell populations maintained at their actively growing tips. The shoot tip is called the shoot apical meristem, and it acts as a self-renewing source of undifferentiated, pluripotent stem cells whose descendents become incorporated into organ and tissue primordia and acqu...
متن کاملSingle-cell telomere-length quantification couples telomere length to meristem activity and stem cell development in Arabidopsis.
Telomeres are specialized nucleoprotein caps that protect chromosome ends assuring cell division. Single-cell telomere quantification in animals established a critical role for telomerase in stem cells, yet, in plants, telomere-length quantification has been reported only at the organ level. Here, a quantitative analysis of telomere length of single cells in Arabidopsis root apex uncovered a he...
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Genome-wide systematic screens in yeast have uncovered a large gene network (the telomere length maintenance network or TLM), encompassing more than 400 genes, which acts coordinatively to maintain telomere length. Identifying the genes was an important first stage; the next challenge is to decipher their mechanism of action and to organize then into functional groups or pathways. Here we prese...
متن کاملTelomere length, stem cells and aging.
Telomere shortening occurs concomitant with organismal aging, and it is accelerated in the context of human diseases associated with mutations in telomerase, such as some cases of dyskeratosis congenita, idiopathic pulmonary fibrosis and aplastic anemia. People with these diseases, as well as Terc-deficient mice, show decreased lifespan coincidental with a premature loss of tissue renewal, whic...
متن کاملHomeostasis of telomere length rather than telomere shortening after allogeneic peripheral blood stem cell transplantation.
Hematopoietic reconstitution after stem cell transplantation requires excessive replicative activity because of the limited number of stem cells that are used for transplantation. Telomere shortening has been detected in hematopoietic cells after bone marrow transplantation. This has been thought to result from excessive replication of the stem cells, with putative concomitant reduction of thei...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease
سال: 2009
ISSN: 0925-4439
DOI: 10.1016/j.bbadis.2009.02.004