KMID : 0578320030150020164
|
|
Molecules and Cells 2003 Volume.15 No. 2 p.164 ~ p.175
|
|
Telemeres and Telomerase in Aging, Regeneration and Cancer
|
|
Djojosubroto, Meta Wulandari
Choi Yoon-Sik Lee Han-Woong Karl Lenhard Rudolph
|
|
Abstract
|
|
|
The finding that telomere shortening limits the replicative lifespan of primary human cells has fueled speculations that telomere shortening plays a role during aging and regeneration of tissues in vivo. Support for this hypothesis comes from studies showing telomere shortening in a variety of human tissues as a consequence of aging and chronic disease. Studies in telomerase-deficient mice have given first experimental support that telomere shortening limits the replicative potential of organs and tissues in vivo and have identified telomerase as a promising target to treat regenerative disorders induced by telomere shortening. A potential downside of such an approach could be the development of malignant tumors, which has been linked to reactivation of telomerase in human cancers. In telomerase-deficient mice, telomere shortening showed a dual role in tumorigenesis, enhancing the initiation of tumors by induction of chromosomal instability but inhibiting tumor progression by induction of DNA-damage responses. The success in using telomerase activation for the treatment of regenerative disorders could depend on which of the mechanisms of telomere shortening is dominantly effecting carcinogenesis.
|
|
KEYWORD
|
|
Aging, Chronic Disease, Regeneration, Telomere Shortening, Telomerase-Therapy
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|