title: Telomere terminal G/C strand synthesis: measuring telomerase action and C-rich fill-in.
abstract: Telomerase is present in most human cancers, and proliferative stem cells including germline cells. Telomerase plays an essential role in tumorigenesis by maintaining/elongating telomeric DNA, and thus preventing the telomere shortening that results in replicative senescence. Understanding telomerase action in vivo has important implication for both cancer and aging, but there are not robust methods for monitoring telomerase action. By combining a series of cell biological and biochemical approaches, and taking advantage of the enzyme DSN that specifically cuts double-stranded DNA and releases the telomeric overhangs, we have developed a method to monitor telomerase action during one cell cycle. Here, we describe this method using HeLa carcinoma cells as an example.
authors: Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
authors: Yong
authors: Y
authors: Zhao
authors: Jerry W
authors: JW
authors: Shay
authors: Woodring E
authors: WE
authors: Wright
mesh_terms: D003596:Cytosine / Q000378:metabolism*; D004247:DNA / Q000737:chemistry / Q000235:genetics; D006147:Guanine / Q000378:metabolism*; D006367:HeLa Cells; D006801:Humans; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics; D017422:Sequence Analysis, DNA / Q000379:methods*; D019098:Telomerase / Q000378:metabolism*; D016615:Telomere / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*
chemical_list: D006147:Guanine; D003596:Cytosine; D004247:DNA; D019098:Telomerase