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Premature termination of telomeric extension-PCR for detection of telomerase activity

Ran Chen, Ji Qian, Lijuan Wang, Yu-min Mao
2003 BioTechniques  
In this article, we report a simple, rapid, and efficient method to detect telomerase activity: the premature termination of telomeric extension-PCR (PTEP). Similar to the telomeric repeat amplification protocol (TRAP), this method is based on PCR amplification following the in vitro telomerase reaction, while the in vitro telomerase reaction here is prematurely, rather than randomly, terminated. Apart from this, the telomeric extension products are used as initial primers, instead of as
more » ... nstead of as templates, to trigger the amplification with a specially constructed plasmid DNA as the template that cannot be directly amplified with the telomerase primer. The end product is a specific 159-bp DNA fragment that reflects telomerase activity. Because its product can be clearly identified with routine agarose gel electrophoresis and ethidium bromide staining, PTEP allows even lesser-equipped laboratories to easily detect telomerase activity.
doi:10.2144/03351md03 pmid:12866416 fatcat:lsatonnm2bhvlfpwnrvfem3u3e