Telomerase activity in smooth‐muscle cells increases lifespan and extends telomeres. Telomerase activity in smooth‐muscle cells increases lifespan and.

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Mallory Demonch Biol 455 March 24, 2008

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Telomerase activity in smooth‐muscle cells increases lifespan and extends telomeres. Telomerase activity in smooth‐muscle cells increases lifespan and extends telomeres. (A) Stable infection of smooth‐muscle cells (SMCs) with a retroviral vector encoding the human telomerase reverse transcriptase subunit (hTERT) yielded hTERT‐SMCs (hT) that were positive for telomerase activity, whereas control uninfected SMCs (un) and vector‐infected SMCs (v) were negative. Human embryonic kidney cells that expressed hTERT (Armbruster et al., 2001) were used as a positive control (Ctl). (B) Southern hybridization shows telomere erosion in control uninfected (un) and vector‐infected (v) SMCs, whereas hTERT‐SMCs extend telomeres for at least 80 population doublings (PDs). (C) Control uninfected (un) and vector‐infected (v) SMCs senesced at PD 37, whereas hTERT‐SMCs grew until at least PD 100. The asterisk indicates the PCR internal control. HI, heat inactivated. J Andrew McKee et al. EMBO Rep. 2003;4:633-638 © as stated in the article, figure or figure legend