Extension of cell life-span and telomere length in animals cloned from senescent somatic cells - PubMed (original) (raw)
. 2000 Apr 28;288(5466):665-9.
doi: 10.1126/science.288.5466.665.
J B Cibelli, C Blackwell, V J Cristofalo, M K Francis, G M Baerlocher, J Mak, M Schertzer, E A Chavez, N Sawyer, P M Lansdorp, M D West
Affiliations
- PMID: 10784448
- DOI: 10.1126/science.288.5466.665
Extension of cell life-span and telomere length in animals cloned from senescent somatic cells
R P Lanza et al. Science. 2000.
Abstract
The potential of cloning depends in part on whether the procedure can reverse cellular aging and restore somatic cells to a phenotypically youthful state. Here, we report the birth of six healthy cloned calves derived from populations of senescent donor somatic cells. Nuclear transfer extended the replicative life-span of senescent cells (zero to four population doublings remaining) to greater than 90 population doublings. Early population doubling level complementary DNA-1 (EPC-1, an age-dependent gene) expression in cells from the cloned animals was 3.5- to 5-fold higher than that in cells from age-matched (5 to 10 months old) controls. Southern blot and flow cytometric analyses indicated that the telomeres were also extended beyond those of newborn (<2 weeks old) and age-matched control animals. The ability to regenerate animals and cells may have important implications for medicine and the study of mammalian aging.
Comment in
- In contrast to Dolly, cloning resets telomere clock in cattle.
Vogel G. Vogel G. Science. 2000 Apr 28;288(5466):586-7. doi: 10.1126/science.288.5466.586. Science. 2000. PMID: 10798984 No abstract available.
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