A Mouse Lineage with Very Long Telomeres Exhibits Longer Life Span

In this study, the enhanced mice live somewhat longer than their unmodified peers, though not as much longer as is the case for the application of telomerase gene therapy. The mice do also exhibit reduced cancer risk, however. The scientists here class telomere shortening as a cause of aging, which is not a point universally agreed upon. Reductions in average telomere length in tissues looks much more like a downstream consequence of reduced stem cell activity than an independent mechanism. Researchers obtain the first mice born with hyper-long telomeres and show that it is possible to extend life without any genetic modification Given the relationship between telomeres and ageing - telomeres shorten throughout life, so older organisms have shorter telomeres - scientists launched a study generating mice in which 100% of their cells had hyper-long telomeres. The findings show only positive consequences: the animals with hyper-long telomeres live longer in better health, free from cancer and obesity. "This finding supports the idea that, when it comes to determining longevity, genes are not the only thing to consider. There is margin for extending life without altering the genes". Telomeres form the end of chromosomes, in the nucleus of each cell in the body. Their function is to protect the integrity of the genetic information in DNA. Whenever the cells divide the telomeres, they are shortened a little, so one of the main characteristics of ageing is the...
Source: Fight Aging! - Category: Research Authors: Tags: Medicine, Biotech, Research Source Type: blogs