The Oldest Mouse Contest

Shipud writes "Nature reports a contest that was launched in Britain today, to produce the oldest laboratory mouse. Current record in 5 years -- 150 in human years. From the page : ``Researchers can use any technique to boost longevity, including genetic manipulation and stem-cell therapy''. Winners will receive cash for every day beyond the current record. The Methuselah Mouse contest was created in an effort to boost research into human longevity."

Comments

Works by maintaining/increasing telomere length

[Gyan]

When DNA is replicated, the transcription occurs not from the start of a strand, but a few "words" into the sequence. Since, this might cut off valuable/active genes, there are telemores "prefixed" to the start of these sequence. These are useless bits of genes that can be safely cut off during cell copying. But as the instance of DNA gets copied more and more, in each succeeding generation, the telomere gets reduced. Eventually coming to the point where during copying, active genes get clipped. The limit is around 50 cell divisions, IIRC. Someone by the age of 60 has roughly 40% of telomere length as compared to birth. There's a gene called telomerase that synthesizes these telomeres at the ends of chromosones. Mice in which telomerase has been re-activated post-infancy have lived thrice as long!!! But there are ill-effects of activating telomerase post-infancy. Cancer tumors require telomerase to work as well. So, it's a double-edged sword. Hope someone figures out a good alternative.

Re:Why?

[SlamMan]

Having a grandfather who spent 4 years in a home after a stroke and a heart attack, I know exactly what you mean. I do wonder if thats not a very good representative sample though. There are hoards of elderly people that are just fine out in the world. I wonder if being treated as an invalid as most people in a home are is more a cause of dementia than a symptom.