Re: [escepticos] *** Raton MILAGRO

[Juan Antonio Rodríguez García <juanrod@xxxxxxxxxx>]

Ya lo saben, amigos, no olviden supervitaminarse y mineralizarse!!!

(perdón, lo tenía que decir; en mi casa no veo el Canal Nostalgia ;-)

Saludos,
Juan

----- Mensaje original -----
De: Ramón Ordiales <ramon@xxxxxxxxxxxx>
Fecha: Jueves, Septiembre 1, 2005 2:11 pm
Asunto: [escepticos] Raton MILAGRO
> http://www.theaustralian.news.com.au/common/story_page/0,5744,16417002%255E30417,00.html 
> 
> It's a miracle: mice regrow hearts 
> 
> August 29, 2005 
> SCIENTISTS have created "miracle mice" that can regenerate 
> amputated limbs or damaged vital organs, making them able to 
> recover from injuries that would kill or permanently disable 
> normal animals. 
> 
> The experimental animals are unique among mammals in their ability 
> to regrow their heart, toes, joints and tail. 
> 
> And when cells from the test mouse are injected into ordinary 
> mice, they too acquire the ability to regenerate, the US-based 
> researchers say. 
> 
> Their discoveries raise the prospect that humans could one day be 
> given the ability to regenerate lost or damaged organs, opening up 
> a new era in medicine. 
> 
> Details of the research will be presented next week at a 
> scientific conference on ageing titled Strategies for Engineered 
> Negligible Senescence, at Cambridge University in Britain. 
> 
> 
> 
> 
> The research leader, Ellen Heber-Katz, professor of immunology at 
> the Wistar Institute, a US biomedical research centre, said the 
> ability of the mice at her laboratory to regenerate organs 
> appeared to be controlled by about a dozen genes. 
> 
> Professor Heber-Katz says she is still researching the genes' 
> exact functions, but it seems almost certain humans have 
> comparable genes. 
> 
> "We have experimented with amputating or damaging several 
> different organs, such as the heart, toes, tail and ears, and just 
> watched them regrow," she said. 
> 
> "It is quite remarkable. The only organ that did not grow back was 
> the brain. 
> 
> "When we injected fetal liver cells taken from those animals into 
> ordinary mice, they too gained the power of regeneration. We found 
> this persisted even six months after the injection." 
> 
> Professor Heber-Katz made her discovery when she noticed the 
> identification holes that scientists punch in the ears of 
> experimental mice healed without any signs of scarring in the 
> animals at her laboratory. 
> 
> The self-healing mice, from a strain known as MRL, were then 
> subjected to a series of surgical procedures. In one case the mice 
> had their toes amputated -- but the digits grew back, complete 
> with joints. 
> 
> In another test some of the tail was cut off, and this also 
> regenerated. Then the researchers used a cryoprobe to freeze parts 
> of the animals' hearts, and watched them grow back again. A 
> similar phenomenon was observed when the optic nerve was severed 
> and the liver partially destroyed. 
> 
> The researchers believe the same genes could confer greater 
> longevity and are measuring their animals' survival rate. However, 
> the mice are only 18 months old, and the normal lifespan is two 
> years so it is too early to reach firm conclusions. 
> 
> Scientists have long known that less complex creatures have an 
> impressive ability to regenerate. Many fish and amphibians can 
> regrow internal organs or even whole limbs. 
> 
> The Sunday Times 
> 
>