A cloned rhesus monkey has survived for greater than two years and has led to “valuable insights” into the scientific course of, in keeping with specialists.
Scientists in China used a modified model of the identical method that was used to create Dolly the sheep, the world’s first cloned mammal.
Out of the 113 cloned embryos, 11 have been implanted into surrogate monkeys, however just one survived. It has been named ReTro.
The workforce mentioned that though the success price of manufacturing viable and wholesome clones is low – lower than 1% on this case – it pushes ahead the understanding of primate cloning.
The world’s first cloned monkeys – a pair of equivalent long-tailed macaques – have been created six years in the past by the identical researchers, led by Qiang Sun and Zhen Liu of the Chinese Academy of Sciences in Shanghai.
At that point, the researchers wished to create populations of genetically uniform monkeys that may very well be customised for analysis into human ailments.
It additionally raised main moral questions by bringing the world nearer to human cloning.
But specialists now say these fears “were entirely unfounded” and the effectivity of the cloning course of nonetheless stays low.
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Writing within the journal Nature Communications, the authors mentioned: “These discoveries provide valuable insights into the reprogramming mechanism of monkey SCNT and introduce a promising strategy for primate cloning.”
Commenting on the findings, Dr Lluis Montoliu, a researcher on the National Centre for Biotechnology in Spain, who was not concerned within the research, mentioned: “Both the cloning of macaques and rhesus monkeys demonstrate two things.
“First, it’s doable to clone primates.
“And second, no less important, it is extremely difficult to succeed with these experiments, with such low efficiencies, once again ruling out human cloning.”
Dolly made historical past practically three a long time in the past after being cloned at Edinburgh’s Roslin Institute.
It was the primary time scientists had managed to clone a mammal from an grownup cell, taken from the udder of a Finn Dorset sheep.
Since then many different mammals have been cloned utilizing the identical single-cell nuclear switch (SCNT) method, which includes transferring cell nucleus DNA to a donated egg cell that’s then prompted to turn into an embryo.
They embrace sheep, cattle, pigs, canines, cats, mice and rats and long-tailed monkeys.