Japan successfully cloned dead mouse cells

By cloning techniques, Japanese scientists have just succeeded in creating live versions of a long-dead mouse.

The rat died 16 years ago, but its body is preserved in a frozen environment. The experiment was carried out 11 years after British scientists shocked the world with the successful replication of Dolly sheep. After that many other animals were cloned, but people only use genetic material from living cells. This is the first time that successful cloning of dead animal scientists.

Previously, many experts thought that ice crystals would destroy DNA in chilled cells . So before they store cells in a frozen environment, scientists often treat them with cryoprotectant chemicals to prevent damage.

The mouse died 16 years ago.(Photo: Daily Mail)

But the research group of the Center for Development Biology in Kobe City (Japan) did not do so. They tried to use cells in other parts of the mouse to clone, but failed. Finally, they chose brain cells because they believed that high levels of fat in brain tissue prevented DNA from being damaged. They separate the cells of the cells (where DNA is stored) and implant them into a disc shaped egg cell of a living mouse.

Due to being " stimulated " by electricity, egg cells begin to divide and develop into embryos. After only a few days the embryo is implanted in the uterus of a female mouse. The next three weeks the baby mouse is born. " Humanized mice don't have unusual and growing symptoms ," said Dr. Teruhiko Wakayama, the lead researcher.

According to scientists, even when using brain cells, the probability of success in replication cases is still very low. According to statistics, experts across the planet once conducted more than 1,100 cases of animal cloning, but only created seven live versions. More than 500 embryos die after being implanted in their womb.

Descendants of dead mice.(Photo: PA / Daily Mail)

" Cloning techniques have a high failure rate because many eggs and fetuses are not developing properly. Therefore, scientists have not thought about the possibility of applying this technique on the human body ," Helen Wallace, a specialist a cloned member of the Genewatch organization in the UK, said.

The research team affirmed their results will bring many benefits to people. For example, scientists can use their technique to revive extinct animals that are preserved intact in ice, such as tigers and mammoths.