异种共生

经过被称作异种共生的这一步后，血管生长出来，两只老鼠的循环系统融合在了一起。

After this procedure , called parabiosis , blood vessels grew and joined the rats ' circulatory systems .

他们的团队在《科学》刊载的另一篇文章中指出，异种共生能刺激脑血管的生长。

In a second study in Science , the team reports that parabiosis spurred the growth of blood vessels in the brain .

比列达和同事发现，异种共生过程之后，老龄鼠海马体中的神经元长出了新的联结。

After parabiosis , Dr. Villeda and his colleagues found that the neurons in the hippocampus of the old mice sprouted new connections .

为了确定GDF11是不是对异种共生效应的关键因素，科学家制造了一些这种蛋白质，并将它注入老龄鼠体内。

To see if GDF11 was crucial to the parabiosis effect , the scientists produced a supply of the protein and injected it into old mice .

然后，除了异种共生之外，他们还移除了幼龄鼠血液中的细胞和血小板，再把剩下的血浆注入老龄鼠体内。

They then moved beyond parabiosis by removing the cells and platelets from the blood of young mice and injecting the plasma that remained into old mice .

经过被称作异种共生的这一步后，血管生长出来，两只老鼠的循环系统融合在了一起。幼龄鼠的血液流入了老龄鼠的体内，老龄鼠的血也流进了幼鼠。

After this procedure , called parabiosis , blood vessels grew and joined the rats ' circulatory systems . The blood from the young rat flowed into the old one , and vice versa .

他们对老鼠注射了单一的GDF11，然后发现它促进了脑部血管和神经元的生长，虽然相关变化并不像异种共生那么明显。

They injected GDF11 alone into the mice and found that it spurred the growth of blood vessels and neurons in the brain , although the change was not as large as that from parabiosis .