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GRE双语阅读材料:干细胞治疗与器官再生

2018-04-14 14:55:00来源:网络

  Cultures without mesenchymal stem cells failed to form a cluster.

  实验证明,如果培养过程中缺少间充质干细胞,就不会形成簇集物;

  Those without endothelial cells failed to create a network of blood vessels.

  而如果没有内皮细胞,就无法形成血管网络。

  But together, the three types of cell, with little additional prodding, formed a bud within two days.

  只有将肝脏内胚层细胞与这两者结合,并配合少量的其他刺激,才最终能在两天内形成肝芽。

  At six days this bud was expressing genes known to be early markers of the liver.

  到了第六天,肝芽开始表达一些在肝脏早期形成阶段具有标志性的基因。

  And when Dr Takebe implanted such buds into the brains of mice whose immune systems had been disabled to prevent rejection, he observed that they connected with the mouse's blood system within two days.

  随后,武部博士将这些肝芽结构植入一些丧失免疫能力的老鼠的脑中,这样老鼠就不会对肝芽组织形成排斥反应。武部博士发现,两天内肝芽结构就与这些老鼠脑中的血液循环系统相互融合了。

  After two months the buds not only looked like liver, they acted like it.

  两个月后,肝芽结构除了看上去像肝脏外,也具有了肝脏的生理功能—他们产生出了肝脏独有的蛋白质。

  They produced liver-specific proteins. And if Dr Takebe transplanted them to their host's abdominal cavity, having first caused the animal's real liver to fail, they often kept the mouse alive when an animal without the transplant would have died.

  然后武部博士又将这些肝芽结构移植到了相应老鼠的腹腔中,起初肝芽结构会破坏老鼠体内自身的肝脏,但是接着很多老鼠并没有死亡。

  Translating this work into a way of growing new livers for people whose old ones have stopped working will take time.

  诚然,要将这个过程在人类身上临床试验仍需时日。

  But it is a big step forward.

  但在老鼠体内的实验已是继往开来的重要一步。

  After years of promise, regenerative medicine may be coming close to delivering.

  在人们年复一年的期盼中,再生医疗终会有实现梦想的那一天。

本文关键字: GRE阅读材料 GRE阅读 GRE

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