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[[学习策略]] 人体器官工厂指日可待

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发表于 2005-9-26 12:33:53 | 显示全部楼层 |阅读模式
人体器官工厂指日可待


  东京:日本科研人员用动物自身的胚胎细胞,在实验室里培养出了青蛙的眼睛
和耳朵。东京大学的生物学家朝岛诚(Makoto Asashima)先生说,这项技术将最
终帮助医生利用人体细胞为失去感觉器官或感觉器官受损的病人培养出替代物。

  根据朝岛诚所言,研究人员在一种视网膜酸溶液中培养数千个胚胎细胞长达5天,
以期能长出器官。改变酸溶液的浓度就可以给细胞不同的基因指令,较低的浓度可
以激活长眼睛的基因,而浓度高一点则可导致耳朵的生长。

  TOKYO-Japanese researchers have grown frog eyes and ears 
in a lab, using the animal's own embryo cells.  Biologist 
Makoto Asashima of Tokyo University says the technology could 
eventually help doctors to use human cells to generate 
replacements for lost or damaged sensory organs in humans.   
According to Asashima, researchers cultivated thousands of 
embryo cells in a retinoic acid solution for five days to 
produce the organs.  Varying the concentration of the acid 
somehow gives different genetic instructions to the cells.  A 
lower concentration activates a set of genes producing eyes, 
while a higher concentration leads to the production of ears.
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