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英文原稿如下:
4 P3 A- J2 f' yA Science First: Stem Cells Injected into Woman's Brain# M0 l! i- y s* E, w a) Z
" E7 y: z7 A2 q9 r& }A brain cancer patient has become the first person to receive a direct brain injection of stem cells as part of a radical new treatment. That's 10 million neural stem cells, to be exact.
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Those millions of injected stem cells should ideally attach themselves to the patient's brain tumors. The patient will then take a non-toxic drug that ends up in her brain, where the drug interacts with a special enzyme contained in the neural stem cells. That mix creates a lethal chemotherapy cocktail for killing the tumors with precision -- at least in theory.* ~0 }6 O7 J1 k* L' x0 \5 g
+ ^$ w( e' c1 S" s$ \4 aAbout 23,000 Americans get diagnosed with brain cancer each year, and more than half that number die, according to CBS Evening News. This procedure has been successfully tested in mice, but now physicians must wait months to see whether the first human case pulls through. |
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