Other firms are looking beyond directly blocking VEGF, and are using RNA interference to target other molecules in its signalling pathway, either upstream or downstream.
其它公司不仅仅在考虑直接阻断VEGF，而是尝试通过RNA干扰来瞄准其信号路径中的其它分子，上行或者下行均可。
The Swiss team studied the pathway by using RNA interference to silence genes involved.
瑞士的研究组利用RNA干扰技术使相关基因沉默来研究这条通路。
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