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At the Society for Neuroscience conference in 2005, His Holiness the Dalai Lama responded to a question very similar to this.
He argued that animal research was permissible so long as it benefits humans and is done compassionately.
There are various accounts on the web:
http://neurodudes.com/2005/11/12/his-holinesss-message-better-living-through-chemicals-or-electrodes/
http://retrospectacle.blogspot.com/2005/11/dalai-lamas-speech-at-sfn-2005.html