Just how the blocking mechanism will be applied and who will check whether the process is working is far from clear.

BBC: Newzbin: What happens next?

They were then able to give the mice higher doses of radiation therapy with no ill effect by blocking a mechanism by which endothelial cells communicate with each other.

BBC: Minimising cancer care damage

Another approach aims to restorethe effectiveness of existing drugs by blocking bacteria's ability to pump antibiotics out, one mechanism of resistance.

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Adams theorized that blocking the proteasome with a drug might overload tumor cells with proteins, causing the signaling mechanism to short-circuit.

FORBES: The Tireless Hunter