1.   The drug blocks the action of the cancer gene.

2.   Other drugs block the reuptake of acetylcholine from a synapse and at the junction between neurones and muscles.

3.   And the study is the first to find that the drugs can block metastases to non-skeletal organs like the liver.

4.   Both drugs block an enzyme, reverse transcriptase, that the virus needs to reproduce.

5.   Both drugs can block estrogen, which often promotes breast cancer growth.

6.   Current drugs block one of two enzymes that are used by the virus, HIV, to replicate after it has infected the immune cells.

7.   Even if a drug blocks one or more MMPs used by a tumor type, the cancer cells may be able to roll out a backup enzyme.

8.   He suggested that the drugs were blocking the receptors on neurons that pick up the dopamine signal.

9.   It will be years, he says, before scientists know exactly how these genes lead to obesity and how drugs might block them.

10.   Or was it perhaps because the drugs did not block the right endorphins or that they acted in the wrong part of brain?