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Ability to Erase Bad Memories Takes a Step Closer to Reality

by Kathy Jones on September 12, 2013 at 9:22 PM
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 Ability to Erase Bad Memories Takes a Step Closer to Reality

While erasing bad memories may currently belong to the realm of sci-fi movies, it has now taken a step closer to reality after researchers showed that they were able to erase dangerous drug-associated memories in mice and rats.

In the new study, the scientists inhibited actin polymerization - the creation of large chainlike molecules - by blocking a molecular motor called myosin II in the brains of mice and rats during the maintenance phase of methamphetamine-related memory formation.

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Behavioural tests showed the animals immediately and persistently lost memories associated with methamphetamine-with no other memories affected.

In the tests, animals were trained to associate the rewarding effects of methamphetamine with a rich context of visual, tactile and scent cues.
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When injected with the inhibitor many days later in their home environment, they later showed a complete lack of interest when they encountered drug-associated cues. At the same time, the response to other memories, such as food rewards, was unaffected.

The study has been published online in the journal Biological Psychiatry.

Source: ANI
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