FUGGEDABOUDIT: Researchers have shown, in a mouse model, that they can erase drug associated memories--freeing the animals from drug addiction.
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Using a chemical that blocks the creation of memories, scientists have prevented rats from using cocaine after they had become addicted to the drug. The hope is that doctors will one day be able to give humans some version of the chemical and stop cocaine addiction in its tracks.
Barry Everitt, an experimental psychologist at the University of Cambridge in England, focused his group's efforts on proteins called NMDA-type glutamate receptors in rat brains. Previous work on addiction and post-traumatic stress has shown that these proteins—which are found on the surface of brain cells—are essential to memory formation. The receptors are also crucial to reconsolidating a memory—moving it from its storage area in long-term memory to brain regions that handle short-term memory.
The researchers—who report their findings in the Journal of Neuroscience—put rats in a cage with a lever in it for a couple of hours per day for a week. When the animals pushed the lever, a light would come on and a cocaine solution would be dispensed to the rat. The rats began to associate the light they saw with cocaine.
After a couple weeks of forced sobriety, the animals were returned to the cage. Before going back in, some of the rats received injections of experimental drugs that block NMDA-type glutamate receptors in the amygdala—a brain region that has been implicated in drug-associated memories.
Both treated and untreated animals, when back in the cage, would press the lever over and over again. The light would come on, but no cocaine would be served. Untreated animals continued unfazed, hoping cocaine would eventually come out.
For the treated animals, however, Everitt says, "They press the lever, but it doesn't do anything, so they stop." The animals seemed to forget that the light in the cage meant cocaine was on its way for up to four weeks after only a single treatment.
Scientists say that suggests that by disrupting the recollection of a drug-associated memory—a person one abuses drugs with, a place that one uses drugs at, for example—a therapeutic may be able to break the connection between cues in the environment and the need for drugs. Sometimes these cues can be quite close to home—a family member or loved one.
Yavin Shaham, a neurobiologist at the National Institute on Drug Abuse in Bethesda, Md., said in a press statement that the new work is an example of "basic research that can be readily translated to the treatment of cocaine addiction in humans."
With no approved medications on the market to specifically treat cocaine addiction, most treatment regimens rely of behavioral therapy. Often, according to Everitt, these therapies involve exposing addicts to cues that they associate with drug use—but in the absence of the illicit substance. Once a recovered addict encounters these cues back in the real world though, they often relapse. Everitt suggests using an NMDA-type glutamate receptor blocker in the clinic could improve that treatment.
Karim Nader, a behavioral neuroscientist at McGill University in Montreal, called the new research "promising" for treating addiction, adding that he doesn't know of a one-time treatment that causes rodents to stop taking drugs for long periods of time.
Everitt notes that while the drugs used in the current study are experimental, there are several drugs approved by the U.S. Food and Drug Administration that target the same receptors: Dextramethorphan, which is found in many over-the-counter cough suppressants and memantine, a drug approved to slow the progression of Alzheimer's disease, are examples.
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13 Comments
Add CommentThis study is really a double edged sword. On the one hand it can be used to treat drug additction and possibly PTSD, on the other hand it can be miused by CIA and FBI during investigation as a torture tactics.
Reply | Report Abuse | Link to thisI am not buying this. How is it determined that a single memory can be targeted?
Reply | Report Abuse | Link to thisAs I understand it, the treatment works by suppressing the reappearance of memories associated with cocaine.
Reply | Report Abuse | Link to thisI hope It works properly..If no I can't spend more for this..But this is useful Information..
Reply | Report Abuse | Link to thisThanks...
Florida Drug Addiction
james...
A 12 step program recommends searching for real facts of life and attempt to finding and facing of facts without any terror. For >Treatment of addiction, Concentration in god prayer, analysis of own life style and work hard to neglect the bad behavior and activities.
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Use of cocaine leads to everlasting hurt, compulsion and even death of abuser. There are short term and long term effect of using cocaine. It is very difficult to overcome from long term addiction. It can be possible with help of cocaine treatment center.
Reply | Report Abuse | Link to thishttp://www.addiction-treatments.com/
There is no doubt that past experiences can trigger drug use, but an effective <a href="http://www.drugsno.com">drug rehab</a> can definitely fix those issues.
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Reply | Report Abuse | Link to thiswww.DrugsNo.com
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Reply | Report Abuse | Link to thisAlcoholism and drug addiction are diseases that progress through stages. It should take a trained health professional or a doctor specializing in addiction medicine, to make an accurate diagnosis and prescribe the most appropriate treatment, whether it would be outpatient counseling or an inpatient treatment for substance abuse. <a href= http://www.edrugrehabs.com/>Drug rehab treatment centers</A> offer a type of treatment program for alcoholism or drug addiction that meets individual needs. Programs may include residential, inpatient, outpatient, and short-stay options.
Reply | Report Abuse | Link to thishttp://www.edrugrehabs.com/
Alcoholism and drug addiction are diseases that progress through stages. It should take a trained health professional or a doctor specializing in addiction medicine, to make an accurate diagnosis and prescribe the most appropriate treatment, whether it would be outpatient counseling or an inpatient treatment for substance abuse. <a href= http://www.edrugrehabs.com/>Drug rehab treatment centers</A> offer a type of treatment program for alcoholism or drug addiction that meets individual needs. Programs may include residential, inpatient, outpatient, and short-stay options.
Reply | Report Abuse | Link to thishttp://www.edrugrehabs.com/
This is great! I wish I could have just forgot about everything from the beginning of treatment. After relapsing many times I figured out how to quit the right way. Check out <a href="http://www.pressingtheissue.com/2011/02/addiction-relapse/">Addiction Relapse</a>
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