New compounds could reduce alcoholics’ impulse drink
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New compounds could reduce alcoholics’ impulse to drink

6:27 AM, 8th September 2015
New compounds could reduce alcoholics’ impulse to drink

BOSTON, US: Alcoholism inflicts a heavy physical, emotional and financial toll on individuals and society. Now new discoveries and promising animal studies are offering a glimmer of hope that a new class of drugs could treat the disease without many of the unwanted side effects caused by current therapies.

Researchers presented the results of their work at the 250th National Meeting & Exposition of the American Chemical Society (ACS).

“Alcoholism is a major problem in the US. Alcohol abuse costs almost $220 billion to the US economy every year. That’s a shocking number. We need a better treatment right now,” said V V N Phani Babu Tiruveedhula, a graduate student at the University of Wisconsin, Milwaukee.

The exact causes of alcoholism are not well understood, but the researchers explain that the urge to drink is related to the brain’s pleasure centres. Scientists have found that alcohol triggers the brain to release dopamine, the same neurochemical whose levels increase in response to pleasurable behaviour like eating, sex or listening to music.

Some drugs currently available to treat alcoholism are aimed at dopamine. “They dampen out the dopamine system a little bit, so you don’t get so happy when you have an alcoholic beverage,” said James Cook, PhD, a chemist at the University of Wisconsin, Milwaukee, who advises Tiruveedhula. But these medications, derived from a class of compounds called opioid antagonists, cause depression in some patients, Cook noted. And they’re addictive themselves, which can lead to drug abuse. Valium is an example of another common drug used to treat alcoholism that is also addictive.

Looking for an alternative, Cook focused on molecules known to cause some of the same results as Valium and the opioid antagonists without the unwanted side effects. For almost two decades, Cook collaborated with the late Harry June, PhD, a psychopharmacologist at Howard University.

Now, Tiruveedhula has made several of these promising beta-carboline compounds that could represent the future of alcoholism treatment. Tiruveedhula simplified their manufacture from eight steps to just two, while increasing the yield tenfold and eliminating unwanted byproducts. Cook said these potential medications could be taken orally.

In tests using rats bred to crave alcohol, the scientists found that administering these compounds drastically diminished the rats’ drinking. What’s more, they observed very few of the side effects common to alcoholism treatment drugs, such as depression and losing the ability to experience pleasure. As such, the beta-carbolines may also be less addictive.

“What excites me is the compounds are orally active and they don’t cause depression like some drugs do,” said Cook.

The group is continuing to test the compounds in additional animal studies. Cook has patented several of the most promising compounds and he is starting to explore possible partnerships with drug makers that could lead to medications.

© American Chemical Society News

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