Navigation Links
Animal research suggests new strategy for treating cocaine addiction
Date:4/6/2008

WINSTON-SALEM, N.C. New research in monkeys suggests the feasibility of treating cocaine addiction with a replacement drug that mimics the effects of cocaine but has less potential for abuse similar to the way nicotine and heroin addictions are treated.

Reporting at the annual meeting of the American Society of Pharmacology and Experimental Therapeutics in San Diego, Calif., scientists from Wake Forest University School of Medicine said treating monkeys with amphetamine significantly reduced their self-administration of cocaine for up to a month.

This suggests the possibility of developing an amphetamine-like drug for treating cocaine addiction, said Paul Czoty, Ph.D., lead author and assistant professor of physiology and pharmacology. The research also demonstrates the usefulness for conducting studies in monkeys to test potential treatments.

Czoty said the quest to develop a treatment for cocaine addiction has been ongoing for decades with little success. While we have medications for heroin and tobacco abuse, there is no FDA-approved treatment for cocaine, he said.

With both heroin and tobacco, there are treatments to replace the addictive drug with a drug that has similar effects on the body, but with less potential for abuse.

With this strategy in mind, clinical researchers have turned to drugs currently available, including amphetamines, said Czoty. While its unlikely that amphetamine itself will turn out to be the best treatment, these drugs allow us to prove the concept of using a replacement drug to combat cocaine addiction.

Amphetamines have been used in clinical studies with some success, said Czoty. His research in monkeys may help identify the best dose and schedule for administering a replacement drug as well as evaluate potential treatment candidates and estimate potential side effects.

For the study, a monkey was taught to press levers multiple times to obtain food or a cocaine injection. With each injection, the number of required lever presses increased so that the animal had to work harder for the cocaine.

This procedure measures the strength of the reinforcing effects of drugs, said Czoty. Each injection requires more and more work and eventually it gets to the point where its not worth it to the monkey because more than 1,000 presses are required.

Access to cocaine was then removed and the monkey was treated intravenously with an amphetamine 24 hours per day. When re-exposed to cocaine one week later, a dramatic decrease in responding for cocaine was observed. They tested three different doses of amphetamine and found that a moderate dose was most effective. Although the treatment also decreased lever-pressing for foodwhich could be predictive of side effects in humans -- this effect disappeared within one week while the effect on responding for cocaine injections persisted for up to one month.

This was a very positive finding exactly what we had hoped to see, said Czoty. Cocaine use was significantly reduced by about 60 percent.

The researchers are currently repeating the study in additional animals. They hope it could eventually lead to identifying a slightly different drug that will obtain the same results as amphetamines.

Czoty said the study is significant because it and other similar studies in monkeys duplicate what has been found in small studies in humans, which suggests that the animal model can be used to test other treatments. The researchers, for example, plan to test topiramate (Topamax), an anti-convulsant drug that is sometimes used to treat epilepsy and may be effective in treating alcoholism.

We have found a model we can use to test new drugs and have an idea of what positive or negative effects would look like, said Czoty.


'/>"/>

Contact: Karen Richardson
krchrdsn@wfubmc.edu
336-716-4453
Wake Forest University Baptist Medical Center
Source:Eurekalert

Related medicine news :

1. Animal Study Links Social Standing With Drug Use Risk
2. Humans have more distinctive hearing than animals, Hebrew U study shows
3. Gamma Secretase Modulators Show Promise in Alzheimers Disease Animal Model Efficacy Studies, According to Research Conducted by TorreyPines Therapeutics
4. Folate scores a win in animal studies: Brief, high doses of B vitamin blunt damage from heart attack
5. Human, animal vaccine development goal of hepatitis E virus research
6. Pain Management For Your Pets, Key Information Every Pet Owner Should Know - Live Webcast to Pet Owners, March 13, 8:00 p.m. to 9:00 p.m. (EDT) Via Morris Animal Foundation
7. Pain Management For Pets, Key Strategies For Veterinarians - Live Webcast to Veterinarians, March 13, 7:00 p.m. to 8:00 p.m. (EDT) Via Morris Animal Foundation
8. Researchers create first chikungunya animal model
9. Animal Planet Pet Video to Provide 2 Million Free Training DVDs to New Pet Parents of Adopted Shelter Dogs and Cats
10. U.S. Seeks to Limit Animal Testing of Toxic Chemicals
11. Chicago Tribune Does Story on Canine Cancer, Morris Animal Foundation (MAF) Effort to Find a Cure - MAF Can Provide Information - Local Angles for a Feature Story
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... ... Global Healthcare Management’s 4th Annual Kids Fun Run brought out many kids ... sponsored by Global Healthcare Management’s CEO, Jon Letko, is aimed at getting kids excited ... all ages; it is a non-competitive, non-timed event, which is all about having fun ...
(Date:10/13/2017)... ... 2017 , ... “America On The Brink”: the Christian history of the United ... the creation of published author, William Nowers. Captain Nowers and his wife, Millie, ... spent thirty years in the Navy. Following his career as a naval aviator ...
(Date:10/12/2017)... ... October 12, 2017 , ... IsoComforter, Inc. ( https://isocomforter.com ), one ... an innovative new design of the shoulder pad. The shoulder pad provides optimal ... controlling your pain while using cold therapy. By utilizing ice and water that is ...
(Date:10/12/2017)... ... 12, 2017 , ... HMP , a leader in healthcare events and ... Eddie Digital Award for ‘Best B-to-B Healthcare Website.’ Winners were announced during the Eddie ... annual award competition recognizes editorial and design excellence across a range of sectors. This ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... in property taxes a year. In some states—like New York, New Jersey, Massachusetts, ... contrast, many overseas retirement havens have extremely low property-tax rates, which contributes to ...
Breaking Medicine News(10 mins):
(Date:9/25/2017)... Sept. 25, 2017  EpiVax, Inc., a leader ... and immune-engineering today announced the launch of EpiVax ... of personalized therapeutic cancer vaccines. EpiVax has provided ... access to enabling technologies to the new precision ... lead EpiVax Oncology as Chief Executive Officer. Gad ...
(Date:9/19/2017)... , Sept. 19, 2017   ZirMed Inc ., a ... today announced that it has been ranked #1 by its ... Book™ Rankings 2017 User Survey. ZirMed was recognized as ... large hospitals and medical centers over 200 beds and holds ... healthcare technology user survey history. ...
(Date:9/12/2017)...  Consumer reviews on the independent review site Consumer Affairs ... company for hearing aids, ranking it higher than Miracle Ear ... ... For Hearing Aids ... online store that provides high performance, state-of-the-art, German-engineered hearing aids directly ...
Breaking Medicine Technology: