Research Highlights

Research News
Thursday, May 17, 2012

Screening and brief interventions performed by ER staff can reduce alcohol consumption and impaired driving

Author: 
John Bowersox

Research shows that primary health care providers can promote significant, lasting reductions in drinking levels and alcohol-related problems by asking patients about alcohol use and briefly advising them to reduce risky drinking.  In a new study, researchers supported by NIAAA showed that doctors and nurses in an emergency department can also do effective brief interventions for patients who report risky alcohol use.  Researchers asked patients who came to the emergency department of a large university hospital about their alcohol use.  The nearly 900 adult patients included in the study were found to exceed NIAAA guidelines for low-risk drinking: no more than four drinks in a day and no more than 14 drinks per week for men, and three or fewer drinks per day and no more than seven drinks per week for women.  Individuals who received a seven-minute counseling session from a trained emergency practitioner subsequently had significantly lower rates of alcohol consumption and driving after drinking than those who did not, an effect that persisted even a year after the counseling session.

 

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Date: 
May 17, 2012
Research News
Friday, April 30, 2010

NPY Suppresses Stress-Induced Alcohol Relapse in Rats

Author: 
John Bowersox

Neuropeptide Y (NPY) is a naturally-occurring brain molecule that helps regulate emotional behavior, stress responses, and other functions. Much research evidence suggests that NPY also plays an important role in regulating alcohol consumption. Scientists led by NIAAA Clinical Director Markus Heilig, M.D., Ph.D., recently investigated the effect of NPY on stress-induced relapse to alcohol use. Relapse prevention is an important aspect of alcoholism treatment, and researchers who study this phenomenon often rely on animal models of relapse-like behavior. Such models usually involve training laboratory rats to obtain alcohol by pressing a lever. Later, the lever-pressing behavior is "extinguished," or unlearned, by removing the alcohol reward. Researchers then simulate alcohol relapse by exposing the animals to stress, which causes them to again seek alcohol by lever-pressing. Stress in rats is reliably induced by injections of yohimbine, a drug that causes anxiety and panic. Using this approach, Dr. Heilig and colleagues from the NIAAA Laboratory of Clinical and Translational Studies found that by injecting rats with NPY, they could suppress the relapse-like alcohol-seeking behavior brought on by yohimbine. The findings, they note, support further study of NPY as a potential treatment for alcoholism.

Date: 
April 30, 2010
Research News
Friday, April 30, 2010

Study Points to NK1R Blocker as Possible Alcoholism Treatment

Author: 
John Bowersox

Neurokinin-1 receptors (NK1R) are highly expressed in brain areas involved in stress responses and drug reward. In recent years, mounting research evidence has suggested that they may help regulate important aspects of alcohol use. In a new study, researchers at the NIAAA report that a compound that blocks NK1R suppresses alcohol drinking in mice. NIAAA Clinical Director Markus Heilig, M.D., Ph.D., and colleagues from the NIAAA Laboratory of Clinical and Translational Studies also showed that mice that lack the gene for NK1R have a lower preference for alcohol than do normal mice, and score lower on measures of alcohol reward, a key aspect of its addictive effects. Taken together, the data from the new study supports further investigation of NK1R blockade as a potential treatment for alcoholism.

Date: 
April 30, 2010
Research News
Friday, April 30, 2010

Young Drinkers Risk Slowing Down Brain Power

Author: 
Shuly Babitz

Drinking may harm adolescents' ability to concentrate and to understand spatial relationships. A recent study led by Susan Tapert at the University of California, San Diego compared the standardized test scores of 76 12 to 14 year old kids with their scores after about three years. At the three-year follow-up, 36 of the kids had begun drinking at moderate to heavy levels and 40 continued not using alcohol or other drugs. The study defined moderate to heavy drinking as drinking at least monthly and having three or more drinks at a time, or drinking less frequently, but having four or more drinks at a time. The kids in this study were consuming an average of about eight drinks per month by the time they reached the follow-up.

During the study's three-year time period, the team discovered once teens began to drink, they performed more poorly on cognitive tests than before they began drinking. Interestingly, the kinds of skills affected varied between girls and boys.

The researchers found that girls' scores on tasks requiring them to visualize and reproduce a complicated line drawing decreased after they began drinking. The researchers also found that boys' scores on tests requiring sustained attention decreased after they began drinking.

Tapert's study suggests that these behavioral effects may point toward alcohol's underlying effect on brain structure. Brain scans demonstrate that adolescent drinking can reduce the health of white matter in the brain. White matter is where brain cells communicate with each other, so damage to this area can result in slower, less efficient thinking. Reduced white matter integrity may cause girls to have difficulty understanding spatial relationships. This damage may be long-lasting since the adolescent brain is still undergoing significant developmental changes, making it especially vulnerable to alcohol's toxic effects.

Also see: Altered white matter integrity in adolescent binge drinkers, McQueeny T, Schweinsburg BC, Schweinsburg AD, Jacobus J, Bava S, Frank LR, & Tapert SF, Alcoholism: Clinical and Experimental Research, 2009, 33, 1278-1285.

Date: 
April 30, 2010
Research News
Friday, April 30, 2010

Behavioral and Drug Therapy Together Help Treat Alcoholism

Author: 
Jo-Ann Kriebel

A new analysis has shown that combined behavioral intervention (CBI), counseling that integrates cognitive-behavioral therapy, motivational enhancement, and techniques to enhance mutual help group participation, used alone in conjunction with naltrexone, a drug approved to help treat alcoholism, can reduce drinking in alcohol-dependent individuals. In this reanalysis of data from the COMBINE Study—the largest pharmacotherapy trial for alcoholism in the United States—researchers identified clinically useful trajectories of drinking (abstainers, infrequent drinkers, frequent to infrequent drinkers, increasing to frequent drinkers, increasing-to-nearly daily drinkers, and nearly daily drinkers). In addition, researchers determined that naltrexone reduced the chance that participants would follow a nearly daily drinking trajectory, and that CBI reduced participants' chance of following an increasing to nearly daily trajectory. Combining naltrexone and CBI, however, increased the chance of membership in a trajectory with a declining frequency of any drinking over time.

Because original COMBINE analysis showed no treatment advantage for naltrexone plus CBI, the researchers believe that trajectory analysis of COMBINE data provide a more complete representation of drinking during treatment and the effects of treatments on different aspects of drinking. These results reveal that certain subgroups of individuals may benefit more from specific treatments than is apparent from summary measures of COMBINE data.

Date: 
April 30, 2010

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