Profesionales médicos y otros de la salud

Nicotine sensitizes the mouse brain to the addictive effects of cocaine, according to recent NIDA-supported research. The results accord with the hypothesis that a person’s initial use of an addictive substance physiologically sensitizes his or her brain to the rewarding and addictive effects of other substances. If the findings carry over to people, then preventing youths from smoking might reduce their vulnerability to cocaine abuse and addiction, and cocaine-dependent individuals might ease their path to recovery by quitting smoking.

Clinical trials of N-acetylcysteine to help people recovering from drug abuse avoid relapse have demonstrated only moderate efficacy. New NIDA-supported research shows that while a low dose of the medication activates receptors associated with lowered drug-seeking behavior, a higher dose appears to activate receptors associated with increased drug-seeking behavior. The result suggests that a medication or combination of medications that stimulate the receptor GluR2/3 and block mGluR5 may work better than N-acetylcysteine alone.

Methadone treatment centers are not foci for serious criminal activity, according to a study that used crime reports and global positioning data to compare crime rates at various distances around methadone centers, hospitals, convenience stores, and residential neighborhoods.

NIDA researcher Dr. Charles O’Brien recently received the James B. Isaacson Award for a lifetime of research on the biological basis of alcoholism.

NIDA Program Officer Dr. David Thomas speaks about the intertwined problems of pain and prescription opioid abuse, as well as the research supported by NIDA and the National Institutes of Health to address these problems.

New vaccines that aim to promote recovery from cocaine and heroin abuse showed promise in animal testing. Both vaccines induced rats’ immune system to produce high titers of antibodies that inhibit the target drug from reaching the brain. The rats’ behaviors when given access to the target drug indicated that the vaccines reduced the reinforcing effects that, in recovering people, can cause lapses to turn into relapses.