Drinking alcohol over long period affects brainBy IANS
Thursday, May 6, 2010
LONDON - Drinking alcohol over a long period profoundly affects the brain, which adapts to the intoxicant and causes withdrawal symptoms when consumption stops.
Neuroscientists from the University of Southampton’s School of Biological Sciences (USSBS) investigated alcohol dependency and withdrawal using tiny one mm long C. elegans worms.
Despite the worm’s evolutionary distance from humans, and very simple brain of just 302 nerve cells, it exhibits similar alcohol-dependent behaviours.
The research showed that withdrawal symptoms could be relieved by small doses of alcohol. However, easing the effects can increase dependency.
In humans, the symptoms are manifested in anxiety, agitation and, in extreme cases, seizures. The worms, as video footage shows, also became overactive in alcohol withdrawal and showed spontaneous and deep body bends — a behaviour rarely seen in ‘teetotal’ worms.
Lindy Holden-Dye, professor and neuroscientist at the USSBS, who led the study said: “This research showed the worms displaying effects of the withdrawal of alcohol and enables us to define how alcohol affects signalling in nerve circuits which leads to changes in behaviour.”
Holden-Dye adds: “Neuropeptides (particular class of brain signalling molecule) are also involved in chronic alcohol effects in humans and this is leading to new ideas for the treatment of alcoholism, but their precise role is unclear.”
“Our study provides a very effective experimental system to tackle this problem,” she says, according to an USSBS release.
The study was published in PLoS ONE.