Navigation Links
Mount Sinai researchers discover why cocaine is so addictive
Date:10/18/2010

Mount Sinai researchers have discovered how cocaine corrupts the brain and becomes addictive. These findingsthe first to connect activation of specific neurons to alterations in cocaine rewardwere published in Science on October 15. The results may help researchers in developing new ways of treating those addicted to the drug.

Led by Mary Kay Lobo, PhD, Postdoctoral Fellow in the Department of Neuroscience at Mount Sinai School of Medicine and first author of the study, researchers found that the two main neurons (D1 and D2) in the nucleus accumbens region of the brain, an important part of the brain's reward center, exert opposite effects on cocaine reward. Activation of D1 neurons increases cocaine reward whereas activation of D2 neurons decreases cocaine reward.

"The data suggest a model whereby chronic exposure to cocaine results in an imbalance in activity in the two nucleus accumbens neurons: increased activity in D1 neurons combined with decreased activity in D2 neurons," said Dr. Lobo. "This further suggests that BDNF-TrkB signaling in D2 neurons mediates this decreased activity in D2 neurons."

The study was conducted using optogenetics, a technology to optically control neuronal activity in freely moving rodents.

Opposite cocaine reward similar to those found when activating each neuron is achieved by disrupting brain-derived neurotrophic factor, which is a protein in the brain known for its involvement in neuronal survival, learning, and memory and drug abuse signaling through its receptor TrkB in D1 or D2 neurons.

"This new information provides fundamentally novel insight into how cocaine corrupts the brains reward center, and in particular how cocaine can differentially effect two neuronal subtypes that are heterogeneously intermixed in the nucleus accumbens," said Eric Nestler, MD, PhD, Chair of Neuroscience, Nash Family Professor, and Director of The Friedman Brain Institute at Mount Sinai and co-author on the study. "We can use this information to potentially develop new therapies for cocaine addiction, possibly aimed at altering neuronal activity selectively in either neuronal subtype."


'/>"/>

Contact: Mount Sinai Press Office
newsnow@mountsinai.org
212-241-9200
The Mount Sinai Hospital / Mount Sinai School of Medicine
Source:Eurekalert

Related medicine news :

1. Mount Sinai researchers find new target to improve pain management
2. Small Amounts of Dark Chocolate May Guard Against Heart Failure
3. Mount Sinai pioneers new cardiac imaging device
4. Mount Sinai leads Consortium of Food Allergy Research with $29.9 million grant
5. The Marilyn B. Gula Mountains of Hope Foundation donates additional research funds to TGen
6. Chicago Father and Son Team to Climb Mount Kilimanjaro for ShelterBox
7. AAU Big Mountain Jam Basketball Tournament To Be Played On SnapSports Flooring
8. Mount Sinai researchers find structural basis for incidence of skin cancers in a genetic disorder
9. Women who consume large amounts of tea have increased risk of rheumatoid arthritis
10. Albeo Releases Six New Surface Mount LED Lighting Fixtures
11. Green Drinks NYC and Green Mountain Energy Company Present Summer Bash at Solar One
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/12/2016)... , ... February 12, 2016 , ... According to an ... are beginning to account for a significant portion of hernia repairs throughout the United ... the Beverly Hills Hernia Center notes that this trend has not only been expected, ...
(Date:2/12/2016)... ... ... Enforcement Trends: , Back to the Future , Feb. 25, 2016 — 11:00 a.m. – ... who don’t learn from history are doomed to repeat it.” , An analysis of CDRH’s ... But that takes time. , Take a close look at the warning letters the ...
(Date:2/12/2016)... , ... February 12, 2016 , ... ... announced that nominations have closed for the ISE Southeast Awards 2016. Finalists and ... announced at the ISE® Southeast Executive Forum and Awards Gala on March 15, ...
(Date:2/12/2016)... , ... February 12, 2016 , ... AssureVest Insurance Group, ... is initiating a charity drive that will raise funds earmarked to purchase computers and ... Tayloe Elementary School. , “My school is in a low-income area and has more ...
(Date:2/12/2016)... ... 2016 , ... Donor Network West, the organ procurement organization that heals lives ... San Ramon Regional Medical Center. Under the collaboration, the first of its kind, specific ... a more certain time frame for donor families for the recovery of organs. ...
Breaking Medicine News(10 mins):
(Date:2/12/2016)... On Thursday, Feb. 11, 2016, surgeons at ... North Austin Medical Center successfully completed the first robotic ... Surgical System with Trumpf Medical,s advanced operating table, ... , M.D., colorectal surgeon at the Texas Institute for ... Motion technology, which seamlessly combines the da Vinci Xi ...
(Date:2/12/2016)... , 12 februari 2016 AAIPharma ... toonaangevende leverancier van productie en ontwikkeling op ... kondigt vandaag een uitbreiding aan van steriele ... locatie in Charleston, SC ... tot meerdere recente investeringen. http://photos.prnewswire.com/prnh/20150806/256637LOGO ...
(Date:2/11/2016)... , Feb. 11, 2016 The primary goal ... future adoption patterns on the usage of liquid biopsy. ... following: - Timeframe of liquid biopsy adoption ... cfDNA and Evs—by organization type - Sample inflow to ... blood, saliva, stool, serum, and so on. - Correlation ...
Breaking Medicine Technology: