HOME >> MEDICINE >> NEWS
UT Southwestern researchers find clue to understanding tolerance to drugs of abuse

DALLAS Sept. 23, 2002 Researchers at UT Southwestern Medical Center at Dallas and their colleagues have uncovered new information that will help brain researchers better understand a person's tolerance to drugs of abuse and open new avenues of investigation into the relationship of addictive-drug usage and the biological causes of mood disorders.

Dr. Michel Barrot, assistant professor of psychiatry at UT Southwestern and lead author of the paper, said researchers used genetically altered mice to show that pain both physiological and psychological as well as pleasure can activate changes in the nucleus accumbens, the forebrain structure critical for reward and motivation processes. The findings appeared in a recent issue of Proceedings of the National Academy of Sciences.

Senior author Dr. Eric Nestler, chairman of psychiatry at UT Southwestern, had previously established that drugs of abuse activate CREB, a specific binding protein known for playing a role in the plasticity and adaptation of nerves in the nucleus accumbens. This action between a drug and a binding site is involved with the learning processes and can affect the interaction between subject and environment.

Barrot worked with Nestler on the earlier research that laid the scientific basis for the study in Proceedings.

Researchers reported that they used viral-mediated gene transfer to deliver and overexpress CREB locally, thus mimicking the CREB hyperactivity seen after the delivery of drugs of abuse or exposure to stress. The mice were then tested for their sensitivity to rewards, such as morphine or sucrose, as well as for their sensitivity to anxiety-causing negative situations or painful stimuli.

"In the paper we show that inducing local CREB hyperactivity decreases the emotional response of an animal in different ways, including those that are rewarding, aversive, anxiety-provoking or hurtful," Barrot said. "On the other hand, a decrease in activ
'"/>

Contact: Ann Harrell
Ann.Harrell@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
23-Sep-2002


Page: 1 2

Related medicine news :

1. NASA awards $9.8 million NSCOR grant to UT Southwestern to study effects of space radiation exposure
2. UT Southwestern doctors track Oklahoma Alzheimers patients via telemedicine
3. Auditory screening for newborns can be successful, UT Southwestern researchers report
4. Exercise helps reduce symptoms of depression, UT Southwestern researchers find
5. UT Southwestern researchers find calcium intake contributing factor in formation of kidney stones
6. UT Southwestern Moncrief Cancer Center is first in Texas to treat patients with TomoTherapy
7. Donald W. Reynolds Foundation awards UT Southwestern $12 million to continue Dallas Heart Study
8. Patients with severe depression improve using guidelines developed by UT Southwestern researchers
9. UT Southwesterns Dr. Charles Pak receives international award for kidney-stone research
10. Excess body weight linked to formation of uric acid kidney stones, UT Southwestern researchers find
11. UT Southwestern researchers discover first effective treatment for exercise disorder

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/19/2017)... Yorba Linda, Ca (PRWEB) , ... January 19, ... ... interactive virtual events for tech innovators, engineers, and scientists from around the world, ... the site offers users a quick and easy portal to research breakthroughs and ...
(Date:1/19/2017)... (PRWEB) , ... January 19, 2017 , ... ... dynamic telemedicine solutions, has recently unveiled impressive transportable capabilities with their iMedHD2™ Portable ... product is an extension to RMT technology that delivers HD, dynamic, streaming ultrasound ...
(Date:1/19/2017)... ... January 19, 2017 , ... ... medical capacity this year. Drs. Alexander Paziotopoulos, Andrew Petersen and Trish Henrie-Barrus will ... version of the clinic’s leading recovery program. , “We know it’s easy ...
(Date:1/19/2017)... Scotch Plains, NJ (PRWEB) , ... January 19, ... ... a board certified dermatologist by the American Board of Dermatology and fellowship trained ... Institute of the National Institutes of Health, Dr. Li completed his internship in ...
(Date:1/19/2017)... ... 19, 2017 , ... Bio-Optronics Inc. is proud to announce ... designed to seamlessly integrate and streamline the way researchers prepare and conduct patient ... usability and improving efficiency significantly for users – a first in the CTMS ...
Breaking Medicine News(10 mins):
(Date:1/19/2017)... Calif. , Jan. 19, 2017  Abaxis, Inc. ... manufacturing point-of-care blood analysis instruments and consumables for the ... call to discuss its financial results for the third ... call will be at 4:15 p.m. ET on Thursday, ... for the third quarter fiscal year 2017 after the ...
(Date:1/19/2017)... Shire plc (LSE: SHP, NASDAQ: ... and Drug Administration (FDA) has acknowledged receipt of the ... for SHP465, a long-acting, triple-bead, mixed amphetamine salts formulation. ... for Attention-Deficit/Hyperactivity Disorder (ADHD). The FDA is expected to ... the designated Prescription Drug User Fee Act (PDUFA) action ...
(Date:1/19/2017)... Florida , January 19, 2017 ... Trump administration appears serious about reducing the FDA,s ... and innovation in the medical drug industry, many ... ahead with new clinical trials and development of ... companies forging ahead with recent developments include:  Moleculin ...
Breaking Medicine Technology:
Cached News: