Navigation Links
Protein synthesis blocker may hold key to reducing effects of traumatic events
Date:3/4/2013

This release is available in French.

Reducing fear and stress following a traumatic event could be as simple as providing a protein synthesis blocker to the brain, report a team of researchers from McLean Hospital, Harvard Medical School, McGill University, and Massachusetts General Hospital in a paper published in the March 4 issue of Proceedings of the National Academy of Sciences.

"This is an important basic neuroscience finding that has the potential to have clinical implications for the way individuals with posttraumatic stress disorder are treated," said Vadim Bolshakov, PhD, director of the Cellular Neurobiology Laboratory at McLean Hospital. "We used a well known behavioral paradigm that we think models PTSD, fear conditioning, to explore how fearful memories are formed. In our study, the level of fear exhibited by experimental subjects was significantly reduced as a result of decreased signal transfer between cells in the amygdala, a key brain region in fear-related behaviors."

Influenced by the original findings of Karim Nader, PhD, professor of Psychology at McGill University, whose pioneering work showed that old memories should be un-stored in their brain after their recollection in order to last, Bolshakov's team exposed rats to auditory stimulus that the animals learned to associate with a mildly traumatic event. After a single exposure to the training procedures, the rats exhibited fear during subsequent exposures to auditory stimuli. The researchers then provided the animals with rapamycin, a protein synthesis blocker, immediately after memory was retrieved in order to control bonding between the cells in the brain. The animals exhibited significantly less fear in response to the fear-invoking stimulus when retested the next day.

"The animals showed stereotypical signs of fear after the initial exposure to the auditory stimulus," explained Nader, a co-author on the paper. "Following the administration of rapamycin, we show a significant decrease in fear, but not a complete elimination. We were surprised to note that activity between cells was significantly affected by postsynaptic mechanisms."

The findings of this study, which was funded by a grant from the United States Department of Defense spearheaded by Roger Pitman, suggest that different plasticity rules within cells in the brain are recruited during the formation of the original fear memory and after fear memory was reactivated.

"Although further work at the molecular level needs to be completed, we are hopeful that this unexpected discovery is the foundation needed to identify ways in which we can better treat anxiety disorders in which fear condition plays a role, such as post traumatic stress disorder," said Bolshakov.


'/>"/>

Contact: Cynthia Lee
cynthia.lee@mcgill.ca
514-398-6754
McGill University
Source:Eurekalert

Related medicine news :

1. Discovery of executioner protein opens door to new options for stroke ALS, spinal cord injury
2. Researchers discover how to shutdown cancers powerful master protein
3. Protein balance key in preventing cancer
4. Resurrection of 3-billion-year-old antibiotic-resistance proteins
5. Researchers at the UH Cancer Center discover protein that may control the spread of cancer
6. Cell scaffolding protein fascin-1 is hijacked by cancer
7. BioTrust Low Carb Protein Review Revealed By BioTrust Nutrition Reviews
8. Data on novel IL-1 inhibitor protein for topical treatment of dry eye disease published
9. Low-protein diet slows Alzheimers in mice
10. Protein central to cancer stem cell formation provides new potential target
11. Novel protein may help detect Lou Gehrigs disease and dementia, Mayo Clinic finds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/23/2017)... (PRWEB) , ... May 23, 2017 , ... Therachat ... its new survey in an infographic on the current state of anxiety in support ... familiar with anxiety, was conducted in April 2017 and benchmarked general anxiety levels as ...
(Date:5/22/2017)... ... May 22, 2017 , ... Dr. Kiya Green, a ... periodontal plastic surgery treatments, including crown lengthening and gum reduction surgery, ... esthetic and functional procedures to help patients improve their oral health, reduce gummy ...
(Date:5/22/2017)... Galena, Alaska (PRWEB) , ... May 22, 2017 , ... ... town near the Arctic Circle made big headlines when it was targeted to build ... Low-Cost Energy in Bush Alaska,” former city manager Marvin L. Yoder describes the journey ...
(Date:5/21/2017)... ... , ... Chris Cornell, 52, was found dead on the night of Wednesday, May 17, 2017. ... singers in the rock industry would take his own life, but the extremely talented and ... illness played a role in the death of Chris Cornell . , Depression and ...
(Date:5/21/2017)... (PRWEB) , ... May 20, 2017 , ... Pot. Reefer. ... find it, review it, and share its attributes like never before. More than a ... to connect cannabis enthusiasts to stores, strains, products – and for the first time ...
Breaking Medicine News(10 mins):
(Date:5/6/2017)... , May 5, 2017  Hill-Rom Holdings, Inc. (NYSE: ... approximately 100,000 square feet to its Welch Allyn campus. ... its commitment to bring more than 100 new jobs ... Welch Allyn has maintained a significant presence for more ... these new positions, a large portion of which will ...
(Date:5/4/2017)... SAN DIEGO , May 4, 2017 /PRNewswire/ ... is demonstrating its wireless, handheld ultrasound scanners this ... Gynecologists Annual Scientific Meeting (ACOG) in ... 2017. "Clarius is the perfect ... fetal growth and heart rate, and evaluate pregnancy-related ...
(Date:5/4/2017)... 2017  A new tight-tolerance microextrusion medical tubing ... materials, is being launched by Natvar, a Tekni-Plex ... in recent years to service a wide variety ... More expensive materials such as glass and fluoropolymers ... to their ability to consistently hold tolerances. This ...
Breaking Medicine Technology: