The SUNY Downstate researchers reported in the August 25 issue of 
Source: SUNY Downstate Medical Center 
Date: September 3, 2006 
 

Scientists Discover Memory Molecule
Scientists at SUNY Downstate Medical Center have discovered a 
molecular mechanism that maintains memories in the brain. In an 
article in Science magazine, they demonstrate that by inhibiting the 
molecule they can erase long-term memories, much as you might erase a 
computer disc.
Furthermore, erasing the memory from the brain does not prevent the 
ability to re-learn the memory, much as a cleaned computer disc may 
be re-used. This finding may some day have applications in treating 
chronic pain, post-traumatic stress disorder, and memory loss, among 
other conditions. 

The SUNY Downstate researchers reported in the August 25 issue of  
Science that an enzyme molecule called "protein kinase M zeta" 
preserves long-term memories through persistent strengthening of 
synaptic connections between neurons. This is analogous to the 
mechanism storing information as 0's and 1's in a computer's hard 
disc. By inhibiting the enzyme, scientists were able to erase a 
memory that had been stored for one day, or even one month. This 
function in memory storage is specific to protein kinase M zeta, 
because inhibiting related molecules did not disrupt memory.

These findings may be useful for the treatment of disorders 
characterized by the pathological over-strengthening of synaptic 
connections, such as neuropathic pain, phantom limb syndrome, 
dystonia, and post-traumatic stress. Conversely, the identification 
of the core molecular mechanism for memory storage may focus effort 
on the development of specific therapeutic agents that enhance memory 
persistence and prevent memory loss. Earlier this year, SUNY 
Downstate scientists reported that PKMzeta was bound up in the 
tangles of Alzheimer's disease, thus perhaps blocking its function in 
memory storage.

Link:  http://www.sciencedaily.com/releases/2006/08/060830204206.htm







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