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Finding the way to memory
Date:2/4/2013

This release is available in French.

Our ability to learn and form new memories is fully dependent on the brain's ability to be plastic that is to change and adapt according to new experiences and environments. A new study from the Montreal Neurological Institute The Neuro, McGill University, reveals that DCC, the receptor for a crucial protein in the nervous system known as netrin, plays a key role in regulating the plasticity of nerve cell connections in the brain. The absence of DCC leads to the type of memory loss experienced by Dr. Brenda Milner's famous subject HM. Although HM's memory loss resulted from the removal of an entire brain structure, this study shows that just removing DCC causes the same type of memory deficit. The finding published in this week's issue of Cell Reports, extends Dr. Milner's seminal finding to another level, revealing a key part of the molecular basis for learning and memory.

Although both netrin and DCC are essential for normal development (in terms of guiding nerve cell growth) until now their function in the adult brain was not known. Dr. Tim Kennedy, lead researcher and neuroscientist at The Neuro, contributed to the discovery of netrins as a young post-doctoral fellow. This new study reveals the answer to the question that drove him to first start a lab. "I remember that exact moment when I knew I could run a research lab, it was 1993 and I was studying the developing nervous system and I was amazed to spot netrins in the adult brain - raising the important question, 'what are they doing there?' 20 years of dedicated research later the answer provides an important piece of the puzzle for understanding our nervous system and neurological disorders.

"The power of this study is that it looks at the animal on all levels, molecular, structural, and behavioural. We show that the netrin recep
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Contact: Anita Kar
anita.kar@mcgill.ca
514-398-3376
McGill University
Source:Eurekalert

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