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Connection discovered between the nervous system and the vascular system
Date:6/8/2011

Montral, June 8, 2011 Dr. Frdric Charron, researcher at the Institut de recherches cliniques de Montral (IRCM), and his team have shown for the first time that a key molecule of the vascular system directs axons during the formation of neural circuits. This connection between the nervous system and the vascular system could be a good starting point for the development of therapies for neurodegenerative diseases. The discovery will be published tomorrow by Neuron, a scientific journal of the Cell Press group.

"To properly form neural circuits, developing axons (long extensions of neurons that make the nerves) need molecules to guide them towards their target, in the same way that road signs guide us when we drive," explains Pierre Fabre, doctoral student in Dr. Charron's team and first co-author of the article.

The nervous system is not the only system formed during human embryo development. Blood vessels are also organized into a very complex network, which led to the idea that certain molecules could be reused by both the nervous system and the vascular system. In fact, recent studies revealed that the reference points used to guide axons also help blood vessels reach their targets.

"One of the key molecules of the vascular system is the vascular endothelial growth factor, better known as VEGF," adds Mr. Fabre. "We discovered that VEGF is able to attract nervous system axons. More specifically, we identified Flk-1 as the receptor responsible for this effect, making it a prime target for the development of therapies to re-grow axons after lesions of the central nervous system or neurodegenerative diseases."

This scientific breakthrough was possible due to an innovative technique developed by Dr. Charron's laboratory a few years ago. The system uses a microscopic device to control and observe, in real time, the axon's behaviour in response to guidance molecules. This technique allowed the researchers to follow the axo
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Contact: Julie Langelier
julie.langelier@ircm.qc.ca
514-987-5555
Institut de recherches cliniques de Montreal
Source:Eurekalert

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