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Home NEWS Science News Neuroscience

A new way to enhance nerve growth following injury

Bioengineer by Bioengineer
April 22, 2014
in Neuroscience
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New research published today out of the University of Calgary’s Hotchkiss Brain Institute (HBI) uncovers a mechanism to promote growth in damaged nerve cells as a means to restore connections after injury. Dr. Doug Zochodne and his team have discovered a key molecule that directly regulates nerve cell growth in the damaged nervous system. His study was published in the prestigious journal Nature Communications, with lead authors Drs. Kim Christie and Anand Krishnan.

A new way to enhance nerve growth following injury

Dr. Doug Zochodne is the senior researcher on the study

“We made the surprising discovery that a protein called Retinoblastoma (Rb) is present in adult neurons,” explains Zochodne. “This protein appears to normally act as a brake – preventing nerve growth. What we have shown is that by inactivating Rb, we can release the brake and coax nerves to grow much faster,” says Zochodne, a professor in the Department of Clinical Neurosciences.

Zochodne and his team decided to look for Rb in nerve cells because of its known role in regulating cell growth elsewhere in the body.

“We know that cancer is characterized by excessive cell growth and we also know that Rb is often functioning abnormally in cancer,” says Zochodne. “So if cancer is able to release this brake and increase cell growth, we thought we’d try to mimic this same action in nerve cells and encourage growth where we want it.”

The researchers were able to shut down Rb for a short amount of time and did not observe any negative results, leading them to feel optimistic that this could one day be used as a safe treatment for patients suffering from nerve damage.

So far, Zochodne is only investigating this technique in the peripheral nervous system. Peripheral nerves connect the brain and spinal cord to the body and without them, there is no movement or sensation. Peripheral nerve damage can be incredibly debilitating, with patients experiencing symptoms like pain, tingling, numbness or difficulty coordinating hands, feet, arms or legs.

For example, diabetic neuropathy is more common than multiple sclerosis, Parkinson’s disease and amyotrophic lateral sclerosis (ALS) combined. More than half of all diabetics have some form of nerve pain and currently there is no treatment to stop damage or reverse it.

Developing safe and effective therapies for conditions such as peripheral nerve disorders requires the ability to take investigations from cells in a petri dish to patients in a clinic. Zochodne and his team have been able to do that thanks in part to a preclinical facility that opened at the HBI in 2010. The Regeneration Unit in Neurobiology (RUN) was created through a partnership between the HBI, the University of Calgary and the Canada-Alberta Western Economic Partnership Agreement.

“The RUN facility has been critical for this research, says Zochodne. “It provides the resources and cutting-edge equipment that we need all in one facility. RUN has allowed us to take this idea from nerve cells, to animal models and eventually will help us investigate whether it could be a feasible treatment in humans. It’s an incredible asset”.

Story Source:

The above story is based on materials provided by University of Calgary, Marta Cyperling.

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