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Therapy inducing self-repair of nerves to help Alzheimer’

A team of scientists has found a way to induce nerve cells in the brain and spinal cord to release natural antioxidants to protect the cells from the damage // caused by stress and free radicals.

The new therapeutic approach is based on a compound found in the body. The findings might give new hope to victims of stroke and degenerative brain diseases such as Alzheimer’s.

This approach works by inducing nerve cells in the brain and the spine to release natural antioxidants that protect nerve cells from stress and free radicals that lead to neurodegenerative diseases. Until this discovery, researchers were unable to induce release of these specific antioxidants directly in nerve cells, at the site where damage and degeneration occurs.

Current Alzheimer’s drugs have limitations to their effectiveness because of side effects. This new finding has generated a lot of excitement as it specifically targets the nerve cells avoiding other cell types. 'More important, these drugs may be much less toxic than prior drugs in this class,' Professor Stuart Lipton, study author and director of the Center for Neurosciences and Aging at the Burnham Institute said.

The study represents the first reported evidence that this protective response can be activated directly in nerve cells to release antioxidants and counter oxidative stress, boding well for future research.

The paper detailing the findings of this study is entitled 'Activation of the Keap1/Nrf2 Pathway for Neuroprotection by Electrophilic Phase II Inducers,' is published in the January 17th issue of the Proceedings of the National Academy of Sciences.

The US-Japanese research team, consisting of scientists from the Burnham Institute of Medical Research in La Jolla, California, and four Japanese universities, Iwate, Osaka City, Iwate Medical and Gifu Universities, experimented on the nerve cells in the brains of mice.

In stroke and various neurodegenerat ive disorders such as Alzheimer's disease and Lou Gehrig's disease, glutamate, an amino acid found in high quantities in the brain, is thought to accumulate. Glutamate, which acts as a neurotransmitter that nerves use to communicate at normal concentrations, becomes toxic at excessive levels, resulting in over stimulation of nerve cells, known as excitotoxicity, and causing excessive stress on the nerve cells eventually ending in cell death.

However, Lipton was quick to point out that the study had only been done in mice, and that a breakthrough was a long way off.

Currently, 24.3 million people are currently estimated to have dementia worldwide, with 4.6 million new cases being diagnosed each year as the population ages. By 2040 the number is predicted to have risen to 81.1 million.

The report said most people living with dementia are in the developing world, with five million in China alone. This compares with 4.8 million in Western Europe and 3.4 million in North America.

A report for Alzheimer's Disease International, published in The Lancet, said that the number of cases of dementia world-wide is likely to double every 20 years.


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