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New strategy for stimulating neurogenesis may lead to drugs to improve cognition and mood
Date:4/3/2011

other strategies, may also be useful in treating some of the learning deficits seen in people with normal or pathological aging, such as Alzheimer's disease. In fact, there is already evidence that pattern separation declines during normal aging.

"This paper, as a consequence, may stimulate a whole area of research in humans to try to determine who in the population may have a pattern separation deficit, and whether it is restricted to the emotional domain, or is present even while performing tasks devoid of emotional salience. Once these studies are done in humans, it may be possible to treat these people with specifically targeted drugs or more personalized therapies," said Dr. Hen.

The researchers say that the genetic strategy used to stimulate neurogenesis in their experiments can be mimicked pharmacologically, potentially leading to the development of new drugs to reverse pattern separation deficits. One such class of drugs the investigators are currently testing BAX inhibitors works by blocking cell death.

"These drugs are basically doing the same thing that we did with our genetic manipulationnamely, increasing the survival of the young neurons which normally undergo a process of cell death that eliminates at least half of these neurons. Now instead of dying, the neurons will go on to survive," said Dr. Sahay.

Some BAX inhibitors have been developed for stroke research, where the goal has also been to prevent neurons from dying. The Columbia researchers plan to begin testing the BAX inhibitors in mice shortly. And if they produce cognitive benefits, the testing will be extended to clinical trials to determine if there's also a beneficial effect in humans.

"I think we're getting closer to harnessing neurogenesis to improve cognition and mood in humans. This research may also help explain a bit of a mystery in the field, which we still don't understand, regarding how the hippocampus can be involved with both cogni
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Contact: Karin Eskenazi
ket2116@columbia.edu
212-342-0508
Columbia University Medical Center
Source:Eurekalert

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