Alzheimer鈥檚 lost memories 鈥榬ecoverable鈥
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SUFFERERS of Alzheimer’s disease may not have “lost” their memories, but could simply have difficulty accessing them, researchers said as they unveiled a possible treatment that could one day offer a cure to the ravages of dementia.
Nobel Prize-winner Susumu Tonegawa said studies on mice showed that by stimulating specific areas of the brain with blue light, scientists could make the creatures recall thoughts that were otherwise unavailable to them. The results published yesterday offer some of the first evidence that Alzheimer’s disease does not destroy specific memories, but rather makes them inaccessible.
“As humans and mice tend to have a common principle in terms of memory, our findings suggest that Alzheimer’s disease patients, at least in their early stages, may also keep memories in their brains, which means there may be a possibility of a cure,” Tonegawa said.
Tonegawa’s team used mice that had been genetically modified to exhibit symptoms similar to those of humans suffering from Alzheimer’s disease — a degenerative brain condition that affects millions of adults around the world.
The animals were put in a box which had a low level electrical current passing through the floor — giving an unpleasant, but not dangerous, shock to their feet. An unaffected mouse that is returned to the same box 24 hours later freezes in fear, but those with Alzheimer’s do not.
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