MADRID, SPAIN - Spanish scientists have for the first time used gene therapy to reverse memory loss in mice with Alzheimer's, an advance that could lead to new drugs to treat the disease, they said Wednesday.

The Autonomous University of Barcelona team injected a gene which causes the production of a protein that is blocked in patients with Alzheimer's into the hippocampus -- a region of the brian essential to memory processing -- in mice that were in the initial stages of the disease.

"The protein that was reinstated by the gene therapy triggers the signals needed to activate the genes involved in long-term memory consolidation," the university said in a statement.

Gene therapy involves transplanting genes into a patient's cells to correct an otherwise incurable disease caused by a failure of one or another gene.

The finding was published in The Journal of Neuroscience and it follows four years of research.

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Scientists reverse memory loss in Alzheimer's-afflicted mice

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