Nerve cell links severed in early stages of Alzheimer’s

In the early stages of Alzheimer’s disease, an overzealous set of proteins and cells begins to chew away at the brain’s nerve cell connections, a study in mice suggests. That finding, described March 31 in Science, adds to a growing body of research that implicates excessive synaptic pruning, a process that shapes the young brain by culling unused connections, with disorders later in life. The new work pins the loss of nerve cell–connecting synapses on particular immune system molecules and a notorious Alzheimer’s-linked protein. By uniting these multiple strands of…

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