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NEW YORK (AP) — Scientists pursuing the biological roots of schizophrenia have zeroed in on a potential factor — a normal brain process that gets kicked into overdrive. The finding could someday lead to ways to treat the disease or even prevent it. Nobody knows what causes the disorder, so the new result offers a possible peek into a black box. The work is reported in a paper released Wednesday by the journal Nature. The result links schizophrenia risk to a problem with a trimming back of connections between brain cells. This pruning naturally occurs in adolescence and early adulthood. But the new work suggests that if the pruning goes too far, a person's risk of schizophrenia may go up. ___ Online: Journal Nature: http://www.nature.com/nature

Study hints at biology of schizophrenia, may aid treatment