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Aging. Aging-induced type I interferon response at the choroid plexus negatively affects brain function.

Research paper by Kuti K Baruch, Aleksandra A Deczkowska, Eyal E David, Joseph M JM Castellano, Omer O Miller, Alexander A Kertser, Tamara T Berkutzki, Zohar Z Barnett-Itzhaki, Dana D Bezalel, Tony T Wyss-Coray, Ido I Amit, Michal M Schwartz

Indexed on: 26 Aug '14Published on: 26 Aug '14Published in: Science



Abstract

Aging-associated cognitive decline is affected by factors produced inside and outside the brain. By using multiorgan genome-wide analysis of aged mice, we found that the choroid plexus, an interface between the brain and the circulation, shows a type I interferon (IFN-I)-dependent gene expression profile that was also found in aged human brains. In aged mice, this response was induced by brain-derived signals, present in the cerebrospinal fluid. Blocking IFN-I signaling within the aged brain partially restored cognitive function and hippocampal neurogenesis and reestablished IFN-II-dependent choroid plexus activity, which is lost in aging. Our data identify a chronic aging-induced IFN-I signature, often associated with antiviral response, at the brain's choroid plexus and demonstrate its negative influence on brain function, thereby suggesting a target for ameliorating cognitive decline in aging.