PD-1 immune checkpoint blockade reduces pathology and improves memory in mouse models of Alzheimer's disease - PubMed (original) (raw)

doi: 10.1038/nm.4022. Epub 2016 Jan 18.

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PD-1 immune checkpoint blockade reduces pathology and improves memory in mouse models of Alzheimer's disease

Kuti Baruch et al. Nat Med. 2016 Feb.

Abstract

Systemic immune suppression may curtail the ability to mount the protective, cell-mediated immune responses that are needed for brain repair. By using mouse models of Alzheimer's disease (AD), we show that immune checkpoint blockade directed against the programmed death-1 (PD-1) pathway evokes an interferon (IFN)-γ-dependent systemic immune response, which is followed by the recruitment of monocyte-derived macrophages to the brain. When induced in mice with established pathology, this immunological response leads to clearance of cerebral amyloid-β (Aβ) plaques and improved cognitive performance. Repeated treatment sessions were required to maintain a long-lasting beneficial effect on disease pathology. These findings suggest that immune checkpoints may be targeted therapeutically in AD.

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