PMID- 35289012 OWN - NLM STAT- MEDLINE DCOM- 20221101 LR - 20221103 IS - 1750-3639 (Electronic) IS - 1015-6305 (Print) IS - 1015-6305 (Linking) VI - 32 IP - 6 DP - 2022 Nov TI - Pathological changes within the cerebral vasculature in Alzheimer's disease: New perspectives. PG - e13061 LID - 10.1111/bpa.13061 [doi] LID - e13061 AB - Cerebrovascular disease underpins vascular dementia (VaD), but structural and functional changes to the cerebral vasculature contribute to disease pathology and cognitive decline in Alzheimer's disease (AD). In this review, we discuss the contribution of cerebral amyloid angiopathy and non-amyloid small vessel disease in AD, and the accompanying changes to the density, maintenance and remodelling of vessels (including alterations to the composition and function of the cerebrovascular basement membrane). We consider how abnormalities of the constituent cells of the neurovascular unit - particularly of endothelial cells and pericytes - and impairment of the blood-brain barrier (BBB) impact on the pathogenesis of AD. We also discuss how changes to the cerebral vasculature are likely to impair Abeta clearance - both intra-periarteriolar drainage (IPAD) and transport of Abeta peptides across the BBB, and how impaired neurovascular coupling and reduced blood flow in relation to metabolic demand increase amyloidogenic processing of APP and the production of Abeta. We review the vasoactive properties of Abeta peptides themselves, and the probable bi-directional relationship between vascular dysfunction and Abeta accumulation in AD. Lastly, we discuss recent methodological advances in transcriptomics and imaging that have provided novel insights into vascular changes in AD, and recent advances in assessment of the retina that allow in vivo detection of vascular changes in the early stages of AD. CI - (c) 2022 The Authors. Brain Pathology published by John Wiley & Sons Ltd on behalf of International Society of Neuropathology. FAU - Fisher, Robert A AU - Fisher RA AUID- ORCID: 0000-0002-0387-290X AD - Dementia Research Group, University of Bristol Medical School, Bristol, UK. FAU - Miners, J Scott AU - Miners JS AUID- ORCID: 0000-0001-8594-1640 AD - Dementia Research Group, University of Bristol Medical School, Bristol, UK. FAU - Love, Seth AU - Love S AUID- ORCID: 0000-0001-8683-3625 AD - Dementia Research Group, University of Bristol Medical School, Bristol, UK. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20220314 PL - Switzerland TA - Brain Pathol JT - Brain pathology (Zurich, Switzerland) JID - 9216781 RN - 0 (Amyloid beta-Peptides) SB - IM MH - Humans MH - *Alzheimer Disease/pathology MH - Amyloid beta-Peptides/metabolism MH - Endothelial Cells/pathology MH - *Cerebral Amyloid Angiopathy/pathology MH - Blood-Brain Barrier/pathology MH - Brain/pathology PMC - PMC9616094 OTO - NOTNLM OT - Alzheimer's disease OT - blood-brain barrier OT - cerebral blood flow OT - neurovascular coupling OT - pericyte OT - vasculature COIS- We have no conflicts of interest to declare. EDAT- 2022/03/16 06:00 MHDA- 2022/11/02 06:00 PMCR- 2022/03/14 CRDT- 2022/03/15 05:47 PHST- 2022/02/11 00:00 [revised] PHST- 2021/12/10 00:00 [received] PHST- 2022/02/21 00:00 [accepted] PHST- 2022/03/16 06:00 [pubmed] PHST- 2022/11/02 06:00 [medline] PHST- 2022/03/15 05:47 [entrez] PHST- 2022/03/14 00:00 [pmc-release] AID - BPA13061 [pii] AID - 10.1111/bpa.13061 [doi] PST - ppublish SO - Brain Pathol. 2022 Nov;32(6):e13061. doi: 10.1111/bpa.13061. Epub 2022 Mar 14.