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Oxygen Sensing and Signaling in Alzheimer’s Disease: A Breathtaking Story!

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Abstract

Oxygen sensing and homeostasis is indispensable for the maintenance of brain structural and functional integrity. Under low-oxygen tension, the non-diseased brain has the ability to cope with hypoxia by triggering a homeostatic response governed by the highly conserved hypoxia-inducible family (HIF) of transcription factors. With the advent of advanced neuroimaging tools, it is now recognized that cerebral hypoperfusion, and consequently hypoxia, is a consistent feature along the Alzheimer's disease (AD) continuum. Of note, the reduction in cerebral blood flow and tissue oxygenation detected during the prodromal phases of AD, drastically aggravates as disease progresses. Within this scenario a fundamental question arises: How HIF-driven homeostatic brain response to hypoxia “behaves” during the AD continuum? In this sense, the present review is aimed to critically discuss and summarize the current knowledge regarding the involvement of hypoxia and HIF signaling in the onset and progression of AD pathology. Importantly, the promises and challenges of non-pharmacological and pharmacological strategies aimed to target hypoxia will be discussed as a new “hope” to prevent and/or postpone the neurodegenerative events that occur in the AD brain.

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Funding

This work was financed by the European Regional Development Fund (ERDF), through the Centro 2020 Regional Operational Programme (Projects Healthy Aging 2020) by COMPETE 2020—Operational Programme for Competitiveness and Internationalisation and Portuguese national funds via FCT – Fundação para a Ciência e a Tecnologia, under projects UIDB/04539/2020, PEst-OE/SAU/UI0215/2019 and UID/QUI/00062/2019 and by Post-Doctoral Researcher Contract DL57/2016 #SFRH/BPD/109822/2015 to SCC.

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SCC performed the literature search and analysis, wrote the manuscript, and designed the figures. The final draft was critically revised by PIM.

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Correspondence to Sónia C. Correia.

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The authors declare no conflict of interest.

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Correia, S.C., Moreira, P.I. Oxygen Sensing and Signaling in Alzheimer’s Disease: A Breathtaking Story!. Cell Mol Neurobiol 42, 3–21 (2022). https://doi.org/10.1007/s10571-021-01148-6

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  • DOI: https://doi.org/10.1007/s10571-021-01148-6

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