Cited by 483Barrier Structure and Function StudiesDrug Transport and Resistance MechanismsCerebrospinal fluid and hydrocephalus

Physiological blood–brain transport is impaired with age by a shift in transcytosis

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Yang, Andrew C., Stevens, Marc Y., Chen, Michelle B., Lee, Davis P., Stähli, Daniel, Gate, David, Contrepois, Kévin, Chen, Winnie +20 more·2020·Nature

Abstract

The vascular interface of the brain, known as the blood-brain barrier (BBB), is understood to maintain brain function in part via its low transcellular permeability 1-3. Yet, recent studies have demonstrated that brain ageing is sensitive to circulatory proteins 4,5. Thus, it is unclear whether permeability to individually injected exogenous tracers-as is standard in BBB studies-fully represents blood-to-brain transport. Here we label hundreds of proteins constituting the mouse blood plasma proteome, and upon their systemic administration, study the BBB with its physiological ligand. We find that plasma proteins readily permeate the healthy brain parenchyma, with transport maintained by BBB-specific transcriptional programmes. Unlike IgG antibody, plasma protein uptake diminishes in the aged brain, driven by an age-related shift in transport from ligand-specific receptor-mediated to non-specific caveolar transcytosis. This age-related shift occurs alongside a specific loss of pericyte coverage. Pharmacological inhibition of the age-upregulated phosphatase ALPL, a predicted negative regulator of transport, enhances brain uptake of therapeutically relevant transferrin, transferrin receptor antibody and plasma. These findings reveal the extent of physiological protein transcytosis to the healthy brain, a mechanism of widespread BBB dysfunction with age and a strategy for enhanced drug delivery.

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  • BBB permeability becomes less selective with aging because of a loss of tight junctions and a shift from tightly regulated receptor-mediated transcytosis toward nonspecific transcytosis of plasma proteins.

    “BBB permeability becomes less selective with aging because of a loss of tight junctions and a shift from tightly regulated receptor-mediated transcytosis toward nonspecific transcytosis of plasma proteins (136, 137).”

    From Connecting aging biology and inflammation in the omics era (2022) · cites this paper as [137]

  • The entry of inflammatory cytokines and chemokines into the brain occurs through active transport or nonspecific caveolar transcytosis.

    “In parallel, the entry of inflammatory cytokines and chemokines occurs through active transport or nonspecific caveolar transcytosis (137, 142).”

    From Connecting aging biology and inflammation in the omics era (2022) · cites this paper as [137]

  • The number of samples for the single-cell sequencing studies was set using prior studies and preliminary experiments that confirmed sufficient BECs would be available for statistical analysis.

    “To determine the samples size for the single-cell sequencing studies, we used previous studies13,26 and performed preliminary studies to confirm that we will obtain enough BECs for statistical analysis (not included in the manuscript).”

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Authors
Yang, A. C., Stevens, M. Y., Chen, M. B., Lee, D. P., Stähli, D., Gate, D., Contrepois, K., Chen, W., Iram, T., Zhang, L., Vest, R. T., Chaney, A., Lehallier, B., Olsson, N., du Bois, H., Hsieh, R., Cropper, H. C., Berdnik, D., Li, L., Wang, E. Y., Traber, G. M., Bertozzi, C. R., Luo, J., Snyder, M. P., Elias, J. E., Quake, S. R., James, M. L., & Wyss-Coray, T.
Affiliations
  • Stanford Medicine (US)
  • Howard Hughes Medical Institute (US)
  • VA Palo Alto Health Care System (US)
Venue
Nature
Published
2020-07-01
Volume
583
Issue
7816
Pages
425-430
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W3039975419
Cited by
477
References
96
Citations by year
2026: 63 · 2025: 91 · 2024: 83 · 2023: 69 · 2022: 75 · 2021: 74 · 2020: 22
FWCI
23.81
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • U.S. Department of Veterans Affairs
  • American Heart Association (19PABHI34580007)
  • Glenn Foundation for Medical Research
  • NOMIS Stiftung
  • National Institutes of Health (1s10od025091-01, T32-AG0047126)
  • Wu Tsai Neurosciences Institute, Stanford University
  • National Institute on Aging (RF1AG059694, DP1AG053015, T32AG047126, P30AG066515)
  • National Human Genome Research Institute (P50HG007735)
  • National Cancer Institute (R01CA200423)
  • National Institute of General Medical Sciences (T32GM099608, GM059907, R01GM059907)
  • National Center for Research Resources (1S10OD01227601)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Cerebrospinal fluid and hydrocephalus
Keywords
blood-brain barrier, brain aging, transcytosis, receptor-mediated transport, pericyte coverage, ALPL, transferrin, transferrin receptor, plasma proteome, brain endothelium, BBB dysfunction, brain drug delivery
MeSH terms
Aging, Alkaline Phosphatase, Animals, Antibodies, Biological Transport, Blood Proteins, Blood-Brain Barrier, Brain, Health, Humans, Male, Mice, Inbred C57BL, Plasma, Receptors, Transferrin, Transcription, Genetic, Transferrin, Drug Delivery Systems, Proteome, Mice, Transcytosis

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