Cited by 27Cholesterol and Lipid MetabolismExtracellular vesicles in diseaseLipid Membrane Structure and Behavior

Human cerebrospinal fluid contains diverse lipoprotein subspecies enriched in proteins implicated in central nervous system health

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Merrill, Nathaniel J., Davidson, W. Sean, He, Yi, Díaz Ludovico, Ivo, Sarkar, Snigdha, Berger, Madelyn R., McDermott, Jason E., Van Eldik, Linda J. +9 more·2023·Science Advances

Abstract

Lipoproteins in cerebrospinal fluid (CSF) of the central nervous system (CNS) resemble plasma high-density lipoproteins (HDLs), which are a compositionally and structurally diverse spectrum of nanoparticles with pleiotropic functionality. Whether CSF lipoproteins (CSF-Lps) exhibit similar heterogeneity is poorly understood because they are present at 100-fold lower concentrations than plasma HDL. To investigate the diversity of CSF-Lps, we developed a sensitive fluorescent technology to characterize lipoprotein subspecies in small volumes of human CSF. We identified 10 distinctly sized populations of CSF-Lps, most of which were larger than plasma HDL. Mass spectrometric analysis identified 303 proteins across the populations, over half of which have not been reported in plasma HDL. Computational analysis revealed that CSF-Lps are enriched in proteins important for wound healing, inflammation, immune response, and both neuron generation and development. Network analysis indicated that different subpopulations of CSF-Lps contain unique combinations of these proteins. Our study demonstrates that CSF-Lp subspecies likely exist that contain compositional signatures related to CNS health.

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  • The CNS primarily contains HDL-like particles, many of which harbor ApoE and can engage LDLR.

    “the CNS primarily contains HDL-like particles, many of which harbors ApoE and can thus engage LDLR56.”

    From Decreased lipidated ApoE‐receptor interactions confer protection against pathogenicity of ApoE and its lipid cargoes in lysosomes (2025) · cites this paper as [56]

    The Introduction describes CSF lipoproteins as HDL-like and says APOE is their primary scaffold protein; the Discussion reports that APOE co-elutes with the bulk of CSF lipid. But the paper does not say these particles engage LDLR, and its Results place the bulk of CSF lipoprotein lipid between the plasma VLDL/LDL and large-HDL size ranges, rather than establishing that the CNS primarily contains HDL-sized particles. Page numbers were not available in our copy. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • ApoE is associated with virtually all plasma LNPs, albeit in varying amounts.

    “ApoE is associated with virtually all plasma LNPs, albeit in varying amounts.5”

    From ApoE is Secreted as a Lipid Nanoparticle by Mammalian Cells: Implications for Alzheimer’s Disease Pathogenesis (2025) · cites this paper as [5]

    The Discussion (page unavailable) reports APOE across multiple cerebrospinal-fluid lipoprotein populations of various sizes. That supports a broad association in CSF, but not the claim that APOE is associated with virtually all plasma lipoprotein particles in varying amounts. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Authors
Merrill, N. J., Davidson, W. S., He, Y., Díaz Ludovico, I., Sarkar, S., Berger, M. R., McDermott, J. E., Van Eldik, L. J., Wilcock, D. M., Monroe, M. E., Kyle, J. E., Bruce, K. D., Heinecke, J. W., Vaisar, T., Raber, J., Quinn, J. F., & Melchior, J. T.
Affiliations
  • Pacific Northwest National Laboratory (US)
  • University of Cincinnati (US)
  • University of Washington (US)
  • Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354, USA.
  • Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40504, USA.
  • University of Kentucky (US)
  • University of Colorado Anschutz (US)
  • Department of Medicine, University of Washington School of Medicine, Seattle, WA 98109, USA.
  • Oregon Health & Science University (US)
Corresponding author
Melchior, John T.
Venue
Science Advances
Published
2023-09
Volume
9
Issue
35
Pages
eadi5571-eadi5571
ISSN
2375-2548 (ISSN-L)
OpenAlex
W4386276912
Cited by
27
References
73
Citations by year
2026: 9 · 2025: 13 · 2024: 4 · 2023: 1
FWCI
7.23
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Science Advances (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion, cc-by)
Funders
  • National Institutes of Health
  • National Institute on Aging (R03AG070480, P30AG066518, R01AG079217, P30AG072946)
  • National Heart, Lung, and Blood Institute (P01HL128203)
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
Keywords
high-density lipoprotein, wound healing, inflammation, immune response, neuronal development, protein network analysis
MeSH terms
Central Nervous System, Coloring Agents, Humans, Lipopolysaccharides, Lipoproteins, Lipoproteins, HDL

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