Cited by 211Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchCholesterol and Lipid Metabolism

Metabolic Network Analysis Reveals Altered Bile Acid Synthesis and Metabolism in Alzheimer’s Disease

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Baloni, Priyanka, Funk, Cory C., Yan, Jingwen, Yurkovich, James T., Kueider-Paisley, Alexandra, Nho, Kwangsik, Heinken, Almut, Jia, Wei +54 more·2020·Cell Reports Medicine

Abstract

Increasing evidence suggests Alzheimer's disease (AD) pathophysiology is influenced by primary and secondary bile acids, the end product of cholesterol metabolism. We analyze 2,114 post-mortem brain transcriptomes and identify genes in the alternative bile acid synthesis pathway to be expressed in the brain. A targeted metabolomic analysis of primary and secondary bile acids measured from post-mortem brain samples of 111 individuals supports these results. Our metabolic network analysis suggests that taurine transport, bile acid synthesis, and cholesterol metabolism differ in AD and cognitively normal individuals. We also identify putative transcription factors regulating metabolic genes and influencing altered metabolism in AD. Intriguingly, some bile acids measured in brain tissue cannot be explained by the presence of enzymes responsible for their synthesis, suggesting that they may originate from the gut microbiome and are transported to the brain. These findings motivate further research into bile acid metabolism in AD to elucidate their possible connection to cognitive decline.

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Crossref · 10.1016/j.xcrm.2020.100138

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  • Studies in AD patients report a consistent pattern of reduced levels of primary bile acids and elevated levels of secondary bile acids.

    “Although studies in AD patients have yielded slightly heterogeneous results in BA composition, they have reported a consistent pattern of reduced levels of primary BAs and elevated levels of secondary BAs.”
  • Secondary bile acids associated with AD and cognitive impairments include DCA, LCA, glycodeoxycholic acid, taurodeoxycholic acid, glycolithocholic acid, and taurolithocholic acid.

    “Secondary BAs associated with AD and cognitive impairments include DCA, LCA, glycodeoxycholic acid, taurodeoxycholic acid, glycolithocholic acid, and taurolithocholic acid.355–358”
  • BA receptors are present in the brain, and BAs can be synthesized locally or actively transported across the BBB by BA transporters from circulation.

    “BA receptors are present in the brain, and BAs can either be synthesized locally or actively transported across the BBB by BA transporters from circulation (297, 301, 302).”
  • Altered bile acid profiles are observed in several neuropathologies associated with cognitive decline, such as Alzheimer's disease.

    “Altered BA profiles have been observed in several neuropathologies associated with cognitive decline, such as Alzheimer’s disease (302, 324).”

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Authors
Baloni, P., Funk, C. C., Yan, J., Yurkovich, J. T., Kueider-Paisley, A., Nho, K., Heinken, A., Jia, W., Mahmoudiandehkordi, S., Louie, G., Saykin, A. J., Arnold, M., Kastenmüller, G., Griffiths, W. J., Thiele, I., Kaddurah-Daouk, R., Kueider-Paisley, A., Louie, G., Doraiswamy, P. M., Blach, C., Moseley, A., Thompson, J. W., Mahmoudiandehkhordi, S., Welsh-Balmer, K., Plassman, B., Saykin, A., Nho, K., Kastenmüller, G., Arnold, M., Bhattacharyya, S., Han, X., Baillie, R., Fiehn, O., Barupal, D., Meikle, P., Mazmanian, S., Kling, M., Shaw, L., Trojanowski, J., Toledo, J., van Duijin, C., Hankemier, T., Thiele, I., Heinken, A., Price, N., Funk, C., Baloni, P., Jia, W., Wishart, D., Brinton, R., Chang, R., Farrer, L., Au, R., Qiu, W., Würtz, P., Mangravite, L., Krumsiek, J., Newman, J., Zhang, B., Moreno, H., Kaddurah-Daouk, R., & Price, N. D.
Affiliations
  • Indiana University Indianapolis (US)
  • Institute for Systems Biology (US)
  • Duke University (US)
  • Swansea University (GB)
  • Helmholtz Munich (DE)
  • University of Hawaii Cancer Center (US)
Venue
Cell Reports Medicine
Publisher
Elsevier BV
Published
2020-11
Volume
1
Issue
8
Pages
100138
ISSN
2666-3791 (ISSN-L)
OpenAlex
W3099584915
Cited by
211
References
85
Citations by year
2026: 30 · 2025: 36 · 2024: 47 · 2023: 39 · 2022: 30 · 2021: 27 · 2019: 1
FWCI
14.43
Type
journal article
Language
en
Open access
Locations
  • Cell Reports Medicine (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by-nc-nd)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by-nc-nd)
  • PuSH - Publication Server of Helmholtz Zentrum München (submittedVersion, cc-by-nc-nd)
  • IUScholarWorks (Indiana University) (submittedVersion, cc-by-nc-nd)
Funders
  • Biotechnology and Biological Sciences Research Council (BB/I001735/1, BB/N015932/1)
  • National Institute on Aging (RF1 AG0151550, R01AG046171, U01AG46152, R01 AG057452, RF1 AG058942, R01AG17917, P30AG10161, R01AG15819)
  • Engineering and Physical Sciences Research Council
  • National Institutes of Health (R01 CA129769, R01 AG019771, P30 AG010133)
  • Qatar National Research Fund (NLM R01 LM012535, NPRP8-061-3-011, R03 AG054936)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
Alzheimer's disease, bile acid synthesis, bile acid metabolism, cholesterol metabolism, taurine transport, metabolic network analysis, gut microbiota, transcription factors, cognitive decline, brain metabolomics
MeSH terms
Alzheimer Disease, Bile Acids and Salts, Brain, Cholesterol, Humans, Lipogenesis, Lipid Metabolism, Metabolic Networks and Pathways, Metabolomics, Transcriptome, Cognitive Dysfunction

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