Cited by 291Immune Response and InflammationInflammation biomarkers and pathwaysPhagocytosis and Immune Regulation

Pattern Recognition by TREM-2: Binding of Anionic Ligands

Daws, Michael R, Sullam, Paul M, Niemi, Eréne C, Chen, Thomas T, Tchao, Nadia K, Seaman, William E·2003·The Journal of Immunology

Abstract

We recently described the cloning of murine triggering receptor expressed by myeloid cells (TREM) 2, a single Ig domain DNAX adaptor protein 12-associated receptor expressed by cells of the myeloid lineage. In this study, we describe the identification of ligands for TREM-2 on both bacteria and mammalian cells. First, by using a TREM-2A/IgG1-Fc fusion protein, we demonstrate specific binding to a number of Gram-negative and Gram-positive bacteria and to yeast. Furthermore, we show that fluorescently labeled Escherichia coli and Staphylococcus aureus bind specifically to TREM-2-transfected cells. The binding of TREM-2A/Ig fusion protein to E. coli can be inhibited by the bacterial products LPS, lipoteichoic acid, and peptidoglycan. Additionally, binding can be inhibited by a number of other anionic carbohydrate molecules, including dextran sulfate, suggesting that ligand recognition is based partly on charge. Using a sensitive reporter assay, we demonstrate activation of a TREM-2A/CD3ζ chimeric receptor by both bacteria and dextran sulfate. Finally, we demonstrate binding of TREM-2A/Ig fusion to a series of human astrocytoma lines but not to a variety of other cell lines. The binding to astrocytomas, like binding to bacteria, is inhibited by anionic bacterial products, suggesting either a similar charge-based ligand recognition method or overlapping binding sites for recognition of self- and pathogen-expressed ligands.

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Crossref · 10.4049/jimmunol.171.2.594

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  • Sequence variants of the LPS-receptor TLR4 and the LPS-binding receptor TREM2 are associated with an increased risk of Alzheimer's disease.

    “Sequence variants of the LPS-receptor TLR4 [84] and the LPS-binding receptor TREM2 [22] are also associated with an increased risk of AD, indicating additional genetic links between AD and endotoxin.”

    From The endotoxin hypothesis of neurodegeneration (2019) · cites this paper as [22]

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Authors
Daws, M. R., Sullam, P. M., Niemi, E. C., Chen, T. T., Tchao, N. K., & Seaman, W. E.
Affiliations
  • San Francisco VA Medical Center (US)
  • Department of Immunology, Veterans Affairs Medical Center and University of California , San Francisco
  • University of California, San Francisco (US)
Venue
The Journal of Immunology
Published
2003-07
Volume
171
Issue
2
Pages
594-599
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2101372125
Cited by
291
References
44
Citations by year
2026: 12 · 2025: 17 · 2024: 14 · 2023: 17 · 2022: 20 · 2021: 17 · 2020: 20 · 2019: 11 · 2018: 21 · 2017: 16 · 2016: 11 · 2015: 15 · 2014: 12 · 2013: 9 · 2012: 7
FWCI
3.25
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Veterans Affairs
  • National Cancer Institute (R01CA087922, R01 CA87922-01A1)
  • National Institute of Allergy and Infectious Diseases (AI41513, R01AI041513)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Immunology and Microbiology › Immunology › Inflammation biomarkers and pathways
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
Keywords
TREM2, pattern recognition, myeloid cells, Gram-negative bacteria, Gram-positive bacteria, Escherichia coli, Staphylococcus aureus, yeast, lipopolysaccharide, lipoteichoic acid, peptidoglycan, dextran sulfate, astrocytoma, innate immunity, receptor activation
MeSH terms
Animals, Anions, Astrocytoma, Bacterial Adhesion, Binding, Competitive, Gram-Negative Bacteria, Gram-Positive Bacteria, Humans, Immunoglobulin Fc Fragments, Leukemia P388, Ligands, Lipopolysaccharides, Peptidoglycan, Protein Binding, Receptors, Immunologic, Recombinant Fusion Proteins, Solubility, Teichoic Acids, Transfection, Tumor Cells, Cultured, Dextran Sulfate, Jurkat Cells, Mice

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