Cited by 70Phagocytosis and Immune RegulationCell death mechanisms and regulationCellular transport and secretion

Tethering of Apoptotic Cells to Phagocytes through Binding of CD47 to Src Homology 2 Domain-Bearing Protein Tyrosine Phosphatase Substrate-1

Tada, Kazutoshi, Tanaka, Masato, Hanayama, Rikinari, Miwa, Keiko, Shinohara, Azusa, Iwamatsu, Akihiro, Nagata, Shigekazu·2003·The Journal of Immunology

Abstract

Apoptotic cells are swiftly phagocytosed by macrophages and immature dendritic cells. In this study, we found that one mouse macrophage cell line (BAM3) engulfed apoptotic thymocytes, but not a lymphoma cell line (WR19L). mAbs that inhibited the phagocytosis of apoptotic thymocytes by BAM3 were identified. Purification of the Ag revealed that it was Src homology 2 domain-bearing protein tyrosine phosphatase substrate-1 (SHPS-1). CD47, the ligand for SHPS-1, was expressed in mouse thymocytes, but not in WR19L. When WR19L was transformed with CD47, the transformants, after induction of apoptosis, could be phagocytosed by BAM3. The WR19L transformants expressing CD47 were more efficiently engulfed in vivo by splenic dendritic cells than the parental WR19L. Masking of the phosphatidylserine exposed on apoptotic thymocytes inhibited the engulfment, whereas the anti-SHPS-1 mAb inhibited not only the engulfment, but also the binding of apoptotic cells to phagocytes. These results indicate that macrophages require CD47 and phosphatidylserine on apoptotic cells for engulfment, and suggest that the interaction between CD47 and SHPS-1 works as a tethering step in the phagocytosis.

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Crossref · 10.4049/jimmunol.171.11.5718

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Authors
Tada, K., Tanaka, M., Hanayama, R., Miwa, K., Shinohara, A., Iwamatsu, A., & Nagata, S.
Affiliations
  • The University of Osaka (JP)
  • RIKEN (JP)
  • Japan Science and Technology Agency (JP)
  • Kirin (Japan) (JP)
Venue
The Journal of Immunology
Published
2003-12-01
Volume
171
Issue
11
Pages
5718-5726
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W1874248542
Cited by
70
References
52
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 3 · 2018: 2 · 2017: 2 · 2016: 2 · 2015: 1 · 2014: 2 · 2013: 3 · 2012: 7
FWCI
2.82
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
phagocytosis of apoptotic cells, CD47, SIRPα, SH2D1A, macrophages, dendritic cells, phosphatidylserine exposure
MeSH terms
Animals, Antibodies, Monoclonal, Antigens, Differentiation, Carrier Proteins, Cell Line, Cricetulus, Female, Cricetinae, Humans, Macrophages, Membrane Glycoproteins, Mice, Inbred C57BL, Mice, Transgenic, Phagocytes, Phagocytosis, Phosphatidylserines, Protein Binding, Receptors, Immunologic, Substrate Specificity, Antigens, CD, Protein Tyrosine Phosphatases, Apoptosis, src Homology Domains, Neural Cell Adhesion Molecule L1, NIH 3T3 Cells, Cell Line, Tumor, Mice, CD47 Antigen

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