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Sperling AI, Sedy JR, Manjunath N, Kupfer A, Ardman B, Burkhardt JK. Cutting Edge: TCR Signaling Induces Selective Exclusion of CD43 from the T Cell-Antigen-Presenting Cell Contact Site. THE JOURNAL OF IMMUNOLOGY 1998. [DOI: 10.4049/jimmunol.161.12.6459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Abstract
CD43, a large highly glycosylated molecule, is arguably the most abundant molecule on the surface of T cells. Nevertheless, the function of CD43 remains unclear. Utilizing fluorescence microscopy, we find that CD43 is excluded from the T cell-APC contact site. This exclusion is Ag dependent since optimal CD43 exclusion requires Ag-pulsed APC, and since signaling through CD3, in the absence of any other receptor ligand interactions, can induce the modulation of CD43. These data suggest that CD43 may function as a barrier to nonspecific T cell-APC interactions that is removed as a result of T cell activation. Exclusion from the interaction site is a unique feature of CD43 and not universally found for all large highly glycosylated molecules since CD45 is not excluded. Thus, CD43 may represent a novel regulatory molecule on the T cell surface that can direct T cell interactions by changing its location on the cell surface.
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Affiliation(s)
- Anne I. Sperling
- *Section of Pulmonary and Critical Care Medicine of the Department of Medicine,
- †Committee on Immunology, and
| | - John R. Sedy
- *Section of Pulmonary and Critical Care Medicine of the Department of Medicine,
| | - N. Manjunath
- §Department of Medicine, Tupper Research Institute, Division of Hematology-Oncology, New England Medical Center Hospitals, Boston, MA 02111; and
| | - Abraham Kupfer
- ¶Division of Basic Science, Department of Pediatrics, National Jewish Medical and Research Center, Denver, CO 80206
| | - Blair Ardman
- §Department of Medicine, Tupper Research Institute, Division of Hematology-Oncology, New England Medical Center Hospitals, Boston, MA 02111; and
| | - Janis K. Burkhardt
- †Committee on Immunology, and
- ‡Department of Pathology, University of Chicago, Chicago, IL 60637
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Ostberg JR, Barth RK, Frelinger JG. The Roman god Janus: a paradigm for the function of CD43. IMMUNOLOGY TODAY 1998; 19:546-50. [PMID: 9864944 DOI: 10.1016/s0167-5699(98)01343-7] [Citation(s) in RCA: 117] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- J R Ostberg
- Dept of Immunology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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