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CD248 (endosialin) is a transmembrane glycoprotein that is dynamically expressed on pericytes and fibroblasts during tissue development, tumour neovascularization and inflammation. Its role in tissue remodelling is associated with increased stromal cell proliferation and migration. We show that CD248 is also uniquely expressed by human, but not mouse (C57BL/6), CD8(+) naive T cells. CD248 is found only on CD8(+) CCR7(+) CD11a(low) naive T cells and on CD8 single-positive T cells in the thymus. Transfection of the CD248 negative T-cell line MOLT-4 with CD248 cDNA surprisingly reduced cell proliferation. Knock-down of CD248 on naive CD8 T cells increased cell proliferation. These data demonstrate opposing functions for CD248 on haematopoietic (CD8(+)) versus stromal cells and suggests that CD248 helps to maintain naive CD8(+) human T cells in a quiescent state.

Original publication

DOI

10.1111/j.1365-2567.2011.03437.x

Type

Journal article

Journal

Immunology

Publication Date

07/2011

Volume

133

Pages

288 - 295

Addresses

Rheumatology Research Group, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Edgbaston, UK.

Keywords

CD8-Positive T-Lymphocytes, Stromal Cells, Animals, Humans, Mice, Antigens, CD, Antigens, Neoplasm, Blotting, Western, Flow Cytometry, Cell Proliferation