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Cited by 209

The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.

Modulation of CD28 Expression: Distinct Regulatory Pathways During Activation and Replicative Senescence

Open access
Vallejo, Abbe N, Brandes, Johann C, Weyand, Cornelia M, Goronzy, Jörg J·1999·The Journal of Immunology

Abstract

The costimulatory molecule CD28 has a restricted tissue distribution and is expressed on T cells and some plasmacytoma cells. Although CD28 is constitutively expressed, its expression is transiently down-regulated following T cell activation and declines progressively with in vitro senescence. In vivo, CD8+ T cells and, less frequently, CD4+ T cells may completely lose CD28 surface expression during chronic infections and with aging. This correlates with changes of nuclear protein-binding activities to two motifs, site α and β, within the CD28 minimal promoter. Both α- and β-bound complexes are found only in lymphoid tissues, in CD28+ T cells, and in some transformed B cells. These complexes are coordinately expressed except during replicative senescence, which is characterized by the down-modulation of site β- but not site α-binding activities. In contrast, T cell activation induces a parallel decline in both site α- and β-binding activities. CD4+ and CD8+ T cells differ in their β-binding profiles, which may explain the more pronounced down-regulation of CD28 in senescent CD8+ T cells. In vivo expanded CD4+CD28null and CD8+CD28null T cells uniformly lack α- and β-bound complexes, resembling the pattern seen in chronically activated cells and not of senescent cells.

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Metadata

Authors
Vallejo, A. N., Brandes, J. C., Weyand, C. M., & Goronzy, J. J.
Venue
The Journal of Immunology
Published
1999-06-01
Volume
162
Issue
11
Pages
6572-6579
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2160352261
Cited by
209
References
9
FWCI
2.78
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Modulation of CD28 Expression: Distinct Regulatory Pathways During Activation and Replicative Senescence. https://app.cochat.ai/papers/10.4049/jimmunol.162.11.6572
The paper
Vallejo, A. N., Brandes, J. C., Weyand, C. M., & Goronzy, J. J. (1999). Modulation of CD28 Expression: Distinct Regulatory Pathways During Activation and Replicative Senescence. The Journal of Immunology. https://doi.org/10.4049/jimmunol.162.11.6572

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.