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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sanjabi, Shomyseh Ishigame, Harumichi Mosaheb, Munir M. Flavell, Richard A. |
| Description | Country affiliation: United States Author Affiliation: Ishigame H ( Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.) |
| Abstract | Inflammatory and anti-inflammatory cytokines play an important role in the generation of effector and memory CD8(+) T cells. We used two different models, transgenic expression of truncated (dominant negative) form of TGF-ßRII (dnTGFßRII) and Cre-mediated deletion of the floxed TGF-ßRII to examine the role of TGF-ß signaling in the formation, function, and homeostatic proliferation of memory CD8(+) T cells. Blocking TGF-ß signaling in effector CD8(+) T cells using both of these models demonstrated a role for TGF-ß in regulating the number of short-lived effector cells but did not alter memory CD8(+) T cell formation and their function upon Listeria monocytogenes infection in mice. Interestingly, however, a massive lymphoproliferative disorder and cellular transformation were observed in Ag-experienced and homeostatically generated memory CD8(+) T cells only in cells that express the dnTGFßRII and not in cells with a complete deletion of TGF-ßRII. Furthermore, the development of transformed memory CD8(+) T cells expressing dnTGFßRII was IL-7- and IL-15-independent, and MHC class I was not required for their proliferation. We show that transgenic expression of the dnTGFßRII, rather than the absence of TGF-ßRII-mediated signaling, is responsible for dysregulated expansion of memory CD8(+) T cells. This study uncovers a previously unrecognized dominant function of the dnTGFßRII in CD8(+) T cell proliferation and cellular transformation, which is caused by a mechanism that is different from the absence of TGF-ß signaling. These results should be considered during both basic and translational studies where there is a desire to block TGF-ß signaling in CD8(+) T cells. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1300397 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 190 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2013-06-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cd8-positive T-lymphocytes Immunology Immunologic Memory Lymphoproliferative Disorders Protein-serine-threonine Kinases Receptors, Transforming Growth Factor Beta Signal Transduction Adoptive Transfer Animals Metabolism Flow Cytometry Listeriosis Lymphocyte Activation Mice Mice, Inbred C57bl Mice, Transgenic Real-time Polymerase Chain Reaction Reverse Transcriptase Polymerase Chain Reaction Transforming Growth Factor Beta Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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