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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Plain, Karren M. Verma, Nirupama D. Tran, Giang T. Nomura, Masaru Boyd, Rochelle Robinson, Catherine M. Hodgkinson, Suzanne J. Hall, Bruce M. |
| Description | Country affiliation: Australia Author Affiliation: Plain KM ( Immune Tolerance Laboratory Faculty of Medicine, University of New South Wales, Sydney, Australia.) |
| Abstract | IL-4 is thought to promote induction of transplantation tolerance and alloantigen-specific CD4(+)CD25(+) T regulatory cells (Treg). This study examined the effect of IL-4 on the induction and maintenance of the CD4(+) T regulatory cells (Treg) that mediate transplantation tolerance. Tolerance was induced in DA rats with PVG heterotopic cardiac allografts by a short course of cyclosporine. Naïve and tolerant lymphocytes, including the CD4(+) and CD4(+)CD25(+) T cell subsets, were assayed in mixed lymphocyte cultures with or without recombinant (r)IL-4 or other cytokines. The proliferation, cell surface and cytokine phenotype of these cells was examined, as was their capacity to adoptively transfer tolerance. rIL-4 enhanced the proliferation of naïve and tolerant lymphoid cells, including CD4(+) and CD4(+)CD25(+) T cells, but this was not alloantigen specific. Naïve or tolerant CD4(+) T cells cultured with rIL-4 and donor PVG antigen effected rapid graft rejection, even though before culture tolerant CD4(+) T cells transferred antigen-specific tolerance. These rIL-4 cultured CD4(+) T cells had a phenotype consistent with activated CD4(+)CD25(+)FoxP3(-) Th2 cells. While naïve natural CD4(+)CD25(+) T cells (nTreg) cultured with alloantigen and rIL-4 had enhanced proliferation and capacity to suppress rejection in vivo, the culture of tolerant CD4(+)CD25(+) T cells with alloantigen and rIL-4 could not sustain their proliferation against specific donor, nor their capacity to transfer tolerance to specific donor allograft. Thus, IL-4 promotes both regulatory and effector T cells early in the immune response, but once alloimmune tolerance is established, IL-4 promoted the activation of effector cells to mediate rejection and did not support alloantigen-specific Treg that could transfer specific tolerance. |
| File Format | HTM / HTML |
| ISSN | 09663274 |
| Issue Number | 1-4 |
| Volume Number | 29 |
| e-ISSN | 18785492 |
| Journal | Transplant Immunology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-12-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Transplantation Discipline Immunology Graft Rejection Immunology Interleukin-4 Pharmacology Isoantigens T-lymphocytes, Regulatory Transplantation Tolerance Drug Effects Allografts Animals Cell Proliferation Pathology Prevention & Control Graft Survival Rats Rats, Inbred Lew Th2 Cells Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Transplantation Immunology |
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