1
|
Hall BM, Fava L, Chen J, Plain KM, Boyd RA, Spicer ST, Berger MF. Anti-CD4 Monoclonal Antibody-Induced Tolerance to MHC-Incompatible Cardiac Allografts Maintained by CD4+ Suppressor T Cells That Are Not Dependent upon IL-4. THE JOURNAL OF IMMUNOLOGY 1998. [DOI: 10.4049/jimmunol.161.10.5147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Anti-CD4 mAb-induced tolerance to transplanted tissues has been proposed as due to down-regulation of Th1 cells by preferential induction of Th2 cytokines, especially IL-4. This study examined the role of CD4+ cells and cytokines in tolerance to fully allogeneic PVG strain heterotopic cardiac allografts induced in naive DA rats by treatment with MRC Ox38, a nondepleting anti-CD4 mAb. All grafts survived >100 days but had a minor mononuclear cell infiltrate that increased mRNA for the Th1 cytokines IL-2, IFN-γ, and TNF-β, but not for Th2 cytokines IL-4 and IL-6 or the cytolytic molecules perforin and granzyme A. These hosts accepted PVG skin grafts but rejected third-party grafts, which were not blocked by anti-IL-4 mAb. Cells from these tolerant hosts proliferated in MLC and produced IL-2, IFN-γ, and IL-4 at levels equivalent to naive cells. Unfractionated and CD4+ T cells, but not CD8+ T cells, transferred specific tolerance to irradiated heart grafted hosts and inhibited reconstitution of rejection by cotransferred naive cells. This transfer of tolerance was associated with normal induction of IL-2 and delayed induction of IFN-γ, but not with increased IL-4 or IL-10 mRNA. Transfer of tolerance was also not inhibited by anti-IL-4 mAb. This study demonstrated that tolerance induced by a nondepleting anti-CD4 mAb is maintained by a CD4+ suppressor T cell that is not associated with preferential induction of Th2 cytokines or the need for IL-4; nor is it associated with an inability to induce Th1 cytokines or anergy.
Collapse
Affiliation(s)
- Bruce M. Hall
- Department of Medicine, University of New South Wales, Liverpool Hospital, Liverpool, New South Wales, Australia
| | - Lisa Fava
- Department of Medicine, University of New South Wales, Liverpool Hospital, Liverpool, New South Wales, Australia
| | - Juchuan Chen
- Department of Medicine, University of New South Wales, Liverpool Hospital, Liverpool, New South Wales, Australia
| | - Karren M. Plain
- Department of Medicine, University of New South Wales, Liverpool Hospital, Liverpool, New South Wales, Australia
| | - Rochelle A. Boyd
- Department of Medicine, University of New South Wales, Liverpool Hospital, Liverpool, New South Wales, Australia
| | - S. Timothy Spicer
- Department of Medicine, University of New South Wales, Liverpool Hospital, Liverpool, New South Wales, Australia
| | - Manuela F. Berger
- Department of Medicine, University of New South Wales, Liverpool Hospital, Liverpool, New South Wales, Australia
| |
Collapse
|