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Niimi M, Pearson TC, Larsen CP, Alexander DZ, Hollenbaugh D, Aruffo A, Linsley PS, Thomas E, Campbell K, Fanslow WC, Geha RS, Morris PJ, Wood KJ. The Role of the CD40 Pathway in Alloantigen-Induced Hyporesponsiveness In Vivo. THE JOURNAL OF IMMUNOLOGY 1998. [DOI: 10.4049/jimmunol.161.10.5331] [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
Resting B (rB) cells are known to be incompetent APCs in vitro, which alone can induce specific unresponsiveness to single minor histocompatibility (miH) Ags and, when combined with CD40 pathway blockade, can induce hyporesponsiveness to MHC molecules in vivo. Here we show that anti-CD40 ligand (CD40L) mAb does not prevent the expression of B7-2 on allogeneic rB cells in vivo but did prolong donor-specific cardiac allograft survival. Moreover, pretreatment with professional APCs combined with anti-CD40L mAb induced hyporesponsiveness to alloantigens in vivo. rB cells from CD40 knockout mice were unable to induce unresponsiveness, while graft prolongation was achieved in CD40L knockout recipients pretreated with wild-type rB cells. These data suggest that CD40-CD40L interactions in the recipient play a critical role in the induction of hyporesponsiveness to alloantigens in vivo and that the effect of the CD40 pathway may be independent of its effect on the B7 costimulatory pathway.
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Affiliation(s)
- Masanori Niimi
- *Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Headington, Oxford, United Kingdom
| | - Thomas C. Pearson
- †Department of Surgery, Emory University School of Medicine, Atlanta, GA 30322
| | - Christian P. Larsen
- †Department of Surgery, Emory University School of Medicine, Atlanta, GA 30322
| | - Diane Z. Alexander
- †Department of Surgery, Emory University School of Medicine, Atlanta, GA 30322
| | - Diane Hollenbaugh
- ‡Bristol-Myers Squibb Pharmaceutical Research Institute, Seattle, WA 98121
| | - Alejandro Aruffo
- ‡Bristol-Myers Squibb Pharmaceutical Research Institute, Seattle, WA 98121
| | - Peter S. Linsley
- ‡Bristol-Myers Squibb Pharmaceutical Research Institute, Seattle, WA 98121
| | | | | | | | | | - Peter J. Morris
- *Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Headington, Oxford, United Kingdom
| | - Kathryn J. Wood
- *Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Headington, Oxford, United Kingdom
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