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CUTTING EDGE |
* Schepens Eye Research Institute, Harvard Medical School, Boston, MA 02114; and
Pulmonary and Critical Care Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115
APC exposed to TGF
2 and Ag (tolerogenic APC) promote peripheral Ag-specific tolerance via the induction of CD8+ T regulatory cells capable of suppressing Th1 and Th2 immunity. We postulated that tolerogenic APC might reinstate tolerance toward self-neuronal Ags and ameliorate ongoing experimental autoimmune encephalomyelitis (EAE). Seven days after immunization with myelin basic protein (MBP), mice received MBP-specific tolerogenic APC, and EAE was evaluated clinically. To test for the presence and the phenotype of T regulatory cells, CD4 and/or CD8 T cells from tolerogenic APC-treated mice were transferred to naive mice before their immunization with MBP. The MBP-specific tolerogenic APC decreased both the severity and incidence of ongoing EAE. Tolerance to self-neuronal Ags was induced in naive recipient mice via adoptive transfer of CD8+, but not CD4+ T cells. Rational use of in vitro-generated tolerogenic APC may lead to novel therapy for autoimmune disease.
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