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From * The Cleveland Clinic Foundation, The migratory properties of memory T cells provide a model vector system for site-specific delivery of therapeutic transgene factors to autoimmune inflammatory lesions. Lymph node cells
from (SWR×SJL)F1 mice immunized with the p139-151 determinant of myelin proteolipid
protein (PLP) were transfected with a DNA construct that placed the anti-inflammatory cytokine interleukin-10 (IL-10) cDNA under control of an antigen-inducible IL-2 promoter region. Isolated T cell clones demonstrated antigen-inducible expression of transgene IL-10 and
expressed cell surface markers consistent with the phenotype of normal memory T cells. Upon
adoptive transfer, transfected T cell clones were able to inhibit onset of experimental autoimmune encephalomyelitis (EAE) and to treat EAE animals therapeutically after onset of neurologic signs. Semiquantitative immunocytochemistry showed a significant correlation between
decreased demyelination and treatment with the transfected T cells. Taken together, these data
indicate the autoreactive T cells can be genetically designed to produce therapeutic factors in
an antigen-inducible manner resulting in a decreased severity of clinical and histological autoimmune demyelinating disease.
The Cleveland Clinic Confocal Core Facility, Cleveland, Ohio 44195
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