alexa MR imaging of inflammation during myelin-specific T cell-mediated autoimmune attack in the EAE mouse spinal cord.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Robinson KM, Njus JM, Phillips DA, Proctor TM, Rooney WD,

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Abstract PURPOSE: The purpose of this study is to detect myelin-specific T cells, key pathological mediators in early multiple sclerosis, and the corresponding animal model, experimental autoimmune encephalomyelitis (EAE), in the mouse spinal cord. PROCEDURES: T cells were labeled with the iron-based, magnetic resonance (MR) contrast reagent, Feridex, and the transfection reagent, protamine sulfate, resulting in approximately 100\% iron-labeling efficiency. Feridex-labeling did not alter the induction of EAE by T cells, and recipients were imaged by a 12-T MR instrument. RESULTS: Focal hypointense lesions were resolvable to gray or white matter of the lumbar spinal cord in T(2)-weighted images of the recipients of Feridex-labeled T cells. Lesions corresponded to histological evidence of inflammatory lesions and iron-labeled cells in eight-of-eight mice. In contrast, hypointense lesions were not observed eight-of-eight recipients of unlabeled T cells. CONCLUSIONS: These results demonstrate and provide methodologies for labeling, detecting, and extracting MRI-detectable foci of iron-labeled cells. This article was published in Mol Imaging Biol and referenced in Journal of Clinical & Cellular Immunology

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