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Abstract
Autoreactive CD4+ T cells can transfer experimental allergic neuritis (EAN) to naive recipients. In order to further analyze the role of these T cells and their corresponding cytokines in EAN, we studied the expression of mRNA for IFN- γ, IL-4, and IL-10 in the cauda equina of rats with EAN using a quantitative competitive reverse transcriptase PCR method. Nerves were studied on days 0 (pre-immunization), 10 (disease onset), 13 (clinical progression), 16 (disease peak), as well as 20, 24, and 34 post immunization (recovery). IFN- γ messages increased at disease onset and peaked at day 13 p.i. IL-10 message remained at a very low level at disease onset and surged at day 16. Both messages were low in recovery stage. IL-4 message was undetectable at any time point. These data suggest a pro-inflammatory role of IFN- γ and anti-inflammatory role of IL-10 in EAN lesions. It is also possible that a clonal switch from Th1 to Th2 occurs in EAN lesions during the disease course.
Published Version
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