The reason why EBV-specific cellular immune responses are abnormal in multiple sclerosis (MS) patients is still missing. In this exploratory pilot study, we assessed IL-1beta, IL-2, IL-4, IL-6, IL-10, IL-17, IFN-gamma, TGF-beta1 and FOXP3 mRNA expression in EBV-stimulated highly differentiated T cells (T(HD)) of MS patients and healthy controls (HC). We found increased levels of IFN-gamma and IL-4 mRNA in CD8+ T(HD) cells of MS patients. All the other tested molecules were expressed similarly in MS patients and HC. Interestingly, increased IFN-gamma and IL-4 suggest that the control of EBV replication may be insufficient in MS patients.
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