IL4 and multiple sclerosis: Also, in an examination of NK-T cell populations between CIDP and multiple sclerosis patients, it was found that in multiple sclerosis patients there was a reduction in the presence of Vα24JαQ NK-T cells while in CIDP, there was a marked infiltration of this cell type along with the presence of IL-4 mRNA [27]; this is noteworthy because NK-T cells are potent cytokine producers.