Effects of immunoglobulin G (IgG) on the expression of CD83, CD86 and CD49d in multiple sclerosis (MS) patients. Samples from MS patients (MS: CD83, n = 9; CD86, n = 4; CD49d, n = 8) and healthy controls (HC, n = 8) were analysed by flow cytometry for (a) CD83 on day 9, (b) CD86 on day 7 and (c) CD49d on day 9.