mRNA expression of VLA-4, CX3CR1, and CXCR4 is increased in peripheral blood T cells of ITP patients. The results are presented as mean DNA microarray expression of (A) VLA-4, (B) CX3CR1, and (C) CXCR4. Data are from 2 separate cDNA synthesis and microarray hybridizations from pooled RNA, isolated from peripheral blood T cells of 5 ITP patients with active disease (platelet count < 50 × 10⁹ cells/L) and 5 healthy controls.