Upregulation of FKBP5 was found in the data set of peripheral blood cells from three MS patients with high serum levels of transmembrane-type semaphorin (Sema4A) (but not from MS patients with low Sema4A levels), compared with four healthy controls with low serum levels of Sema4A (61). This evidence concerns the gene FKBP5 and myeloid sarcoma.