TBI significantly upregulates whole BM cell transcript levels of SDF-1-cleaving proteases at the 4-week end point. Normalized mRNA levels of (A) DPPIV (**p<0.01), (B) neutrophil elastase (***p<0.001), (C) matrix metalloproteinase-2 (MMP-2) (***p<0.001), (D) cathepsin G, (E) carboxypeptidase M (***p<0.001), and (F) carboxypeptidase N (n.s., n=7 animals per group).