Reduced intestinal MCps in SIBR BALB/c mice receiving CXCR2^-/- BM. (A) MCp concentrations in the intestine, lung, spleen, and BM in SIBR mice receiving BALB/c BM (▪) and SIBR mice receiving CXCR2^-/- BM (□) evaluated in parallel. Values are the mean ± SEM for 4 separate experiments except BM, where values are the mean ± SEM for 3 separate experiments. ^*Statistical significance, with P < .01 relative to wild-type BM-reconstituted mice. (B) The absolute numbers of MCps per tissue for the same tissues shown in panel A.