Hematopoietic miR-33 deficiency increases peripheral Ly6Chigh monocytes without nonhematopoietic miR-33 deficiency. (A) Experimental protocol for the competitive repopulation assay. (B) The percentage of CD45.2+ leukocytes, Ly6Chigh monocytes, and CD11b+ myeloid cells, as indicated, in PB from CD45.1+ miR-33+/+ mice transplanted with equally mixed CD45.1+ miR-33+/+ and CD45.2+ miR-33+/+ (miR-33+/+ group) or CD45.2+ miR-33−/− BM (miR-33−/− group) cells (miR-33+/+ group, n = 5; miR-33−/− group, n = 14). (C) The percentage of CD45.2+ LSK and LK cells in the miR-33+/+ group and the miR-33−/− group (miR-33+/+ group, n = 5;, miR-33−/− group, n = 14). All data are shown as means ± SEM. *, P < 0.05; **, P < 0.01 (by Mann-Whitney U test).