S100A9 and B-cell chronic lymphocytic leukemia: A study realized in an Eμ-TCL1 CLL murine model indicated that stromal cells from red pulp and the marginal zone of spleens presented LCs infiltrate, overexpressed genes related to neutrophil chemotaxis, including the chemotactic factors S100A8 and S100A9 (MRP8 and MRP14, respectively), the chemokine receptor CXCR2, the pro-inflammatory cytokine IL-1β, and integrin CD11b (Itgam) (65, 66).