Abstract
Recently, we showed that post cyclophosphamide (CTX) microenvironment benefits the function of transferred T cells. Analysis of the kinetics of cellular recovery after CTX treatment showed that a single 4mg/mouse CTX treatment decreased the absolute number of leukocytes in the peripheral blood (PBL) at days 3–15, and in the spleen and bone marrow (BM) at days 3–6. The absolute numbers of CD11c+CD11b− and CD11c+CD11b+ dendritic cells (DCs), CD11b+ and Ly6G+ myeloid cells, T and B cells, CD4+CD25+ T regulatory (Treg) cells, and NK1.1+ cells also decreased. The cell numbers returned to control levels during the recovery phase. The absolute numbers of B cells remained low for 3weeks. The numbers of DCs increased in PBL and spleen at day 9 but returned to control levels at day 15. These data indicate that CTX alters the cellular microenvironment in kinetics that might be precisely targeted to benefit the host.
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