Fig. 4. Recruitment of polymorphonuclear cells (PMN) to a local site of inflammation. At 2 h after Freund complete adjuvant inoculation, significantly more leukocytes (A , CD45⁺cells) and PMN (B , RP-1⁺cells, both *P < 0.05) were present in the inflamed paw of rats treated with granulocyte colony-stimulating factor (G-CSF) stem cell factor (SCF) (black bar = solvent; white bar = G-CSF+SCF; n = 6 or 7) compared to controls. Monocytes/macrophages (C , ED1⁺cells) and lymphocytes (D , CD3⁺cells) were unchanged (both P > 0.05 [not significant], all t  test).