There were no significant differences in pneumonitis and sialadenitis among control, CD4+CD25- T cell-transferred, and CD4+CD25- CCR2-transferred MRL/lpr mice (lesion index: perivascular 1.48 ± 0.23 versus 1.51 ± 0.07 versus 1.35 ± 0.41, peribronchiolar 1.48 ± 0.41 versus 1.55 ± 0.22 versus 1.49 ± 0.19, alveolar 1.25 ± 0.18 versus 1.29 ± 0.17 versus 1.24 ± 0.11, and sialadenitis 1.24 ± 0.19 versus 1.19 ± 0.37 versus 1.20 ± 0.33, respectively; n = 4 per group). Here, CCR2 is linked to pneumonitis.