(a) The number of total cell and percentages of eosinophil in bronchoalveolar lavage fluid (BALF). Results were shown as mean ± 1 standard deviation (s.d.) (n = 6). ***P < 0·001, versus healthy control, ###P < 0·001, versus ovalbumin (OVA)-sensitized/challenged mice, ^^^P < 0·001 versus OVA-sensitized/challenged mice given dendritic cells-cytotoxic T lymphocyte antigen 4 immunoglobulin (DC-CTLA4Ig). (b–f) Lung sections stained with haematoxylin and eosin (H&E): (b) healthy control mice; (c) OVA-sensitized/challenged mice; (d) OVA-sensitized/challenged mice given DC-CTLA4Ig; (e) OVA-sensitized/challenged mice given DCs; and (f) OVA-sensitized/challenged mice given DC-GFP. (g) Enhanced pause (Penh) of mice in all groups. Results were presented as mean ± s.d. (n = 6). ***P < 0·001, versus healthy control, ###P < 0·001, versus OVA-sensitized/challenged mice.