Fig. 6

a. Percentage of macrophages in the BALF after OVA challenge. b. Number of macrophages in the BALF after OVA challenge. c. Percentage of macrophages in the BALF after OVA sensitization and challenge. d. Number of macrophages in the BALF after OVA sensitization and challenge. See legend to Fig. 3 . In A and B, (*) P < 0.05 vs. PBS alone; (+) and (++) P < 0.05 and P < 0.01 vs. rutile NP. In C and D, (***) P < 0.001 vs. OVA alone; (+) P < 0.05 vs. OVA + rutile NP; (##) P < 0.01 vs. OVA + anatase NP