Effect of β7 integrin deficiency on MCp recruitment to the inflamed lung. (A) Number of lung MNCs recovered per mouse from OVA-sensitized C57BL/6 (▪) and β7 integrin-deficient (□) mice with and without aerosolized OVA challenges. Values are the mean ± SEM from 6 separate experiments with 7 determinations in each group. (B) Concentration of MCp's (MCp's/10⁶ MNCs) in the lungs of the same mice. (C) Total number of MCp's per mouse in the lungs of the same mice. ^*P < .05, ^**P < .01, as determined by the 2-tailed Student t test.