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Ovalbumin sensitization and challenge results in increased NGF expression levels in mice. (A) Relative expression of NGF in the lungs was determined using western blot analysis (n=4). (B) NGF protein concentration in the serum was analyzed using an ELISA (n=7). Data are expressed as the mean ± standard deviation of individual groups. *P<0.05, vs. control group; ▲P<0.05, vs. asthma and control IgG groups. NGF, nerve growth factor; IgG, immunoglobulin G.
