Figure 4.
(A) Olfactory marker protein (OMP) immunohistochemistry of wild type control mice. Green staining indicates OMP, and blue staining is the nuclear marker, DAPI (250×). The white broken line indicates the basement membrane.; (B) OMP staining of IOI mice after administration of doxycycline for 6 weeks. The olfactory epithelium was significantly thinned, and considerable loss of olfactory receptor neurons was observed; (C) Neural cell adhesion molecule (NCAM) immunohistochemistry of wild type control mice. Red staining is NCAM (250×). Scale bar = 25µm; (D) NCAM staining of 6-week IOI mice. The diameter of the subepithelial axon bundle was significantly reduced.