Localization and Upregulation of the Nasal Histamine H1 Receptor in Perennial Allergic Rhinitis

Figure 4

Immunohistochemical localization of histamine H1 receptor on human nasal mucosa. Inferior turbinates were stained with anti-human H1 receptor antibody (a, b) or normal rabbit immunoglobulin (c). The intensity of the H1 receptor staining was decreased by coincubation with a specific blocking peptide (b). Scale bar = 100 μm.

(a)

(b)

(c)