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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Immunohistology of the nasal mucosa in seasonal allergic rhinitis: increases in activated eosinophils and epithelial mast cells.
Journal of Allergy and Clinical Immunology 1992 April
The immunohistology of the nasal mucosa was examined in 13 grass pollen-sensitive patients and in seven normal nonatopic control subjects before and during the pollen season. Cryostat sections (6 microns) of biopsy specimens from the inferior turbinate were immunostained with the alkaline-phosphatase antialkaline-phosphatase method and a panel of monoclonal antibodies. Mast cell subtypes were measured with a double sequential immunostaining method. Within the submucosa, seasonal increases in total (MBP+, p less than 0.01) and "activated" (EG2+, p less than 0.01) eosinophils were observed for the patients, which were significant when these counts were compared with counts for those of control subjects (MBP+ p less than 0.01; EG2+ p less than 0.001). Within the nasal epithelium, seasonal increases in total (p less than 0.05) and "activated" (p less than 0.02) eosinophils were also observed. Mast cell counts revealed seasonal increases in tryptase-only positive mast cell (MCT) (p less than 0.02) but not chymase plus tryptase-positive mast cells (MCTC) within the epithelium that were significant when counts were compared with those of control subjects (p less than 0.03). No significant changes were observed within the submucosa or epithelium for total leukocytes (CD45+ cells) or T-lymphocytes (CD3+, CD4+, CD8+, and CD 25+ cells) for either group. Similarly, no significant changes were observed for neutrophils (antielastase), macrophages (CD68+), nor HLA-DR+ cells. In the subjects with rhinitis, seasonal submucosal CD3+ counts correlated with MBP+ eosinophils (r = 0.56; p less than 0.05) and MCTS (r = 0.65; p less than 0.02). Similarly, seasonal epithelial EG2+ eosinophil counts correlated with MCTs (r = 0.56; p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)
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