This work was supported by a Grant-in-Aid for Scientific Research from the Communication Disorders Center of Korea University, Seoul, South Korea. The authors have no other funding, financial relationships, or conflicts of interest to disclose.
Increased expression of acidic mammalian chitinase and chitotriosidase in the nasal mucosa of patients with allergic rhinitis†
Version of Record online: 20 APR 2010
Copyright © 2010 The American Laryngological, Rhinological, and Otological Society, Inc.
Volume 120, Issue 5, pages 870–875, May 2010
How to Cite
Cho, W. S., Kim, T. H., Lee, H. M., Lee, S. H., Lee, S. H., Yoo, J. H., Kim, Y. S. and Lee, S. H. (2010), Increased expression of acidic mammalian chitinase and chitotriosidase in the nasal mucosa of patients with allergic rhinitis. The Laryngoscope, 120: 870–875. doi: 10.1002/lary.20863
- Issue online: 21 APR 2010
- Version of Record online: 20 APR 2010
- Manuscript Accepted: 8 JAN 2010
- Acidic mammalian chitinase;
- allergic nasal mucosa;
- Level of Evidence: 5.
Acidic mammalian chitinase (AMCase) has emerged as an important mediator of allergic asthma in both animal models and in humans. Recently, chitotriosidase has been suggested to play a role in innate immunity because of its phagocytic-specific expression. Thus, AMCase and chitotriosidase may play a role in the pathogenesis of allergic nasal mucosa. The expression and pattern of distribution of AMCase and chitotriosidase were, therefore, determined in normal and allergic nasal mucosa.
Controlled, prospective study.
Normal inferior turbinate mucosa was obtained in patients who were admitted for augmentation rhinoplasty. Allergic turbinate mucosa was obtained from patients who had perennial allergic rhinitis during septo-turbinate surgery. Reverse transcriptase-polymerase chain reaction (RT-PCR), immunohistochemistry, and Western blotting were applied to the normal and allergic nasal mucosa.
The expression of AMCase and chitotriosidase mRNAs and proteins analyzed by RT-PCR and Western blot were detected in all normal and allergic turbinate mucosa tested. The levels of expression of AMCase and chitotriosidase mRNAs and proteins were increased in allergic turbinate mucosa compared with normal turbinate mucosa. In both normal and allergic turbinate mucosa, AMCase and chitotriosidase were detected in the epithelium, inflammatory cells, and submucosal glands. The staining intensity for AMCase and chitotriosidase was stronger in allergic nasal mucosa than normal nasal mucosa.
AMCase and chitotriosidase are constitutively expressed in normal turbinate mucosa, suggesting involvement in defense against chitin-containing pathogens. Upregulation of these chitinases in allergic condition suggests that they may play a role in the nasal allergic reaction like other inflammatory mediators in allergic rhinitis. Laryngoscope, 2010