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Relationship between olfactory function and olfactory neuronal population in C57BL6 mice injected intraperitoneally with 3-methylindole

Cited 15 time in Web of Science Cited 17 time in Scopus
Authors

Kim, Jeong-Whun; Hong, Sung-Lyong; Lee, Chul Hee; Jeon, Eun-Hee; Choi, Ah-Reum

Issue Date
2010-12
Publisher
MOSBY-ELSEVIER
Citation
OTOLARYNGOLOGY-HEAD AND NECK SURGERY; Vol.143 6; 837-842
Abstract
OBJECTIVE: It is not known how many olfactory receptor neurons should be intact to maintain olfaction in mouse models treated with 3-methylindole. The aim of this study is to investigate the relationship between a simple olfactory test outcome and the olfactory neuronal population. STUDY DESIGN: Mouse model. SETTING: Animal laboratory of the Seoul National University Bundang Hospital. SUBJECTS AND METHODS: Olfactory dysfunction was induced by intraperitoneal injection of 3-methylindole in 38 six-week-old female C57BL6 mice. Olfactory function was evaluated by a food-finding test following 72-hour starvation. The olfactory neuronal population was quantified by olfactory marker protein (OMP) expression. RESULTS: The average time for finding food was 8.1 seconds in control mice. It was 13.4, 84.4, 90.1, and 111.4 seconds for mice injected with 100, 200, 300, and 400 mu g/g of 3-methylindole, respectively. Harvesting the whole olfactory neuroepithelium, densitometric analysis showed significant decrease of OMP in the 300- and 400-mu g/g groups as compared with controls (18.8% and 17.5% of relative density, respectively). In the olfactory bulb, there was a significant decrease of OMP in the 200-, 300-, and 400-mu g/g groups (44.5%, 37.0%, and 9.0% of relative density, respectively). The food-finding time had a significant reverse correlation with the relative density of OMP both in the olfactory bulb and in the olfactory neuroepithelium. CONCLUSION: Our study showed that olfactory impairment was correlated with olfactory neuronal population in mice treated with 3-methylindole. The food-finding test would be a useful tool that could be easily performed without special training in the 3-methylindole-treated C57BL6 anosmic mouse model. Copyright (C) 2010 American Academy of Otolaryngology-Head and Neck Surgery Foundation. Published by Mosby, Inc. All rights reserved.
ISSN
0194-5998
Language
English
URI
https://hdl.handle.net/10371/78460
DOI
https://doi.org/10.1016/j.otohns.2010.08.016
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