Morphological Analysis of Olfactory Receptor Cells Using Whole-Mount Preparations of the Rat Nasal Mucosa.
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概要
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The distribution and entire shape of olfactory receptor cells were investigated by means of whole-mount preparations of the nasal mucosa. Whole mucosa isolated from the nasal septum of rats was processed, as "a free-floating section", and examined by the avidin-biotin complex (ABC) method using antisera against protein gene product 9.5 (PGP 9.5) and calbindin. Essentially all receptor cells were immunolabeled with the PGP 9.5 antiserum, but only half of PGP 9.5-immunoreactive cells were calbindin-immunoreactive. In the immunostaining of whole-mount preparations, pretreatment of tissues by freeze-thawing and dipping in ethanol and xylene greatly improved the permeability of antibodies. Overview of the nasal septum showed that the dorsal and ventral portions of the rostral olfactory area extended deeply into the respiratory area, making a "semi-lunar" shape. The boundary between the two areas was clearly demarcated, although several receptor cells were scattered in the respiratory area near the boundary. Observation at higher magnification clearly demonstrated that several axons derived from perikarya gathered to form nerve bundles showing a dendritic pattern. Proximal axons close to perikarya displayed beaded structures with intense immunoreactivity. They were electron-microscopically identified as swollen portions of axons which might be formed in association with the axonal flow. The present study showed that whole-mount preparation of the nasal mucosa for immunohistochemistry is a useful tool to analyze the morphology of olfactory receptor cells and axons.
- 公益社団法人 日本獣医学会の論文
著者
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Hosaka Yoshinao
Laboratory Of Anatomy Department Of Biomedical Sciences School Of Veterinary Medicine Hokkaido Unive
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Yanase Haruko
Laboratory Of Anatomy Department Of Biomedical Sciences Graduate School Of Veterinary Medicine Hokka
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Iwanaga Toshihiko
Laboratories Of Anatomy Graduate School Of Veterinary Medicine Hokkaido University
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