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- W2110630174 abstract "Few studies objectively evaluate olfactory function in animals following exposure to chemicals that induce nasal toxicity. An olfactometer capable of generating a reproducible olfactory stimulus and measuring an odorant-cued behavioral response was developed for rats from a commercially available two-way shuttle box. The box was modified to deliver the test odorant, acetaldehyde, to either of two chambers separated by a physical barrier consisting of a downward-directed airwall sandwiched between two exhaust panels. Male Fisher 344 rats were trained with either a coupled odorant- or tone-cued active avoidance paradigm in order to compare auditory-cued versus olfactory-cued learning and memory. Odorant-cued animals had faster acquisition and longer retention of the avoidance behavior than tone-cued animals. Animals given the model olfactory toxicant 3-methylindole (3-MI, 400 mg/kg, ip) had reduced odorant-cued avoidance, while no effect on tone-cued behavior was observed. In a follow-up study, additional odorant-trained rats were dosed with 0, 100, 200, or 300 mg/kg of 3-MI ip and olfactory function reassessed 6 days later. Histopathologic evidence of moderate to severe olfactory epithelial damage was observed in all rats 7 days after 3-MI administration. Only the highest 3-MI dose (300 mg/kg) was associated with a significant reduction in odor-cued avoidance behavior as compared to that seen in control. These results indicate that use of this olfactometer can provide a functional assessment of chemically induced olfactory toxicity and complements more routine nasal pathology." @default.
- W2110630174 created "2016-06-24" @default.
- W2110630174 creator A5091669967 @default.
- W2110630174 date "1996-09-01" @default.
- W2110630174 modified "2023-10-14" @default.
- W2110630174 title "Design and Evaluation of an Olfactometer for the Assessment of 3-Methylindole-Induced Hyposmia" @default.
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- W2110630174 doi "https://doi.org/10.1006/faat.1996.0143" @default.
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