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Comparative Evaluation of Sensitivity to Hexanal Between Human and Canine Olfactory Receptors

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  • Nanobiotechnology
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Abstract

It is known that a dog possesses much better sense of smell than a human. It has been reported that a dog has advantages (compared to a human) in the number of olfactory receptor (OR) genes, proteins and cells, and also nasal structure. However, a definitive reason for superior sensitivity of the canine olfactory system remains controversial. In this study, we compared sensitivity of human and canine olfactory receptors relative to the same condition. Human OR (hOR2W1) and canine OR (cfOR0312), previously identified to recognize hexanal, were inserted to the pcDNA3 vector. This vector was transfected to HEK293 cells. Hexanal-discriminating ability of ORs was confirmed using Fura-2 AM, a dye which illuminates when binding to calcium ions flowing into cells once olfactory signaling occurs. Consequently, cfOR0312 was more sensitive to hexanal than hOR2W1. Comparison of OR sensitivity would be one of the major factors in clarifying difference of sensitivity between human and canine olfactory systems.

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Authors and Affiliations

  1. School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Korea

    Sang Won Cho & Tai Hyun Park

  2. Institute of Chemical Processes, Seoul National University, Seoul, 08826, Korea

    Tai Hyun Park

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  1. Sang Won Cho
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Correspondence to Tai Hyun Park.

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Cho, S.W., Park, T.H. Comparative Evaluation of Sensitivity to Hexanal Between Human and Canine Olfactory Receptors. Biotechnol Bioproc E 24, 1007–1012 (2019). https://doi.org/10.1007/s12257-019-0265-5

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  • DOI: https://doi.org/10.1007/s12257-019-0265-5

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