title: Cell-Based Odorant Sensor Array for Odor Discrimination Based on Insect Odorant Receptors.
abstract: The olfactory system of living organisms can accurately discriminate numerous odors by recognizing the pattern of activation of several odorant receptors (ORs). Thus, development of an odorant sensor array based on multiple ORs presents the possibility of mimicking biological odor discrimination mechanisms. Recently, we developed novel odorant sensor elements with high sensitivity and selectivity based on insect OR-expressing Sf21 cells that respond to target odorants by displaying increased fluorescence intensity. Here we introduce the development of an odorant sensor array composed of several Sf21 cell lines expressing different ORs. In this study, an array pattern of four cell lines expressing Or13a, Or56a, BmOR1, and BmOR3 was successfully created using a patterned polydimethylsiloxane film template and cell-immobilizing reagents, termed biocompatible anchor for membrane (BAM). We demonstrated that BAM could create a clear pattern of Sf21 sensor cells without impacting their odorant-sensing performance. Our sensor array showed odorant-specific response patterns toward both odorant mixtures and single odorant stimuli, allowing us to visualize the presence of 1-octen-3-ol, geosmin, bombykol, and bombykal as an increased fluorescence intensity in the region of Or13a, Or56a, BmOR1, and BmOR3 cell lines, respectively. Therefore, we successfully developed a new methodology for creating a cell-based odorant sensor array that enables us to discriminate multiple target odorants. Our method might be expanded into the development of an odorant sensor capable of detecting a large range of environmental odorants that might become a promising tool used in various applications including the study of insect semiochemicals and food contamination.
authors.affiliation: Graduate School of Information Science and Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
authors.forename: Maneerat
authors.initials: M
authors.lastname: Termtanasombat
authors.affiliation: Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan.
authors.forename: Hidefumi
authors.initials: H
authors.lastname: Mitsuno
authors.affiliation: Electronics-Inspired Interdisciplinary Research Institute, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.|Artificial Cell Membrane Systems Group, Kanagawa Academy of Science and Technology, KSP East 303, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa, 213-0012, Japan.
authors.forename: Nobuo
authors.initials: N
authors.lastname: Misawa
authors.affiliation: Department of Chemistry and Biotechnology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Yamahira
authors.affiliation: Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sakurai
authors.affiliation: Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yamaguchi
authors.affiliation: Department of Chemistry and Biotechnology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
authors.forename: Teruyuki
authors.initials: T
authors.lastname: Nagamune
authors.affiliation: Graduate School of Information Science and Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan. kanzaki@rcast.u-tokyo.ac.jp.|Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan. kanzaki@rcast.u-tokyo.ac.jp.
authors.forename: Ryohei
authors.initials: R
authors.lastname: Kanzaki
mesh_terms: D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects; D004129:Dimethylpolysiloxanes / Q000494:pharmacology; D006801:Humans; D019169:Jurkat Cells; D009812:Odorants / Q000032:analysis*; D018035:Receptors, Odorant / Q000235:genetics / Q000378:metabolism*; D061987:Sf9 Cells; D018411:Spodoptera; D046888:Tissue Array Analysis / Q000379:methods*
chemical_list: D004129:Dimethylpolysiloxanes; D018035:Receptors, Odorant; C013830:baysilon
keywords: Cell array patterning; Insect odorant receptor; Odor discrimination; Odorant sensor