title: A compact immunoassay platform based on a multicapillary glass plate.
abstract: A highly sensitive, rapid immunoassay performed in the multi-channels of a micro-well array consisting of a multicapillary glass plate (MCP) and a polydimethylsiloxane (PDMS) slide is described. The micro-dimensions and large surface area of the MCP permitted the diffusion distance to be decreased and the reaction efficiency to be increased. To confirm the concept of the method, human immunoglobulin A (h-IgA) was measured using both the proposed immunoassay system and the traditional 96-well plate method. The proposed method resulted in a 1/5-fold decrease of immunoassay time, and a 1/56-fold cut in reagent consumption with a 0.05 ng/mL of limit of detection (LOD) for IgA. The method was also applied to saliva samples obtained from healthy volunteers. The results correlated well to those obtained by the 96-well plate method. The method has the potential for use in disease diagnostic or on-site immunoassays.
authors.affiliation: Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan. xue-shuhua@ed.tmu.ac.jp.
authors.forename: Shuhua
authors.initials: S
authors.lastname: Xue
authors.affiliation: Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan. zeng-hulie@tmu.ac.jp.
authors.forename: Hulie
authors.initials: H
authors.lastname: Zeng
authors.affiliation: Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan. yang-jianmin@ed.tmu.ac.jp.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Yang
authors.affiliation: Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan. nakajima-hizuru@tmu.ac.jp.
authors.forename: Hizuru
authors.initials: H
authors.lastname: Nakajima
authors.affiliation: Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan. uchiyama-katsumi@tmu.ac.jp.
authors.forename: Katsumi
authors.initials: K
authors.lastname: Uchiyama
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D002197:Capillary Action; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007118:Immunoassay / Q000295:instrumentation*; D007070:Immunoglobulin A / Q000032:analysis* / Q000276:immunology*; D046228:Microarray Analysis / Q000295:instrumentation*; D008904:Miniaturization; D015203:Reproducibility of Results; D012463:Saliva / Q000276:immunology*; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000295:instrumentation*
chemical_list: D007070:Immunoglobulin A