title: Microfluidic biochip for chemiluminescent detection of allergen-specific antibodies.
abstract: Protein microarrays for allergen-specific antibodies detection were integrated in microfluidic chips, with imaging chemiluminescence as the analytical technique. This paper demonstrates the feasibility of miniaturized chemiluminescent ELISA by presenting rapid, reproducible and sensitive detection of protein antibodies using microfluidics. Three different proteins, beta-lactoglobulin, peanut lectin and human IgG were immobilized via a "macromolecules to polydimethylsiloxane elastomer (PDMS) transfer" protocol and used as capturing agent for the detection of specific antibodies. A convenient and reversible procedure was used to bond the PDMS microarray substrate to complimentary SU-8/glass microfluidic reaction chambers. The hydrodynamic behaviours of the three proteins interactions within the micro-chambers were investigated to select the most efficient flowing parameters (come to terms with the assay time and performances). The use of optimized conditions led to the concomitant detection of three specific antibodies at pM level in 300 microL and using 6 min sample incubation time. Finally, sera from allergic patients were assayed using the microfluidic device modified with apple hazelnut and pollen allergen. The results obtained compared favourably with those obtained with the classical Pharmacia CAP system.
authors.affiliation: Laboratoire de Génie Enzymatique et Biomoléculaire, Université Lyon 1, CNRS 5246 ICBMS, Bât CPE, Villeurbanne Cedex, France.
authors.forename: Kevin A
authors.initials: KA
authors.lastname: Heyries
authors.forename: Michael G
authors.initials: MG
authors.lastname: Loughran
authors.forename: Daniel
authors.initials: D
authors.lastname: Hoffmann
authors.forename: Alexandra
authors.initials: A
authors.lastname: Homsy
authors.forename: Loïc J
authors.initials: LJ
authors.lastname: Blum
authors.forename: Christophe A
authors.initials: CA
authors.lastname: Marquette
mesh_terms: D000485:Allergens / Q000276:immunology*; D000906:Antibodies / Q000032:analysis* / Q000276:immunology*; D001681:Biological Assay / Q000295:instrumentation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D017022:Flow Injection Analysis / Q000295:instrumentation; D007118:Immunoassay / Q000295:instrumentation*; D008163:Luminescent Measurements / Q000295:instrumentation*; D046228:Microarray Analysis / Q000295:instrumentation*; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation* / Q000379:methods
chemical_list: D000485:Allergens; D000906:Antibodies