title: Development of a cluster of differentiation antibody-based protein microarray.
abstract: Protein microarrays combine aspects of DNA microarrays and ELISA for the parallel interrogation of a biological sample using a multiplex of protein biomarkers. Here we report the development of a protein microarray consisting of a subset of CD antibodies and CRP. Several preparations (culture supernatant, ascites fluid and purified Ig) of each antibody were used in a forward phase protein microarray. Microarrays were fabricated using a non-contact printer delivering 300 pL (+/-30 pL) to specific locations on polyacrylamide gel-based substrates. Following production, microarrays were blocked for non-specific binding and incubated with sera conjugated directly with Cy3. Using CRP as a control biomarker, 12 clinical samples (inflammatory conditions and controls) were interrogated using the protein microarray format and results compared to CRP measured by conventional immunoassay. The data obtained from the microarray correlated with CRP assessed by immunoassay. Subsequently CRP 'positive' samples were interrogated for CD antigen expression; which revealed CD25 and CD45RO expression in all samples. Whilst this study focussed on a subset of CD antibodies, it is anticipated that this array could be expanded to include a larger number of CD antibodies and allow screening of sera from multiple conditions in order to identify disease markers.
authors.affiliation: CSIRO Division of Health Sciences and Nutrition, 343 Royal Parade, Parkville, Victoria 3052, Australia. michael.abdo@csiro.au
authors.forename: Michael
authors.initials: M
authors.lastname: Abdo
authors.forename: Bob
authors.initials: B
authors.lastname: Irving
authors.forename: Peter
authors.initials: P
authors.lastname: Hudson
authors.forename: Heddy
authors.initials: H
authors.lastname: Zola
mesh_terms: D000906:Antibodies / Q000737:chemistry / Q000276:immunology*; D015703:Antigens, CD / Q000032:analysis* / Q000276:immunology; D002097:C-Reactive Protein / Q000032:analysis* / Q000276:immunology; D002232:Carbocyanines / Q000737:chemistry; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D017493:Leukocyte Common Antigens / Q000032:analysis / Q000276:immunology; D040081:Protein Array Analysis / Q000379:methods*; D015375:Receptors, Interleukin-2 / Q000032:analysis / Q000276:immunology
chemical_list: D000906:Antibodies; D015703:Antigens, CD; D002232:Carbocyanines; D015375:Receptors, Interleukin-2; C089187:cyanine dye 3; D002097:C-Reactive Protein; D017493:Leukocyte Common Antigens