title: Physical characterization of the "immunosignaturing effect".
abstract: Identifying new, effective biomarkers for diseases is proving to be a challenging problem. We have proposed that antibodies may offer a solution to this problem. The physical features and abundance of antibodies make them ideal biomarkers. Additionally, antibodies are often elicited early in the ontogeny of different chronic and infectious diseases. We previously reported that antibodies from patients with infectious disease and separately those with Alzheimer's disease display a characteristic and reproducible "immunosignature" on a microarray of 10,000 random sequence peptides. Here we investigate the physical and chemical parameters underlying how immunosignaturing works. We first show that a variety of monoclonal and polyclonal antibodies raised against different classes of antigens produce distinct profiles on this microarray and the relative affinities are determined. A proposal for how antibodies bind the random sequences is tested. Sera from vaccinated mice and people suffering from a fugal infection are individually assayed to determine the complexity of signals that can be distinguished. Based on these results, we propose that this simple, general and inexpensive system could be optimized to generate a new class of antibody biomarkers for a wide variety of diseases.
authors.affiliation: Biodesign Institute, Center for Innovations in Medicine, Arizona State University, Tempe, Arizona 85287, USA. Phillip.Stafford@asu.edu
authors.forename: Phillip
authors.initials: P
authors.lastname: Stafford
authors.forename: Rebecca
authors.initials: R
authors.lastname: Halperin
authors.forename: Joseph Bart
authors.initials: JB
authors.lastname: Legutki
authors.forename: Dewey Mitchell
authors.initials: DM
authors.lastname: Magee
authors.forename: John
authors.initials: J
authors.lastname: Galgiani
authors.forename: Stephen Albert
authors.initials: SA
authors.lastname: Johnston
mesh_terms: D000818:Animals; D000906:Antibodies / Q000097:blood* / Q000276:immunology; D015415:Biomarkers / Q000097:blood; D003047:Coccidioidomycosis / Q000097:blood / Q000276:immunology; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D008808:Mice, Inbred CBA; D009976:Orthomyxoviridae Infections / Q000097:blood / Q000276:immunology / Q000517:prevention & control; D010455:Peptides / Q000276:immunology; D040081:Protein Array Analysis; D014611:Vaccination
chemical_list: D000906:Antibodies; D015415:Biomarkers; D010455:Peptides