title: Layered peptide arrays: high-throughput antibody screening of clinical samples.
abstract: High-throughput methods to detect and quantify antibodies in sera and other patient specimens have use for many clinical and laboratory studies, including those associated with cancer detection, microbial exposures, and autoimmune diseases. We developed a new technique, termed layered peptide array (LPA), to serve as a screening tool to detect antibodies in a highly multiplexed format. We demonstrate here that a prototype LPA was capable of producing approximately 5000 measurements per experiment and appeared to be scalable to higher throughput levels. Sera and saliva from Sjögren's syndrome patients served as a test set to examine antibody titers in clinical samples. The LPA platform exhibited both a high sensitivity (100%) and high specificity (94%) for correctly identifying SSB antigen-positive samples. The multiplex capability of the platform was also confirmed when serum and saliva samples were analyzed for antibody reactivity to several peptides, including Sjögren's syndrome antigens A and B. The data indicate that LPA analysis will be a useful method for a number of screening applications.
authors.affiliation: Pathogenetics Unit, Advanced Technology Center, Laboratory of Pathology and Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, 8717 Grovemont Circle, Bethesda, MD 20892-4605, USA.
authors.forename: Gallya
authors.initials: G
authors.lastname: Gannot
authors.forename: Michael A
authors.initials: MA
authors.lastname: Tangrea
authors.forename: John W
authors.initials: JW
authors.lastname: Gillespie
authors.forename: Heidi S
authors.initials: HS
authors.lastname: Erickson
authors.forename: Benjamin S
authors.initials: BS
authors.lastname: Wallis
authors.forename: Rose Anne
authors.initials: RA
authors.lastname: Leakan
authors.forename: Vladimir
authors.initials: V
authors.lastname: Knezevic
authors.forename: Dan P
authors.initials: DP
authors.lastname: Hartmann
authors.forename: Rodrigo F
authors.initials: RF
authors.lastname: Chuaqui
authors.forename: Michael R
authors.initials: MR
authors.lastname: Emmert-Buck
mesh_terms: D000906:Antibodies / Q000032:analysis* / Q000276:immunology*; D016000:Cluster Analysis; D006801:Humans; D008403:Mass Screening / Q000295:instrumentation / Q000379:methods*; D010455:Peptides / Q000737:chemistry / Q000276:immunology*; D040081:Protein Array Analysis / Q000295:instrumentation / Q000379:methods*; D012463:Saliva / Q000276:immunology; D012859:Sjogren's Syndrome / Q000097:blood / Q000175:diagnosis / Q000276:immunology
chemical_list: D000906:Antibodies; D010455:Peptides