title: Antigen-specific T cell phenotyping microarrays using grating coupled surface plasmon resonance imaging and surface plasmon coupled emission.
abstract: The circulating population of peripheral T lymphocytes obtained from a blood sample can provide a large amount of information about an individual's medical status and history. Recent evidence indicates that the detection and functional characterization of antigen-specific T cell subsets within the circulating population may provide a diagnostic indicator of disease and has the potential to predict an individual's response to therapy. In this report, a microarray detection platform that combines grating-coupled surface plasmon resonance imaging (GCSPRI) and grating-coupled surface plasmon coupled emission (SPCE) fluorescence detection modalities were used to detect and characterize CD4(+) T cells. The microspot regions of interest (ROIs) printed on the array consisted of immobilized antibodies or peptide loaded MHC monomers (p/MHC) as T cell capture ligands mixed with additional antibodies as cytokine capture ligands covalently bound to the surface of a corrugated gold sensor chip. Using optimized parameters, an unlabeled influenza peptide reactive T cell clone could be detected at a frequency of 0.1% in a mixed T cell sample using GCSPRI. Additionally, after cell binding was quantified, differential TH1 cytokine secretion patterns from a T cell clone cultured under TH1 or TH2 inducing conditions was detected using an SPCE fluorescence based assay. Differences in the secretion patterns of 3 cytokines, characteristic of the inducing conditions, indicated that differences were a consequence of the functional status of the captured cells. A dual mode GCSPRI/SPCE assay can provide a rapid, high content T cell screening/characterization tool that is useful for diagnosing disease, evaluating vaccination efficacy, or assessing responses to immunotherapeutics.
authors: Department of Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, BSP 318, Storrs, CT 06269, USA. james.rice@uconn.edu
authors: James M
authors: JM
authors: Rice
authors: Lawrence J
authors: LJ
authors: Stern
authors: Ernest F
authors: EF
authors: Guignon
authors: David A
authors: DA
authors: Lawrence
authors: Michael A
authors: MA
authors: Lynes
mesh_terms: D000941:Antigens / Q000032:analysis / Q000276:immunology*; D002478:Cells, Cultured; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007118:Immunoassay / Q000295:instrumentation*; D010641:Phenotype; D040081:Protein Array Analysis / Q000295:instrumentation*; D012680:Sensitivity and Specificity; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013601:T-Lymphocytes / Q000145:classification* / Q000166:cytology / Q000276:immunology*
chemical_list: D000941:Antigens