title: Numbers matter: quantitative and dynamic analysis of the formation of an immunological synapse using imaging flow cytometry.
abstract: Activation of T lymphocytes by antigen-presenting cells (APC) results in the formation of an immunological synapse. Following contact with the target cell, key signaling and adhesion molecules polarize within minutes to hours to the T cell-APC interface. Multispectral imaging flow cytometry, a new technology which combines flow cytometry with imaging, was used to visualize and quantify the recruitment of the CD3epsilon and Lck signaling molecules during the evolution of an immune synapse. Using this technology, thousands of T cell/macrophage conjugates could be analyzed for each experimental time point. Following Ca++ triggered T cell activation, the dynamics of Lck and CD3epsilon recruitment to the synapse, analyzed by two independent methods, were comparable. However, CD3epsilon exhibited longer residence times (>8 min) at the synapse than Lck.
authors.affiliation: Immune Disease Institute, Harvard Medical School, 200 Longwood Avenue, Boston, Massachusetts 02115, USA.
authors.forename: Fariyal
authors.initials: F
authors.lastname: Ahmed
authors.forename: Sherree
authors.initials: S
authors.lastname: Friend
authors.forename: Thaddeus C
authors.initials: TC
authors.lastname: George
authors.forename: Natasha
authors.initials: N
authors.lastname: Barteneva
authors.forename: Judy
authors.initials: J
authors.lastname: Lieberman
mesh_terms: D000938:Antigen-Presenting Cells / Q000276:immunology*; D017252:CD3 Complex / Q000378:metabolism; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D002478:Cells, Cultured; D018920:Coculture Techniques; D005434:Flow Cytometry; D006801:Humans; D019044:Image Cytometry; D007091:Image Processing, Computer-Assisted; D054992:Immunological Synapses; D007700:Kinetics; D008213:Lymphocyte Activation; D019860:Lymphocyte Specific Protein Tyrosine Kinase p56(lck) / Q000378:metabolism; D008264:Macrophages / Q000276:immunology*; D021381:Protein Transport; D015398:Signal Transduction
chemical_list: D017252:CD3 Complex; C115335:CD3E protein, human; D019860:Lymphocyte Specific Protein Tyrosine Kinase p56(lck)