title: Characterizing extravascular neutrophil migration in vivo in the iris.
abstract: Extravascular neutrophil migration is poorly characterized in vivo. To test the hypothesis that this migration is a non-random process, we used videomicroscopy to monitor neutrophils in irises of living mice with endotoxin-induced uveitis (EIU). Paths of individual cells were analyzed. Nearly all of these cells were moving in divergent directions, and mean displacement plots indicated that the predominant movement was random. The paths of some cells were fit to bivariate autoregressive integrated moving average models that revealed at least two modes of movement: random search and linear trend. Cell speed was significantly reduced by the actin inhibitor, cytochalasin D. The pattern of migration for neutrophils is in marked contrast to what we previously described for antigen-presenting cells in the iris, but somewhat resembles recent descriptions for T cells within a lymph node. Characterization of extravascular migration of neutrophils has important implications for understanding infection and immunity.
authors.affiliation: Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, USA. plancks@ohsu.edu
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Planck
authors.forename: Matthias D
authors.initials: MD
authors.lastname: Becker
authors.forename: Sergio
authors.initials: S
authors.lastname: Crespo
authors.forename: Dongseok
authors.initials: D
authors.lastname: Choi
authors.forename: Kellen
authors.initials: K
authors.lastname: Galster
authors.forename: Kiera L
authors.initials: KL
authors.lastname: Garman
authors.forename: Rainer
authors.initials: R
authors.lastname: Nobiling
authors.forename: James T
authors.initials: JT
authors.lastname: Rosenbaum
mesh_terms: D000818:Animals; D002465:Cell Movement / Q000187:drug effects; D015638:Cytochalasin D / Q000494:pharmacology; D004195:Disease Models, Animal; D005109:Extracellular Matrix / Q000276:immunology; D005260:Female; D007498:Iris / Q000187:drug effects / Q000276:immunology*; D008070:Lipopolysaccharides; D051379:Mice; D008807:Mice, Inbred BALB C; D018715:Microscopy, Video; D018448:Models, Immunological; D020556:Neutrophil Infiltration / Q000187:drug effects; D009504:Neutrophils / Q000187:drug effects / Q000276:immunology*; D013997:Time Factors; D014605:Uveitis / Q000139:chemically induced / Q000276:immunology*
chemical_list: D008070:Lipopolysaccharides; C482199:lipopolysaccharide, E coli O55-B5; D015638:Cytochalasin D