title: Phenotypic determination of T-lymphocytes responding to chemotactic stimulation from fMLP, IL-8, human IL-10, and epidermal lymphocyte chemotactic factor.
abstract: Human T lymphocytes were collected after they had migrated towards N-formyl-methionyl-leukylphenylalanine (fMLP), rIL-8, human IL-10 (hIL-10), and epidermal lymphocyte chemotactic factor (ELCF). They were stained for determination of their phenotype by FACS analysis using anti-CD4, -CD8, -CD18, -CD45R0 and OPD4 antibodies. Human IL-10 increased the percentage of CD8+ T lymphocytes in the migrating cell population by 152% compared with cells migrating towards the medium and decreased the number of CD4+ T lymphocytes by 79%. ELCF increased the number of CD4+ T lymphocytes by 18%, and the number of CD45R0+ T lymphocytes by 52%, while the number of CD8+ T lymphocytes was decreased by 20%. rIL-8 increased the number of CD4+ T lymphocytes and decreased the CD8+ T lymphocytes. The distribution of the different subpopulations of T lymphocytes was not changed significantly by fMLP. The observed changes in the phenotypes did not occur when incubating T lymphocytes with the chemotaxins. Our observations demonstrate that individual chemotactic factors will attract specific subsets of T lymphocytes. They may help to explain the predominance of memory T lymphocytes (CD4R0+, CD4+) in allergic contact dermatitis and certain other skin diseases. They also confirm the results of a recent study, that showed hIL-10 to be selectively chemotactic for CD8+ T lymphocytes.
authors.affiliation: Department of Dermatology, Marselisborg Hospital, Aarhus, Denmark.
authors.forename: C O
authors.initials: CO
authors.lastname: Zachariae
authors.forename: T
authors.initials: T
authors.lastname: Jinquan
authors.forename: V
authors.initials: V
authors.lastname: Nielsen
authors.forename: K
authors.initials: K
authors.lastname: Kaltoft
authors.forename: K
authors.initials: K
authors.lastname: Thestrup-Pedersen
mesh_terms: D015703:Antigens, CD / Q000032:analysis; D006801:Humans; D016753:Interleukin-10 / Q000494:pharmacology*; D019410:Interleukin-16; D016209:Interleukin-8 / Q000494:pharmacology*; D008222:Lymphokines / Q000494:pharmacology*; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology*; D010641:Phenotype; D013601:T-Lymphocytes / Q000187:drug effects* / Q000276:immunology
chemical_list: D015703:Antigens, CD; D019410:Interleukin-16; D016209:Interleukin-8; D008222:Lymphokines; D016753:Interleukin-10; D009240:N-Formylmethionine Leucyl-Phenylalanine