title: Human eosinophil-airway smooth muscle cell interactions.
abstract: Eosinophils are present throughout the airway wall of asthmatics. The nature of the interaction between human airway smooth muscle cells (ASMC) and eosinophils was investigated in this study. We demonstrated, using light microscopy, that freshly isolated eosinophils from healthy donors rapidly attach to ASMC in vitro. Numbers of attached eosinophils were highest at 2 h, falling to 50% of maximum by 20 h. Eosinophil attachment at 2 h was reduced to 72% of control by anti-VCAM-1, and to 74% at 20 h by anti-ICAM-1. Pre-treatment of ASMC for 24h with TNF-alpha, 10 nM, significantly increased eosinophil adhesion to 149 and 157% of control after 2 and 20 h. These results provide evidence that eosinophil interactions with ASMC involve VCAM-1 and ICAM-1 and are modulated by TNF-alpha.
authors.affiliation: Respiratory Research Group, Faculty of Pharmacy, University of Sydney, NSW, Australia. margh@pharm.usyd.edu.au
authors.forename: J M
authors.initials: JM
authors.lastname: Hughes
authors.forename: C A
authors.initials: CA
authors.lastname: Arthur
authors.forename: S
authors.initials: S
authors.lastname: Baracho
authors.forename: S M
authors.initials: SM
authors.lastname: Carlin
authors.forename: K M
authors.initials: KM
authors.lastname: Hawker
authors.forename: P R
authors.initials: PR
authors.lastname: Johnson
authors.forename: C L
authors.initials: CL
authors.lastname: Armour
mesh_terms: D002478:Cells, Cultured; D004804:Eosinophils / Q000187:drug effects / Q000502:physiology*; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000096:biosynthesis; D007375:Interleukin-1 / Q000494:pharmacology; D015848:Interleukin-5 / Q000494:pharmacology; D008168:Lung / Q000166:cytology / Q000502:physiology*; D009130:Muscle, Smooth / Q000166:cytology / Q000378:metabolism / Q000502:physiology*; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D019010:Vascular Cell Adhesion Molecule-1 / Q000096:biosynthesis
chemical_list: D007375:Interleukin-1; D015848:Interleukin-5; D014409:Tumor Necrosis Factor-alpha; D019010:Vascular Cell Adhesion Molecule-1; D018799:Intercellular Adhesion Molecule-1