Abstract:
:Effects of several cytokines on kinetics of Intercellular Adhesion Molecule-1 (ICAM-1) and Vascular Cell Adhesion Molecule-1 (VCAM-1) expression were studied on a bronchial epithelial cell line (BEAS-2B). VCAM-I was neither constitutively expressed on BEAS-2B cells nor induced by Interferon-gamma (IFN-gamma). Tumor Necrosis Factor-alpha (TNF-alpha), Interleukin-1beta (IL-1beta), IFN-alpha, IL-4, IL-6, IL-8 or Granulocyte Macrophage-Colony Stimulating Factor (GM-CSF). ICAM-1 was constitutively expressed on BEAS-2B cells. IFN-gamma and TNF-alpha upregulated ICAM-1 expression on these cells. The functional importance of IFN-gamma plus TNF-a upregulation of ICAM-1 expression on BEAS-2B cells was demonstrated by neutrophil-BEAS-2B cell adhesion assays. Cytokines are rapidly released and cleared in animals. Therefore, transient cytokine(s) exposure might occur on the bronchial mucosa. Brief incubation of BEAS-2B cells with IFN-gamma plus TNF-alpha led initial upregulation of ICAM-1 expression followed by a protracted downregulation. Our findings stress the importance of studying the mechanism(s) controlling the persistent increased expression of ICAM-1 after brief cytokine(s) exposure.
journal_name
Inflammationjournal_title
Inflammationauthors
Subauste MC,Choi DC,Proud Ddoi
10.1023/a:1012850630351keywords:
subject
Has Abstractpub_date
2001-12-01 00:00:00pages
373-80issue
6eissn
0360-3997issn
1573-2576journal_volume
25pub_type
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