Document Detail

Chemokine Expression in Retinal Pigment Epithelial ARPE-19 Cells in Response to Co-culture with Activated T Cells.
MedLine Citation:
PMID:  23150618     Owner:  NLM     Status:  Publisher    
PURPOSE: To investigate the effects of T cell-derived cytokines on gene and protein expression of chemokines in a human RPE cell line (ARPE-19). METHODS: We used an in vitro co-culture system in which the RPE and CD3/CD28-activated T cells were separated by a membrane. RPE cell expression of chemokine genes was quantified using three different types of microarrays. Protein expression was determined by single- and multiplex ELISA and immunoblotting. RESULTS: Co-culture with activated T cells increased RPE mRNA and protein expression of chemokines CCL2 (MCP-1), CCL5 (RANTES), CCL7 (MCP-3), CCL8 (MCP-2), CXCL1 (GRO-α), IL8 (CXCL8), CXCL9 (MIG), CXCL10 (IP10), CXCL11 (ITAC), and CX3CL1 (fractalkine). CCL7, CXCL9, CXCL10, and CXCL11 were secreted significantly more in the apical direction. Using recombinant human cytokines and neutralizing antibodies we identified IFNγ and TNFα as the two major T cell-derived cytokines responsible for the RPE response. For CCL5, CXCL9, CXCL10, CXCL11, CXCL16, and CX3CL1 we observed a synergistic effect of IFNγ and TNFα in combination. CCL20, CXCL1, CXCL6, and IL8 were negatively regulated by IFNγ. CONCLUSIONS: RPE cells responded to exposure to T cell-derived cytokines by upregulating expression of multiple chemokines related to microglial, T cell, and monocyte chemotaxis and activation. This inflammatory stress response may have implications for immune homeostasis in the retina, and for the further understanding of inflammatory ocular diseases such as uveitis and age-related macular degeneration.
Helene B Juel; Carsten Faber; Maja S Udsen; Lasse Folkersen; Mogens H Nissen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-13
Journal Detail:
Title:  Investigative ophthalmology & visual science     Volume:  -     ISSN:  1552-5783     ISO Abbreviation:  Invest. Ophthalmol. Vis. Sci.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703701     Medline TA:  Invest Ophthalmol Vis Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of International Health, Immunology and Microbiology, University of Copenhagen, Eye Research Unit, Copenhagen, Denmark.
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