Abstract:
:Radiation exposure results in an inflammatory reaction with acute as well as subacute consequences. Leukocyte infiltration is one of the predominant early histological changes and involves both cytokines and adhesion molecules. Endothelial cells play a key role in this reaction. We have previously shown the increased production of interleukin 6 (IL-6) and IL-8 and the upregulation in intercellular adhesion molecule 1 (ICAM-1) expression by HUVEC following gamma ray exposure. In the present study, we used the cytokines IL-4 and IL-10 to regulate these radiation-induced manifestations. Human umbilical vascular endothelial cells (HUVEC) were treated with IL-4 and IL-10 (50 pg/ml) either before or after 10- Gy irradiation. Three and seven days after irradiation, IL-6 and IL-8 production by HUVEC (either treated or non-treated) was assessed by enzyme-linked immunosorbent assay (ELISA). Our results show that IL-4, when added after irradiation, reversed the radiation-induced increase in IL-8 production, although slightly increased IL-6 production. IL-10 decreased both IL-8 and IL-6 production when added after irradiation. ICAM-1 expression was evaluated 3 days after irradiation by flow cytometry. The radiation-induced upregulation in ICAM-1 expression remained unaffected by the use of IL-4. Altogether, our results show that radiation-induced endothelial cell activation may be ameliorated by IL-4 and/or IL-10, which is of significance in designing strategies for cytokine-mediated intervention and/or therapy of radiation damage.
journal_name
Cytokinejournal_title
Cytokineauthors
Van Der Meeren A,Squiban C,Gourmelon P,Lafont H,Gaugler MHdoi
10.1006/cyto.1999.0497keywords:
subject
Has Abstractpub_date
1999-11-01 00:00:00pages
831-8issue
11eissn
1043-4666issn
1096-0023pii
S1043-4666(99)90497-0journal_volume
11pub_type
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