Abstract:
:Co-infection with virus and bacteria happens frequently and often results in an exacerbated clinical course of the disease, possibly due to mechanisms including altered cytokine production. In the present study, the authors investigated the combined effects of avirulent Semliki Forest virus (SFV-A7) and bacterial lipopolysaccharide (LPS) on the interleukin-1 beta (IL-1 beta) and IL-2 gene expression in murine splenic cells. The authors found that 10 ng/ml of LPS in the culture medium induced expression of IL-1 beta but not IL-2, while infection with SFV-A7 did not induce either of these two cytokines. However, when SFV-A7 and LPS were applied together, a synergistic increase of both IL-1 beta and IL-2 was observed. Further experiments showed that addition of SFV-A7 3 h before LPS enhanced, whereas addition of the virus 3 h after the LPS inhibited, IL-1 beta gene expression. These results indicate that an interaction of virus and Gram-negative bacteria can result in an altered cytokine gene expression.
journal_name
Scand J Immunoljournal_title
Scandinavian journal of immunologyauthors
Yang J,Hukkanen V,Seljelid R,Salmi AAdoi
10.1046/j.1365-3083.1997.d01-406.xsubject
Has Abstractpub_date
1997-04-01 00:00:00pages
349-53issue
4eissn
0300-9475issn
1365-3083journal_volume
45pub_type
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