High-dose hydrocortisone reduces expression of the pro-inflammatory chemokines CXCL8 and CXCL10 in SARS coronavirus-infected intestinal cells.

Abstract:

:Clinical observations and our high-density oligonucleotide microarray results demonstrated increased expression of proinflammatory chemokines after SARS-CoV infection. Here, we investigated the influence of SARS-CoV infection on CXCL8 (interleukin 8) and CXCL10 (interferon-gamma-inducible protein 10) in human intestinal epithelial (Caco2) cells. RT-PCR and ELISA showed time-dependent up-regulation of both chemokines after SARS-CoV infection. Electric mobility shift assay revealed increased DNA binding activity of the cellular transcription factors activator protein 1 (AP-1) and nuclear factor (B (NF-kappaB) in SARS-CoV infected cells. High hydrocortisone concentrations (> or =50 microg/ml) completely prevented increased DNA binding activity of AP-1 and NF-kappaB and inhibited up-regulation of CXCL8 and CXCL10, but did not reduce chemokine expression to basal levels. Ribavirin that does not inhibit SARS-CoV replication in Vero cells inhibited SARS-CoV replication in Caco2 cells at therapeutical concentrations. Hydrocortisone neither influenced SARS-CoV titres alone nor in combination with ribavirin. Our results show that corticosteroids may be of limited benefit in the suppression of chemokine production by SARS-CoV-infected cells.

journal_name

Int J Mol Med

authors

Cinatl J Jr,Michaelis M,Morgenstern B,Doerr HW

subject

Has Abstract

pub_date

2005-02-01 00:00:00

pages

323-7

issue

2

eissn

1107-3756

issn

1791-244X

journal_volume

15

pub_type

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