Pentoxifylline promotes replication of human cytomegalovirus in vivo and in vitro

被引:30
作者
Staak, K
Prosch, S
Stein, J
Priemer, C
Ewert, R
Docke, WD
Kruger, DH
Volk, HD
Reinke, P
机构
[1] HUMBOLDT UNIV BERLIN,FAC MED CHARITE,INST MED IMMUNOL,D-10089 BERLIN,GERMANY
[2] HUMBOLDT UNIV BERLIN,INST MED VIROL,MED CLIN NEPHROL 5,BERLIN,GERMANY
关键词
D O I
10.1182/blood.V89.10.3682.3682_3682_3690
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
OKT3 monoclonal antibody (MoAb) therapy is well established in the prevention and therapy of acute rejection in transplant patients, Unfortunately, this therapy is associated with several short-term (cytokine release syndrome) and long-term (infections, EBV-related lymphoma) side effects, Recently, we were able to demonstrate an association between the TNF alpha release following the first OKT3 MoAb infusions and the appearance of human cytomegalovirus (HCMV) reactivation several days later. In order to prevent this TNF alpha associated HCMV reactivation patients were additionally treated with pentoxifylline (PTX), a methylxanthine derivative that has been shown to suppress TNF alpha induction, Although the TNF alpha peak plasma level following OKT3 MoAb treatment was markedly reduced, the incidence of HCMV reactivation and HCMV disease was not influenced. In transient transfection experiments using HCMV immediate early enhancer/promoter CAT reporter gene constructs PTX enhanced the promoter activity independently from TNF alpha in premonocytic cells, Furthermore, PTX acted synergistically with TNF alpha. In virus-infected human embryonal lung fibro blasts HCMV replication was triggered in the presence of both PTX and TNF alpha, while either substance alone had only marginal effects. The stimulatory effect of PTX on the immediate early (IE) enhancer/promoter was mediated via CREB/ATF, a eukaryotic transcription factor that binds to the 19 bp sequence motif in the enhancer region, while TNF alpha stimulation was mediated by activation of the transcription factor NF-kB and its binding to the 18 bp sequence motif in the enhancer. These data suggest a potential side effect of cAMP-elevating drugs such as PTX, (C) 1997 by The American Society of Hematology.
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页码:3682 / 3690
页数:9
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