These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Stimulation of the human cytomegalovirus IE enhancer/promoter in HL-60 cells by TNFalpha is mediated via induction of NF-kappaB.
    Author: Prösch S, Staak K, Stein J, Liebenthal C, Stamminger T, Volk HD, Krüger DH.
    Journal: Virology; 1995 Apr 01; 208(1):197-206. PubMed ID: 11831701.
    Abstract:
    TNFalpha enhances the basal activity of the major Immediate Early (IE) enhancer/promoter of human cytomegalovirus (HCMV) in the immature premonocytic HL-60 cell line. The stimulatory effect of TNFalpha is mediated by induction of the transcription factor NF-kappaB, which specifically binds to the 18-bp repetitive sequence motif of the enhancer region. Complex formation could be competed by oligonucleotides representing the 18-bp sequence motif or the prototype NF-kappaB sequence of the immunoglobulin kappa gene. In gel mobility shift assays antisera specific to NF-kappaB p50 and p65 subunits were shown to react with the DNA-protein complex. Addition of the antioxidant PDTC blocked TNFalpha-mediated stimulation in a dose dependent manner. Electrophoretic mobility shift assays indicated that PDTC prevents NF-kappaB induction. Furthermore, it is suggested that protein kinases like PK-C are involved in the TNFalpha signal transduction pathway which leads to the activation of NF-kappaB and its binding to the HCMV IE enhancer in HL-60 cells. Our data are consistent with a role of TNFalpha in reactivation of latent HCMV infection in premonocytic cells.
    [Abstract] [Full Text] [Related] [New Search]