title: Up-regulation of host cell genes during interferon-gamma-induced persistent Chlamydia pneumoniae infection in HL cells.
abstract: As a step toward understanding the role played by host gene expression in the development and pathogenesis of persistent Chlamydia pneumoniae infection, modulation of the host-cell transcriptional response during interferon (IFN)- gamma -induced persistent C. pneumoniae infection of HL cells was examined by a cDNA array and then selectively by a real-time quantitative reverse transcription-polymerase chain reaction. We identified 9 host cell genes whose transcription was consistently altered during IFN- gamma -induced persistent C. pneumoniae infection. The strongest up-regulation of persistent infection, compared with controls (active infection and IFN- gamma ) was identified for insulin-like growth factor-binding protein 6, IFN-stimulated protein 15 kDa, cyclin D1, and interleukin-7 receptor genes. These results suggest that, during persistent infection, C. pneumoniae reprograms the host transcriptional machinery that regulates a variety of cellular processes, including adhesion, regulation of the cell cycle, growth, and inflammatory response, all of which might play important roles in the pathogenesis of persistent C. pneumoniae infection.
authors.affiliation: Haartman Institute, Department of Virology, University of Helsinki, Helsinki, Finland. laura.mannonen@helsinki.fi
authors.forename: Laura
authors.initials: L
authors.lastname: Mannonen
authors.forename: Tuomas
authors.initials: T
authors.lastname: Nikula
authors.forename: Anu
authors.initials: A
authors.lastname: Haveri
authors.forename: Arja
authors.initials: A
authors.lastname: Reinikainen
authors.forename: Jenni M
authors.initials: JM
authors.lastname: Vuola
authors.forename: Riitta
authors.initials: R
authors.lastname: Lahesmaa
authors.forename: Mirja
authors.initials: M
authors.lastname: Puolakkainen
mesh_terms: D002478:Cells, Cultured; D002690:Chlamydia Infections / Q000276:immunology* / Q000382:microbiology; D016993:Chlamydophila pneumoniae / Q000254:growth & development / Q000472:pathogenicity*; D004847:Epithelial Cells / Q000382:microbiology*; D005786:Gene Expression Regulation; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology*; D020411:Oligonucleotide Array Sequence Analysis; D011506:Proteins / Q000235:genetics / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015854:Up-Regulation
chemical_list: D011506:Proteins; D007371:Interferon-gamma