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Author Gérard, Hervé C. ♦ Köhler, L. ♦ Branigan, Patrick J. ♦ Zeidler, Henning ♦ Schumacher, H. Ralph ♦ Hudson, Alan P.
Source SpringerLink
Content type Text
Publisher Springer-Verlag
File Format PDF
Copyright Year ©1998
Language English
Subject Domain (in DDC) Social sciences ♦ Sociology & anthropology
Abstract The principal host cell for persistently infecting synovial Chlamydia trachomatis is the macrophage. During infection of human monocytes/macrophages in culture this bacterium displays aberrant morphology and produces no new elementary bodies, reflecting the situation in synovium. Here we investigate the metabolic status of C. trachomatis (serovar K) during an extended infection of human peripheral monocytes in vitro. Using reverse transcription-polymerase chain reaction assays, we have shown that primary transcripts from the chlamydial rRNA operons are present throughout a 10-day course of infection. Other assays targeting mRNAs from chlamydial genes encoding r-proteins S5 and L5, the glycyl-tRNA synthetase, the 60-kDa cysteine-rich outer membrane protein, and the KDO transferase indicate that these messengers are also present throughout the entire 10-day period. The gene encoding the 57-kDa heat-shock protein (hsp60) is expressed by the bacterium throughout the 10-day infection of cultured monocytes, but transcript levels from the gene encoding the major outer membrane protein (omp1) appear to be attenuated. Western analyses targeting these latter proteins confirm the presence of the hsp60 gene product, and the virtual absence of major outer membrane protein, in chlamydia-infected cultured human monocytes. Thus, during extended infection of human monocytes in vitro, chlamydia are non-productive but transcriptionally active; the pattern of transcriptional activity reflects that known for persistent C. trachomatis infection in vivo in synovial tissue.
ISSN 03008584
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1998-10-16
Publisher Place Berlin/Heidelberg
e-ISSN 14321831
Journal Medical Microbiology and Immunology
Volume Number 187
Issue Number 2
Page Count 6
Starting Page 115
Ending Page 120


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Source: SpringerLink