Journal
JOURNAL OF MICROBIOLOGICAL METHODS
Volume 63, Issue 3, Pages 248-253Publisher
ELSEVIER
DOI: 10.1016/j.mimet.2005.03.011
Keywords
Chlamydophila pneumoniae; MIF; ELISA; HSP10; atherosclerosis
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In this study the prevalence of antibodies against the heat shock protein 10 (HSP10) of Chamydophila pneumoniae (CP) (as assessed by ELISA) in patients with coronary heart disease (CHD) and seropositive or seronegative to CP, as assessed by microimmunofluorescence (MIF), was investigated. The controls were age- and sex-matched healthy subjects. The HSP10 preparation used throughout this study was a 6-his-tagged recombinant protein preliminarily shown to be immunogenic in mice. Low level IgG reactivity against CP-HSP10 was detected in 19 out of 200 and 5 out of 100 CHD patients and controls, respectively. No IgM or IgA isotypes were found. Furthermore, there was no difference in the frequency or level of anti-HSP10 IgG between CP-positive and CP-negative sera either in patients (11/140=7.9% vs. 8/60=13%) or in healthy subjects (3/40=7.5% vs. 2/60=3.3%). Overall, our data indicate that CP-HSP10, at variance with CP-HSP60, to which it is genetically and physiologically linked, should not be regarded as a major expressed immunogen or a marker of infection by CP in CHD patients. (c) 2005 Elsevier B.V. All rights reserved.
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