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Microbiology 155 (2009), 2641-2651; DOI  10.1099/mic.0.029918-0IMMEDIATE OPEN ACCESS ARTICLE
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Microbiology 155 (2009), 2641-2651; DOI  10.1099/mic.0.029918-0
© 2009 Society for General Microbiology

Identification of conserved antigens for early serodiagnosis of relapsing fever Borrelia

Job E. Lopez1, Stephen F. Porcella2, Merry E. Schrumpf1, Sandra J. Raffel1, Carl H. Hammer3, Ming Zhao3, Mary Ann Robinson3 and Tom G. Schwan1

1 Laboratory of Zoonotic Pathogens, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840, USA
2 Research Technologies Section, Research Technologies Branch, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840, USA
3 Research Technologies Section, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852-1737, USA

Borrelia hermsii is a blood-borne pathogen transmitted by the argasid tick Ornithodoros hermsi. Since spirochaete clearance in mice is associated with an IgM-mediated response, an immunoproteomic analysis was used to identify proteins reactive with IgM. We report that IgM from both mice and human patients infected with B. hermsii not only reacted with the previously identified variable membrane proteins but also identified candidate antigens including heat-shock proteins, an adhesin protein, ABC transporter proteins, flagellar proteins, housekeeping proteins, an immune evasion protein, and proteins with unknown function. Furthermore, IgM reactivity to recombinant glycerophosphodiester phosphodiesterase was detected during early spirochaete infection and prior to a detectable IgG response. Lastly, a conserved hypothetical protein was produced in Escherichia coli and tested with immune serum against B. hermsii and Borrelia recurrentis. These results identify a much larger set of immunoreactive proteins, and could help in the early serodiagnosis of this tick-borne infection.

CorrespondenceJob Lopez
lopezjob{at}niaid.nih.gov

Abbreviations: GlpQ, glycerophosphodiester phosphodiesterase; rGlpQ, recombinant glycerophosphodiester phosphodiesterase

The GenBank/EMBL/DDBJ accession numbers for the nucleotide sequences for the genes located on B. hermsii plasmids, and whose sequences have not previously been deposited in the GenBank database, are FJ446702 (oppAIV) and FJ446703 (hypothetical protein).






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Copyright © 2009 Society for General Microbiology.