Lyme disease is a multisystem, tick-borne chronic infection caused by the persistence of the spirochete Borrelia burgdorferi. B. burgdorferi has the ability to proliferate in a variety of niches in reservoir and human hosts as well as in the vector lxodes scapularis. Preliminary evidence indicates that differential gene expression resulting from environmental stimuli in one of the mechanisms that allows bacterial to adapt rapidly to fast changing environments found during infection and disease of vectors and hosts. We and others have described a family of chromosomal genes (bmpA-D) encoding homologous 36.9-39.8 kDa lipoproteins of the p39 family. The tandem chromosomal location of the bmp genes, their homology and overlapping regulatory signals together with the potential surface location of the proteins they encode in addition to their apparent up regulation by environmental stimuli suggests the hypothesis that these proteins may be important for B. burgdorferi survival in different environments. In this project, we propose to study the effects environmental stimuli have on bmpC, a member of this gene family first described by us, both in vitro and in vivo in mice and ticks, in an effort to improve our understanding of the mechanisms employed by B. burgdorferi to enable it to persist and thrive in vectors and hosts. The long-range goal of our efforts is to improve understanding of B. burgdorferi gene expression despite the lack of genetic systems that would facilitate this work.
The specific aims of the current project are: 1) identify anti-BmpC Mab and polyclonal antibodies not cross-reactive with BmpD, BmpA and BmpB and use them to characterize BmpC protein and confirm its localization and lipidation in B. burgdorferi 297; 2) Determine levels of expression and mechanisms of regulation of bmpC under different in vitro and in vivo conditions; and 3) Determine genetic organization and DNA structural and regulatory sequences of bmpC in B. burgdorferi, B. afzelii and B. garinii genospecies and in B. burgdorferi 297 grown under different conditions in vitro and in vivo. The latter studies will indicate whether different levels of transcription are secondary to changes in the regulatory and structural DNA sequences of the bmpC gene.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
1R01AI043063-01
Application #
2638164
Study Section
Special Emphasis Panel (ZRG5-BM-2 (01))
Project Start
1998-07-01
Project End
2002-06-30
Budget Start
1998-07-01
Budget End
1999-06-30
Support Year
1
Fiscal Year
1998
Total Cost
Indirect Cost
Name
New York Medical College
Department
Microbiology/Immun/Virology
Type
Schools of Medicine
DUNS #
City
Valhalla
State
NY
Country
United States
Zip Code
10595
Bugrysheva, Julia V; Godfrey, Henry P; Schwartz, Ira et al. (2011) Patterns and regulation of ribosomal RNA transcription in Borrelia burgdorferi. BMC Microbiol 11:17
Bryksin, Anton V; Tomova, Alexandra; Godfrey, Henry P et al. (2010) BmpA is a surface-exposed outer-membrane protein of Borrelia burgdorferi. FEMS Microbiol Lett 309:77-83
Cabello, Felipe C; Godfrey, Henry P; Newman, Stuart A (2007) Hidden in plain sight: Borrelia burgdorferi and the extracellular matrix. Trends Microbiol 15:350-4
Morozova, Olga V; Dubytska, Lydia P; Ivanova, Larisa B et al. (2005) Genetic and physiological characterization of 23S rRNA and ftsJ mutants of Borrelia burgdorferi isolated by mariner transposition. Gene 357:63-72
Bryksin, Anton V; Godfrey, Henry P; Carbonaro, Carol A et al. (2005) Borrelia burgdorferi BmpA, BmpB, and BmpD proteins are expressed in human infection and contribute to P39 immunoblot reactivity in patients with Lyme disease. Clin Diagn Lab Immunol 12:935-40
Morozova, O V; Cabello, F C; Dobrotvorsky, A K (2004) Semi-nested PCR detection of Bartonella henselae in Ixodes persulcatus ticks from Western Siberia, Russia. Vector Borne Zoonotic Dis 4:306-9
Morozova, Olga V; Dobrotvorsky, Andrey K; Livanova, Natalya N et al. (2002) PCR detection of Borrelia burgdorferi sensu lato, tick-borne encephalitis virus, and the human granulocytic ehrlichiosis agent in Ixodes persulcatus ticks from Western Siberia, Russia. J Clin Microbiol 40:3802-4
Bugrysheva, Julia; Dobrikova, Elena Y; Godfrey, Henry P et al. (2002) Modulation of Borrelia burgdorferi stringent response and gene expression during extracellular growth with tick cells. Infect Immun 70:3061-7
Dobrikova, E Y; Bugrysheva, J; Cabello, F C (2001) Two independent transcriptional units control the complex and simultaneous expression of the bmp paralogous chromosomal gene family in Borrelia burgdorferi. Mol Microbiol 39:370-8
Gorbacheva, V Y; Godfrey, H P; Cabello, F C (2000) Analysis of the bmp gene family in Borrelia burgdorferi sensu lato. J Bacteriol 182:2037-42

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