title: A host-restricted viral vector for antigen-specific immunization against Lyme disease pathogen.
abstract: Newcastle disease virus (NDV) is an avian virus that is attenuated in primates and is a potential vaccine vector for human use. We evaluated NDV as a vector for expressing selected antigens of the Lyme disease pathogen Borrelia burgdorferi. A series of recombinant NDVs were generated that expressed intracellular or extracellular forms of two B. burgdorferi antigens: namely, the basic membrane protein A (BmpA) and the outer surface protein C (OspC). Expression of the intracellular and extracellular forms of these antigens was confirmed in cultured chicken cells. C3H or Balb/C mice that were immunized intranasally with the NDV vectors mounted vigorous serum antibody responses against the NDV vector, but failed to mount a robust response against either the intracellular or extracellular forms of BmpA or OspC. By contrast, a single immunization of hamsters with the NDV vectors via the intranasal, intramuscular, or intraperitoneal route resulted in rapid and rigorous antibody responses against the intracellular or extracellular forms of BmpA and OspC. When groups of hamsters were separately inoculated with various NDV vectors and challenged with B. burgdorferi (10(8)cells/animal), immunization with vector expressing either intracellular or extracellular BmpA was associated with a significant reduction of the pathogen load in the joints. Taken together, our studies highlighted the importance of NDV as vaccine vector that can be used for simple yet effective immunization of hosts against bacterial infections including Lyme disease.
authors: Department of Veterinary Medicine, University of Maryland, College Park, MD 20742, USA.
authors: Sa
authors: S
authors: Xiao
authors: Manish
authors: M
authors: Kumar
authors: Xiuli
authors: X
authors: Yang
authors: Mustafa
authors: M
authors: Akkoyunlu
authors: Peter L
authors: PL
authors: Collins
authors: Siba K
authors: SK
authors: Samal
authors: Utpal
authors: U
authors: Pal
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