Ryan Taschuk1,3 Kristen Marciniuk,1,2 Suresh Tikoo,1,3 Philip Griebel,1
Andrew Potter,1 Neil Cashman5 and Scott Napper1,2
1University of Saskatchewan; VIDO-lnterVac; Saskatoon, SK Canada;
2Department of Biochemistry; University of Saskatchewan; Saskatoon, SK Canada;
3School of Public Health; University of Saskatchewan; Saskatoon, SK Canada;
4Brain Research Centre; University of British Columbia; Vancouver, BC Canada;
5Brain Research Center; University of British Columbia; Vancouver, BC Canada
The prion protein is well conserved across mammals, and the misfolded
protein is the causative agent in many animal-specific prion diseases, including
chronic wasting disease (CWD) in deer and elk. Prion diseases are caused by
misfolding of endogenously expressed prion protein from the native and
homeostatic Prpc conformation to the infectious and pathogenic PrPsc
conformation. Transmissible spongiform encephalopathies are of great interest
for many reasons: the onset of disease inevitably leads to neurodegeneration and
death, the potential of interference with food production through transmission
both within and between agricultural species can have severe economic impacts,
and the potential exists for zoonotic transmission. Our group has hypothesized
that immunotherapeutic targeting of the PrPSc conformation would clear the
infectious agent / infected cell while sparing native PrP, and vaccines may have
potential application in prevention of CWD transmission or therapeutic treatment
of disease.
Our research has focused upon identifying and optimizing three components
of a potential CWD vaccine: a CWD-disease specific epitope (DSE) that induces
antibody responses, a carrier protein to increase the magnitude and duration of
antibody responses toward DSEs, and identification of delivery systems for oral
delivery of the above DSE-carrier protein ro cervids. We have developed and
optimized DSEs from three distinct regions of PrPc. Vaccination trials using
iterations of these DSEs elicit high titers of epitope-specific serum antibody.
A second generation carrier protein has increased both the duration and
magnitude of antibody responses when compared with our previous carrier protein.
Lastly, two delivery systems were effective in inducing antibody responses when
administered orally to white-tailed deer. We have identified the vaccine
components necessary for delivering a CWD vaccine to wild cervids. These
findings will direct our final CWD vaccine formulation and delivery system.
Thursday, August 08, 2013
Characterization of the first case of naturally occurring chronic wasting
disease in a captive red deer (Cervus elaphus) in North America
Friday, August 09, 2013
CWD TSE prion, plants, vegetables, and the potential for environmental
contamination
Tuesday, February 28, 2012
newly developed injectable CWD vaccine, live rectal mucosa testing and
Deer Game Farms Update
http://chronic-wasting-disease.blogspot.com/2012/02/newly-developed-injectable-cwd-vaccine.html
TSS
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