Chronic wasting disease (CWD), the prion disease in cervids (deer and elk), is widespread in North America. The cervid population is huge (approximately 22 million) and venison consumption very significant in USA. The fast spreading CWD is hard to contain, and it may pose a serious threat to human health if it is transmissible to humans, even at a low rate. This proposal will use transgenic (Tg) mouse models to answer three critical questions pertinent to the potential dangers posed by CWD to humans: Can CWD be transmitted to humans directly (Aim 1)? Can CWD be transmitted to humans after passage through secondary hosts (cattle or sheep) (Aim 2)? Has CWD transmission to humans already occurred (Aim 3)? The ultimate goals are to define the risks of direct and indirect CWD transmission to humans and to establish a surveillance program to monitor for human subjects infected by CWD prions. Research Design:
For Aims 1 and 2, humanized and cervidized Tg mice will be intracerebrally (i.e.) inoculated with brain homogenates either from human subjects with sporadic Creutzfeldt-Jakob disease (CJD) or from CWD-affected animals including: Rocky Mountain elk, mule deer, white-tail deer, cattle, and sheep; sheep scrapie will also be inoculated as a control. The inoculated animals will then be monitored and compared for the transmission rate, incubation time, neurological symptoms, accumulation and distribution of PrP-Sc, and the glycoforms and conformational stability of PrP-Sc before and after passage in the Tg mice. Secondary transmissions will be done to examine for asymptomatic carriers of prion infectivity. Oral transmissions will be performed for CWD isolates that demonstrated infectivity in humanized Tg mice after i.e. inoculation.
For Aim 3, cervidized Tg mice will be i.e. inoculated with brain homogenates from CJD subjects who had consumed venison from CWD endemic areas as well as from sporadic CJD subjects not exposed to CWD. The prion infectivity liters in the brain homogenates will be determined for all involved CJD subjects, and the same infectivity dose will be used for inoculation. A statistically significant higher transmission efficiency of prions from """"""""CWD-exposed"""""""" CJD subjects than that of the sporadic CJD subjects unexposed to CWD will suggest that the """"""""CWD-exposed"""""""" subject likely acquired his CJD from CWD. ? ? ?

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS052319-02
Application #
7232665
Study Section
Clinical Neuroimmunology and Brain Tumors Study Section (CNBT)
Program Officer
Wong, May
Project Start
2006-06-01
Project End
2011-05-31
Budget Start
2007-06-01
Budget End
2008-05-31
Support Year
2
Fiscal Year
2007
Total Cost
$337,544
Indirect Cost
Name
Case Western Reserve University
Department
Pathology
Type
Schools of Medicine
DUNS #
077758407
City
Cleveland
State
OH
Country
United States
Zip Code
44106
Choi, Jin-Kyu; Cali, Ignazio; Surewicz, Krystyna et al. (2016) Amyloid fibrils from the N-terminal prion protein fragment are infectious. Proc Natl Acad Sci U S A 113:13851-13856
Zhan, Yi-An; Abskharon, Romany; Li, Yu et al. (2016) Quiescin-sulfhydryl oxidase inhibits prion formation in vitro. Aging (Albany NY) 8:3419-3429
Nichols, Tracy A; Spraker, Terry R; Gidlewski, Thomas et al. (2016) Dietary magnesium and copper affect survival time and neuroinflammation in chronic wasting disease. Prion 10:228-50
Kurt, Timothy D; Jiang, Lin; Fernández-Borges, Natalia et al. (2015) Human prion protein sequence elements impede cross-species chronic wasting disease transmission. J Clin Invest 125:2548
Xiao, Xiangzhu; Yuan, Jue; Qing, Liuting et al. (2014) Comparative Study of Prions in Iatrogenic and Sporadic Creutzfeldt-Jakob Disease. J Clin Cell Immunol 5:
Kong, Qingzhong; Mills, Jeffrey L; Kundu, Bishwajit et al. (2013) Thermodynamic stabilization of the folded domain of prion protein inhibits prion infection in vivo. Cell Rep 4:248-54
Liang, Jingjing; Wang, Wei; Sorensen, Debra et al. (2012) Cellular prion protein regulates its own ?-cleavage through ADAM8 in skeletal muscle. J Biol Chem 287:16510-20
Li, Baiya; Qing, Liuting; Yan, Jianqun et al. (2011) Instability of the octarepeat region of the human prion protein gene. PLoS One 6:e26635
Zou, Wen-Quan; Langeveld, Jan; Xiao, Xiangzhu et al. (2010) PrP conformational transitions alter species preference of a PrP-specific antibody. J Biol Chem 285:13874-84
Liang, Jingjing; Parchaliuk, Debra; Medina, Sarah et al. (2009) Activation of p53-regulated pro-apoptotic signaling pathways in PrP-mediated myopathy. BMC Genomics 10:201

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