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  1. Article ; Online: Review: Update on Classical and Atypical Scrapie in Sheep and Goats.

    Greenlee, Justin J

    Veterinary pathology

    2018  Volume 56, Issue 1, Page(s) 6–16

    Abstract: Scrapie is a naturally occurring transmissible spongiform encephalopathy (TSE) or prion disease of sheep and goats. Scrapie is a protein misfolding disease where the normal prion protein ( ... ...

    Abstract Scrapie is a naturally occurring transmissible spongiform encephalopathy (TSE) or prion disease of sheep and goats. Scrapie is a protein misfolding disease where the normal prion protein (PrP
    MeSH term(s) Animals ; Goat Diseases/genetics ; Goats ; Scrapie/genetics ; Scrapie/transmission ; Sheep
    Language English
    Publishing date 2018-09-10
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 188012-3
    ISSN 1544-2217 ; 0300-9858
    ISSN (online) 1544-2217
    ISSN 0300-9858
    DOI 10.1177/0300985818794247
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Short incubation periods of atypical H-type BSE in cattle with EK211 and KK211 prion protein genotypes after intracranial inoculation.

    Cassmann, Eric D / Frese, Alexis J / Becker, Kelsey A / Greenlee, Justin J

    Frontiers in veterinary science

    2023  Volume 10, Page(s) 1301998

    Abstract: In 2006, a case of atypical H-type BSE (H-BSE) was found to be associated with a germline mutation in ... ...

    Abstract In 2006, a case of atypical H-type BSE (H-BSE) was found to be associated with a germline mutation in the
    Language English
    Publishing date 2023-11-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2834243-4
    ISSN 2297-1769
    ISSN 2297-1769
    DOI 10.3389/fvets.2023.1301998
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Pathogenesis, detection, and control of scrapie in sheep.

    Cassmann, Eric D / Greenlee, Justin J

    American journal of veterinary research

    2020  Volume 81, Issue 7, Page(s) 600–614

    Abstract: In sheep, scrapie is a fatal neurologic disease that is caused by a misfolded protein called a prion (designated ... ...

    Abstract In sheep, scrapie is a fatal neurologic disease that is caused by a misfolded protein called a prion (designated PrP
    MeSH term(s) Animals ; Deer ; Genotype ; Scrapie ; Sheep
    Language English
    Publishing date 2020-07-01
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 390796-x
    ISSN 1943-5681 ; 0002-9645
    ISSN (online) 1943-5681
    ISSN 0002-9645
    DOI 10.2460/ajvr.81.7.600
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Review: Update on Classical and Atypical Scrapie in Sheep and Goats

    Greenlee, Justin J

    Veterinary pathology. 2019 Jan., v. 56, no. 1

    2019  

    Abstract: Scrapie is a naturally occurring transmissible spongiform encephalopathy (TSE) or prion disease of sheep and goats. Scrapie is a protein misfolding disease where the normal prion protein (PrPC) misfolds into a pathogenic form (PrPSc) that is highly ... ...

    Abstract Scrapie is a naturally occurring transmissible spongiform encephalopathy (TSE) or prion disease of sheep and goats. Scrapie is a protein misfolding disease where the normal prion protein (PrPC) misfolds into a pathogenic form (PrPSc) that is highly resistant to enzymatic breakdown within the cell and accumulates, eventually leading to neurodegeneration. The amino acid sequence of the prion protein and tissue distribution of PrPSc within affected hosts have a major role in determining susceptibility to and potential environmental contamination with the scrapie agent. Many countries have genotype-based eradication programs that emphasize using rams that express arginine at codon 171 in the prion protein, which is associated with resistance to the classical scrapie agent. In classical scrapie, accumulation of PrPSc within lymphoid and other tissues facilitates environmental contamination and spread of the disease within flocks. A major distinction can be made between classical scrapie strains that are readily spread within populations of susceptible sheep and goats and atypical (Nor-98) scrapie that has unique molecular and phenotype characteristics and is thought to occur spontaneously in older sheep or goats. This review provides an overview of classical and atypical scrapie with consideration of potential transmission of classical scrapie to other mammalian hosts.
    Keywords PrPSc proteins ; amino acid sequences ; animal pathology ; arginine ; disease transmission ; flocks ; goats ; hosts ; neurodegenerative diseases ; phenotype ; pollution ; protein folding ; rams ; scrapie ; tissue distribution ; tissues
    Language English
    Dates of publication 2019-01
    Size p. 6-16.
    Publishing place SAGE Publications
    Document type Article
    ZDB-ID 188012-3
    ISSN 1544-2217 ; 0300-9858
    ISSN (online) 1544-2217
    ISSN 0300-9858
    DOI 10.1177/0300985818794247
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Real-Time Quaking-Induced Conversion Detection of PrP

    Hwang, Soyoun / Greenlee, Justin J / Nicholson, Eric M

    Frontiers in veterinary science

    2021  Volume 8, Page(s) 643754

    Abstract: Chronic wasting disease (CWD) is a transmissible spongiform encephalopathy (TSE) that is fatal to free-range and captive cervids. CWD has been reported in the United States, Canada, South Korea, Norway, Finland, and Sweden, and the case numbers in both ... ...

    Abstract Chronic wasting disease (CWD) is a transmissible spongiform encephalopathy (TSE) that is fatal to free-range and captive cervids. CWD has been reported in the United States, Canada, South Korea, Norway, Finland, and Sweden, and the case numbers in both wild and farmed cervids are increasing rapidly. Studies indicate that lateral transmission of cervids likely occurs through the shedding of infectious prions in saliva, feces, urine, and blood into the environment. Therefore, the detection of CWD early in the incubation time is advantageous for disease management. In this study, we adapt real-time quacking-induced conversion (RT-QuIC) assays to detect the seeding activity of CWD prions in feces samples from clinical and preclinical white-tailed deer. By optimizing reaction conditions for temperature as well as the salt and salt concentration, prion seeding activity from both clinical and preclinical animals were detected by RT-QuIC. More specifically, all fecal samples collected from 6 to 30 months post inoculation showed seeding activity under the conditions of study. The combination of a highly sensitive detection tool paired with a sample type that may be collected non-invasively allows a useful tool to support CWD surveillance in wild and captive cervids.
    Language English
    Publishing date 2021-03-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2834243-4
    ISSN 2297-1769
    ISSN 2297-1769
    DOI 10.3389/fvets.2021.643754
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Combinatorial treatment of brain samples from sheep with scrapie using sodium percarbonate, sodium dodecyl sulfate, and proteinase K increases survival time in inoculated susceptible sheep.

    Harm, Tyler A / Smith, Jodi D / Cassmann, Eric D / Greenlee, Justin J

    Research in veterinary science

    2022  Volume 152, Page(s) 497–503

    Abstract: The agent of scrapie is resistant to most chemical and physical methods of inactivation. Prions bind to soils, metals, and various materials and persist in the environment confounding the control of prion diseases. Most methods of prion inactivation ... ...

    Abstract The agent of scrapie is resistant to most chemical and physical methods of inactivation. Prions bind to soils, metals, and various materials and persist in the environment confounding the control of prion diseases. Most methods of prion inactivation require severe conditions such as prolong exposure to sodium hypochlorite or autoclaving, which may not be suitable for field conditions. We evaluated the efficacy of a combinatorial approach to inactivation of US scrapie strain x124 under the mild conditions of treating scrapie-affected brain homogenate with sodium percarbonate (SPC), sodium dodecyl sulfate (SDS), or in combination followed by proteinase K (PK) digestion at room temperature. Western blot analysis of treated brain homogenate demonstrates partial reduction in PrP
    MeSH term(s) Animals ; Sheep ; Scrapie ; Endopeptidase K/metabolism ; PrPSc Proteins/analysis ; Sodium Dodecyl Sulfate/pharmacology ; Sodium Dodecyl Sulfate/metabolism ; Prions/metabolism ; Brain/metabolism ; Disease Susceptibility/veterinary ; Sheep Diseases/metabolism
    Chemical Substances Endopeptidase K (EC 3.4.21.64) ; PrPSc Proteins ; Sodium Dodecyl Sulfate (368GB5141J) ; sodium percarbonate (Z7G82NV92P) ; Prions
    Language English
    Publishing date 2022-09-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 840961-4
    ISSN 1532-2661 ; 0034-5288
    ISSN (online) 1532-2661
    ISSN 0034-5288
    DOI 10.1016/j.rvsc.2022.09.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Transmission of Raccoon-Passaged Chronic Wasting Disease Agent to White-Tailed Deer.

    Cassmann, Eric D / Frese, Alexis J / Moore, S Jo / Greenlee, Justin J

    Viruses

    2022  Volume 14, Issue 7

    Abstract: The transmission characteristics of prion diseases are influenced by host prion protein sequence and, therefore, the host species. Chronic wasting disease (CWD), a prion disease of cervids, has widespread geographical distribution throughout North ... ...

    Abstract The transmission characteristics of prion diseases are influenced by host prion protein sequence and, therefore, the host species. Chronic wasting disease (CWD), a prion disease of cervids, has widespread geographical distribution throughout North America and occurs in both wild and farmed populations. CWD prions contaminate the environment through scattered excrement and decomposing carcasses. Fresh carcasses with CWD prions are accessible by free-ranging mesopredators such as raccoons and may provide a route of exposure. Previous studies demonstrated the susceptibility of raccoons to CWD from white-tailed deer. In this study, we demonstrate that white-tailed deer replicate raccoon-passaged CWD prions which results in clinical disease similar to intraspecies CWD transmission. Six white-tailed deer were oronasally inoculated with brain homogenate from a raccoon with CWD. All six deer developed clinical disease, had widespread lymphoid distribution of misfolded CWD prions (PrP
    MeSH term(s) Animals ; Deer ; Prion Diseases ; Prions/metabolism ; Raccoons ; Wasting Disease, Chronic
    Chemical Substances Prions
    Language English
    Publishing date 2022-07-20
    Publishing country Switzerland
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v14071578
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Second passage of chronic wasting disease of mule deer to sheep by intracranial inoculation compared to classical scrapie.

    Cassmann, Eric D / Frese, Rylie D / Greenlee, Justin J

    Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc

    2021  Volume 33, Issue 4, Page(s) 711–720

    Abstract: The origin of chronic wasting disease (CWD) in cervids is unclear. One hypothesis suggests that CWD originated from scrapie in sheep. We compared the disease phenotype of sheep-adapted CWD to classical scrapie in sheep. We inoculated sheep intracranially ...

    Abstract The origin of chronic wasting disease (CWD) in cervids is unclear. One hypothesis suggests that CWD originated from scrapie in sheep. We compared the disease phenotype of sheep-adapted CWD to classical scrapie in sheep. We inoculated sheep intracranially with brain homogenate from first-passage mule deer CWD in sheep (sCWD
    MeSH term(s) Animals ; Blotting, Western/veterinary ; Brain ; Deer ; Genotype ; Prion Proteins/genetics ; Scrapie/genetics ; Scrapie/transmission ; Sheep ; Wasting Disease, Chronic/transmission
    Chemical Substances Prion Proteins
    Language English
    Publishing date 2021-05-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 287603-6
    ISSN 1943-4936 ; 1040-6387
    ISSN (online) 1943-4936
    ISSN 1040-6387
    DOI 10.1177/10406387211017615
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Experimental Oronasal Transmission of Chronic Wasting Disease Agent from White-Tailed Deer to Suffolk Sheep.

    Cassmann, Eric D / Moore, S Jo / Greenlee, Justin J

    Emerging infectious diseases

    2021  Volume 27, Issue 12, Page(s) 3156–3158

    Abstract: Chronic wasting disease (CWD) is a fatal prion disease of cervids. We examined host range of CWD by oronasally inoculating Suffolk sheep with brain homogenate from a CWD-positive white-tailed deer. Sixty months after inoculation, 1/7 sheep had ... ...

    Abstract Chronic wasting disease (CWD) is a fatal prion disease of cervids. We examined host range of CWD by oronasally inoculating Suffolk sheep with brain homogenate from a CWD-positive white-tailed deer. Sixty months after inoculation, 1/7 sheep had immunoreactivity against the misfolded form of prion protein in lymphoid tissue. Results were confirmed by mouse bioassay.
    MeSH term(s) Animals ; Deer ; Mice ; Prion Diseases ; Prions/genetics ; Sheep ; Wasting Disease, Chronic
    Chemical Substances Prions
    Language English
    Publishing date 2021-11-22
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1380686-5
    ISSN 1080-6059 ; 1080-6040
    ISSN (online) 1080-6059
    ISSN 1080-6040
    DOI 10.3201/eid2712.204978
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Disease phenotype of classical sheep scrapie is changed upon experimental passage through white-tailed deer.

    Kokemuller, Robyn D / Moore, S Jo / Bian, Jifeng / West Greenlee, M Heather / Greenlee, Justin J

    PLoS pathogens

    2023  Volume 19, Issue 12, Page(s) e1011815

    Abstract: Prion agents occur in strains that are encoded by the structure of the misfolded prion protein (PrPSc). Prion strains can influence disease phenotype and the potential for interspecies transmission. Little is known about the potential transmission of ... ...

    Abstract Prion agents occur in strains that are encoded by the structure of the misfolded prion protein (PrPSc). Prion strains can influence disease phenotype and the potential for interspecies transmission. Little is known about the potential transmission of prions between sheep and deer. Previously, the classical US scrapie isolate (No.13-7) had a 100% attack rate in white-tailed deer after oronasal challenge. The purpose of this study was to test the susceptibility of sheep to challenge with the scrapie agent after passage through white-tailed deer (WTD scrapie). Lambs of various prion protein genotypes were oronasally challenged with WTD scrapie. Sheep were euthanized and necropsied upon development of clinical signs or at the end of the experiment (72 months post-inoculation). Enzyme immunoassay, western blot, and immunohistochemistry demonstrated PrPSc in 4 of 10 sheep with the fastest incubation occurring in VRQ/VRQ sheep, which contrasts the original No.13-7 inoculum with a faster incubation in ARQ/ARQ sheep. Shorter incubation periods in VRQ/VRQ sheep than ARQ/ARQ sheep after passage through deer was suggestive of a phenotype change, so comparisons were made in ovinized mice and with sheep with known strains of classical sheep scrapie: No. 13-7 and x-124 (that has a more rapid incubation in VRQ/VRQ sheep). After mouse bioassay, the WTD scrapie and x-124 isolates have similar incubation periods and PrPSc conformational stability that are markedly different than the original No. 13-7 inoculum. Furthermore, brain tissues of sheep with WTD scrapie and x-124 scrapie have similar patterns of immunoreactivity that are distinct from sheep with No. 13-7 scrapie. Multiple lines of evidence suggest a phenotype switch when No. 13-7 scrapie prions are passaged through deer. This represents one example of interspecies transmission of prions resulting in the emergence or selection of new strain properties that could confound disease eradication and control efforts.
    MeSH term(s) Sheep ; Animals ; Mice ; Scrapie/metabolism ; Deer/metabolism ; Prion Proteins/genetics ; Prions/metabolism ; Genotype ; Phenotype
    Chemical Substances Prion Proteins ; Prions
    Language English
    Publishing date 2023-12-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2205412-1
    ISSN 1553-7374 ; 1553-7374
    ISSN (online) 1553-7374
    ISSN 1553-7374
    DOI 10.1371/journal.ppat.1011815
    Database MEDical Literature Analysis and Retrieval System OnLINE

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