Pathogenesis of chronic wasting disease in cervidized transgenic mice

Davis M. Seelig, Gary L. Mason, Glenn C. Telling, Edward A. Hoover

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Chronic wasting disease (CWD) is a fatal, endemic prion disease of wild and captive cervids, including deer, elk, and moose. Typical of prion diseases, CWD is characterized by the conversion of the native, protease-sensitive protein PrPC to a protease-resistant isoform, denoted as PrPRES. Here we have studied the expression of cervid PrPC and the pathogenesis of CWD infection in transgenic mice expressing the normal cervid prion protein (Tg[CerPrP] mice). Using tissue-based in situ immunohistochemistry protocols, we first identified cervid PrPC expression in the lymphoid, nervous, hemopoietic, endocrine, and certain epithelial tissues of Tg[CerPrP] mice. Tg[Cer-PrP] mice were then inoculated with CWD via one of four routes (intracerebral, intravenous, intraperitoneal, or oral); all groups developed spongiform encephalopathy, although the oral route required a larger infecting dose. Incubation periods were 184 ± 13, 218 ± 15, 200 ± 7, and 350 ± 27 days after inoculation, respectively. In longitudinal studies, we tracked the appearance of PrPRES in the brain, spleen, Peyer's patches, lymph nodes, pancreatic islets of Langerhans, bone marrow, and salivary glands of preclinical and terminal mice. In addition, we documented horizontal transmission of CWD from inoculated mice and to un-inoculated cohabitant cage-mates. This work documents the multiroute susceptibility, pathogenesis, and lateral transmission of CWD infection in Tg[CerPrP] mice, affirming this model as a robust system to study this cervid transmissible spongiform encephalopathy.

Original languageEnglish (US)
Pages (from-to)2785-2797
Number of pages13
JournalAmerican Journal of Pathology
Volume176
Issue number6
DOIs
StatePublished - Jun 2010

Fingerprint

Chronic Wasting Disease
Transgenic Mice
Prion Diseases
Islets of Langerhans
PrPC Proteins
Peptide Hydrolases
Endemic Diseases
Peyer's Patches
Deer
Brain Diseases
Infection
Salivary Glands
Longitudinal Studies
Protein Isoforms
Spleen
Epithelium
Lymph Nodes
Bone Marrow
Immunohistochemistry
Brain

Cite this

Pathogenesis of chronic wasting disease in cervidized transgenic mice. / Seelig, Davis M.; Mason, Gary L.; Telling, Glenn C.; Hoover, Edward A.

In: American Journal of Pathology, Vol. 176, No. 6, 06.2010, p. 2785-2797.

Research output: Contribution to journalArticle

Seelig, Davis M. ; Mason, Gary L. ; Telling, Glenn C. ; Hoover, Edward A. / Pathogenesis of chronic wasting disease in cervidized transgenic mice. In: American Journal of Pathology. 2010 ; Vol. 176, No. 6. pp. 2785-2797.
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