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New model for chronic wasting disease

Date:
May 27, 2010
Source:
American Journal of Pathology
Summary:
Scientists have generated a mouse model of cervid chronic wasting disease. Chronic wasting disease is a fatal prion-induced disease, similar to mad cow disease, that affects cervids such as deer, elk, and moose. It is a neurodegenerative disease typified by chronic weight-loss leading to death.

A group led by Dr. Edward Hoover at Colorado State University, Fort Collins, CO have generated a mouse model of cervid chronic wasting disease.

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They present these findings in the June 2010 issue of The American Journal of Pathology.

Chronic wasting disease is a fatal prion-induced disease, similar to mad cow disease, that affects cervids such as deer, elk, and moose. It is a neurodegenerative disease typified by chronic weight-loss leading to death. Prions are infectious agents composed primarily of proteins that are thought to be propagated by transmitting a mis-folded protein state. Due to the lack of an appropriate small animal model, little is known about cervid chronic wasting disease.

Using a mouse model of chronic wasting disease that expresses cervid prion protein (PrP), Seelig et al examined the susceptibility, pathogenesis, and transmission of cervid chronic wasting disease. They found that cervid PrPC (protease-sensitive PrP) was expressed in a number of different tissues, including lymphoid, nervous, hematopoietic, endocrine, and certain epithelial tissues, in this model. Additionally, disease could be transferred by various infectious methods, including injection into the brain, blood stream, and gut. It could also be transmitted orally, although the oral route required a larger infecting dose. Furthermore, this disease could be transferred between animals without experimental intervention to uninfected mice, highlighting the suitability of this system in studying cervid transmissible spongiform encephalopathy.

Dr. Hoover's group suggests that "cervidized transgenic mice substantially recapitulate the clinical, neuropathologic, and PrPRES tropism and transmission patterns reported in the native cervid species and [that] studies in Tg[CerPrP] mice can provide additional insights into the trafficking, shedding, and lateral transmission of [chronic wasting disease] prions."


Story Source:

The above story is based on materials provided by American Journal of Pathology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Seelig DM, Mason GL, Telling GC, Hoover EA. Pathogenesis of Chronic Wasting Disease in Cervidized Transgenic Mice. American Journal Of Pathology, 2010; DOI: 10.2353/ajpath.2010.090710

Cite This Page:

American Journal of Pathology. "New model for chronic wasting disease." ScienceDaily. ScienceDaily, 27 May 2010. <www.sciencedaily.com/releases/2010/05/100526103906.htm>.
American Journal of Pathology. (2010, May 27). New model for chronic wasting disease. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2010/05/100526103906.htm
American Journal of Pathology. "New model for chronic wasting disease." ScienceDaily. www.sciencedaily.com/releases/2010/05/100526103906.htm (accessed November 23, 2014).

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