Nearly ubiquitous tissue distribution of the scrapie agent precursor protein.

Abstract:

:The "modified host protein" model of scrapie proposes that the transmissible agent is composed of the degradation-resistant protein, Sp33-37, and that clinical and pathologic signs result from neurotoxic accumulations of this protein. Sp33-37 is an abnormal, amyloidogenic isoform of the normally occurring cellular protein Cp33-37. This study investigated the tissue distribution of Cp33-37 in hamster. In brain, Cp33-37 was most concentrated in the hippocampal formation. Immunohistochemical studies localized Cp33-37 to neurons and surrounding neuropil in hippocampus; septal, caudate, and thalamic nuclei; dorsal root ganglia cells; and large-diameter dorsal root axons. In non-neuronal hamster tissues, Cp33-37 was detected in circulating leukocytes, heart, skeletal muscle, lung, intestinal tract, spleen, testis, ovary, and some other organs. The presence of Cp33-37 in extracerebral tissues indicates that its function is not unique to brain. These results indicate that the molecular substrate for the production of Sp33-37, the scrapie agent, and scrapie amyloid is present in a variety of cerebral and extracerebral sites.

journal_name

Neurology

journal_title

Neurology

authors

Bendheim PE,Brown HR,Rudelli RD,Scala LJ,Goller NL,Wen GY,Kascsak RJ,Cashman NR,Bolton DC

doi

10.1212/wnl.42.1.149

subject

Has Abstract

pub_date

1992-01-01 00:00:00

pages

149-56

issue

1

eissn

0028-3878

issn

1526-632X

journal_volume

42

pub_type

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