Scrapie-associated precursor proteins: Antigenic relationship between species and immunocytochemical localization in normal, scrapie, and creutzfeldt- jakob disease brains

J. Safar, M. Ceroni, P. Piccardo, D. C. Gajdusek, Clarence J. Gibbs

Research output: Contribution to journalArticle

Abstract

We describe the antigenic properties and detection of a normal isoform of scrapie-associated precursor protein (PrP33-35C) in normal, and both normal and scrapie isoforms in scrapie- or Creutzfeldt-Jakob disease (CJD)-infected mouse, hamster, and human brains, using a variety of specific antibodies. Polyclonal antibodies raised against mouse and hamster PrP27-30 and against a synthetic peptide of the N-terminal sequence of this protein were used as immunologic probes. PrP27-30 purified as a primary immunogen corresponded to the lower molecular mass peptide, with M, between 9.3 and 3.5 kd as estimated by size-exclusion high-pressure liquid chromatography. ELISA and immunoblot techniques demonstrated that antibodies recognized homologous antigens as well as precursor proteins from normal brains (PrP33-35C) and the scrapie isoform of scrapie-associated proteins (PrP33-35Sc/CJD and PrP27-30) from scrapie- and CJD-infected brains. The normal, scrapie, and CJD isoforms of scrapie-associated proteins share common epitopes with varying degrees of interspecies homology. Specific antigen detected in neurons indicated that these proteins are synthesized primarily in these cells. In infected brains, extracellular amyloid deposits formed by the scrapie isoform of PrP protein also strongly reacted with anti-PrP antibodies.

Original languageEnglish
Pages (from-to)513-517
Number of pages5
JournalNeurology
Volume40
Issue number3
Publication statusPublished - 1990

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ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Clinical Neurology
  • Neuroscience(all)

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