C-terminal-deleted prion protein fragment is a major accumulated component of systemic PrP deposits in hereditary prion disease with a 2-Bp (CT) deletion in PRNP codon 178

Hiroyuki Honda, Kosuke Matsuzono, Soichiro Fushimi, Kota Sato, Satoshi O. Suzuki, Koji Abe, Toru Iwaki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Prion protein (PrP) has 2 glycosylated sites and a glycosylphosphatidylinositol (GPI) anchor on the C-terminal. Reports on genetic prion disease with GPI anchorless PrP are very limited. In this study, we characterized the molecular alterations of mutated PrP in a 37-year-old female autopsy case with a recently identified PRNP mutation involving a 2-bp deletion in codon 178 that results in a premature stop codon mutation in codon 203. Postmortem examination revealed numerous irregularly shaped coarse PrP deposits and multicentric plaques in the brain that were mainly comprised of C-terminal deleted abnormal PrP primarily derived from the mutant allele. Additionally, abnormal PrP deposits were detected in almost all other examined organs. PrP was mainly deposited in peripheral nerves, smooth muscles, and blood vessels in non-CNS tissues. Western blot analysis after proteinase K treatment showed protease-resistant PrP (PrPres) signals with a molecular weight of 9 kDa; weak PrPres smear signals of 9 to 80 kDa were also noted. Gel filtration revealed that PrPres oligomers were mainly composed of the PrP fragments. In conclusion, the mutated PrP lacking that GPI anchor was truncated shortly and deposited in almost every examined organ.

Original languageEnglish
Pages (from-to)1008-1019
Number of pages12
JournalJournal of Neuropathology and Experimental Neurology
Volume75
Issue number11
DOIs
Publication statusPublished - 2016

Keywords

  • Angiopathy
  • Neurofibrillary tangle
  • Oligomer
  • Prion protein
  • PRNP

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Neurology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience

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