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Procedures for Identifying Infectious Prions After Passage Through the Digestive System of an Avian Species
Published on: November 6, 2013
Interspecies transmission of prions
E G Afanasieva1, V V Kushnirov, M D Ter-Avanesyan
1Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia.
Biochemistry. Biokhimiia
|February 21, 2012
Summary
Mammalian and yeast prions exhibit interspecies transmission barriers due to protein structure differences. These barriers, influenced by prion strain, are crucial for understanding prion disease mechanisms and transmission.
Area of Science:
- Neurodegenerative diseases
- Protein misfolding diseases
- Molecular biology
Background:
- Mammalian prions cause incurable neurodegenerative diseases.
- Interspecies prion transmission is typically blocked or difficult.
- Prion protein structural differences and prion strains create transmission barriers.
Purpose of the Study:
- To investigate the mechanisms underlying prion transmission barriers.
- To compare mammalian and yeast prion transmission barriers.
- To elucidate how protein structure influences prion infectivity.
Main Methods:
- Comparative analysis of mammalian and yeast prion protein structures.
- Studies on prion protein copolymerization.
- Examination of prion strain effects on transmission.
Main Results:
- Yeast prions mirror mammalian prion transmission barriers.
- Transmission barriers are evident even with copolymerization of prionogenic proteins.
- Interspecies differences in prion protein primary structure are key factors.
Conclusions:
- Yeast prions serve as a model for studying mammalian prion diseases.
- Understanding prion protein structure is vital for controlling prion spread.
- Mechanisms impeding prion transmission are elucidated by these findings.
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