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Prusiner, S.B. (1982) Novel proteinaceous infectious particles cause scrapie. Science, 216(4542), 136-144.

**Prusiner, S.B. (1982) Novel proteinaceous infectious particles cause scrapie. Science, 216(4542), 136-144.**

The world of infectious diseases has long been dominated by the understanding that viruses, bacteria, and fungi are the primary culprits behind many illnesses. However, in 1982, a groundbreaking paper by Stanley B. Prusiner challenged this conventional wisdom, introducing a new concept that would change the face of infectious disease research forever. Published in the prestigious journal Science, Prusiner’s seminal work, “Novel proteinaceous infectious particles cause scrapie,” presented evidence for the existence of a new class of infectious agents: prions.

Prions, short for “proteinaceous infectious particles,” are misfolded proteins that can induce normal proteins in the brain to also misfold, leading to a cascade of cellular damage and disease. Prusiner’s research focused on scrapie, a transmissible spongiform encephalopathy (TSE) that affects sheep and goats. TSEs are a group of rare, fatal brain diseases that also include bovine spongiform encephalopathy (BSE or mad cow disease) and Creutzfeldt-Jakob disease in humans.

Prusiner’s work was revolutionary because it showed that scrapie, and by extension other TSEs, were not caused by traditional infectious agents like viruses or bacteria, but rather by a misfolded protein. This discovery opened up new avenues of research into the causes and mechanisms of TSEs, and has had significant implications for our understanding of neurodegenerative diseases more broadly. For example, the realization that prions can transmit disease has led to strict controls on the animal feed chain, to prevent the spread of BSE through contaminated feed.

The study of prions has also shed light on the complex relationships between protein structure, misfolding, and disease. Prusiner’s work has inspired new areas of research into the role of protein misfolding in other neurodegenerative diseases, such as Alzheimer’s and Parkinson’s. Furthermore, the discovery of prions has raised important questions about the nature of infectious disease, and has challenged our traditional understanding of the relationship between pathogens and disease.

Today, Prusiner’s 1982 paper is recognized as a landmark publication in the field of infectious disease research. His work has been widely acknowledged, including his award of the Nobel Prize in Physiology or Medicine in 1997 for his discovery of prions. As we continue to explore the complexities of prion biology and its implications for human disease, we are reminded of the power of innovative thinking and rigorous scientific inquiry to challenge our assumptions and advance our understanding of the world.

In conclusion, Prusiner’s 1982 paper, “Novel proteinaceous infectious particles cause scrapie,” marked a significant turning point in our understanding of infectious diseases, and has had a lasting impact on the field of research. As we look to the future, it is clear that the study of prions and protein misfolding will continue to play a critical role in our quest to understand and combat neurodegenerative diseases.