4.6 Article

Experimental Verification of a Traceback Phenomenon in Prion Infection

Journal

JOURNAL OF VIROLOGY
Volume 84, Issue 7, Pages 3230-3238

Publisher

AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.02387-09

Keywords

-

Categories

Funding

  1. Program for Promotion of Fundamental Studies in Health Sciences of National Institute of Biomedical Innovation
  2. Ministry of Health, Labor and Welfare
  3. Ministry of Education, Culture, Sports, Science and Technology

Ask authors/readers for more resources

The clinicopathological phenotypes of sporadic Creutzfeldt-Jakob disease (sCJD) correlate with the allelo-types (M or V) of the polymorphic codon 129 of the human prion protein (PrP) gene and the electrophoretic mobility patterns of abnormal prion protein (PrPSc). Transmission of sCJD prions to mice expressing human PrP with a heterologous genotype (referred to as cross-sequence transmission) results in prolonged incubation periods. We previously reported that cross-sequence transmission can generate a new prion strain with unique transmissibility, designated a traceback phenomenon. To verify experimentally the traceback of sCJD-VV2 prions, we inoculated sCJD-VV2 prions into mice expressing human PrP with the 129M/M genotype. These 129M/M mice showed altered neuropathology and a novel PrPSc type after a long incubation period. We then passaged the brain homogenate from the 129M/M mouse inoculated with sCJD-VV2 prions into other 129M/M or 129V/V mice. Despite cross-sequence transmission, 129V/V mice were highly susceptible to these prions compared to the 129M/M mice. The neuropathology and PrPSc type of the 129V/V mice inoculated with the 129M/M mouse-passaged sCJD-VV2 prions were identical to those of the 129V/V mice inoculated with sCJD-VV2 prions. Moreover, we generated for the first time a type 2 PrPSc-specific antibody in addition to type 1 PrPSc-specific antibody and discovered that drastic changes in the PrPSc subpopulation underlie the traceback phenomenon. Here, we report the first direct evidence of the traceback in prion infection.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

Article Virology

Establishment of a simplified inverse polymerase chain reaction method for diagnosis of enzootic bovine leukosis

Asami Nishimori, Kiyohiko Andoh, Yuichi Matsuura, Asuka Kumagai, Shinichi Hatama

Summary: A simplified inverse PCR method was established to diagnose EBL, demonstrating high sensitivity and specificity in detecting clonal expansion of infected cells. This method has the potential to efficiently determine virus-dependent bovine leukemia and enhance EBL diagnosis following further clinical investigations.

ARCHIVES OF VIROLOGY (2021)

Article Multidisciplinary Sciences

The prion protein is not required for peripheral nerve de- and remyelination after crush injury

Anna Henzi, Adriano Aguzzi

Summary: The study found that PrP is not essential for peripheral nerve repair processes, and Adgrg6 may sustain its function in peripheral nerve repair independently of its activation by PrP.

PLOS ONE (2021)

Article Allergy

Systemic and mucosal antibody responses specific to SARS-CoV-2 during mild versus severe COVID-19

Carlo Cervia, Jakob Nilsson, Yves Zurbuchen, Alan Valaperti, Jens Schreiner, Aline Wolfensberger, Miro E. Raeber, Sarah Adamo, Sebastian Weigang, Marc Emmenegger, Sara Hasler, Philipp P. Bosshard, Elena De Cecco, Esther Baechli, Alain Rudiger, Melina Stuessi-Helbling, Lars C. Huber, Annelies S. Zinkernagel, Dominik J. Schaer, Adriano Aguzzi, Georg Kochs, Ulrike Held, Elsbeth Probst-Mueller, Silvana K. Rampini, Onur Boyman

Summary: The study found that severe COVID-19 patients experienced a significant increase in SARS-CoV-2 antibody titers after symptom onset, especially with high IgA titers, while mild cases may exhibit transient production of SARS-CoV-2-specific antibodies. Interestingly, some healthcare workers with negative serum antibody titers showed SARS-CoV-2-specific IgA in mucosal fluids with virus-neutralizing capacity in some cases.

JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY (2021)

Article Multidisciplinary Sciences

Pericytes regulate vascular immune homeostasis in the CNS

Orsolya Toeroek, Bettina Schreiner, Johanna Schaffenrath, Hsing-Chuan Tsai, Upasana Maheshwari, Sebastian A. Stifter, Christina Welsh, Ana Amorim, Sucheta Sridhar, Sebastian G. Utz, Wiebke Mildenberger, Sina Nassiri, Mauro Delorenzi, Adriano Aguzzi, May H. Han, Melanie Greter, Burkhard Becher, Annika Keller

Summary: Pericytes regulate leukocyte infiltration in the adult central nervous system and play a role in neuroinflammation.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

Review Infectious Diseases

Patient-blood management for COVID19 convalescent plasma therapy: relevance of affinity and donor-recipient differences in concentration of neutralizing antibodies

Daniele Focosi, Fabrizio Maggi, Massimo Franchini, Adriano Aguzzi, Maria Lanza, Alessandro Mazzoni, Francesco Menichetti

Summary: This study focuses on separating study design variables that could affect the clinical outcome of COVID-19 convalescent plasma therapy. Neglecting variables such as pretransfusion antibody testing in recipients, dose adjustments, and antibody affinity measurements has impacted the outcomes of the majority of clinical trials to date. Understanding and addressing these variables is crucial for the design of future CCP clinical trials to improve clinical outcomes and reduce risks of immune evasion.

CLINICAL MICROBIOLOGY AND INFECTION (2021)

Article Genetics & Heredity

The role of macrophage scavenger receptor 1 (Msr1) in prion pathogenesis

Bei Li, Meiling Chen, Adriano Aguzzi, Caihong Zhu

Summary: The study found that while Msr1 expression is upregulated in prion-infected mouse brains, deficiency of Msr1 does not impact disease progression or lesion patterns. This suggests that Msr1 does not play a major role in prion pathogenesis.

JOURNAL OF MOLECULAR MEDICINE-JMM (2021)

Article Biochemistry & Molecular Biology

Scaling analysis reveals the mechanism and rates of prion replication in vivo

Georg Meisl, Timothy Kurt, Itzel Condado-Morales, Cyrus Bett, Silvia Sorce, Mario Nuvolone, Thomas C. T. Michaels, Daniel Heinzer, Merve Avar, Samuel I. A. Cohen, Simone Hornemann, Adriano Aguzzi, Christopher M. Dobson, Christina J. Sigurdson, Tuomas P. J. Knowles

Summary: Prions, consisting of pathological aggregates of cellular prion protein, have the ability to replicate and cause neurodegenerative diseases. The formation of these aggregates and their rates have been challenging to elucidate in vivo. Using a mathematical framework and microfluidic measurements in mice, the overall aggregation reaction has been dissected into constituent processes and reaction rates quantified. Results show that prion multiplication in vivo is slower than in vitro, but efficient compared with other amyloid systems, displaying scaling behavior characteristic of aggregate fragmentation. This provides a framework for understanding disease-associated aggregation processes within living organisms.

NATURE STRUCTURAL & MOLECULAR BIOLOGY (2021)

Article Multidisciplinary Sciences

Mechanism of misfolding of the human prion protein revealed by a pathological mutation

Maximo Sanz-Hernandez, Joseph D. Barritt, Jens Sobek, Simone Hornemann, Adriano Aguzzi, Alfonso De Simone

Summary: The T183A variant of human PrP significantly enhances aggregation propensity, leading to amyloid formation under physiological conditions by the sole C-terminal domain of the protein. The study identified the structural characteristics of the misfolded intermediate promoting aggregation of T183A huPrP and the interactions preventing the population of this species in the wild-type protein, supporting the use of POM antibodies to suppress the aggregation of this amyloidogenic mutant.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

Article Clinical Neurology

Glial activation in prion diseases is selectively triggered by neuronal PrPSc

Asvin K. K. Lakkaraju, Silvia Sorce, Assunta Senatore, Mario Nuvolone, Jingjing Guo, Petra Schwarz, Rita Moos, Pawel Pelczar, Adriano Aguzzi

Summary: Prion infections cause derangement in glial cells but not in neurons. Expressing PrP(C) selectively in neurons and astrocytes of mice, we found that prion accumulation and disease occurred in neuron-restricted expression, while astrocyte-restricted expression did not lead to clinical disease or inflammation. This suggests a nonautonomous mechanism in which prion-infected neurons instruct astrocytes and microglia to drive neural dysfunction.

BRAIN PATHOLOGY (2022)

Article Immunology

Extended application of the rapid post-mortem test kit for bovine spongiform encephalopathy to chronic wasting disease

Yuichi Matsuura, Kohtaro Miyazawa, Motohiro Horiuchi, Akio Suzuki, Mayumi Yokoyama, Morikazu Imamura, Keigo Ikeda, Yoshifumi Iwamaru

Summary: The present study demonstrated that a rapid post-mortem test kit used for bovine spongiform encephalopathy surveillance in Japan is also valid for detecting chronic wasting disease (CWD) prion.

MICROBIOLOGY AND IMMUNOLOGY (2022)

Article Microbiology

Novel single nucleotide polymorphisms in the bovine leukemia virus genome are associated with proviral load and affect the expression profile of viral non-coding transcripts

Kiyohiko Andoh, Masataka Akagami, Asami Nishimori, Yuichi Matsuura, Asuka Kumagai, Shinichi Hatama

Summary: This study identified novel SNPs in the AS1 coding region and showed that individuals infected with BLV carrying minor SNPs exhibited low proviral load. Construction of infectious clones with these SNPs indicated changes in the expression profile of AS1 RNA, with an increase in the AS1-L isoform. Prediction analysis suggested that the introduced SNPs altered the secondary structure of AS1 RNA.

VETERINARY MICROBIOLOGY (2021)

Article Microbiology

Anti-prothrombin autoantibodies enriched after infection with SARS-CoV-2 and influenced by strength of antibody response against SARS-CoV-2 proteins

Marc Emmenegger, Sreedhar Saseendran F. Kumar, Vishalini J. Emmenegger, Tomas J. Malinauskas, Thomas Buettner, Laura Rose, Peter Schierack, Martin B. Sprinzl, Clemens Sommer, Karl B. Lackner, Adriano Aguzzi, Dirk B. Roggenbuck, Katrin B. M. Frauenknecht

Summary: SARS-CoV-2 infection can lead to diverse symptoms, with some patients developing hypercoagulation and autoantibody responses. Research has shown that infection with SARS-CoV-2 can result in the production of autoantibodies, particularly IgM antibodies targeting coagulation proteins. Further investigation is needed to explore the relationship between SARS-CoV-2 infection, autoantibody production, and disease severity.

PLOS PATHOGENS (2021)

Article Biology

Brain aging is faithfully modelled in organotypic brain slices and accelerated by prions

Yingjun Liu, Assunta Senatore, Silvia Sorce, Mario Nuvolone, Jingjing Guo, Zeynep H. Gumus, Adriano Aguzzi

Summary: Cultured brain slices from mice upregulate senescence-associated genes and reproduce transcriptional characteristics of aged brains. Prions accelerate brain aging. This study establishes an innovative model system for studying brain aging.

COMMUNICATIONS BIOLOGY (2022)

Correction Biology

Brain aging is faithfully modelled in organotypic brain slices and accelerated by prions (vol 5, 557, 2022)

Yingjun Liu, Assunta Senatore, Silvia Sorce, Mario Nuvolone, Jingjing Guo, Zeynep H. Gumus, Adriano Aguzzi

COMMUNICATIONS BIOLOGY (2022)

Article Clinical Neurology

Rapid ex vivo reverse genetics identifies the essential determinants of prion protein toxicity

Regina R. Reimann, Martina Puzio, Antonella Rosati, Marc Emmenegger, Bernard L. Schneider, Pamela Valdes, Danzhi Huang, Amedeo Caflisch, Adriano Aguzzi

Summary: The cellular prion protein PrPC mediates neurotoxicity of prions and protein aggregates, but the mechanisms are not well understood. Antibody-derived ligands against PrPC induce neurotoxicity through hydrogen bonding and suppressing this bond prolongs the lives of prion-infected mice, suggesting convergent pathways. A study found that the toxic effects of these ligands require a specific amino acid residue within PrPC, which could be a potential target for preventing prion-related neurodegeneration.

BRAIN PATHOLOGY (2023)

No Data Available