Publications related to Fungal prion

Method of preparation of amyloidogenic protein aggregates and uses thereof

The invention relates to methods for the preparation of method of preparation of Tau aggregates, including fibrils, fibrillar species, soluble and insoluble oligomeric species, new Tau aggregates and uses thereof. The invention further relates to the uses ...

2024

Discontinuous Galerkin methods for Fisher-Kolmogorov equation with application to a-synuclein spreading in Parkinson's disease

Alfio Quarteroni, Francesca Bonizzoni

This spreading of prion proteins is at the basis of brain neurodegeneration. This paper deals with the numerical modelling of the misfolding process of a-synuclein in Parkinson's disease. We introduce and analyse a discontinuous Galerkin method for the sem ...

Elsevier Science Sa2023

Trans‐seeding of Alzheimer‐related tau protein by a yeast prion

Henning Paul-Julius Stahlberg, Zhiva Skachokova

Abnormal tau protein aggregates constitute a hallmark of Alzheimer's disease. The mechanisms underlying the initiation of tau aggregation in sporadic neurodegeneration remain unclear. Here we investigate whether a non-human prion can seed tau aggregation. ...

2022

Unraveling the complexity of amyloid polymorphism using gold nanoparticles and cryo-EM

Francesco Stellacci, Hilal Lashuel, Nadine Aït Bouziad, Paulo Henrique Jacob Silva, Anass Chiki, Zekiye Pelin Güven, Urszula Beata Cendrowska, Sophie Vieweg, Marie Mueller

Increasing evidence suggests that amyloid polymorphism gives rise to different strains of amyloids with distinct toxicities and pathology-spreading properties. Validating this hypothesis is challenging due to a lack of tools and methods that allow for the ...

National Academy of Sciences2020

Molecular dissection of amyloid disaggregation by human HSP70

Paolo De Los Rios, Alessandro Barducci

The molecular steps that lead to the disaggregation of amyloid fibrils are shown to involve the synergistic action of HSP70 and its co-chaperones DNAJB1 and HSP110. ...

NATURE RESEARCH2020

Oligomerization Profile of Human Transthyretin Variants with Distinct Amyloidogenicity

Bruno Emanuel Ferreira De Sousa Correia

One of the molecular hallmarks of amyloidoses is ordered protein aggregation involving the initial formation of soluble protein oligomers that eventually grow into insoluble fibrils. The identification and characterization of molecular species critical for ...

2020

The metalloprotease ADAMTS4 generates N-truncated A4-x species and marks oligodendrocytes as a source of amyloidogenic peptides in Alzheimer's disease

Patrick Fraering, Mitko Dimitrov, Hermeto Gerber, Sandra Lehmann

Brain accumulation and aggregation of amyloid- (A) peptides is a critical step in the pathogenesis of Alzheimer's disease (AD). Full-length A peptides (mainly A1-40 and A1-42) are produced through sequential proteolytic cleavage of the amyloid precursor pr ...

SPRINGER2019

Microtubule-Binding R3 Fragment from Tau Self-Assembles into Giant Multistranded Amyloid Ribbons

Hilal Lashuel, Nadine Aït Bouziad, Raffaele Mezzenga

Tau protein and its fragments self-assemble into amyloid fibrils in the presence of polyanions, such as heparin. By combining microscopy, scattering, and spectroscopy techniques, we studied the aggregation of the 26-mer Tau-derived peptide alone, Tau306-32 ...

Wiley-VCH Verlag GmbH2016

An Intein-based Strategy for the Production of Tag-free Huntingtin Exon 1 Proteins Enables New Insights into the Polyglutamine Dependence of Httex1 Aggregation and Fibril Formation

Hilal Lashuel, Annalisa Ansaloni, Sophie Vieweg, John Blaine Warner IV

The first exon of the Huntingtin protein (Httex1) is one of the most actively studied Htt fragments because its overexpression in R6/2 transgenic mice has been shown to recapitulate several key features of Huntington disease. However, the majority of bioph ...

Amer Soc Biochemistry Molecular Biology Inc2016

In Vivo Longitudinal (1)H MRS Study of Transgenic Mouse Models of Prion Disease in the Hippocampus and Cerebellum at 14.1 T

Rolf Gruetter, Cristina Ramona Cudalbu, Mélanie Craveiro

In vivo (1)H MR spectroscopy allows the non invasive characterization of brain metabolites and it has been used for studying brain metabolic changes in a wide range of neurodegenerative diseases. The prion diseases form a group of fatal neurodegenerative d ...

Springer Verlag2015

The Protein-disulfide Isomerase ERp57 Regulates the Steady-state Levels of the Prion Protein

Maurizio Molinari

Although the accumulation of a misfolded and protease-resistant form of the prion protein (PrP) is a key event in prion pathogenesis, the cellular factors involved in its folding and quality control are poorly understood. PrP is a glycosylated and disulfid ...

Amer Soc Biochemistry Molecular Biology Inc2015

Ultrafast photoinduced processes in metal - containing molecular complexes and in proteins

Roberto Monni

The aim of this thesis is to investigate the ultrafast inter¿ and intra¿molecular processes, occurring in both metal¿containing molecular complexes and in proteins, by means of ultrafast Transient Absorption (TA) spectroscopy. The first part of the thesis ...

EPFL2015

Concentration-dependent and surface-assisted self-assembly properties of a bioactive estrogen receptor alpha-derived peptide

Giovanni Dietler, Francesco Simone Ruggeri

We have synthesized a 17-mer peptide (ER17p) that is issued from the hinge region of the estrogen receptor and which activates the proliferation of breast carcinoma cells in steroid-deprived conditions. In the present paper, we show that at a concentration ...

Wiley-Blackwell2015

Two Misfolding Routes for the Prion Protein around pH 4.5

Ursula Röthlisberger, Ivano Tavernelli

Using molecular dynamics simulations, we show that the prion protein (PrP) exhibits a dual behavior, with two possible transition routes, upon protonation of H187 around pH 4.5, which mimics specific conditions encountered in endosomes. Our results suggest ...

Public Library Science2013

Prion versus Doppel Protein Misfolding: New Insights from Replica-Exchange Molecular Dynamics Simulations

Ursula Röthlisberger, Ivano Tavernelli

The doppel (Dpl) and prion (PrP) proteins share a very similar fold (three helices and two short beta-strands), while they differ significantly in sequence (only 25% homologous) and in disease-related beta-rich conformations that occur for PrP only. In a p ...

American Chemical Society2013

Transgenic expression of beta 1 antibody in brain neurons impairs age-dependent amyloid deposition in APP23 mice

Maurizio Molinari, Paolo Paganetti

Heterologous expression of the functional amyloid beta (A beta) antibody beta 1 in the central nervous system was engineered to maximize antibody exposure in the brain and assess the effects on A beta production and accumulation in these conditions. A sing ...

Elsevier Science Inc2013

Characterisation of Living Matter Using Advanced Spectroscopy Techniques

Markus Bonda

In the context of an ageing society neurodegenerative disease have become more and more frequent among humans. Opposing the benefits of a longer life, these diseases have thus triggered research on neurons and how they interact with each other. In vitro as ...

EPFL2011

The Gamma-Secretase-Mediated Proteolytic Processing of APP C-Terminal Fragments as a Therapeutic Target for Alzheimer's Disease

Jemila Houacine

Alzheimer's disease (AD) is a devastating neurodegenerative disorder which severely impairs cognitive functions by triggering neuronal cell death and synaptic loss, and finally leads the patients to death. Two main histopathological hallmarks can be found ...

EPFL2011

1) Trace copper(II) or zinc(II) ions drastically modify the aggregation behaviour of Aβ1–42: an AFM study

Angela Casini, Andrea Innocenti Malini

Formation of amyloid-beta (A beta)(1-42) amyloid fibrils, a characteristic feature of Alzheimer's disease (AD), was monitored in situ through atomic force microscopy (AFM). Well-structured amyloid fibrils slowly formed in solution within 24 hours for which ...

2010

Understanding amyloid aggregation by statistical analysis of atomic force microscopy images

Giovanni Dietler, Paolo De Los Rios, Jérôme Flakowski, Raffaele Mezzenga

The aggregation of proteins is central to many aspects of daily life, including food processing, blood coagulation, eye cataract formation disease and prion-related neurodegenerative infections[1–5]. However, the physical mechanisms responsible for amyloid ...

Nature Publishing Group2010