PrionPub Date : 2020-12-01DOI: 10.1080/19336896.2020.1859439
V A Siniukova, J V Sopova, S A Galkina, A P Galkin
{"title":"Search for functional amyloid structures in chicken and fruit fly female reproductive cells.","authors":"V A Siniukova, J V Sopova, S A Galkina, A P Galkin","doi":"10.1080/19336896.2020.1859439","DOIUrl":"https://doi.org/10.1080/19336896.2020.1859439","url":null,"abstract":"<p><p>We conducted a cytological search for amyloid structures in female reproductive cells of <i>Gallus gallus domesticus</i> and <i>Drosophila melanogaster</i>. We have shown that the amyloid-specific dye, Thioflavin S, but not Congo red, stains some cytoplasmic and even nuclear structures in chicken ovaries. In fruit fly eggs both Thioflavin S and Congo red specifically stain eggshell structures such as micropyle, dorsal appendages and pillars. Moreover, these structures, when stained with Congo red, demonstrate birefringence in polarized light, which is a characteristic feature of all classical amyloids. Our data show that female reproductive cells during evolution began to use amyloid fibrils to form various functional structures necessary for development under certain environmental conditions.</p>","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336896.2020.1859439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38695118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A patient with spastic paralysis finally diagnosed as V180I genetic Creutzfeldt-Jakob disease 9 years after onset.","authors":"Taichi Nomura, Ikuko Iwata, Ryoji Naganuma, Masaaki Matsushima, Katsuya Satoh, Tetsuyuki Kitamoto, Ichiro Yabe","doi":"10.1080/19336896.2020.1823179","DOIUrl":"10.1080/19336896.2020.1823179","url":null,"abstract":"ABSTRACT Genetic Creutzfeldt-Jakob disease (gCJD) with a mutation in codon 180 of the prion protein gene (V180I gCJD) is the most common form of gCJD in Japan, but only a few cases have been reported in Europe and the United States. It is clinically characterized by occurring in the elderly and presenting as slowly progressive dementia, although it generally shows less cerebellar and pyramidal symptoms than sporadic CJD. Here, we report a patient with V180I gCJD who initially presented with slowly progressive spastic paralysis with neither cerebrospinal fluid (CSF) nor magnetic resonance imaging (MRI) abnormalities. His symptoms progressed gradually, and after 9 years, he displayed features more typical of CJD. Diffusion-weighted MRI revealed high-intensity signals in the cortical gyrus, and there was a marked increase of 14-3-3 protein and total tau protein in the CSF, but he was negative for the real-time quaking-induced conversion assay. Although the time course was more consistent with Gerstmann-Sträussler-Scheinker disease than CJD, genetic testing revealed V180I gCJD. This is the first report of a patient with V180I gCJD who initially presented with spastic paralysis, and also the first to reveal that it took 9 years from disease onset for cortical dysfunction to develop and for MRI and CSF abnormalities to be detectable. In conclusion, we should screen for V180I gCJD in elderly patients presenting with slowly progressive spastic paralysis.","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336896.2020.1823179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38386640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2020-12-01DOI: 10.1080/19336896.2019.1704612
Vitaly V Kushnirov, Alexander A Dergalev, Alexander I Alexandrov
{"title":"Proteinase K resistant cores of prions and amyloids.","authors":"Vitaly V Kushnirov, Alexander A Dergalev, Alexander I Alexandrov","doi":"10.1080/19336896.2019.1704612","DOIUrl":"https://doi.org/10.1080/19336896.2019.1704612","url":null,"abstract":"<p><p>Amyloids and their infectious subset, prions, represent fibrillary aggregates with regular structure. They are formed by proteins that are soluble in their normal state. In amyloid form, all or part of the polypeptide sequence of the protein is resistant to treatment with proteinase K (PK). Amyloids can have structural variants, which can be distinguished by the patterns of their digestion by PK. In this review, we describe and compare studies of the resistant cores of various amyloids from different organisms. These data provide insight into the fine structure of amyloids and their variants as well as raise interesting questions, such as those concerning the differences between amyloids obtained <i>ex vivo</i> and <i>in vitro</i>, as well as the manner in which folding of one region of the amyloid can affect other regions.</p>","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336896.2019.1704612","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37490115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2020-12-01DOI: 10.1080/19336896.2020.1832946
Joanne M Tennant, Davin M Henderson, Thomas M Wisniewski, Edward A Hoover
{"title":"RT-QuIC detection of tauopathies using full-length tau substrates.","authors":"Joanne M Tennant, Davin M Henderson, Thomas M Wisniewski, Edward A Hoover","doi":"10.1080/19336896.2020.1832946","DOIUrl":"10.1080/19336896.2020.1832946","url":null,"abstract":"<p><p>Early detection and diagnosis of neurodegenerative diseases has been hampered by the lack of sensitive testing. Real-time quaking induced conversion (RT-QuIC) has been used for the early and sensitive detection of prion-induced neurologic disease, and has more recently been adapted to detect misfolded alpha-synuclein and tau as biomarkers for neurodegenerative disease. Here we use full-length recombinant tau substrates to detect tau seeding activity in Alzheimer's disease and other human tauopathies.</p>","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7671068/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38690739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2020-01-01DOI: 10.1080/19336896.2020.1776062
Alexey K Surin, Sergei Yu Grishin, Oxana V Galzitskaya
{"title":"Determination of amyloid core regions of insulin analogues fibrils.","authors":"Alexey K Surin, Sergei Yu Grishin, Oxana V Galzitskaya","doi":"10.1080/19336896.2020.1776062","DOIUrl":"https://doi.org/10.1080/19336896.2020.1776062","url":null,"abstract":"<p><p>A rapid-acting insulin lispro and long-acting insulin glargine are commonly used for the treatment of diabetes. Clinical cases have described the formation of injectable amyloidosis with these insulin analogues, but their amyloid core regions of fibrils were unknown. To reveal these regions, we have analysed the hydrolyzates of insulin fibrils and its analogues using high-performance liquid chromatography and mass spectrometry methods and found that insulin and its analogues have almost identical amyloid core regions that intersect with the predicted amyloidogenic regions. The obtained results can be used to create new insulin analogues with a low ability to form fibrils.</p><p><strong>Abbreviations: </strong>a.a., amino acid residues; HPLC-MS, high-performance liquid chromatography/mass spectrometry; m/z, mass-to-charge ratio; TEM, transmission electron microscopy.</p>","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336896.2020.1776062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38053237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2019-05-15DOI: 10.1080/19336896.2019.1615197
Meyer-Luehmann, C. Sigurdson, M. Jucker
{"title":"PRION 2019 emerging concepts","authors":"Meyer-Luehmann, C. Sigurdson, M. Jucker","doi":"10.1080/19336896.2019.1615197","DOIUrl":"https://doi.org/10.1080/19336896.2019.1615197","url":null,"abstract":"The presentation will summarize the results of various studies conducted at our research center that assess the transmissibility of the chronic wasting disease (CWD) agent to cattle, pigs, raccoons, goats, and sheep. This will include specifics of the relative attack rates, clinical signs, and microscopic lesions with emphasis on how to differentiate cross-species transmission of the CWD agent from the prion diseases that naturally occur in hosts such as cattle or sheep. Briefly, the relative difficulty of transmitting the CWD agent to sheep and goats will be contrasted with the relative ease of transmitting the scrapie agent to white-tailed deer. 2. RT-QuIC seed amplification assays in the diagnosis of prion diseases, synucleinopathies and tauopathies","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2019-01-01DOI: 10.1080/19336896.2019.1583041
Ben Allwein, Christina Kelly, Shaima Kammoonah, Thibault Mayor, Dale M Cameron
{"title":"Prion-dependent proteome remodeling in response to environmental stress is modulated by prion variant and genetic background.","authors":"Ben Allwein, Christina Kelly, Shaima Kammoonah, Thibault Mayor, Dale M Cameron","doi":"10.1080/19336896.2019.1583041","DOIUrl":"https://doi.org/10.1080/19336896.2019.1583041","url":null,"abstract":"<p><p>A number of fungal proteins are capable of adopting multiple alternative, self-perpetuating prion conformations. These prion variants are associated with functional alterations of the prion-forming protein and thus the generation of new, heritable traits that can be detrimental or beneficial. Here we sought to determine the extent to which the previously-reported ZnCl<sub>2</sub>-sensitivity trait of yeast harboring the [PSI<sup>+</sup>] prion is modulated by genetic background and prion variant, and whether this trait is accompanied by prion-dependent proteomic changes that could illuminate its physiological basis. We also examined the degree to which prion variant and genetic background influence other prion-dependent phenotypes. We found that ZnCl<sub>2</sub> exposure not only reduces colony growth but also limits chronological lifespan of [PSI<sup>+</sup>] relative to [psi<sup>-</sup>] cells. This reduction in viability was observed for multiple prion variants in both the S288C and W303 genetic backgrounds. Quantitative proteomic analysis revealed that under exposure to ZnCl<sub>2</sub> the expression of stress response proteins was elevated and the expression of proteins involved in energy metabolism was reduced in [PSI<sup>+</sup>] relative to [psi<sup>-</sup>] cells. These results suggest that cellular stress and slowed growth underlie the phenotypes we observed. More broadly, we found that prion variant and genetic background modulate prion-dependent changes in protein abundance and can profoundly impact viability in diverse environments. Thus, access to a constellation of prion variants combined with the accumulation of genetic variation together have the potential to substantially increase phenotypic diversity within a yeast population, and therefore to enhance its adaptation potential in changing environmental conditions.</p>","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336896.2019.1583041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36565738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2019-01-01DOI: 10.1080/19336896.2019.1651180
A. Balkema-Buschmann, Grit Priemer, R. Ulrich, R. Strobelt, Bob Hills, M. Groschup
{"title":"Deciphering the BSE-type specific cell and tissue tropisms of atypical (H and L) and classical BSE","authors":"A. Balkema-Buschmann, Grit Priemer, R. Ulrich, R. Strobelt, Bob Hills, M. Groschup","doi":"10.1080/19336896.2019.1651180","DOIUrl":"https://doi.org/10.1080/19336896.2019.1651180","url":null,"abstract":"ABSTRACT After the discovery of two atypical bovine spongiform encephalopathy (BSE) forms in France and Italy designated H- and L-BSE, the question arose whether these new forms differed from classical BSE (C-BSE) in their pathogenesis. Samples collected from cattle in the clinical stage of BSE during an intracranial challenge study with L- and H-BSE were analysed using biochemical and histological methods as well as in a transgenic mouse bioassay. Our results generally confirmed what had been described for C-BSE to be true also for both atypical BSE forms, namely the restriction of the pathological prion protein (PrPSc) and BSE infectivity to the nervous system. However, analysis of samples collected under identical conditions from both atypical H- and L-BSE forms allowed us a more precise assessment of the grade of involvement of different tissues during the clinical end stage of disease as compared to C-BSE. One important feature is the involvement of the peripheral nervous and musculoskeletal tissues in both L-BSE and H-BSE affected cattle. We were, however, able to show that in H-BSE cases, the PrPSc depositions in the central and peripheral nervous system are dominated by a glial pattern, whereas a neuronal deposition pattern dominates in L-BSE cases, indicating differences in the cellular and topical tropism of both atypical BSE forms. As a consequence of this cell tropism, H-BSE seems to spread more rapidly from the CNS into the periphery via the glial cell system such as Schwann cells, as opposed to L-BSE which is mostly propagated via neuronal cells.","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336896.2019.1651180","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43458636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2019-01-01DOI: 10.1080/19336896.2019.1607462
Christine K Ellis, Steven F Volker, Doreen L Griffin, Kurt C VerCauteren, Tracy A Nichols
{"title":"Use of faecal volatile organic compound analysis for ante-mortem discrimination between CWD-positive, -negative exposed, and -known negative white-tailed deer (Odocoileus virginianus).","authors":"Christine K Ellis, Steven F Volker, Doreen L Griffin, Kurt C VerCauteren, Tracy A Nichols","doi":"10.1080/19336896.2019.1607462","DOIUrl":"10.1080/19336896.2019.1607462","url":null,"abstract":"<p><p>Chronic wasting disease (CWD) is a naturally occurring infectious, fatal, transmissible spongiform encephalopathy of cervids. Currently, disease confirmation relies on post-mortem detection of infectious prions in the medial retropharyngeal lymph nodes or obex in the brain via immunohistochemistry (IHC). Detection of CWD in living animals using this method is impractical, and IHC and other experimental assays are not reliable in detecting low concentrations of prion present in biofluids or faeces. Here, we evaluate the capability of faecal volatile organic compound analysis to discriminate between CWD-positive and -exposed white-tailed deer located at two positive cervid farms, and two groups of CWD-negative deer from two separate disease-free farms.</p>","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7000150/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37194362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PrionPub Date : 2019-01-01Epub Date: 2018-11-14DOI: 10.1080/19336896.2018.1545524
Won-Hee Nam, Young Pyo Choi
{"title":"In vitro generation of tau aggregates conformationally distinct from parent tau seeds of Alzheimer's brain.","authors":"Won-Hee Nam, Young Pyo Choi","doi":"10.1080/19336896.2018.1545524","DOIUrl":"https://doi.org/10.1080/19336896.2018.1545524","url":null,"abstract":"ABSTRACT Normal monomeric tau can be converted into pathogenic aggregates and acquire protease resistance in a prion-like manner. This acquisition of partial protease-resistance in tau aggregates has to date only been partially investigated in various studies exploring the prion-like properties of tau. In this study, we induced the aggregation of tau repeat domain (RD) in cultured cells using detergent insoluble fractions of Alzheimer’s brain tissue as seeds. The seeded aggregation of tau RD in cultured cells formed a ~7 kDa protease-resistant fragment in contrast to the ~12 kDa tau fragment characteristic of the AD seeds, suggesting that the in vitro generated tau aggregates were conformationally distinct from parent seeds.","PeriodicalId":54585,"journal":{"name":"Prion","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336896.2018.1545524","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36720285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}