Spinal cord extracts of amyotrophic lateral sclerosis spread TDP-43 pathology in cerebral organoids
TLDR
In this paper , the propagation and spreading of pathogenic TAR DNA-binding protein 43 kDa (TDP-43) in human cerebral organoids was investigated. But, the authors did not find any evidence that the propagation of TAR-binding proteins in the human brain can mimic prion-like propagation in human CNS tissue.Abstract:
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder caused by progressive loss of motor neurons and there is currently no effective therapy. Cytoplasmic mislocalization and aggregation of TAR DNA-binding protein 43 kDa (TDP-43) within the CNS is a pathological hallmark in sporadic ALS and prion-like propagation of pathogenic TDP-43 is thought to be implicated in disease progression. However, cell-to-cell transmission of pathogenic TDP-43 in the human CNS has not been confirmed experimentally. Here we used induced pluripotent stem cells (iPSCs)-derived cerebral organoids as recipient CNS tissue model that are anatomically relevant human brain. We injected postmortem spinal cord protein extracts individually from three non-ALS or five sporadic ALS patients containing pathogenic TDP-43 into the cerebral organoids to validate the templated propagation and spreading of TDP-43 pathology in human CNS tissue. We first demonstrated that the administration of spinal cord extracts from an ALS patient induced the formation of TDP-43 pathology that progressively spread in a time-dependent manner in cerebral organoids, suggesting that pathogenic TDP-43 from ALS functioned as seeds and propagated cell-to-cell to form de novo TDP-43 pathology. We also reported that the administration of ALS patient-derived protein extracts caused astrocyte proliferation to form astrogliosis in cerebral organoids, reproducing the pathological feature seen in ALS. Moreover, we showed pathogenic TDP-43 induced cellular apoptosis and that TDP-43 pathology correlated with genomic damage due to DNA double-strand breaks. Thus, our results provide evidence that patient-derived pathogenic TDP-43 can mimic the prion-like propagation of TDP-43 pathology in human CNS tissue. Our findings indicate that our assays with human cerebral organoids that replicate ALS pathophysiology have a promising strategy for creating readouts that could be used in future drug discovery efforts against ALS. read more
Citations
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Current State and Future Directions in the Diagnosis of Amyotrophic Lateral Sclerosis
Maximilian Vidovic,Lars H. Müschen,Svenja Brakemeier,Gerrit Machetanz,Marcel Naumann,Sergio Castro-Gomez +5 more
TL;DR: In this article , the established procedures and future directions in the diagnostics of ALS are summarized to serve as a practical guideline and to improve the diagnostic pathway of this burdensome disease.
Journal ArticleDOI
Intercellular transmission of pathogenic proteins in ALS: Exploring the pathogenic wave
TL;DR: The most common subtype of familial ALS, caused by a hexanucleotide repeat expansion in the first intron of the C9orf72 gene (C9-ALS), is further characterized by the presence of aggregated dipeptide repeat proteins (DPRs) as mentioned in this paper .
References
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Journal ArticleDOI
Ubiquitinated TDP-43 in frontotemporal lobar degeneration and amyotrophic lateral sclerosis
Manuela Neumann,Deepak M. Sampathu,Linda K. Kwong,Adam C. Truax,Matthew Micsenyi,Thomas T. Chou,Jennifer Bruce,Theresa Schuck,Murray Grossman,Christopher M. Clark,Leo McCluskey,Bruce L. Miller,Eliezer Masliah,Ian R. A. Mackenzie,Howard Feldman,Wolfgang Feiden,Hans A. Kretzschmar,John Q. Trojanowski,Virginia M.-Y. Lee +18 more
TL;DR: It is shown that TDP-43 is the major disease protein in both frontotemporal lobar degeneration with ubiquitin-positive inclusions and amyotrophic lateral sclerosis.
Journal ArticleDOI
DNA Double-stranded Breaks Induce Histone H2AX Phosphorylation on Serine 139
TL;DR: In this paper, a histone H2AX species that has been phosphorylated specifically at serine 139 was found to be a major component of DNA double-stranded break.
Journal ArticleDOI
The mutational constraint spectrum quantified from variation in 141,456 humans
Konrad J. Karczewski,Laurent C. Francioli,Grace Tiao,Beryl B. Cummings,Jessica Alföldi,Qingbo Wang,Ryan L. Collins,Kristen M. Laricchia,Andrea Ganna,Daniel P. Birnbaum,Laura D. Gauthier,Harrison Brand,Matthew Solomonson,Nicholas A. Watts,Daniel R. Rhodes,Moriel Singer-Berk,Eleina M. England,Eleanor G. Seaby,Jack A. Kosmicki,Raymond K. Walters,Katherine Tashman,Yossi Farjoun,Eric Banks,Timothy Poterba,Arcturus Wang,Cotton Seed,Nicola Whiffin,Jessica X. Chong,Kaitlin E. Samocha,Emma Pierce-Hoffman,Zachary Zappala,Anne H. O’Donnell-Luria,Eric Vallabh Minikel,Ben Weisburd,Monkol Lek,James S. Ware,Christopher Vittal,Irina M. Armean,Louis Bergelson,Kristian Cibulskis,Kristen M. Connolly,Miguel Covarrubias,Stacey Donnelly,Steven Ferriera,Stacey Gabriel,Jeff Gentry,Namrata Gupta,Thibault Jeandet,Diane Kaplan,Christopher Llanwarne,Ruchi Munshi,Sam Novod,Nikelle Petrillo,David Roazen,Valentin Ruano-Rubio,Andrea Saltzman,Molly Schleicher,Jose Soto,Kathleen Tibbetts,Charlotte Tolonen,Gordon Wade,Michael E. Talkowski,Benjamin M. Neale,Mark J. Daly,Daniel G. MacArthur +64 more
TL;DR: A catalogue of predicted loss-of-function variants in 125,748 whole-exome and 15,708 whole-genome sequencing datasets from the Genome Aggregation Database (gnomAD) reveals the spectrum of mutational constraints that affect these human protein-coding genes.
Journal ArticleDOI
The Ensembl Variant Effect Predictor.
William M. McLaren,Laurent Gil,Sarah E. Hunt,Harpreet Singh Riat,Graham R. S. Ritchie,Anja Thormann,Paul Flicek,Fiona Cunningham +7 more
TL;DR: The Ensembl Variant Effect Predictor can simplify and accelerate variant interpretation in a wide range of study designs.
Journal ArticleDOI
Expanded GGGGCC hexanucleotide repeat in noncoding region of C9ORF72 causes chromosome 9p-linked FTD and ALS
Mariely DeJesus-Hernandez,Ian R. A. Mackenzie,Bradley F. Boeve,Adam L. Boxer,Matt Baker,Nicola J. Rutherford,Alexandra M. Nicholson,Ni Cole A. Finch,Heather C. Flynn,Jennifer Adamson,Naomi Kouri,Aleksandra Wojtas,Pheth Sengdy,Ging-Yuek Robin Hsiung,Anna Karydas,William W. Seeley,Keith A. Josephs,Giovanni Coppola,Daniel H. Geschwind,Zbigniew K. Wszolek,Howard Feldman,Howard Feldman,David S. Knopman,Ronald C. Petersen,Bruce L. Miller,Dennis W. Dickson,Kevin B. Boylan,Neill R. Graff-Radford,Rosa Rademakers +28 more
TL;DR: It is found that repeat expansion in C9ORF72 is a major cause of both FTD and ALS, suggesting multiple disease mechanisms.