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Norway

PMID:29556029  

TDP-43 gains function due to perturbed autoregulation in a Tardbp knock-in mouse model of ALS-FTD.

Matthew A White | Eosu Kim | Amanda Duffy | Robert Adalbert | Benjamin U Phillips | Owen M Peters | Jodie Stephenson | Sujeong Yang | Francesca Massenzio | Ziqiang Lin | Simon Andrews | Anne Segonds-Pichon | Jake Metterville | Lisa M Saksida | Richard Mead | Richard R Ribchester | Youssef Barhomi | Thomas Serre | Michael P Coleman | Justin R Fallon | Timothy J Bussey | Robert H Brown | Jemeen Sreedharan
Nature neuroscience | 2018

Amyotrophic lateral sclerosis-frontotemporal dementia (ALS-FTD) constitutes a devastating disease spectrum characterized by 43-kDa TAR DNA-binding protein (TDP-43) pathology. Understanding how TDP-43 contributes to neurodegeneration will help direct therapeutic efforts. Here we have created a TDP-43 knock-in mouse with a human-equivalent mutation in the endogenous mouse Tardbp gene. TDP-43Q331K mice demonstrate cognitive dysfunction and a paucity of parvalbumin interneurons. Critically, TDP-43 autoregulation is perturbed, leading to a gain of TDP-43 function and altered splicing of Mapt, another pivotal dementia-associated gene. Furthermore, a new approach to stratify transcriptomic data by phenotype in differentially affected mutant mice revealed 471 changes linked with improved behavior. These changes included downregulation of two known modifiers of neurodegeneration, Atxn2 and Arid4a, and upregulation of myelination and translation genes. With one base change in murine Tardbp, this study identifies TDP-43 misregulation as a pathogenic mechanism that may underpin ALS-FTD and exploits phenotypic heterogeneity to yield candidate suppressors of neurodegenerative disease.

Pubmed ID: 29556029

Associated grants

  • Agency: NIH HHS, United States
    Id: S10 OD016366
  • Agency: Motor Neurone Disease Association, United Kingdom
    Id: SITRAN/APR13/983-797
  • Agency: Medical Research Council, United Kingdom
    Id: MR/K010611/1
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS088689
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS065847
  • Agency: Motor Neurone Disease Association, United Kingdom
    Id: SITRAN/JUL16/987-797
  • Agency: Medical Research Council, United Kingdom
    Id: MR/L003813/1
  • Agency: National Centre for the Replacement, Refinement and Reduction of Animals in Research, United Kingdom
    Id: NC/N001451/1
  • Agency: FDA HHS, United States
    Id: R01 FD004127
  • Agency: Motor Neurone Disease Association, United Kingdom
    Id: SREEDHARAN/JAN13/943-795
  • Agency: Motor Neurone Disease Association, United Kingdom
    Id: SREEDHARAN/APR16/849-791
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS073873
  • Agency: Motor Neurone Disease Association, United Kingdom
    Id: RIBCHESTER/APR15/838-791

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