N471D WASH complex subunit strumpellin knock-in mice display mild motor and cardiac abnormalities and BPTF and KLHL11 dysregulation in brain tissue

Clemen CS, Schmidt A, Winter L, Canneva F, Wittig I, Becker L, Coras R, Berwanger C, Hofmann A, Eggers B, Marcus K, Gailus-Durner V, Fuchs H, De Angelis MH, Kruger M, von Hörsten S, Eichinger L, Schröder R (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Neuropathology and Applied Neurobiology Wiley-Blackwell

DOI: 10.1111/nan.12750

Abstract

Aims We investigated N471D WASH complex subunit strumpellin (Washc5) knock-in and Washc5 knock-out mice as models for hereditary spastic paraplegia type 8 (SPG8). Methods We generated heterozygous and homozygous N471D Washc5 knock-in mice and subjected them to a comprehensive clinical, morphological and laboratory parameter screen, and gait analyses. Brain tissue was used for proteomic analysis. Furthermore, we generated heterozygous Washc5 knock-out mice. WASH complex subunit strumpellin expression was determined by qPCR and immunoblotting. Results Homozygous N471D Washc5 knock-in mice showed mild dilated cardiomyopathy, decreased acoustic startle reactivity, thinner eye lenses, increased alkaline phosphatase and potassium levels and increased white blood cell counts. Gait analyses revealed multiple aberrations indicative of locomotor instability. Similarly, the clinical chemistry, haematology and gait parameters of heterozygous mice also deviated from the values expected for healthy animals, albeit to a lesser extent. Proteomic analysis of brain tissue depicted consistent upregulation of BPTF and downregulation of KLHL11 in heterozygous and homozygous knock-in mice. WASHC5-related protein interaction partners and complexes showed no change in abundancies. Heterozygous Washc5 knock-out mice showing normal WASHC5 levels could not be bred to homozygosity. Conclusions While biallelic ablation of Washc5 was prenatally lethal, expression of N471D mutated WASHC5 led to several mild clinical and laboratory parameter abnormalities, but not to a typical SPG8 phenotype. The consistent upregulation of BPTF and downregulation of KLHL11 suggest mechanistic links between the expression of N471D mutated WASHC5 and the roles of both proteins in neurodegeneration and protein quality control, respectively.

Authors with CRIS profile

Roland Coras Institute of Neuropathology Stephan von Hörsten Professur für Experimentelle Biomedizin Rolf Schröder Professur für Neuropathologie

Involved external institutions

Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) / German Aerospace Center DE Germany (DE) Ruhr-Universität Bochum (RUB) DE Germany (DE) Universität zu Köln DE Germany (DE) Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt (HMGU) / Helmholtz Munich DE Germany (DE) Goethe-Universität Frankfurt am Main DE Germany (DE) The University of Melbourne AU Australia (AU)

How to cite

APA:

Clemen, C.S., Schmidt, A., Winter, L., Canneva, F., Wittig, I., Becker, L.,... Schröder, R. (2021). N471D WASH complex subunit strumpellin knock-in mice display mild motor and cardiac abnormalities and BPTF and KLHL11 dysregulation in brain tissue. Neuropathology and Applied Neurobiology. https://doi.org/10.1111/nan.12750

MLA:

Clemen, Christoph S., et al. "N471D WASH complex subunit strumpellin knock-in mice display mild motor and cardiac abnormalities and BPTF and KLHL11 dysregulation in brain tissue." Neuropathology and Applied Neurobiology (2021).

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