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Expression of TDP-43 C-terminal Fragments in Vitro Recapitulates Pathological Features of TDP-43 Proteinopathies
Open accessAbstract
The disease protein in frontotemporal lobar degeneration with ubiquitin-positive inclusions (FTLD-U) and amyotrophic lateral sclerosis (ALS) was identified recently as the TDP-43 (TAR DNA-binding protein 43), thereby providing a molecular link between these two disorders. In FTLD-U and ALS, TDP-43 is redistributed from its normal nuclear localization to form cytoplasmic insoluble aggregates. Moreover, pathological TDP-43 is abnormally ubiquitinated, hyperphosphorylated, and N-terminally cleaved to generate C-terminal fragments (CTFs). However, the specific cleavage site(s) and the biochemical properties as well as the functional consequences of pathological TDP-43 CTFs remained unknown. Here we have identified the specific cleavage site, Arg(208), of a pathological TDP-43 CTF purified from FTLD-U brains and show that the expression of this and other TDP-43 CTFs in cultured cells recapitulates key features of TDP-43 proteinopathy. These include the formation of cytoplasmic aggregates that are ubiquitinated and abnormally phosphorylated at sites found in FTLD-U and ALS brain and spinal cord samples. Furthermore, we observed splicing abnormalities in a cell culture system expressing TDP-43 CTFs, and this is significant because the regulation of exon splicing is a known function of TDP-43. Thus, our results show that TDP-43 CTF expression recapitulates key biochemical features of pathological TDP-43 and support the hypothesis that the generation of TDP-43 CTFs is an important step in the pathogenesis of FTLD-U and ALS.
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Cites
Ubiquitinated TDP-43 in Frontotemporal Lobar Degeneration and Amyotrophic Lateral Sclerosis
Neumann, M., Sampathu, D. M., Kwong, L. K., Truax, A. C., Micsenyi, M. C., Chou, T. T., Bruce, J., Schuck, T., Grossman, M., Clark, C. M., et al. (2006) · Science · doi:10.1126/science.1134108 · Cited by 6,576
Self-citationArai, T., Hasegawa, M., Akiyama, H., Ikeda, K., Nonaka, T., Mori, H., Mann, D., Tsuchiya, K., Yoshida, M., Hashizume, Y., et al. (2006) · Biochemical and Biophysical Research Communications · doi:10.1016/j.bbrc.2006.10.093 · Cited by 2,732
TDP-43 Mutations in Familial and Sporadic Amyotrophic Lateral Sclerosis
Sreedharan, J., Blair, I. P., Tripathi, V. B., Hu, X., Vance, C., Rogelj, B., Ackerley, S., Durnall, J. C., Williams, K. L., Buratti, E., et al. (2008) · Science · doi:10.1126/science.1154584 · Cited by 2,630
TARDBP mutations in individuals with sporadic and familial amyotrophic lateral sclerosis
Kabashi, E., Valdmanis, P. N., Dion, P., Spiegelman, D., McConkey, B. J., Velde, C. V., Bouchard, J.-P., Lacomblez, L., Pochigaeva, K., Salachas, F., et al. (2008) · Nature Genetics · doi:10.1038/ng.132 · Cited by 1,544
Phosphorylated TDP‐43 in frontotemporal lobar degeneration and amyotrophic lateral sclerosis
Hasegawa, M., Arai, T., Nonaka, T., Kametani, F., Yoshida, M., Hashizume, Y., Beach, T. G., Buratti, E., Baralle, F., Morita, M., et al. (2008) · Annals of Neurology · doi:10.1002/ana.21425 · Cited by 777
Cited by
Characterizing the RNA targets and position-dependent splicing regulation by TDP-43
Tollervey, J. R., Curk, T., Rogelj, B., Briese, M., Cereda, M., Kayikci, M., König, J., Hortobágyi, T., Nishimura, A. L., Župunski, V., et al. (2011) · Nature Neuroscience · doi:10.1038/nn.2778 · Cited by 1,165
Roles of tau protein in health and disease
Guo, T., Noble, W., & Hanger, D. P. (2017) · Acta Neuropathologica · doi:10.1007/s00401-017-1707-9 · Cited by 1,003
TDP-43 and FUS/TLS: emerging roles in RNA processing and neurodegeneration
Lagier-Tourenne, C., Polymenidou, M., & Cleveland, D. W. (2010) · Human Molecular Genetics · doi:10.1093/hmg/ddq137 · Cited by 1,021
Molecular Mechanisms of TDP-43 Misfolding and Pathology in Amyotrophic Lateral Sclerosis
Prasad, A., Bharathi, V., Sivalingam, V., Girdhar, A., & Patel, B. K. (2019) · Frontiers in Molecular Neuroscience · doi:10.3389/fnmol.2019.00025 · Cited by 774
TDP-43 mutant transgenic mice develop features of ALS and frontotemporal lobar degeneration
Wegorzewska, I., Bell, S., Cairns, N. J., Miller, T. M., & Baloh, R. H. (2009) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0908767106 · Cited by 706
Metadata
- Authors
- Igaz, L. M., Kwong, L. K., Chen-Plotkin, A., Winton, M. J., Unger, T. L., Xu, Y., Neumann, M., Trojanowski, J. Q., & Lee, V. M.-Y.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 2009-03
- Volume
- 284
- Issue
- 13
- Pages
- 8516-8524
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1974298458
- Cited by
- 359
- References
- 5
- FWCI
- 20.25
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Igaz, L. M., Kwong, L. K., Chen-Plotkin, A., Winton, M. J., Unger, T. L., Xu, Y., Neumann, M., Trojanowski, J. Q., & Lee, V. M.-Y. (2009). Expression of TDP-43 C-terminal Fragments in Vitro Recapitulates Pathological Features of TDP-43 Proteinopathies. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m809462200
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