Abstract
The RNA-binding protein TDP-43 regulates RNA metabolism at multiple levels, including transcription, RNA splicing, and mRNA stability. TDP-43 is a major component of the cytoplasmic inclusions characteristic of amyotrophic lateral sclerosis and some types of frontotemporal lobar degeneration. The importance of TDP-43 in disease is underscored by the fact that dominant missense mutations are sufficient to cause disease, although the role of TDP-43 in pathogenesis is unknown. Here we show that TDP-43 forms cytoplasmic mRNP granules that undergo bidirectional, microtubule-dependent transport in neurons in vitro and in vivo and facilitate delivery of target mRNA to distal neuronal compartments. TDP-43 mutations impair this mRNA transport function in vivo and in vitro, including in stem cell-derived motor neurons from ALS patients bearing any one of three different TDP-43 ALS-causing mutations. Thus, TDP-43 mutations that cause ALS lead to partial loss of a novel cytoplasmic function of TDP-43.
Original language | English |
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Pages (from-to) | 536-543 |
Number of pages | 8 |
Journal | Neuron |
Volume | 81 |
Issue number | 3 |
DOIs | |
Publication status | Published - 5 Feb 2014 |
Keywords / Materials (for Non-textual outputs)
- AMYOTROPHIC-LATERAL-SCLEROSIS
- PLURIPOTENT STEM-CELLS
- MOTOR-NEURONS
- LIVING CELLS
- PROTEIN
- FUS/TLS
- NEURODEGENERATION
- VULNERABILITY
- TRANSLATION
- STABILITY
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Siddharthan Chandran
- Deanery of Clinical Sciences - MacDonald Chair of Neurology
- Centre for Clinical Brain Sciences
- Euan MacDonald Centre for Motor Neuron Disease Research
- Centre for Regenerative Medicine
- Anne Rowling Regenerative Neurology Clinic
- Edinburgh Neuroscience
- Edinburgh Imaging
Person: Academic: Research Active