Altered mRNA transport and local translation in i3Neurons with RNA-binding protein knockdown
Neurons rely on messenger RNA (mRNA) transport and local translation to facilitate rapid protein synthesis in processes far from the cell body. These processes allow precise spatial and temporal control of translation and are mediated by RNA-binding proteins (RBPs), including those associated with neurodegenerative diseases. Here, we use proteomics, transcriptomics, and microscopy to investigate the impact of RBP depletion on mRNA transport and local translation in induced pluripotent stem cell-derived neurons. We find thousands of transcripts enriched in neurites and that many of these transcripts are locally translated, possibly due to the shorter length of transcripts in neurites. Loss of frontotemporal dementia/amyotrophic lateral sclerosis (FTD/ALS)-associated RBPs TDP-43 and hnRNPA1 induce distinct alterations in the neuritic proteome and transcriptome. TDP-43 knockdown (KD) leads to slightly increased neuritic mRNA and translation, while hnRNPA1 loss has more moderate effects on local mRNA profiles, possibly due to compensation by hnRNPA3. These results highlight the crucial role of FTD/ALS-associated RBPs in mRNA transport and local translation in neurons and the importance of these processes in neuron health and disease.
Authors
- Puja R. Mehta (ORCID: https://orcid.org/0000-0002-0255-407X)
- Veronica H. Ryan (ORCID: https://orcid.org/0000-0001-5121-4672)
- Christina N. Como (ORCID: https://orcid.org/0000-0002-8656-5760)
- Stephanie L. Sarbanes (ORCID: https://orcid.org/0000-0003-0051-8523)
- Colleen Bereda (ORCID: https://orcid.org/0000-0002-9435-6141)
- Nicholas L. Johnson (ORCID: https://orcid.org/0009-0004-1464-5050)
- Yue Qi (ORCID: https://orcid.org/0000-0003-1914-8710)
- Alla Mikheenko (ORCID: https://orcid.org/0000-0003-3400-9719)
- Matthew J. Keuss (ORCID: https://orcid.org/0000-0002-2628-4115)
- Cory A. Weller (ORCID: https://orcid.org/0000-0001-6965-5599)
- Ziyi Li (ORCID: https://orcid.org/0000-0002-5165-8772)
- Ying Hao (ORCID: https://orcid.org/0000-0001-5053-4850)
- Rachael Dargan
- Emma J. Craig
- Mike A. Nalls
- Benjamin Packer
Institutions
- Queen Mary University of London (GB)
- The Francis Crick Institute (GB)
- National Institute of Neurological Disorders and Stroke (US)
- All Russian Research Institute of Hydrometeorological information World Data Center (RU)
- Institute on Aging (US)
- National Institute on Aging (US)
- University College London (GB)
Publication Details
- Journal
- Nucleic Acids Research
- Published
- 2025-07-19
- DOI
- https://doi.org/10.1093/nar/gkaf709
- Citations
- 3
- Primary Topic
- Amyotrophic Lateral Sclerosis Research
- Type
- article
- Field-Weighted Citation Impact
- 4.17
Funders
- U.S. Department of Health and Human Services
- National Institutes of Health
- National Institute on Aging
- National Institute of General Medical Sciences
- National Institute of Neurological Disorders and Stroke