Altered mRNA transport and local translation in i3Neurons with RNA-binding protein knockdown

被引：0

作者：

Dargan, Rachael ^{[1
]}

Mikheenko, Alla ^{[2
]}

Johnson, Nicholas L. ^{[1
,3
]}

Packer, Benjamin E. ^{[1
]}

Li, Ziyi ^{[1
,3
]}

Craig, Emma J. ^{[1
]}

Como, Christina N. ^{[3
]}

Sarbanes, Stephanie L. ^{[4
]}

Bereda, Colleen ^{[1
]}

Hao, Ying ^{[1
]}

Mehta, Puja R. ^{[2
]}

Keuss, Matthew ^{[2
]}

Nalls, Mike A. ^{[1
,3
]}

Qi, Yue A. ^{[1
]}

Weller, Cory A. ^{[1
,3
]}

Fratta, Pietro ^{[2
,5
]}

Ryan, Veronica H. ^{[1
]}

机构：

[1] NIH, Natl Inst Aging, Ctr Alzheimers & Related Dementias, Bethesda, MD 20892 USA

[2] UCL, UCL Queen Sq Inst Neurol, UCL Queen Sq Motor Neuron Dis Ctr, Dept Neuromuscular Dis, London WC1N 3BG, England

[3] DataTecnica, Washington, DC 20812 USA

[4] NIH, Natl Inst Neurol Disorders & Stroke, Bethesda, MD 20892 USA

[5] Francis Crick Inst, London NW1 1AT, England

来源：

NUCLEIC ACIDS RESEARCH | 2025年 / 53卷 / 14期

关键词：

TDP-43; EXPRESSION; DYNAMICS; ALS; LOCALIZATION; TRANSCRIPTOME; MUTATIONS; PACKAGE; NEURONS; HNRNPA1;

D O I：

10.1093/nar/gkaf709

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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.

引用

页数：21

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