Cited by 203Neurogenetic and Muscular Disorders ResearchAmyotrophic Lateral Sclerosis ResearchHereditary Neurological Disorders

Interaction of survival of motor neuron (SMN) and HuD proteins with mRNA cpg15 rescues motor neuron axonal deficits

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Akten, Bikem, Kye, Min Jeong, Hao, Le T., Wertz, Mary H., Singh, Sasha, Nie, Duyu, Huang, Jia, Merianda, Tanuja T. +4 more·2011·Proceedings of the National Academy of Sciences

Abstract

Spinal muscular atrophy (SMA), caused by the deletion of the SMN1 gene, is the leading genetic cause of infant mortality. SMN protein is present at high levels in both axons and growth cones, and loss of its function disrupts axonal extension and pathfinding. SMN is known to associate with the RNA-binding protein hnRNP-R, and together they are responsible for the transport and/or local translation of β-actin mRNA in the growth cones of motor neurons. However, the full complement of SMN-interacting proteins in neurons remains unknown. Here we used mass spectrometry to identify HuD as a novel neuronal SMN-interacting partner. HuD is a neuron-specific RNA-binding protein that interacts with mRNAs, including candidate plasticity-related gene 15 (cpg15). We show that SMN and HuD form a complex in spinal motor axons, and that both interact with cpg15 mRNA in neurons. CPG15 is highly expressed in the developing ventral spinal cord and can promote motor axon branching and neuromuscular synapse formation, suggesting a crucial role in the development of motor axons and neuromuscular junctions. Cpg15 mRNA previously has been shown to localize into axonal processes. Here we show that SMN deficiency reduces cpg15 mRNA levels in neurons, and, more importantly, cpg15 overexpression partially rescues the SMN-deficiency phenotype in zebrafish. Our results provide insight into the function of SMN protein in axons and also identify potential targets for the study of mechanisms that lead to the SMA pathology and related neuromuscular diseases.

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  • Overexpression of HuD or of one of its target mRNAs (cpg-15) partially rescues SMA-like defects related to cell morphology and recruitment of specific mRNAs into RNA granules.

    “Importantly, overexpression of HuD or of one of its target mRNAs (cpg-15) was found to partially rescue SMA-like defects related to cell morphology and recruitment of specific mRNAs into RNA granules (Hubers et al. 2010; Akten et al. 2011).”

    From Emerging complexity of the HuD/ELAVl4 gene; implications for neuronal development, function, and dysfunction (2013) · cites this paper as Akten et al. 2011

    The Results (page not specified) report that cpg15 mRNA overexpression partially rescued motor-axon defects in SMN-deficient zebrafish, supporting the morphology portion of the claim. The paper identifies HuD as an SMN-interacting protein but does not report rescue by HuD overexpression or rescue of mRNA recruitment into RNA granules. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • HuD interacts with SMN protein in axonal compartments of neurons.

    “A series of cell imaging and biochemical experiments in three independent studies demonstrated that HuD interacts with SMN protein in axonal compartments of neurons (Hubers et al. 2010; Akten et al. 2011; Fallini et al. 2011).”

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Authors
Akten, B., Kye, M. J., Hao, L. T., Wertz, M. H., Singh, S., Nie, D., Huang, J., Merianda, T. T., Twiss, J. L., Beattie, C. E., Steen, J. A. J., & Sahin, M.
Affiliations
  • Boston Children's Hospital (US)
  • The Ohio State University (US)
  • Drexel University (US)
  • The F.M. Kirby Neurobiology Center, Department of Neurology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115;
Venue
Proceedings of the National Academy of Sciences
Published
2011-06-07
Volume
108
Issue
25
Pages
10337-10342
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2013174632
Cited by
203
References
36
Citations by year
2026: 7 · 2025: 4 · 2024: 4 · 2023: 11 · 2022: 12 · 2021: 15 · 2020: 18 · 2019: 8 · 2018: 13 · 2017: 21 · 2016: 18 · 2015: 13 · 2014: 21 · 2013: 22 · 2012: 12
FWCI
9.58
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Spinal Muscular Atrophy Foundation
  • Hearst Foundations
  • Harvard NeuroDiscovery Center
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (NS050414, R01 NS66973, NS 041596, R01NS050414, R01NS066973, R56NS050414, R01NS041596)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P30HD018655, P30HD-18655)
Topics
  • Health Sciences › Medicine › Genetics › Neurogenetic and Muscular Disorders Research
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
Keywords
spinal muscular atrophy, SMN protein, HUD, RNA-binding proteins, motor neuron axons, axon branching, neuromuscular synapse formation
MeSH terms
ELAV-Like Protein 4, Animals, Axons, Cells, Cultured, Embryo, Mammalian, Humans, Motor Neurons, Nerve Tissue Proteins, Neuropeptides, Recombinant Fusion Proteins, RNA, Messenger, Zebrafish, Animals, Genetically Modified, Mice, ELAV Proteins, Survival of Motor Neuron 1 Protein, GPI-Linked Proteins

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