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The conserved microRNA miR-34 regulates synaptogenesis via coordination of distinct mechanisms in presynaptic and postsynaptic cells
Abstract
Micro(mi)RNA-based post-transcriptional regulatory mechanisms have been broadly implicated in the assembly and modulation of synaptic connections required to shape neural circuits, however, relatively few specific miRNAs have been identified that control synapse formation. Using a conditional transgenic toolkit for competitive inhibition of miRNA function in Drosophila, we performed an unbiased screen for novel regulators of synapse morphogenesis at the larval neuromuscular junction (NMJ). From a set of ten new validated regulators of NMJ growth, we discovered that miR-34 mutants display synaptic phenotypes and cell type-specific functions suggesting distinct downstream mechanisms in the presynaptic and postsynaptic compartments. A search for conserved downstream targets for miR-34 identified the junctional receptor CNTNAP4/Neurexin-IV (Nrx-IV) and the membrane cytoskeletal effector Adducin/Hu-li tai shao (Hts) as proteins whose synaptic expression is restricted by miR-34. Manipulation of miR-34, Nrx-IV or Hts-M function in motor neurons or muscle supports a model where presynaptic miR-34 inhibits Nrx-IV to influence active zone formation, whereas, postsynaptic miR-34 inhibits Hts to regulate the initiation of bouton formation from presynaptic terminals.
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At the Drosophila neuromuscular junction, miR-34 controls synaptogenesis by regulating distinct pre- and postsynaptic genes.
“as well as from the Drosophila neuromuscular junction, where miR‐34 controls synaptogenesis by regulating distinct pre‐ and postsynaptic genes (McNeill et al., 2020).”
From MicroRNA‐138‐5p suppresses excitatory synaptic strength at the cerebellar input layer (2025) · cites this paper as McNeill et al., 2020
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Most Caenorhabditis elegans microRNAs Are Individually Not Essential for Development or Viability
Miska, E. A., Alvarez-Saavedra, E., Abbott, A. L., Lau, N. C., Hellman, A. B., McGonagle, S. M., Bartel, D. P., Ambros, V. R., & Horvitz, H. R. (2007) · PLoS Genetics · doi:10.1371/journal.pgen.0030215 · Cited by 484
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Somel, M., Liu, X., Tang, L., Yan, Z., Hu, H., Guo, S., Jiang, X., Zhang, X., Xu, G., Xie, G., et al. (2011) · PLoS Biology · doi:10.1371/journal.pbio.1001214 · Cited by 232
Cntnap4 differentially contributes to GABAergic and dopaminergic synaptic transmission
Karayannis, T., Au, E., Patel, J. C., Kruglikov, I., Markx, S., Delorme, R., Héron, D., Salomon, D., Glessner, J., Restituito, S., et al. (2014) · Nature · doi:10.1038/nature13248 · Cited by 183
SynaptomeDB: an ontology-based knowledgebase for synaptic genes
Pirooznia, M., Wang, T., Avramopoulos, D., Valle, D., Thomas, G., Huganir, R. L., Goes, F. S., Potash, J. B., & Zandi, P. P. (2012) · Bioinformatics · doi:10.1093/bioinformatics/bts040 · Cited by 125
Ral mediates activity‐dependent growth of postsynaptic membranes via recruitment of the exocyst
Teodoro, R. O., Pekkurnaz, G., Nasser, A., Higashi‐Kovtun, M. E., Balakireva, M., McLachlan, I. G., Camonis, J., & Schwarz, T. L. (2013) · The EMBO Journal · doi:10.1038/emboj.2013.147 · Cited by 61
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MicroRNA‐138‐5p suppresses excitatory synaptic strength at the cerebellar input layer
Delvendahl, I., Daswani, R., Winterer, J., Germain, P., Uhr, N. M., Schratt, G., & Müller, M. (2025) · The Journal of Physiology · doi:10.1113/jp288019 · Cited by 3
Metadata
- Authors
- McNeill, E. M., Warinner, C., Alkins, S., Taylor, A., Heggeness, H., DeLuca, T. F., Fulga, T. A., Wall, D. P., Griffith, L. C., & Van Vactor, D.
- Venue
- Nature Communications
- Published
- 2020-02-27
- Volume
- 11
- Issue
- 1
- ISSN
- 2041-1723
- PMC
- PMC7046720
- Cited by
- 51
- References
- 7
- Language
- en
- Funders
- U.S. Department of Health & Human Services | NIH | National Institute of Neurological Disorders and Stroke (NS090994, NS069695)
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