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DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway

  • Authors:
    • Jintao Du
    • Xianren Wang
    • Xiaobo Zhang
    • Xuemei Zhang
    • Hongyan Jiang
  • View Affiliations / Copyright

    Affiliations: Department of Otorhinolaryngology Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China, Department of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
    Copyright: © Du et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2357-2365
    |
    Published online on: November 20, 2017
       https://doi.org/10.3892/mmr.2017.8115
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Abstract

Abstract. The Delta/Notch‑like epidermal growth factor‑related receptor (DNER) serves an important role in the developing central nervous system. However, the actions of DNER in the development of the spiral ganglion in the inner ear have yet to be elucidated. Wild‑type C57BL/6 mice were housed and time‑mated for use in the present study. Primary neuronal cultures were prepared using spiral ganglion progenitors isolated from the modiolus of postnatal day 1 (P1) mice. DNER recombinant lentiviral vectors were constructed and transfected into the cultured primary neurons. The relative proportion of differentiated neurons and the length of their neurites were evaluated using microscopy. The results of the present study demonstrated that DNER was expressed in spiral ganglion neurons (SGNs) that exhibited significant polarity in the early differentiation stages; DNER expression gradually decreased until the polarity was lost on week 35. The in vitro expression of DNER was revealed to be similar to that in vivo. When DNER expression was silenced using RNA interference, the polarity of the differentiated neurons was altered and they exhibited significantly reduced dendritic length. In addition, the proportion of bipolar neurons was decreased compared with the control group. Furthermore, the expression of α‑synuclein and the GluR2/3 subunits of the α‑amin‑o‑3‑hydroxy‑5‑methyl‑4-isoxazolepropionic acid glutamate receptor were also reduced in cultured neurons in which DNER was silenced. Notch1 was co‑expressed with DNER in SGNs isolated from P1 mice. The indirect Notch inhibitor N-[N-(3,5-Difluorophenacetyl)-L-alanyl]‑S‑phenylglycine t‑butyl ester also affected the polarity and the formation of protrusions, and reduced the expression of DNER and glial fibrillary acidic protein in SGNs. In conclusion, the present study demonstrated that DNER was expressed in SGNs and appeared to be involved in the mechanisms underlying neuronal polarity and neuritogenesis, via a Notch‑dependent signaling pathway.
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Copy and paste a formatted citation
Spandidos Publications style
Du J, Wang X, Zhang X, Zhang X and Jiang H: DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway. Mol Med Rep 17: 2357-2365, 2018.
APA
Du, J., Wang, X., Zhang, X., Zhang, X., & Jiang, H. (2018). DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway. Molecular Medicine Reports, 17, 2357-2365. https://doi.org/10.3892/mmr.2017.8115
MLA
Du, J., Wang, X., Zhang, X., Zhang, X., Jiang, H."DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway". Molecular Medicine Reports 17.2 (2018): 2357-2365.
Chicago
Du, J., Wang, X., Zhang, X., Zhang, X., Jiang, H."DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway". Molecular Medicine Reports 17, no. 2 (2018): 2357-2365. https://doi.org/10.3892/mmr.2017.8115
Copy and paste a formatted citation
x
Spandidos Publications style
Du J, Wang X, Zhang X, Zhang X and Jiang H: DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway. Mol Med Rep 17: 2357-2365, 2018.
APA
Du, J., Wang, X., Zhang, X., Zhang, X., & Jiang, H. (2018). DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway. Molecular Medicine Reports, 17, 2357-2365. https://doi.org/10.3892/mmr.2017.8115
MLA
Du, J., Wang, X., Zhang, X., Zhang, X., Jiang, H."DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway". Molecular Medicine Reports 17.2 (2018): 2357-2365.
Chicago
Du, J., Wang, X., Zhang, X., Zhang, X., Jiang, H."DNER modulates the length, polarity and synaptogenesis of spiral ganglion neurons via the Notch signaling pathway". Molecular Medicine Reports 17, no. 2 (2018): 2357-2365. https://doi.org/10.3892/mmr.2017.8115
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