Skip to main content

Advertisement

Log in

Increased Fibronectin Impairs the Function of Excitatory/Inhibitory Synapses in Hirschsprung Disease

  • Original Research
  • Published:
Cellular and Molecular Neurobiology Aims and scope Submit manuscript

Abstract

Although approximately 50% of cases have a known genetic defect, the precise pathogenesis of Hirschsprung disease (HSCR) is still unclear. We recently reported that expression of fibronectin (FN), which is involved in the migration, colonization, and differentiation of enteric neural crest cells (ENCCs), is increased in aganglionic colonic segments obtained from patients. We hypothesized that abnormally high levels of FN might play a role in the etiology of HSCR. Here, to test this hypothesis, we investigated aganglionic, transitional, and ganglionic colon segments from 63 children with HSCR and distal colon from thirty healthy Wistar rats at embryonic day 20, in addition to in vitro studies with PC12 Adh neural crest cells. We measured the protein and mRNA expression levels of FN, together with a panel of excitatory (VGLUT1, GluA1, GluN1, PSD-95, and NL-1) and inhibitory (GAD67, GABA AR-α1, NL-2, and SLC32) synaptic markers. Expression of all these synaptic markers was significantly decreased in aganglionic colon, compared to ganglionic colon, whereas expression of FN was significantly increased. In a neural crest cell line, PC12 Adh, knockdown of FN with small-interfering RNA increased the expression of synaptic markers. Co-culture of colons from embryonic day 20 rats with RGD recombinant protein, which contains the RGD motif of FN, reduced the expression of excitatory and inhibitory synaptic markers. These results are consistent with the idea that the etiology of HSCR involves aberrant overexpression of FN, which may impair synaptic function and enteric nervous system development, leading to motor dysfunction of intestinal muscles.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

Download references

Funding

This work was funded by the National Natural Science Foundation of China (Projects Nos. 81471487, 81701492 and 81270720).

Author information

Authors and Affiliations

Authors

Contributions

Ni Gao, conceived project, design, and execution of most experiments, data acquisition and analysis, writing—original draft, review, and editing; Peimin Hou, data acquisition and analysis, writing; Jian Wang and Tingting Zhou, data acquisition and analysis; Dongming Wang and Qiangye Zhang, data acquisition and analysis; Weijing Mu, writing—review and editing; Xiaona Lv and Aiwu Li, conceived project, resources, supervision, funding acquisition, writing—review and editing.

Corresponding authors

Correspondence to Xiaona Lv or Aiwu Li.

Ethics declarations

Conflict of interests

None declared.

Ethical Approval

Our study was approved by the Ethics Committee of Qilu Hospital, Shandong University. All procedures involving animals were conducted in accordance with the ethical standards of the institution.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Gao, N., Hou, P., Wang, J. et al. Increased Fibronectin Impairs the Function of Excitatory/Inhibitory Synapses in Hirschsprung Disease. Cell Mol Neurobiol 40, 617–628 (2020). https://doi.org/10.1007/s10571-019-00759-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10571-019-00759-4

Keywords

Navigation