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Archives of Toxicology

, Volume 93, Issue 1, pp 189–206 | Cite as

Novel neurotoxic peptides from Protopalythoa variabilis virtually interact with voltage-gated sodium channel and display anti-epilepsy and neuroprotective activities in zebrafish

  • Qiwen Liao
  • Shengnan Li
  • Shirley Weng In Siu
  • Jean-Étienne R. L. Morlighem
  • Clarence Tsun Ting Wong
  • Xiufen Wang
  • Gandhi Rádis-BaptistaEmail author
  • Simon Ming-Yuen LeeEmail author
Biologics

Abstract

We previously reported a novel toxic peptide identified from the anthozoan Protopalythoa variabilis transcriptome which is homologous to a novel structural type of sodium channel toxin isolated from a parental species (Palythoa caribaeorum). The peptide was named, according to its homologous, as Pp V-shape α-helical peptide (PpVα) in the present study. Through molecular docking and dynamics simulation, linear and hairpin folded PpVα peptides were shown to be potential voltage-gated sodium channel blockers. Nowadays, sodium channel blockers have been the mainstream of the pharmacological management of epileptic seizures. Also, sodium channel blockers could promote neuronal survival by reducing sodium influx and reducing the likelihood of calcium importation resulting in suppressing microglial activation and protecting dopaminergic neurons from degeneration. The folded PpVα peptide could decrease pentylenetetrazol (PTZ)-induced c-fos and npas4a expression level leading to reverse PTZ-induced locomotor hyperactivity in zebrafish model. In vitro, the folded PpVα peptide protected PC12 cells against 6-hydroxydopamine (6-OHDA)-induced neurotoxicity via activating heme oxygenase-1 (HO-1) and attenuating inducible nitric oxide synthase (iNOS) expression. In vivo, PpVα peptide suppressed the 6-OHDA-induced neurotoxicity on the locomotive behavior of zebrafish and, importantly, prevented the 6-OHDA-induced excessive ROS generation and subsequent dopaminergic neurons loss. This study indicates that the single S–S bond folded PpVα peptide arises as a new structural template to develop sodium channel blockers and provides an insight on the peptide discovery from cnidarian transcriptome to potentially manage epilepsy and neurodegenerative disorders.

Keywords

Neuroactive peptides Voltage-gated sodium ion channel blocker Protein docking Anti-epilepsy Neuroprotection Disulfide bond 

Notes

Acknowledgements

Research at University of Macau was supported by grants from the Science and Technology Development Fund (FDCT) of Macao SAR (Ref. no. 069/2015/A2 and no. 134/2014/A3) and Research Committee, University of Macau (MYRG2016-00133-ICMS-QRCM, MYRG2015-00182-ICMS-QRCM, and MYRG2016-00129-ICMS-QRCM). Research work at the Institute for Marine Sciences, Federal University of Ceará, was supported by the Brazilian National Council for Scientific and Technological Development—CNPq, under the auspices of the Marine Biotechnology Network Initiative (Grant no. 408835/2013-3 to G.R.-B.), the Ministry of Science, Technology, Innovation & Communication (MCTI-C) of the Federal Government of Brazil. J.-E.RLM was a former doctoral fellowship recipient from the Coordination for the improvement of Higher Education Personnel (CAPES, the Ministry of Education, Brazil).

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

Supplementary material

204_2018_2334_MOESM1_ESM.docx (980 kb)
Supplementary material 1 (DOCX 979 KB)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Qiwen Liao
    • 1
  • Shengnan Li
    • 1
  • Shirley Weng In Siu
    • 2
  • Jean-Étienne R. L. Morlighem
    • 3
  • Clarence Tsun Ting Wong
    • 4
  • Xiufen Wang
    • 1
  • Gandhi Rádis-Baptista
    • 3
    Email author
  • Simon Ming-Yuen Lee
    • 1
    Email author
  1. 1.State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical SciencesUniversity of MacauMacauChina
  2. 2.Department of Computer and Information Science, Faculty of Science and TechnologyUniversity of MacauMacauChina
  3. 3.Laboratory of Biochemistry and Biotechnology, Institute for Marine SciencesFederal University of CearáFortalezaBrazil
  4. 4.Department of ChemistryThe Chinese University of Hong KongShatinChina

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