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Firing the Sting: Chemically Induced Discharge of Cnidae Reveals Novel Proteins and Peptides from Box Jellyfish (Chironex fleckeri) Venom

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Jouiaei, Mahdokht, Casewell, Nicholas ORCID: https://orcid.org/0000-0002-8035-4719, Yanagihara, Angel, Nouwens, Amanda, Cribb, Bronwen, Whitehead, Darryl, Jackson, Timothy, Ali, Syed, Wagstaff, Simon ORCID: https://orcid.org/0000-0003-0577-5537, Koludarov, Ivan, Alewood, Paul, Hansen, Jay and Fry, Bryan (2015) 'Firing the Sting: Chemically Induced Discharge of Cnidae Reveals Novel Proteins and Peptides from Box Jellyfish (Chironex fleckeri) Venom'. Toxins, Vol 7, Issue 3, pp. 936-950.

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Abstract

Cnidarian venom research has lagged behind other toxinological fields due to technical difficulties in recovery of the complex venom from the microscopic nematocysts. Here we report a newly developed rapid, repeatable and cost effective technique of venom preparation, using ethanol to induce nematocyst discharge and to recover venom contents in one step. Our model species was the Australian box jellyfish (Chironex fleckeri), which has a notable impact on public health. By utilizing scanning electron microscopy and light microscopy, we examined nematocyst external morphology before and after ethanol treatment and verified nematocyst discharge. Further, to investigate nematocyst content or “venom” recovery, we utilized both top-down and bottom-up transcriptomics–proteomics approaches and compared the proteome profile of this new ethanol recovery based method to a previously reported high activity and recovery protocol, based upon density purified intact cnidae and pressure induced disruption. In addition to recovering previously characterized box jellyfish toxins, including CfTX-A/B and CfTX-1, we recovered putative metalloproteases and novel expression of a small serine protease inhibitor. This study not only reveals a much more complex toxin profile of Australian box jellyfish venom but also suggests that ethanol extraction method could augment future cnidarian venom proteomics research efforts.

Item Type: Article
Additional Information: This article belongs to the Special Issue Selected Papers from the 5th Venoms to Drugs Meeting
Subjects: QU Biochemistry > Genetics > QU 460 Genomics. Proteomics
QU Biochemistry > Proteins. Amino Acids. Peptides > QU 55 Proteins
QV Pharmacology > Toxicology > General Toxicology > QV 600 General works
WD Disorders of Systemic, Metabolic or Environmental Origin, etc > Animal Poisons > WD 405 Marine forms
Faculty: Department: Biological Sciences > Department of Tropical Disease Biology
Digital Object Identifer (DOI): https://doi.org/10.3390/toxins7030936
Depositing User: Lynn Roberts-Maloney
Date Deposited: 10 Jul 2015 09:28
Last Modified: 06 Feb 2018 13:10
URI: http://archive.lstmed.ac.uk/id/eprint/5238

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