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The toxicity of ribbon worms: alpha-nemertides or tetrodotoxin, or both?
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för kemi och biomedicin (KOB). (Linnaeus Ctr Biomat Chem, BMC)ORCID-id: 0000-0003-1241-8888
Uppsala University. (Department of Pharmacognosy)
Uppsala University. (Department of Pharmacognosy)
Lund University. (Department of Biotechnology)
Vise andre og tillknytning
2016 (engelsk)Inngår i: Planta Medica, ISSN 0032-0943, E-ISSN 1439-0221, Vol. 82, nr Supplement 1, artikkel-id P549Artikkel i tidsskrift, Meeting abstract (Annet vitenskapelig) Published
Abstract [en]

The marine ribbon worms (nemerteans) are predators which capture their prey by everting a proboscis carrying a mixture of toxins which brings on rapid paralysis [1]. Moreover, ribbon worms have a thick layer of epidermal mucus of similar constitution. Tetrodotoxin (TTX) has been identified as one of these toxins [2]. The extreme toxicity of TTX (lethal by ingestion of 0.5-2 mg) is due to its ability to block voltage-gated sodium channels. Although several bacterial species (among these Vibrio sp.) have been linked to its synthesis, the biogenic origin and biosynthesis is unclear. One hypothesis is that TTX production occurs in a symbiotic relationship with its host, in this case the ribbon worm [3]. We have made significant effort to identify TTX in a setup for production through the cultivation of Vibrio alginolyticus in nutrient broth infused with mucus from the ribbon worm Lineus longissimus. Toxicity was demonstrated by fraction injections into shore crabs, but no TTX was found, and it could be shown conclusively that toxicity was unrelated to TTX and the Vibrio culture itself, and rather a constituent of the ribbon worm mucus [4]. The following studies led us to the discovery of a new class of peptides, the alpha-nemertides, in the mucus of the ribbon worms, which could be directly linked to the toxic effects. A literature review of the available evidence for TTX in ribbon worms show that the evidence in most cases are indirect, although notable exceptions exist. This points to the necessity to further investigate the presence and roles of TTX and alpha-nemertides in ribbon worms.

sted, utgiver, år, opplag, sider
2016. Vol. 82, nr Supplement 1, artikkel-id P549
HSV kategori
Forskningsprogram
Kemi, Medicinsk kemi
Identifikatorer
URN: urn:nbn:se:lnu:diva-56306DOI: 10.1055/s-0036-1596617ISI: 000411789300441OAI: oai:DiVA.org:lnu-56306DiVA, id: diva2:957618
Konferanse
Joint Natural Products Conference, July 25-27, Copenhagen, Denmark
Forskningsfinansiär
Swedish Research CouncilThe Crafoord FoundationTilgjengelig fra: 2016-09-02 Laget: 2016-09-02 Sist oppdatert: 2020-01-28bibliografisk kontrollert

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