Toxic cyanobacteria in Svalbard: chemical diversity of microcystins detected using a liquid chromatography mass spectrometry precursor ion screening method
Kleinteich, Julia; Puddick, Jonathan; Wood, Susanna; Hildebrand, Falk; Laughinghouse IV, H.; Pearce, David ORCID: https://orcid.org/0000-0001-5292-4596; Dietrich, Daniel; Wilmotte, Annick. 2018 Toxic cyanobacteria in Svalbard: chemical diversity of microcystins detected using a liquid chromatography mass spectrometry precursor ion screening method. Toxins, 10 (4), 147. 15, pp. 10.3390/toxins10040147
Before downloading, please read NORA policies.Preview |
Text
toxins-10-00147-v2.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (1MB) | Preview |
Abstract/Summary
Cyanobacteria synthesize a large variety of secondary metabolites including toxins. Microcystins (MCs) with hepato- and neurotoxic potential are well studied in bloom-forming planktonic species of temperate and tropical regions. Cyanobacterial biofilms thriving in the polar regions have recently emerged as a rich source for cyanobacterial secondary metabolites including previously undescribed congeners of microcystin. However, detection and detailed identification of these compounds is difficult due to unusual sample matrices and structural congeners produced. We here report a time-efficient liquid chromatography-mass spectrometry (LC-MS) precursor ion screening method that facilitates microcystin detection and identification. We applied this method to detect six different MC congeners in 8 out of 26 microbial mat samples of the Svalbard Archipelago in the Arctic. The congeners, of which [Asp3, ADMAdda5, Dhb7] MC-LR was most abundant, were similar to those reported in other polar habitats. Microcystins were also determined using an Adda-specific enzyme-linked immunosorbent assay (Adda-ELISA). Nostoc sp. was identified as a putative toxin producer using molecular methods that targeted 16S rRNA genes and genes involved in microcystin production. The mcy genes detected showed highest similarities to other Arctic or Antarctic sequences. The LC-MS precursor ion screening method could be useful for microcystin detection in unusual matrices such as benthic biofilms or lichen
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | 10.3390/toxins10040147 |
ISSN: | 2072-6651 |
Additional Keywords: | Arctic, benthic mats, cyanotoxins, ELISA, 16S rRNA gene |
Date made live: | 10 Apr 2018 08:31 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/519781 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year