Article (Scientific journals)
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 A et al.
2018In Toxins, 10 (147), p. 1-15
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Keywords :
cyanobacterium; cyanotoxins; Svalbard; LC-Ms precursor ion screening; microcystins; Adda-ELISA
Abstract :
[en] 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
Research center :
CIP - Centre d'Ingénierie des Protéines - ULiège
Disciplines :
Biochemistry, biophysics & molecular biology
Microbiology
Environmental sciences & ecology
Author, co-author :
Kleinteich, Julia
Puddick, Jonathan
Wood, Susanna A
Hildebrand, Falk
Laughinghouse IV, Haywood ;  Université de Liège - ULiège > Département des sciences de la vie > Physiologie et génétique bactériennes
Pearce, David A
Dietrich, Daniel R
Wilmotte, Annick  ;  Université de Liège - ULiège > Département des sciences de la vie > Physiologie et génétique bactériennes
Language :
English
Title :
Toxic Cyanobacteria in Svalbard: Chemical Diversity of Microcystins Detected Using a Liquid Chromatography Mass Spectrometry Precursor Ion Screening Method
Alternative titles :
[fr] Les cyanobactéries toxiques à Svalbard: diversité chimique des microcystines détectée en utilisant une méthode d'ion précurseur en chromatographie à phase liquide
Publication date :
2018
Journal title :
Toxins
eISSN :
2072-6651
Publisher :
MDPI, Basel, Switzerland
Volume :
10
Issue :
147
Pages :
1-15
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
FP7 - 246565 - UNITE - UPM - Marie Curie International Mobility Programme
Name of the research project :
Marie Curie COFUND funded post-doctoral position at the University of Liège, Belgium.
Funders :
DG RDT - Commission Européenne. Direction Générale de la Recherche et de l'Innovation [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
CE - Commission Européenne [BE]
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