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Title: Multiplex PCR for detection of microcystins-producing cyanobacteria from freshwater samples
Author: Valério, Elisabete
Chambel, Lélia
Paulino, Sérgio
Faria, Natália
Pereira, Paulo
Tenreiro, Rogério
Keywords: Cyanobacteria
Multiplex PCR
Environmental samples
Água e Solo
Issue Date: Jun-2010
Publisher: Wiley-Blackwell
Citation: Environ Toxicol. 2010 Jun;25(3):251-60. Epub 2009 Jun 1
Abstract: The aim of this study was to develop a PCR-based method of gene-directed multiplex PCR to rapidly identify microcystins producing cyanobacteria, regardless of their taxa, that could be applied in routine freshwater monitoring. Instead of using the amplification of only one or two mcy gene fragments, a multiplex PCR that simultaneously amplifies mcyA-cd, mcyAB, and mcyB fragments of the microcystin gene cluster was validated with DNA from 124 cyanobacterial isolates and applied in 37 environmental samples. The toxicological status of the isolates was assessed by high-performance liquid chromatography also used as the "gold standard" for the evaluation of multiplex mcy genes-based PCR, where a sensitivity of 92.3% and a specificity of 100% have been obtained. For the environmental samples, a rapid protocol for their direct use in the PCR reaction has been developed and, by using ELISA results as "gold standard" for the presence of microcystins in these samples, a sensitivity of 80% and a specificity of 100% were achieved, showing that this multiplex PCR test is a rapid, reliable, and economical way of assessing the microcystin-producing potential of cyanobacteria in freshwaters, regardless of their taxa or microcystins variant produced.
Peer review: yes
ISSN: 1520-4081
Publisher Version:
Appears in Collections:DSA - Artigos em revistas internacionais

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