Cyanobacterial Toxin

10.5580/2ac0 ◽  
2012 ◽  
Vol 8 (2) ◽  
Keyword(s):  
Cyanobacterial Toxin

Cross-reactivity and performance assessment of four microcystin immunoassays with detoxication products of the cyanobacterial toxin, microcystin-LR

2002 ◽  
Vol 51 (3) ◽  
pp. 145-151 ◽  
Author(s):  
J. S. Metcalf ◽  
K. A. Beattie ◽  
J. Ressler ◽  
S. Gerbersdorf ◽  
S. Pflugmacher ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Cross Reactivity ◽  
Cyanobacterial Toxin ◽  
And Performance

scholarly journals Harmful phytoplankton blooms and fish mortality in a eutrophicated reservoir of northeast Brazil

2008 ◽  
Vol 51 (4) ◽  
pp. 633-641 ◽  
Author(s):  
Naithirithi Tiruvenkatachary Chellappa ◽  
Sarah Laxhmi Chellappa ◽  
Sathyabama Chellappa
Keyword(s):  
Cyanobacterial Bloom ◽  
Hplc Method ◽  
Freshwater Ecosystems ◽  
Cyanobacterial Blooms ◽  
Fish Mortality ◽  
Cylindrospermopsis Raciborskii ◽  
Northeast Brazil ◽  
Cyanobacterial Toxin ◽  
Bloom Formation ◽  
Harmful Effects

The aim of this work was to study the eutrophication in the tropical freshwater ecosystems and the consequent cyanobacterial bloom formation and economical damage to fisheries and harmful effects to public health. Mass fish mortality due to toxin producing cyanobacterial blooms was registered during December 2003 in Marechal Dutra Reservoir, Acari/RN, Northeast Brazil. Phytoplankton and fish samplings were carried out on alternate days during the episode of fish mortality and monthly during January to June 2004. The cyanobacterial toxin was identified and quantified from the seston samples and liver of the dead fishes using the standard HPLC method. The results indicated that the toxic blooms of Cylindrospermopsis raciborskii and Microcystis aeruginosa were persistent for two weeks and represented 90% of the phytoplankton species assemblages. The lethally affected fishes were Oreochromis niloticus, Plagioscion squamosissimus, Cichla monoculus, Prochilodus brevis, Hoplias malabaricus and Leporinus friderici. The microcystin levels varied from 0.07 to 8.73µg L-1 the seston samples and from 0.01 to 2.59µg g-1in the liver samples of the fishes during the bloom period.

The effects of a cyanobacterial crude extract on different aquatic organisms: Evidence for cyanobacterial toxin modulating factors

2001 ◽  
Vol 16 (6) ◽  
pp. 535-542 ◽  
Author(s):  
Constanze Pietsch ◽  
Claudia Wiegand ◽  
M. Valeria Amé ◽  
Andreas Nicklisch ◽  
Daniel Wunderlin ◽  
...  
Keyword(s):  
Crude Extract ◽  
Aquatic Organisms ◽  
Cyanobacterial Toxin

scholarly journals PARP1 Is Up-Regulated in Non-small Cell Lung Cancer Tissues in the Presence of the Cyanobacterial Toxin Microcystin

2018 ◽  
Vol 9 ◽  
Author(s):  
Patrick L. Apopa ◽  
Lisa Alley ◽  
Rosalind B. Penney ◽  
Konstantinos Arnaoutakis ◽  
Mathew A. Steliga ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Small Cell ◽  
Small Cell Lung ◽  
Cyanobacterial Toxin ◽  
Cancer Tissues

scholarly journals Cyanobacterial Toxin Degrading Bacteria: Who Are They?

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Konstantinos Ar. Kormas ◽  
Despoina S. Lymperopoulou
Keyword(s):  
Meta Analysis ◽  
Toxin Production ◽  
Cyanobacterial Blooms ◽  
Ecological Knowledge ◽  
Cyanobacterial Toxin ◽  
Molecular Approaches ◽  
Degrading Bacteria ◽  
Ecological Problems ◽  
Ecosystem Level ◽  
Toxin Degradation

Cyanobacteria are ubiquitous in nature and are both beneficial and detrimental to humans. Benefits include being food supplements and producing bioactive compounds, like antimicrobial and anticancer substances, while their detrimental effects are evident by toxin production, causing major ecological problems at the ecosystem level. To date, there are several ways to degrade or transform these toxins by chemical methods, while the biodegradation of these compounds is understudied. In this paper, we present a meta-analysis of the currently available 16S rRNA andmlrA(microcystinase) genes diversity of isolates known to degrade cyanobacterial toxins. The available data revealed that these bacteria belong primarily to the Proteobacteria, with several strains from the sphingomonads, and one from each of theMethylobacillusandPaucibactergenera. Other strains belonged to the generaArthrobacter, Bacillus, andLactobacillus. By combining the ecological knowledge on the distribution, abundance, and ecophysiology of the bacteria that cooccur with toxic cyanobacterial blooms and newly developed molecular approaches, it is possible not only to discover more strains with cyanobacterial toxin degradation abilities, but also to reveal the genes associated with the degradation of these toxins.

scholarly journals Toxicity and recovery in the pregnant mouse after gestational exposure to the cyanobacterial toxin, cylindrospermopsin

2010 ◽  
Vol 31 (3) ◽  
pp. 242-254 ◽  
Author(s):  
N. Chernoff ◽  
E. H. Rogers ◽  
R. D. Zehr ◽  
M. I. Gage ◽  
D. E. Malarkey ◽  
...  
Keyword(s):  
Pregnant Mouse ◽  
Cyanobacterial Toxin ◽  
Gestational Exposure

Degradation of natural toxins by phthalocyanines–example of cyanobacterial toxin, microcystin

2010 ◽  
Vol 62 (2) ◽  
pp. 273-278 ◽  
Author(s):  
Daniel Jančula ◽  
Lucie Bláhová ◽  
Marie Karásková ◽  
Blahoslav Maršálek
Keyword(s):  
Reactive Oxygen Species ◽  
Hydrogen Peroxide ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Oxygen Species ◽  
Cyanobacterial Toxin ◽  
Natural Toxins ◽  
Peptide Toxins ◽  
Near Future ◽  
Absorption Characteristics

Phthalocyanines (Pcs) are promising photosensitizers for use in various branches of science and industry. In the presence of visible light and diatomic oxygen, phthalocyanines can react to produce singlet oxygen, a member of reactive oxygen species able to damage different molecules and tissues. The aim of this study was to investigate the ability of phthalocyanines to degrade natural toxins in the presence of visible light. As the representative of hardly degradable toxins, a group of cyanobacterial peptide toxins—microcystin-LR—was chosen for this study. According to our results, phthalocyanines are able to degrade 61,5% of microcystins within a 48-hour incubation (38% of microcystins was degraded after 24 h and 24% after 12 h of incubation). Although other oxidants like hydrogen peroxide or ozone are able to degrade microcystins within several hours, we assume that by optimizing the spectrum emitted by light source and by changing the absorption characteristics of Pcs, microcystins degradation by phthalocyanines could be more effective in the near future.

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