AI Article Synopsis
- Cyanotoxins, toxic compounds from cyanobacteria, exist in extreme environments like polar deserts, alkaline lakes, and hot springs, extending beyond their known presence in temperate freshwater.
- The review highlights various cyanotoxins detected in these habitats, including neurotoxins and hepatotoxins, with microcystins being the most common.
- It emphasizes important knowledge gaps in research, such as limited culture confirmations and lack of -omics data, which are critical for assessing ecological and human health risks in these unique ecosystems.
Article Abstract
Cyanotoxins are secondary metabolites produced by cyanobacteria, of varied chemical nature and toxic effects. Although cyanobacteria thrive in all kinds of ecosystems on Earth even under very harsh conditions, current knowledge on cyanotoxin distribution is almost restricted to freshwaters from temperate latitudes. In this review, we bring to the forefront the presence of cyanotoxins in extreme environments. Cyanotoxins have been reported especially in polar deserts (both from the Arctic and Antarctica) and alkaline lakes, but also in hot deserts, hypersaline environments, and hot springs. Cyanotoxins detected in these ecosystems include neurotoxins-anatoxin-a, anatoxin-a (S), paralytic shellfish toxins, β-methylaminopropionic acid, -(2-aminoethyl) glycine and 2,4-diaminobutyric acid- and hepatotoxins -cylindrospermopsins, microcystins and nodularins-with microcystins being the most frequently reported. Toxin production there has been linked to at least eleven cyanobacterial genera yet only three of these (, and ) have been confirmed as producers in culture. Beyond a comprehensive analysis of cyanotoxin presence in each of the extreme environments, this review also identifies the main knowledge gaps to overcome (e.g., scarcity of isolates and -omics data, among others) toward an initial assessment of ecological and human health risks in these amazing ecosystems developing at the very edge of life.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5532675 | PMC |
| http://dx.doi.org/10.3390/md15070233 | DOI Listing |
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