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Eliana Henao
Department of Biology, Universidad del Valle, Cali, Colombia

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Review article
Published: 26 March 2020 in Science of The Total Environment
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Colombia is the fourth contributor to the Amazon River Basin (ARB) by surface, and the third by mean annual runoff. The Yahuarcaca Lakes System (YLS), consisting of four large interconnected water bodies situated on the floodplain of Amazon River, was identified as one of the key areas for the conservation of freshwater biodiversity in the Colombian ARB. This review aimed to provide a general overview of YLS, present its environmental and biological features, identify main ecological and health threats, and propose mitigation strategies and future research prospects. A systematic search was performed using various databases. In summary, YLS harbors significant biodiversity and provides a number of ecological services for local communities, encompassing fish and drinking water supply and utilization of the floodplain for agriculture. Ensuring its sustainability requires attention from local and international authorities, collaboration with indigenous communities and future interdisciplinary research.

ACS Style

Eliana Henao; Jaime R. Cantera; Piotr Rzymski. Conserving the Amazon River Basin: The case study of the Yahuarcaca Lakes System in Colombia. Science of The Total Environment 2020, 724, 138186 .

AMA Style

Eliana Henao, Jaime R. Cantera, Piotr Rzymski. Conserving the Amazon River Basin: The case study of the Yahuarcaca Lakes System in Colombia. Science of The Total Environment. 2020; 724 ():138186.

Chicago/Turabian Style

Eliana Henao; Jaime R. Cantera; Piotr Rzymski. 2020. "Conserving the Amazon River Basin: The case study of the Yahuarcaca Lakes System in Colombia." Science of The Total Environment 724, no. : 138186.

Journal article
Published: 10 February 2020 in Toxins
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Selected species of cyanobacteria and green algae have been reported to produce lipophilic polymethoxy-1-alkenes (PMAs) which were shown to exhibit in vivo teratogenicity. Considering that information on PMAs in Arthospira sp. (known commercially as Spirulina) and Chlorella sp. cultivated for food supplement production was essentially lacking, the present study screened Chlorella (n = 10) and Spirulina (n = 13) food supplements registered in the European Union. Mass spectrometry analysis of column fractionated extracts was performed. None of the four variants previously reported in some cyanobacteria and green algae, nor any potentially related structures were detected in the studied samples. Since the isolated lipophilic fractions contained various compounds, they were further screened for in vivo teratogenicity in Danio rerio embryo, and for the potential to induce oxidative stress and genotoxicity in the liver and neurotoxicity in the brain of adult zebrafish. None of the tested food supplements had detectable levels of PMAs or any potentially related structures. No teratogenicity was revealed except for spinal curvature induced by fractions obtained from two Chlorella products. Selected fractions revealed cytotoxicity as indicated by an increased level of reactive oxygen species, catalase activity, lipid peroxidation and increased frequency of DNA strand breaks in hepatic tissue. The majority (60%) of Chlorella fractions induced an increase in cholinesterase activity in zebrafish brain homogenate while exposure to 61.5% of Spirulina fractions was associated with its decrease. The present study confirms that Chlorella and Spirulina food supplements are free of teratogenic PMAs, although the observed in vivo toxicities raise questions regarding the quality of selected products.

ACS Style

Eliana Henao; Patrick J. Murphy; Halina Falfushynska; Oksana Horyn; Daniel M. Evans; Piotr Klimaszyk; Piotr Rzymski. Polymethoxy-1-Alkenes Screening of Chlorella and Spirulina Food Supplements Coupled with In Vivo Toxicity Studies. Toxins 2020, 12, 111 .

AMA Style

Eliana Henao, Patrick J. Murphy, Halina Falfushynska, Oksana Horyn, Daniel M. Evans, Piotr Klimaszyk, Piotr Rzymski. Polymethoxy-1-Alkenes Screening of Chlorella and Spirulina Food Supplements Coupled with In Vivo Toxicity Studies. Toxins. 2020; 12 (2):111.

Chicago/Turabian Style

Eliana Henao; Patrick J. Murphy; Halina Falfushynska; Oksana Horyn; Daniel M. Evans; Piotr Klimaszyk; Piotr Rzymski. 2020. "Polymethoxy-1-Alkenes Screening of Chlorella and Spirulina Food Supplements Coupled with In Vivo Toxicity Studies." Toxins 12, no. 2: 111.

Review
Published: 20 December 2019 in Toxins
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Cyanobacterial metabolites are increasingly studied, in regards to their biosynthesis, ecological role, toxicity, and potential biomedical applications. However, the history of cyanotoxins prior to the last few decades is virtually unknown. Only a few paleolimnological studies have been undertaken to date, and these have focused exclusively on microcystins and cylindrospermopsins, both successfully identified in lake sediments up to 200 and 4700 years old, respectively. In this paper, we review direct extraction, quantification, and application of cyanotoxins in sediment cores, and put forward future research prospects in this field. Cyanobacterial toxin research is also compared to other paleo-cyanobacteria tools, such as sedimentary pigments, akinetes, and ancient DNA isolation, to identify the role of each tool in reproducing the history of cyanobacteria. Such investigations may also be beneficial for further elucidation of the biological role of cyanotoxins, particularly if coupled with analyses of other abiotic and biotic sedimentary features. In addition, we identify current limitations as well as future directions for applications in the field of paleolimnological studies on cyanotoxins.

ACS Style

Eliana Henao; Piotr Rzymski; Matthew Waters. A Review on the Study of Cyanotoxins in Paleolimnological Research: Current Knowledge and Future Needs. Toxins 2019, 12, 6 .

AMA Style

Eliana Henao, Piotr Rzymski, Matthew Waters. A Review on the Study of Cyanotoxins in Paleolimnological Research: Current Knowledge and Future Needs. Toxins. 2019; 12 (1):6.

Chicago/Turabian Style

Eliana Henao; Piotr Rzymski; Matthew Waters. 2019. "A Review on the Study of Cyanotoxins in Paleolimnological Research: Current Knowledge and Future Needs." Toxins 12, no. 1: 6.

Journal article
Published: 12 December 2019 in Nutrients
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Cardiovascular diseases remain the leading global cause of mortality indicating the need to identify all possible factors reducing primary and secondary risk. This study screened the in vitro antiplatelet and anticoagulant activities of hot water extracts of eight edible mushroom species (Agaricus bisporus, Auricularia auricularia-judae, Coprinus comatus, Ganoderma lucidum, Hericium erinaceus, Lentinula edodes, Pleurotus eryngii, and Pleurotus ostreatus) increasingly cultivated for human consumption, and compared them to those evoked by acetylsalicylic acid (ASA). The antioxidant capacity and concentration of polysaccharides, phenolic compounds, organic acids, ergosterol, macro elements, and trace elements were also characterized. The most promising antiplatelet effect was exhibited by A. auricularia-judae and P. eryngii extracts as demonstrated by the highest rate of inhibition of adenosine-5′-diphosphate (ADP)-induced and arachidonic acid (AA)-induced aggregation. The response to both extracts exceeded the one evoked by 140 µmol/L of ASA in the ADP test and was comparable to it in the case of the AA test. Such a dual effect was also observed for G. lucidum extract, even though it was proven to be cytotoxic in platelets and leukocytes. The extract of P. ostreatus revealed an additive effect on AA-induced platelet aggregation. None of the mushroom extracts altered the monitored coagulation parameters (prothrombin time, prothrombin ratio, and International Normalized Ratio). The effect of mushroom extracts on platelet function was positively related to their antioxidative properties and concentration of polysaccharides and ergosterol, and inversely related to zinc concentration. The study suggests that selected mushrooms may exert favorable antiplatelet effects, highlighting the need for further experimental and clinical research in this regard.

ACS Style

Barbara Poniedziałek; Marek Siwulski; Adrian Wiater; Iwona Komaniecka; Anna Komosa; Monika Gąsecka; Zuzanna Magdziak; Mirosław Mleczek; Przemysław Niedzielski; Jędrzej Proch; Mariola Ropacka-Lesiak; Maciej Lesiak; Eliana Henao; Piotr Rzymski. The Effect of Mushroom Extracts on Human Platelet and Blood Coagulation: In vitro Screening of Eight Edible Species. Nutrients 2019, 11, 3040 .

AMA Style

Barbara Poniedziałek, Marek Siwulski, Adrian Wiater, Iwona Komaniecka, Anna Komosa, Monika Gąsecka, Zuzanna Magdziak, Mirosław Mleczek, Przemysław Niedzielski, Jędrzej Proch, Mariola Ropacka-Lesiak, Maciej Lesiak, Eliana Henao, Piotr Rzymski. The Effect of Mushroom Extracts on Human Platelet and Blood Coagulation: In vitro Screening of Eight Edible Species. Nutrients. 2019; 11 (12):3040.

Chicago/Turabian Style

Barbara Poniedziałek; Marek Siwulski; Adrian Wiater; Iwona Komaniecka; Anna Komosa; Monika Gąsecka; Zuzanna Magdziak; Mirosław Mleczek; Przemysław Niedzielski; Jędrzej Proch; Mariola Ropacka-Lesiak; Maciej Lesiak; Eliana Henao; Piotr Rzymski. 2019. "The Effect of Mushroom Extracts on Human Platelet and Blood Coagulation: In vitro Screening of Eight Edible Species." Nutrients 11, no. 12: 3040.