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The link between pharmaceuticals and cyanobacteria: a review regarding ecotoxicological, ecological, and sanitary aspects

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Abstract

Cyanobacteria are important for ecosystem functioning, but eutrophication may affect the surrounding biome by losing ecosystem services and/or through affecting the cyanotoxins production that threatens ecological and human health. Pollution is an environmental issue that affects aquatic ecosystems worldwide, and the knowledge of the role of synthetic chemicals such as pharmaceuticals is still scarce. Therefore, studies coupling these two relevant issues are essential to better understand the ecological risks and the potential threats to public health. Thus, an overview of ecotoxicological tests performed in the literature exposing cyanobacteria to pharmaceuticals and the possible consequences regarding ecological and sanitary aspects was conducted. Moreover, a risk assessment was performed to enable a better understanding of pharmaceuticals affecting cyanobacteria ecology. Most of the studies found in the literature tested isolated pharmaceuticals in laboratory conditions, while others assessed mixture effects on in situ conditions. The endpoints most assessed were growth, photosynthesis, and antioxidant enzyme activity. The studies also point out that cyanobacteria may present resistance or sensitivity depending on the concentrations and the therapeutic class, which may cause a change in the ecosystem dynamics and/or sanitary implications due to cyanotoxin production. The risk assessment highlighted that antibiotics are among the most relevant substances due to the chemical diversity and higher levels found in the environment than other therapeutic classes. This review highlighted gaps regarding cyanotoxin release into aquatic environments due to the occurrence of pharmaceuticals and the need for more realistic experiments to better understand the potential consequences for human and environmental health.

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All data generated or analyzed during this study are included in this published article and its supplementary information files.

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Funding

Authors thank to Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)- (n° 430383/2018-5), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)- Finance Code 001, Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), and Departamento de Inovação da Universidade do Estado do Rio de Janeiro (InovUerj) for the financial support received.

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RDSC: conceptualized the article and drafted the manuscript and literature search. GRQ: drafted the manuscript, literature search, and data analysis. HDSO: drafted the manuscript and literature search. VSDA: correction and critical review of the manuscript. JAN: writing – original draft, correction and critical review of the manuscript, and research coordinator. All authors read and approved the final manuscript.

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Correspondence to Julio Alejandro Navoni.

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The authors declare no competing interests.

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Responsible Editor: Robert Duran

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dos Santos Costa, R., Quadra, G.R., de Oliveira Souza, H. et al. The link between pharmaceuticals and cyanobacteria: a review regarding ecotoxicological, ecological, and sanitary aspects. Environ Sci Pollut Res 28, 41638–41650 (2021). https://doi.org/10.1007/s11356-021-14698-5

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  • DOI: https://doi.org/10.1007/s11356-021-14698-5

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