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Open AccessArticle

Use of Cyanobacterial Luminescent Bioreporters to Report on the Environmental Impact of Metallic Nanoparticles

1
Departamento de Biología, Facultad de ciencias, Universidad Autónoma de Madrid, 28029 Madrid, Spain
2
Departamento de Ingeniería Química, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(16), 3597; https://doi.org/10.3390/s19163597
Received: 26 July 2019 / Revised: 6 August 2019 / Accepted: 12 August 2019 / Published: 19 August 2019
(This article belongs to the Special Issue Advanced Sensors for the Detection of Heavy Metals)
Due to their ecological relevance, low cost, and easy maintenance, cyanobacteria have been used for bioreporter development. In this study, a battery of cyanobacterial bioreporters has been used to assess the ecotoxicity of four highly used metallic nanoparticles (NPs). The toxicity of these NPs was tested using the bioreporter Nostoc CPB4337 (Anabaena CPB4337). As oxidative stress is a primary toxic mechanism of metallic NPs, cyanobacterial reactive oxygen species (ROS)-detecting bioreporters were used. Metallic NPs release metal ions, which contribute to their toxic effect and the formation of ROS, so a metal-detecting bioreporter was also used to detect the bioavailable metals. The results confirm that ROS production by NPs was due to the NPs per se and not by released free-ions, which in fact were almost undetectable. Although the metal-detecting bioreporter could not detect the dissolved metal ions, it was able to detect the metallic NPs themselves, indicating that this bioreporter may be useful to detect them in the environment. ROS production varied depending on the growth medium or environmental matrices conditions and on the NP type. This work demonstrated the different levels of ROS production by metallic NPs and the importance of nanotoxicology studies in real matrices. View Full-Text
Keywords: cyanobacterial bioreporters; toxicity; oxidative stress; metallic nanoparticles; released free-ion cyanobacterial bioreporters; toxicity; oxidative stress; metallic nanoparticles; released free-ion
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MDPI and ACS Style

Hurtado-Gallego, J.; Leganés, F.; Rosal, R.; Fernández-Piñas, F. Use of Cyanobacterial Luminescent Bioreporters to Report on the Environmental Impact of Metallic Nanoparticles. Sensors 2019, 19, 3597.

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