RT Journal Article
T1 Exposure to TiO2 nanoparticles induces shifts in the microbiota composition of Mytilus galloprovincialis hemolymph
A1 Auguste, Manon
A1 Lasa González, Aide
A1 Pallavicini, Alberto
A1 Gualdi, Stefano
A1 Vezzulli, Luigi
A1 Canesi, Laura
K1 TiO2 nanoparticles
K1 Mytilus
K1 Hemolymph
K1 Microbiota
K1 16S rRNA
K1 Innate immunity
AB It is now recognized that host microbiome, the community of microorganisms that colonize the animal body (e.g. microbiota) and their genomes, play an important role in the health status of all organisms, from nutrient processing to protection from disease. In particular, the complex, bilateral interactions between the host innate immune system and the microbiota are crucial in maintaining whole body homeostasis.The development of nanotechnology is raising concern on the potential impact of nanoparticles-NPs on human and environmental health. Titanium dioxide-nTiO2, one of the most widely NP in use, has been shown to affect the gut microbiota of mammals and fish, as well as to potentially alter microbial communities. In the marine bivalve Mytilus galloprovincialis, nTiO2 has been previously shown to interact with hemolymph components, thus resulting in immunomodulation. However, no information is available on the possible impact of NPs on the microbiome of marine organisms.Bivalves host high microbial abundance and diversity, and alteration of their microbiota, in both tissues and hemolymph, in response to stressful conditions has been linked to a compromised health status and susceptibility to diseases. In this work, the effects of nTiO2 exposure (100 μg/L, 4 days) on Mytilus hemolymph microbiota were investigated by 16S rRNA gene-based profiling. Immune parameters were also evaluated. Although hemolymph microbiota of control and nTiO2-treated mussels revealed a similar core composition, nTiO2 exposure affected the abundance of different genera, with decreases in some (e.g. Shewanella, Kistimonas, Vibrio) and increases in others (e.g. Stenotrophomonas). The immunomodulatory effects of nTiO2 were confirmed by the increase in the bactericidal activity of whole hemolymph. These represent the first data on the effects of NPs on the microbiome of marine invertebrates, and suggest that the shift in hemolymph microbiome composition induced by nTiO2 may result from the interplay between the microbiota and the immune system
PB Elsevier
SN 0048-9697
YR 2019
FD 2019
LK http://hdl.handle.net/10347/20309
UL http://hdl.handle.net/10347/20309
LA eng
NO Auguste, M., Lasa, A., Pallavicini, A., Gualdi, S., Vezzulli, L., & Canesi, L. (2019). Exposure to TiO2 nanoparticles induces shifts in the microbiota composition of Mytilus galloprovincialis hemolymph. Science Of The Total Environment, 670, 129-137. doi: 10.1016/j.scitotenv.2019.03.133
NO This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement PANDORA N° 671881 and the EU project H2020 VIVALDI grant number N° 678589
DS Minerva
RD 22 abr 2026