2026-07-15T12:25:28Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/76162024-07-25T07:49:19Zcom_10259_9476com_10259.4_106com_10259_2604col_10259_9477

00925njm 22002777a 4500 dc Laguna Teno, Félix author Suarez Diez, Maria author Tamayo Ramos, Juan Antonio author 2020-08 Graphene oxide has become a very appealing nanomaterial during the last years for many different applications, but its possible impact in different biological systems remains unclear. Here, an assessment to understand the toxicity of different commercial graphene oxide nanomaterials on the unicellular fungal model organism Saccharomyces cerevisiae was performed. For this task, an RNA purification protocol was optimized to avoid the high nucleic acid absorption capacity of graphene oxide. The developed protocol is based on a sorbitol gradient separation process for the isolation of adequate ribonucleic acid levels (in concentration and purity) from yeast cultures exposed to the carbon derived nanomaterial. To pinpoint potential toxicity mechanisms and pathways, the transcriptome of S. cerevisiae exposed to 160 mg L–1 of monolayer graphene oxide (GO) and graphene oxide nanocolloids (GOC) was studied and compared. Both graphene oxide products induced expression changes in a common group of genes (104), many of them related to iron homeostasis, starvation and stress response, amino acid metabolism and formate catabolism. Also, a high number of genes were only differentially expressed in either GO (236) or GOC (1077) exposures, indicating that different commercial products can induce specific changes in the physiological state of the fungus. 1664-302X http://hdl.handle.net/10259/7616 10.3389/fmicb.2020.01943 1664-302X Saccharomyces cerevisiae Biological response Commercial graphene oxide Chelating agent RNA isolation Transcriptomics Differential expression Commonalities and Differences in the Transcriptional Response of the Model Fungus Saccharomyces cerevisiae to Different Commercial Graphene Oxide Materials