Agents of earthy-musty taste and odor in water: Evaluation of cytotoxicity, genotoxicity and toxicogenomics

作者：Burgos Leonel; Lehmann Mauricio; Simon Daniel; Rodrigues de Andrade Heloisa Helena; Ribas de Abreu Bianca Regina; Nabinger Debora Dreher; Grivicich Ivana; Juliano Viviane Berwanger; Dihl Rafael Rodrigues^*

来源：Science of the Total Environment, 2014, 490: 679-685.

DOI：10.1016/j.scitotenv.2014.05.047

• 2-MIB
• GEO
• Comet assay
• CBMN-Cyt
• Gene expression
• MTT assay

Considering the limited number of studies on the biological effects on human health of cyanobacterial compounds that cause taste and odor, the present study assessed the cytotoxic and genotoxic potentials of 2-methylisoborneol (2-MIB) and geosmin (GEO) using the MTT assay and the in vitro comet and cytokinesis-block micronucleus (CBMN-Cyt) assays in human HepG2 cells. The toxicogenomics of genes responsive to DNA damage and metabolization by the exposure of cells to 2-MIB and GEO were also investigated. The results showed that concentrations of 2-MIB and GEO above 100 and 75 mu g/mL, respectively, were cytotoxic to HepG2 cells. Doses of 2-MIB (12.5, 25, 50, 75 and 100 mu g/ mL) and GEO (12.5, 25, 50, and 75 mu g/mL) were unable to induce neither DNA damage nor events associated with chromosomal instability. Similarly, no concentration of each compound induced increments in the expression of CDKN1A, GADD45 alpha, MDM2 and TP53 DNA damage responsive genes as well as in CYP1A1 and CYP1A2 metabolizing genes. Although cytotoxicity was observed, concentrations that caused it are much higher than those expected to occur in aquatic environments. Thus, environmentally relevant concentrations of both compounds are not expected to exhibit cytotoxicity or genotoxicity to humans.

• 出版日期2014-8-15