Geosmin induces genomic instability in the mammalian cell microplate-based comet assay.

Abstract

Geosmin (GEO) (trans-1,10-dimethyl-trans-9-decalol) is a metabolite that renders earthy and musty taste and odor to water. Data of GEO genotoxicity on mammalian cells are scarce in the literature. Thus, the present study assessed the genotoxicity of GEO on Chinese hamster ovary (CHO) cells in the microplate-based comet assay. The percent of tail DNA (tail intensity (TI)), tail moment (TM), and tail length (TL) were used as parameters for DNA damage assessment. The results demonstrated that concentrations of GEO of 30 and 60 μg/mL were genotoxic to CHO cells after 4- and 24-h exposure periods, in all parameters evaluated, such as TI, TM, and TL. Additionally, GEO 15 μg/mL was genotoxic in the three parameters only in the 24-h exposure time. The same was observed for GEO 7.5 μg/mL, which induced significant DNA damage observed as TI in the 24-h treatment. The results present evidence that exposure to GEO may be associated with genomic instability in mammalian cells.

• Authors: Aline Flor Silva, Mauricio Lehmann, Rafael Rodrigues Dihl
• Journal: Environmental science and pollution research international (Environ Sci Pollut Res Int) Vol. 22 Issue 21 Pg. 17244-8 (Nov 2015) ISSN: 1614-7499 [Electronic] Germany
• PMID: 26411446 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Naphthols
• Water Pollutants, Chemical
• DNA
• geosmin

Topics

• Animals
• CHO Cells
• Comet Assay
• Cricetinae
• Cricetulus
• DNA (genetics)
• DNA Damage
• Genomic Instability (drug effects)
• Naphthols (chemistry, toxicity)
• Odorants
• Water Pollutants, Chemical (chemistry, toxicity)