Rapid inactivation of 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone (MX), a potent mutagen in chlorinated drinking water, by sulfhydryl compounds

Add time:08/27/2019    Source:sciencedirect.com

The mutagenic activity of 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone (MX), which is formed during chlorination of drinking water, was effectively inhibited by sulfhydryl compounds such as cysteine, cysteamine, glutathione, dithiothreitol and 2-mercaptoethanol. Preincubation of 0.5 μg MX with 15 μg cysteine (molar ratio 1:37) in a phosphate buffer (pH 6.0–8.0) at 37°C for 15 min prior to exposure of bacterial cells depleted the mutagenic activity of MX. Together with the result showing a change in the UV spectra, it is suggested that sulfhydryl compounds inactivate MX by direct chemical interaction before MX induces DNA damage. On the other hand, a variety of antioxidants other than the sulfhydryl compounds showed no inhibitory effects. Investigation using structural analogs of cysteine revealed that the thiol moiety was indispensable for antimutagenic activity and the amino moiety appeared to enhance the MX-inactivating reaction of the SH group.

We also recommend Trading Suppliers and Manufacturers of 3,4-dichloro-5-(dichloromethyl)-5-hydroxy-furan-2-one (cas 108082-06-0). Pls Click Website Link as below: cas 108082-06-0 suppliers

Prev:Cytogenetic effects of 3-chloro-4-(dichloromethyl)-5-hydroxy-2(50H)-furanone (MX) in rat peripheral lymphocytes in vitro and in vivo
Next:Enhancing effects of 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone (MX) on cell proliferation and lipid peroxidation in the rat gastric mucosa)