Showing papers by "Norwegian Institute of Public Health published in 1985"
TL;DR: The genotoxic effects associated with 2-BA and its detection in microsomal incubations makes it a likely candidate for a role in the mutagenicity of Tris-BP, which was found to cause mutations in Salmonella typhimurium TA 100 both in the absence and presence of a metabolic system.
Abstract: 2-Bromoacrolein (2-BA) and 2,3-dibromopropanal (2,3-DBPA), an identified and a postulated reactive metabolite of tris(2,3-dibromopropyl)phosphate (Tris-BP), respectively, were found to cause mutations in Salmonella typhimurium TA 100 both in the absence and presence of a metabolic system. 2-BA, as well as 2,3-DBPA, caused extensive DNA single-stranded breaks as evidenced by alkaline elution of DNA from exposed Reuber hepatoma cells in culture. The data with Syrian hamster embryo cells suggest that both 2-BA and 2,3-DBPA were more potent than Tris-BP in transforming these cells in culture. On the other hand, neither 2-BA, nor 2,3-DBPA, was found to cause increased unscheduled DNA repair synthesis in isolated rat hepatocytes in monolayer cultures, whereas Tris-BP had a significant effect at low concentrations (10-50 microM). There was no correlation between the observed mutagenic effects of 2-BA and 2,3-DBPA and their alkylating activities using the nitrobenzyl-pyridine test. The genotoxic effects associated with 2-BA and its detection in microsomal incubations makes it a likely candidate for a role in the mutagenicity of Tris-BP.
8 citations
TL;DR: A comparative study of the Stainer and Scholte chemically defined growth medium for Bordetella pertussis, and a modification of it (MSS), was made and it was confirmed that liquid media gave a better total expression of the agglutinogens than solid media.
4 citations